a7f49ac9a1
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1459 lines
57 KiB
C++
1459 lines
57 KiB
C++
/*************************************************************************/
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/* space_bullet.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "space_bullet.h"
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#include "bullet_physics_server.h"
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#include "bullet_types_converter.h"
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#include "bullet_utilities.h"
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#include "constraint_bullet.h"
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#include "core/project_settings.h"
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#include "core/ustring.h"
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#include "godot_collision_configuration.h"
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#include "godot_collision_dispatcher.h"
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#include "rigid_body_bullet.h"
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#include "servers/physics_server.h"
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#include "soft_body_bullet.h"
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#include <BulletCollision/BroadphaseCollision/btBroadphaseProxy.h>
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#include <BulletCollision/CollisionDispatch/btCollisionObject.h>
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#include <BulletCollision/CollisionDispatch/btGhostObject.h>
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#include <BulletCollision/NarrowPhaseCollision/btGjkEpaPenetrationDepthSolver.h>
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#include <BulletCollision/NarrowPhaseCollision/btGjkPairDetector.h>
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#include <BulletCollision/NarrowPhaseCollision/btPointCollector.h>
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#include <BulletSoftBody/btSoftBodyRigidBodyCollisionConfiguration.h>
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#include <BulletSoftBody/btSoftRigidDynamicsWorld.h>
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#include <btBulletDynamicsCommon.h>
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#include <assert.h>
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/**
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@author AndreaCatania
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*/
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BulletPhysicsDirectSpaceState::BulletPhysicsDirectSpaceState(SpaceBullet *p_space) :
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PhysicsDirectSpaceState(),
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space(p_space) {}
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int BulletPhysicsDirectSpaceState::intersect_point(const Vector3 &p_point, ShapeResult *r_results, int p_result_max, const Set<RID> &p_exclude, uint32_t p_collision_mask, bool p_collide_with_bodies, bool p_collide_with_areas) {
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if (p_result_max <= 0)
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return 0;
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btVector3 bt_point;
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G_TO_B(p_point, bt_point);
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btSphereShape sphere_point(0.001f);
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btCollisionObject collision_object_point;
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collision_object_point.setCollisionShape(&sphere_point);
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collision_object_point.setWorldTransform(btTransform(btQuaternion::getIdentity(), bt_point));
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// Setup query
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GodotAllContactResultCallback btResult(&collision_object_point, r_results, p_result_max, &p_exclude, p_collide_with_bodies, p_collide_with_areas);
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btResult.m_collisionFilterGroup = 0;
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btResult.m_collisionFilterMask = p_collision_mask;
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space->dynamicsWorld->contactTest(&collision_object_point, btResult);
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// The results is already populated by GodotAllConvexResultCallback
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return btResult.m_count;
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}
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bool BulletPhysicsDirectSpaceState::intersect_ray(const Vector3 &p_from, const Vector3 &p_to, RayResult &r_result, const Set<RID> &p_exclude, uint32_t p_collision_mask, bool p_collide_with_bodies, bool p_collide_with_areas, bool p_pick_ray) {
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btVector3 btVec_from;
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btVector3 btVec_to;
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G_TO_B(p_from, btVec_from);
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G_TO_B(p_to, btVec_to);
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// setup query
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GodotClosestRayResultCallback btResult(btVec_from, btVec_to, &p_exclude, p_collide_with_bodies, p_collide_with_areas);
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btResult.m_collisionFilterGroup = 0;
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btResult.m_collisionFilterMask = p_collision_mask;
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btResult.m_pickRay = p_pick_ray;
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space->dynamicsWorld->rayTest(btVec_from, btVec_to, btResult);
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if (btResult.hasHit()) {
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B_TO_G(btResult.m_hitPointWorld, r_result.position);
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B_TO_G(btResult.m_hitNormalWorld.normalize(), r_result.normal);
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CollisionObjectBullet *gObj = static_cast<CollisionObjectBullet *>(btResult.m_collisionObject->getUserPointer());
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if (gObj) {
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r_result.shape = btResult.m_shapeId;
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r_result.rid = gObj->get_self();
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r_result.collider_id = gObj->get_instance_id();
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r_result.collider = 0 == r_result.collider_id ? NULL : ObjectDB::get_instance(r_result.collider_id);
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} else {
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WARN_PRINTS("The raycast performed has hit a collision object that is not part of Godot scene, please check it.");
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}
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return true;
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} else {
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return false;
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}
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}
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int BulletPhysicsDirectSpaceState::intersect_shape(const RID &p_shape, const Transform &p_xform, float p_margin, ShapeResult *r_results, int p_result_max, const Set<RID> &p_exclude, uint32_t p_collision_mask, bool p_collide_with_bodies, bool p_collide_with_areas) {
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if (p_result_max <= 0)
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return 0;
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ShapeBullet *shape = space->get_physics_server()->get_shape_owner()->get(p_shape);
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btCollisionShape *btShape = shape->create_bt_shape(p_xform.basis.get_scale_abs(), p_margin);
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if (!btShape->isConvex()) {
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bulletdelete(btShape);
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ERR_PRINTS("The shape is not a convex shape, then is not supported: shape type: " + itos(shape->get_type()));
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return 0;
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}
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btConvexShape *btConvex = static_cast<btConvexShape *>(btShape);
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btTransform bt_xform;
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G_TO_B(p_xform, bt_xform);
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UNSCALE_BT_BASIS(bt_xform);
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btCollisionObject collision_object;
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collision_object.setCollisionShape(btConvex);
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collision_object.setWorldTransform(bt_xform);
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GodotAllContactResultCallback btQuery(&collision_object, r_results, p_result_max, &p_exclude, p_collide_with_bodies, p_collide_with_areas);
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btQuery.m_collisionFilterGroup = 0;
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btQuery.m_collisionFilterMask = p_collision_mask;
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btQuery.m_closestDistanceThreshold = 0;
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space->dynamicsWorld->contactTest(&collision_object, btQuery);
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bulletdelete(btConvex);
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return btQuery.m_count;
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}
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bool BulletPhysicsDirectSpaceState::cast_motion(const RID &p_shape, const Transform &p_xform, const Vector3 &p_motion, float p_margin, float &r_closest_safe, float &r_closest_unsafe, const Set<RID> &p_exclude, uint32_t p_collision_mask, bool p_collide_with_bodies, bool p_collide_with_areas, ShapeRestInfo *r_info) {
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ShapeBullet *shape = space->get_physics_server()->get_shape_owner()->get(p_shape);
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btCollisionShape *btShape = shape->create_bt_shape(p_xform.basis.get_scale(), p_margin);
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if (!btShape->isConvex()) {
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bulletdelete(btShape);
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ERR_PRINTS("The shape is not a convex shape, then is not supported: shape type: " + itos(shape->get_type()));
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return false;
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}
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btConvexShape *bt_convex_shape = static_cast<btConvexShape *>(btShape);
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btVector3 bt_motion;
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G_TO_B(p_motion, bt_motion);
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btTransform bt_xform_from;
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G_TO_B(p_xform, bt_xform_from);
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UNSCALE_BT_BASIS(bt_xform_from);
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btTransform bt_xform_to(bt_xform_from);
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bt_xform_to.getOrigin() += bt_motion;
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GodotClosestConvexResultCallback btResult(bt_xform_from.getOrigin(), bt_xform_to.getOrigin(), &p_exclude, p_collide_with_bodies, p_collide_with_areas);
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btResult.m_collisionFilterGroup = 0;
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btResult.m_collisionFilterMask = p_collision_mask;
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space->dynamicsWorld->convexSweepTest(bt_convex_shape, bt_xform_from, bt_xform_to, btResult, space->dynamicsWorld->getDispatchInfo().m_allowedCcdPenetration);
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r_closest_unsafe = 1.0;
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r_closest_safe = 1.0;
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if (btResult.hasHit()) {
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const btScalar l = bt_motion.length();
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r_closest_unsafe = btResult.m_closestHitFraction;
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r_closest_safe = MAX(r_closest_unsafe - (1 - ((l - 0.01) / l)), 0);
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if (r_info) {
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if (btCollisionObject::CO_RIGID_BODY == btResult.m_hitCollisionObject->getInternalType()) {
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B_TO_G(static_cast<const btRigidBody *>(btResult.m_hitCollisionObject)->getVelocityInLocalPoint(btResult.m_hitPointWorld), r_info->linear_velocity);
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}
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CollisionObjectBullet *collision_object = static_cast<CollisionObjectBullet *>(btResult.m_hitCollisionObject->getUserPointer());
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B_TO_G(btResult.m_hitPointWorld, r_info->point);
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B_TO_G(btResult.m_hitNormalWorld, r_info->normal);
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r_info->rid = collision_object->get_self();
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r_info->collider_id = collision_object->get_instance_id();
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r_info->shape = btResult.m_shapeId;
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}
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}
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bulletdelete(bt_convex_shape);
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return true; // Mean success
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}
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/// Returns the list of contacts pairs in this order: Local contact, other body contact
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bool BulletPhysicsDirectSpaceState::collide_shape(RID p_shape, const Transform &p_shape_xform, float p_margin, Vector3 *r_results, int p_result_max, int &r_result_count, const Set<RID> &p_exclude, uint32_t p_collision_mask, bool p_collide_with_bodies, bool p_collide_with_areas) {
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if (p_result_max <= 0)
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return 0;
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ShapeBullet *shape = space->get_physics_server()->get_shape_owner()->get(p_shape);
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btCollisionShape *btShape = shape->create_bt_shape(p_shape_xform.basis.get_scale_abs(), p_margin);
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if (!btShape->isConvex()) {
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bulletdelete(btShape);
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ERR_PRINTS("The shape is not a convex shape, then is not supported: shape type: " + itos(shape->get_type()));
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return 0;
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}
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btConvexShape *btConvex = static_cast<btConvexShape *>(btShape);
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btTransform bt_xform;
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G_TO_B(p_shape_xform, bt_xform);
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UNSCALE_BT_BASIS(bt_xform);
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btCollisionObject collision_object;
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collision_object.setCollisionShape(btConvex);
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collision_object.setWorldTransform(bt_xform);
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GodotContactPairContactResultCallback btQuery(&collision_object, r_results, p_result_max, &p_exclude, p_collide_with_bodies, p_collide_with_areas);
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btQuery.m_collisionFilterGroup = 0;
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btQuery.m_collisionFilterMask = p_collision_mask;
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btQuery.m_closestDistanceThreshold = 0;
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space->dynamicsWorld->contactTest(&collision_object, btQuery);
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r_result_count = btQuery.m_count;
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bulletdelete(btConvex);
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return btQuery.m_count;
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}
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bool BulletPhysicsDirectSpaceState::rest_info(RID p_shape, const Transform &p_shape_xform, float p_margin, ShapeRestInfo *r_info, const Set<RID> &p_exclude, uint32_t p_collision_mask, bool p_collide_with_bodies, bool p_collide_with_areas) {
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ShapeBullet *shape = space->get_physics_server()->get_shape_owner()->get(p_shape);
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btCollisionShape *btShape = shape->create_bt_shape(p_shape_xform.basis.get_scale_abs(), p_margin);
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if (!btShape->isConvex()) {
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bulletdelete(btShape);
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ERR_PRINTS("The shape is not a convex shape, then is not supported: shape type: " + itos(shape->get_type()));
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return 0;
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}
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btConvexShape *btConvex = static_cast<btConvexShape *>(btShape);
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btTransform bt_xform;
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G_TO_B(p_shape_xform, bt_xform);
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UNSCALE_BT_BASIS(bt_xform);
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btCollisionObject collision_object;
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collision_object.setCollisionShape(btConvex);
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collision_object.setWorldTransform(bt_xform);
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GodotRestInfoContactResultCallback btQuery(&collision_object, r_info, &p_exclude, p_collide_with_bodies, p_collide_with_areas);
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btQuery.m_collisionFilterGroup = 0;
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btQuery.m_collisionFilterMask = p_collision_mask;
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btQuery.m_closestDistanceThreshold = 0;
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space->dynamicsWorld->contactTest(&collision_object, btQuery);
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bulletdelete(btConvex);
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if (btQuery.m_collided) {
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if (btCollisionObject::CO_RIGID_BODY == btQuery.m_rest_info_collision_object->getInternalType()) {
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B_TO_G(static_cast<const btRigidBody *>(btQuery.m_rest_info_collision_object)->getVelocityInLocalPoint(btQuery.m_rest_info_bt_point), r_info->linear_velocity);
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}
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B_TO_G(btQuery.m_rest_info_bt_point, r_info->point);
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}
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return btQuery.m_collided;
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}
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Vector3 BulletPhysicsDirectSpaceState::get_closest_point_to_object_volume(RID p_object, const Vector3 p_point) const {
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RigidCollisionObjectBullet *rigid_object = space->get_physics_server()->get_rigid_collisin_object(p_object);
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ERR_FAIL_COND_V(!rigid_object, Vector3());
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btVector3 out_closest_point(0, 0, 0);
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btScalar out_distance = 1e20;
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btVector3 bt_point;
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G_TO_B(p_point, bt_point);
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btSphereShape point_shape(0.);
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btCollisionShape *shape;
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btConvexShape *convex_shape;
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btTransform child_transform;
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btTransform body_transform(rigid_object->get_bt_collision_object()->getWorldTransform());
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btGjkPairDetector::ClosestPointInput input;
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input.m_transformA.getBasis().setIdentity();
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input.m_transformA.setOrigin(bt_point);
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bool shapes_found = false;
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for (int i = rigid_object->get_shape_count() - 1; 0 <= i; --i) {
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shape = rigid_object->get_bt_shape(i);
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if (shape->isConvex()) {
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child_transform = rigid_object->get_bt_shape_transform(i);
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convex_shape = static_cast<btConvexShape *>(shape);
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input.m_transformB = body_transform * child_transform;
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btPointCollector result;
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btGjkPairDetector gjk_pair_detector(&point_shape, convex_shape, space->gjk_simplex_solver, space->gjk_epa_pen_solver);
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gjk_pair_detector.getClosestPoints(input, result, 0);
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if (out_distance > result.m_distance) {
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out_distance = result.m_distance;
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out_closest_point = result.m_pointInWorld;
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}
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}
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shapes_found = true;
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}
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if (shapes_found) {
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Vector3 out;
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B_TO_G(out_closest_point, out);
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return out;
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} else {
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// no shapes found, use distance to origin.
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return rigid_object->get_transform().get_origin();
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}
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}
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SpaceBullet::SpaceBullet() :
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broadphase(NULL),
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collisionConfiguration(NULL),
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dispatcher(NULL),
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solver(NULL),
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dynamicsWorld(NULL),
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soft_body_world_info(NULL),
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ghostPairCallback(NULL),
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godotFilterCallback(NULL),
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gravityDirection(0, -1, 0),
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gravityMagnitude(10),
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contactDebugCount(0),
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delta_time(0.) {
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create_empty_world(GLOBAL_DEF("physics/3d/active_soft_world", true));
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direct_access = memnew(BulletPhysicsDirectSpaceState(this));
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}
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SpaceBullet::~SpaceBullet() {
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memdelete(direct_access);
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destroy_world();
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}
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void SpaceBullet::flush_queries() {
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const btCollisionObjectArray &colObjArray = dynamicsWorld->getCollisionObjectArray();
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for (int i = colObjArray.size() - 1; 0 <= i; --i) {
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static_cast<CollisionObjectBullet *>(colObjArray[i]->getUserPointer())->dispatch_callbacks();
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}
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}
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void SpaceBullet::step(real_t p_delta_time) {
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delta_time = p_delta_time;
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dynamicsWorld->stepSimulation(p_delta_time, 0, 0);
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}
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void SpaceBullet::set_param(PhysicsServer::AreaParameter p_param, const Variant &p_value) {
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assert(dynamicsWorld);
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switch (p_param) {
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case PhysicsServer::AREA_PARAM_GRAVITY:
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gravityMagnitude = p_value;
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update_gravity();
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break;
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case PhysicsServer::AREA_PARAM_GRAVITY_VECTOR:
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gravityDirection = p_value;
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update_gravity();
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break;
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case PhysicsServer::AREA_PARAM_LINEAR_DAMP:
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case PhysicsServer::AREA_PARAM_ANGULAR_DAMP:
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break; // No damp
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case PhysicsServer::AREA_PARAM_PRIORITY:
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// Priority is always 0, the lower
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break;
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case PhysicsServer::AREA_PARAM_GRAVITY_IS_POINT:
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case PhysicsServer::AREA_PARAM_GRAVITY_DISTANCE_SCALE:
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case PhysicsServer::AREA_PARAM_GRAVITY_POINT_ATTENUATION:
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break;
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default:
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WARN_PRINTS("This set parameter (" + itos(p_param) + ") is ignored, the SpaceBullet doesn't support it.");
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break;
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}
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}
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Variant SpaceBullet::get_param(PhysicsServer::AreaParameter p_param) {
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switch (p_param) {
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case PhysicsServer::AREA_PARAM_GRAVITY:
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return gravityMagnitude;
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case PhysicsServer::AREA_PARAM_GRAVITY_VECTOR:
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return gravityDirection;
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case PhysicsServer::AREA_PARAM_LINEAR_DAMP:
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case PhysicsServer::AREA_PARAM_ANGULAR_DAMP:
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return 0; // No damp
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case PhysicsServer::AREA_PARAM_PRIORITY:
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return 0; // Priority is always 0, the lower
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case PhysicsServer::AREA_PARAM_GRAVITY_IS_POINT:
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return false;
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|
case PhysicsServer::AREA_PARAM_GRAVITY_DISTANCE_SCALE:
|
|
return 0;
|
|
case PhysicsServer::AREA_PARAM_GRAVITY_POINT_ATTENUATION:
|
|
return 0;
|
|
default:
|
|
WARN_PRINTS("This get parameter (" + itos(p_param) + ") is ignored, the SpaceBullet doesn't support it.");
|
|
return Variant();
|
|
}
|
|
}
|
|
|
|
void SpaceBullet::set_param(PhysicsServer::SpaceParameter p_param, real_t p_value) {
|
|
switch (p_param) {
|
|
case PhysicsServer::SPACE_PARAM_CONTACT_RECYCLE_RADIUS:
|
|
case PhysicsServer::SPACE_PARAM_CONTACT_MAX_SEPARATION:
|
|
case PhysicsServer::SPACE_PARAM_BODY_MAX_ALLOWED_PENETRATION:
|
|
case PhysicsServer::SPACE_PARAM_BODY_LINEAR_VELOCITY_SLEEP_THRESHOLD:
|
|
case PhysicsServer::SPACE_PARAM_BODY_ANGULAR_VELOCITY_SLEEP_THRESHOLD:
|
|
case PhysicsServer::SPACE_PARAM_BODY_TIME_TO_SLEEP:
|
|
case PhysicsServer::SPACE_PARAM_BODY_ANGULAR_VELOCITY_DAMP_RATIO:
|
|
case PhysicsServer::SPACE_PARAM_CONSTRAINT_DEFAULT_BIAS:
|
|
default:
|
|
WARN_PRINTS("This set parameter (" + itos(p_param) + ") is ignored, the SpaceBullet doesn't support it.");
|
|
break;
|
|
}
|
|
}
|
|
|
|
real_t SpaceBullet::get_param(PhysicsServer::SpaceParameter p_param) {
|
|
switch (p_param) {
|
|
case PhysicsServer::SPACE_PARAM_CONTACT_RECYCLE_RADIUS:
|
|
case PhysicsServer::SPACE_PARAM_CONTACT_MAX_SEPARATION:
|
|
case PhysicsServer::SPACE_PARAM_BODY_MAX_ALLOWED_PENETRATION:
|
|
case PhysicsServer::SPACE_PARAM_BODY_LINEAR_VELOCITY_SLEEP_THRESHOLD:
|
|
case PhysicsServer::SPACE_PARAM_BODY_ANGULAR_VELOCITY_SLEEP_THRESHOLD:
|
|
case PhysicsServer::SPACE_PARAM_BODY_TIME_TO_SLEEP:
|
|
case PhysicsServer::SPACE_PARAM_BODY_ANGULAR_VELOCITY_DAMP_RATIO:
|
|
case PhysicsServer::SPACE_PARAM_CONSTRAINT_DEFAULT_BIAS:
|
|
default:
|
|
WARN_PRINTS("The SpaceBullet doesn't support this get parameter (" + itos(p_param) + "), 0 is returned.");
|
|
return 0.f;
|
|
}
|
|
}
|
|
|
|
void SpaceBullet::add_area(AreaBullet *p_area) {
|
|
areas.push_back(p_area);
|
|
dynamicsWorld->addCollisionObject(p_area->get_bt_ghost(), p_area->get_collision_layer(), p_area->get_collision_mask());
|
|
}
|
|
|
|
void SpaceBullet::remove_area(AreaBullet *p_area) {
|
|
areas.erase(p_area);
|
|
dynamicsWorld->removeCollisionObject(p_area->get_bt_ghost());
|
|
}
|
|
|
|
void SpaceBullet::reload_collision_filters(AreaBullet *p_area) {
|
|
btGhostObject *ghost_object = p_area->get_bt_ghost();
|
|
|
|
btBroadphaseProxy *ghost_proxy = ghost_object->getBroadphaseHandle();
|
|
ghost_proxy->m_collisionFilterGroup = p_area->get_collision_layer();
|
|
ghost_proxy->m_collisionFilterMask = p_area->get_collision_mask();
|
|
|
|
dynamicsWorld->refreshBroadphaseProxy(ghost_object);
|
|
}
|
|
|
|
void SpaceBullet::add_rigid_body(RigidBodyBullet *p_body) {
|
|
if (p_body->is_static()) {
|
|
dynamicsWorld->addCollisionObject(p_body->get_bt_rigid_body(), p_body->get_collision_layer(), p_body->get_collision_mask());
|
|
} else {
|
|
dynamicsWorld->addRigidBody(p_body->get_bt_rigid_body(), p_body->get_collision_layer(), p_body->get_collision_mask());
|
|
p_body->scratch_space_override_modificator();
|
|
}
|
|
}
|
|
|
|
void SpaceBullet::remove_rigid_body(RigidBodyBullet *p_body) {
|
|
if (p_body->is_static()) {
|
|
dynamicsWorld->removeCollisionObject(p_body->get_bt_rigid_body());
|
|
} else {
|
|
dynamicsWorld->removeRigidBody(p_body->get_bt_rigid_body());
|
|
}
|
|
}
|
|
|
|
void SpaceBullet::reload_collision_filters(RigidBodyBullet *p_body) {
|
|
btRigidBody *rigid_body = p_body->get_bt_rigid_body();
|
|
|
|
btBroadphaseProxy *body_proxy = rigid_body->getBroadphaseProxy();
|
|
body_proxy->m_collisionFilterGroup = p_body->get_collision_layer();
|
|
body_proxy->m_collisionFilterMask = p_body->get_collision_mask();
|
|
|
|
dynamicsWorld->refreshBroadphaseProxy(rigid_body);
|
|
}
|
|
|
|
void SpaceBullet::add_soft_body(SoftBodyBullet *p_body) {
|
|
if (is_using_soft_world()) {
|
|
if (p_body->get_bt_soft_body()) {
|
|
p_body->get_bt_soft_body()->m_worldInfo = get_soft_body_world_info();
|
|
static_cast<btSoftRigidDynamicsWorld *>(dynamicsWorld)->addSoftBody(p_body->get_bt_soft_body(), p_body->get_collision_layer(), p_body->get_collision_mask());
|
|
}
|
|
} else {
|
|
ERR_PRINT("This soft body can't be added to non soft world");
|
|
}
|
|
}
|
|
|
|
void SpaceBullet::remove_soft_body(SoftBodyBullet *p_body) {
|
|
if (is_using_soft_world()) {
|
|
if (p_body->get_bt_soft_body()) {
|
|
static_cast<btSoftRigidDynamicsWorld *>(dynamicsWorld)->removeSoftBody(p_body->get_bt_soft_body());
|
|
p_body->get_bt_soft_body()->m_worldInfo = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
void SpaceBullet::reload_collision_filters(SoftBodyBullet *p_body) {
|
|
// This is necessary to change collision filter
|
|
remove_soft_body(p_body);
|
|
add_soft_body(p_body);
|
|
}
|
|
|
|
void SpaceBullet::add_constraint(ConstraintBullet *p_constraint, bool disableCollisionsBetweenLinkedBodies) {
|
|
p_constraint->set_space(this);
|
|
dynamicsWorld->addConstraint(p_constraint->get_bt_constraint(), disableCollisionsBetweenLinkedBodies);
|
|
}
|
|
|
|
void SpaceBullet::remove_constraint(ConstraintBullet *p_constraint) {
|
|
dynamicsWorld->removeConstraint(p_constraint->get_bt_constraint());
|
|
}
|
|
|
|
int SpaceBullet::get_num_collision_objects() const {
|
|
return dynamicsWorld->getNumCollisionObjects();
|
|
}
|
|
|
|
void SpaceBullet::remove_all_collision_objects() {
|
|
for (int i = dynamicsWorld->getNumCollisionObjects() - 1; 0 <= i; --i) {
|
|
btCollisionObject *btObj = dynamicsWorld->getCollisionObjectArray()[i];
|
|
CollisionObjectBullet *colObj = static_cast<CollisionObjectBullet *>(btObj->getUserPointer());
|
|
colObj->set_space(NULL);
|
|
}
|
|
}
|
|
|
|
void onBulletPreTickCallback(btDynamicsWorld *p_dynamicsWorld, btScalar timeStep) {
|
|
static_cast<SpaceBullet *>(p_dynamicsWorld->getWorldUserInfo())->flush_queries();
|
|
}
|
|
|
|
void onBulletTickCallback(btDynamicsWorld *p_dynamicsWorld, btScalar timeStep) {
|
|
|
|
const btCollisionObjectArray &colObjArray = p_dynamicsWorld->getCollisionObjectArray();
|
|
|
|
// Notify all Collision objects the collision checker is started
|
|
for (int i = colObjArray.size() - 1; 0 <= i; --i) {
|
|
static_cast<CollisionObjectBullet *>(colObjArray[i]->getUserPointer())->on_collision_checker_start();
|
|
}
|
|
|
|
SpaceBullet *sb = static_cast<SpaceBullet *>(p_dynamicsWorld->getWorldUserInfo());
|
|
sb->check_ghost_overlaps();
|
|
sb->check_body_collision();
|
|
|
|
for (int i = colObjArray.size() - 1; 0 <= i; --i) {
|
|
static_cast<CollisionObjectBullet *>(colObjArray[i]->getUserPointer())->on_collision_checker_end();
|
|
}
|
|
}
|
|
|
|
BulletPhysicsDirectSpaceState *SpaceBullet::get_direct_state() {
|
|
return direct_access;
|
|
}
|
|
|
|
btScalar calculateGodotCombinedRestitution(const btCollisionObject *body0, const btCollisionObject *body1) {
|
|
|
|
return CLAMP(body0->getRestitution() + body1->getRestitution(), 0, 1);
|
|
}
|
|
|
|
btScalar calculateGodotCombinedFriction(const btCollisionObject *body0, const btCollisionObject *body1) {
|
|
|
|
return ABS(MIN(body0->getFriction(), body1->getFriction()));
|
|
}
|
|
|
|
void SpaceBullet::create_empty_world(bool p_create_soft_world) {
|
|
|
|
gjk_epa_pen_solver = bulletnew(btGjkEpaPenetrationDepthSolver);
|
|
gjk_simplex_solver = bulletnew(btVoronoiSimplexSolver);
|
|
|
|
void *world_mem;
|
|
if (p_create_soft_world) {
|
|
world_mem = malloc(sizeof(btSoftRigidDynamicsWorld));
|
|
} else {
|
|
world_mem = malloc(sizeof(btDiscreteDynamicsWorld));
|
|
}
|
|
|
|
ERR_FAIL_COND_MSG(!world_mem, "Out of memory.");
|
|
|
|
if (p_create_soft_world) {
|
|
collisionConfiguration = bulletnew(GodotSoftCollisionConfiguration(static_cast<btDiscreteDynamicsWorld *>(world_mem)));
|
|
} else {
|
|
collisionConfiguration = bulletnew(GodotCollisionConfiguration(static_cast<btDiscreteDynamicsWorld *>(world_mem)));
|
|
}
|
|
|
|
dispatcher = bulletnew(GodotCollisionDispatcher(collisionConfiguration));
|
|
broadphase = bulletnew(btDbvtBroadphase);
|
|
solver = bulletnew(btSequentialImpulseConstraintSolver);
|
|
|
|
if (p_create_soft_world) {
|
|
dynamicsWorld = new (world_mem) btSoftRigidDynamicsWorld(dispatcher, broadphase, solver, collisionConfiguration);
|
|
soft_body_world_info = bulletnew(btSoftBodyWorldInfo);
|
|
} else {
|
|
dynamicsWorld = new (world_mem) btDiscreteDynamicsWorld(dispatcher, broadphase, solver, collisionConfiguration);
|
|
}
|
|
|
|
ghostPairCallback = bulletnew(btGhostPairCallback);
|
|
godotFilterCallback = bulletnew(GodotFilterCallback);
|
|
gCalculateCombinedRestitutionCallback = &calculateGodotCombinedRestitution;
|
|
gCalculateCombinedFrictionCallback = &calculateGodotCombinedFriction;
|
|
gContactAddedCallback = &godotContactAddedCallback;
|
|
|
|
dynamicsWorld->setWorldUserInfo(this);
|
|
|
|
dynamicsWorld->setInternalTickCallback(onBulletPreTickCallback, this, true);
|
|
dynamicsWorld->setInternalTickCallback(onBulletTickCallback, this, false);
|
|
dynamicsWorld->getBroadphase()->getOverlappingPairCache()->setInternalGhostPairCallback(ghostPairCallback); // Setup ghost check
|
|
dynamicsWorld->getPairCache()->setOverlapFilterCallback(godotFilterCallback);
|
|
|
|
if (soft_body_world_info) {
|
|
soft_body_world_info->m_broadphase = broadphase;
|
|
soft_body_world_info->m_dispatcher = dispatcher;
|
|
soft_body_world_info->m_sparsesdf.Initialize();
|
|
}
|
|
|
|
update_gravity();
|
|
}
|
|
|
|
void SpaceBullet::destroy_world() {
|
|
|
|
/// The world elements (like: Collision Objects, Constraints, Shapes) are managed by godot
|
|
|
|
dynamicsWorld->getBroadphase()->getOverlappingPairCache()->setInternalGhostPairCallback(NULL);
|
|
dynamicsWorld->getPairCache()->setOverlapFilterCallback(NULL);
|
|
|
|
bulletdelete(ghostPairCallback);
|
|
bulletdelete(godotFilterCallback);
|
|
|
|
// Deallocate world
|
|
dynamicsWorld->~btDiscreteDynamicsWorld();
|
|
free(dynamicsWorld);
|
|
dynamicsWorld = NULL;
|
|
|
|
bulletdelete(solver);
|
|
bulletdelete(broadphase);
|
|
bulletdelete(dispatcher);
|
|
bulletdelete(collisionConfiguration);
|
|
bulletdelete(soft_body_world_info);
|
|
bulletdelete(gjk_simplex_solver);
|
|
bulletdelete(gjk_epa_pen_solver);
|
|
}
|
|
|
|
void SpaceBullet::check_ghost_overlaps() {
|
|
|
|
/// Algorithm support variables
|
|
btCollisionShape *other_body_shape;
|
|
btConvexShape *area_shape;
|
|
btGjkPairDetector::ClosestPointInput gjk_input;
|
|
AreaBullet *area;
|
|
int x(-1), i(-1), y(-1), z(-1), indexOverlap(-1);
|
|
|
|
/// For each areas
|
|
for (x = areas.size() - 1; 0 <= x; --x) {
|
|
area = areas[x];
|
|
|
|
btVector3 area_scale(area->get_bt_body_scale());
|
|
|
|
if (!area->is_monitoring())
|
|
continue;
|
|
|
|
/// 1. Reset all states
|
|
for (i = area->overlappingObjects.size() - 1; 0 <= i; --i) {
|
|
AreaBullet::OverlappingObjectData &otherObj = area->overlappingObjects.write[i];
|
|
// This check prevent the overwrite of ENTER state
|
|
// if this function is called more times before dispatchCallbacks
|
|
if (otherObj.state != AreaBullet::OVERLAP_STATE_ENTER) {
|
|
otherObj.state = AreaBullet::OVERLAP_STATE_DIRTY;
|
|
}
|
|
}
|
|
|
|
/// 2. Check all overlapping objects using GJK
|
|
|
|
const btAlignedObjectArray<btCollisionObject *> ghostOverlaps = area->get_bt_ghost()->getOverlappingPairs();
|
|
|
|
// For each overlapping
|
|
for (i = ghostOverlaps.size() - 1; 0 <= i; --i) {
|
|
|
|
bool hasOverlap = false;
|
|
btCollisionObject *overlapped_bt_co = ghostOverlaps[i];
|
|
RigidCollisionObjectBullet *otherObject = static_cast<RigidCollisionObjectBullet *>(overlapped_bt_co->getUserPointer());
|
|
btVector3 other_body_scale(otherObject->get_bt_body_scale());
|
|
|
|
if (!area->is_transform_changed() && !otherObject->is_transform_changed()) {
|
|
hasOverlap = -1 != area->find_overlapping_object(otherObject);
|
|
goto collision_found;
|
|
}
|
|
|
|
if (overlapped_bt_co->getUserIndex() == CollisionObjectBullet::TYPE_AREA) {
|
|
if (!static_cast<AreaBullet *>(overlapped_bt_co->getUserPointer())->is_monitorable())
|
|
continue;
|
|
} else if (overlapped_bt_co->getUserIndex() != CollisionObjectBullet::TYPE_RIGID_BODY)
|
|
continue;
|
|
|
|
// For each area shape
|
|
for (y = area->get_shape_count() - 1; 0 <= y; --y) {
|
|
if (!area->get_bt_shape(y)->isConvex())
|
|
continue;
|
|
|
|
btTransform area_shape_treansform(area->get_bt_shape_transform(y));
|
|
area_shape_treansform.getOrigin() *= area_scale;
|
|
|
|
gjk_input.m_transformA =
|
|
area->get_transform__bullet() *
|
|
area_shape_treansform;
|
|
|
|
area_shape = static_cast<btConvexShape *>(area->get_bt_shape(y));
|
|
|
|
// For each other object shape
|
|
for (z = otherObject->get_shape_count() - 1; 0 <= z; --z) {
|
|
|
|
other_body_shape = static_cast<btCollisionShape *>(otherObject->get_bt_shape(z));
|
|
|
|
if (other_body_shape->isConcave())
|
|
continue;
|
|
|
|
btTransform other_shape_transform(otherObject->get_bt_shape_transform(z));
|
|
other_shape_transform.getOrigin() *= other_body_scale;
|
|
|
|
gjk_input.m_transformB =
|
|
otherObject->get_transform__bullet() *
|
|
other_shape_transform;
|
|
|
|
if (other_body_shape->isConvex()) {
|
|
|
|
btPointCollector result;
|
|
btGjkPairDetector gjk_pair_detector(
|
|
area_shape,
|
|
static_cast<btConvexShape *>(other_body_shape),
|
|
gjk_simplex_solver,
|
|
gjk_epa_pen_solver);
|
|
gjk_pair_detector.getClosestPoints(gjk_input, result, 0);
|
|
|
|
if (0 >= result.m_distance) {
|
|
hasOverlap = true;
|
|
goto collision_found;
|
|
}
|
|
|
|
} else {
|
|
|
|
btCollisionObjectWrapper obA(NULL, area_shape, area->get_bt_ghost(), gjk_input.m_transformA, -1, y);
|
|
btCollisionObjectWrapper obB(NULL, other_body_shape, otherObject->get_bt_collision_object(), gjk_input.m_transformB, -1, z);
|
|
|
|
btCollisionAlgorithm *algorithm = dispatcher->findAlgorithm(&obA, &obB, NULL, BT_CONTACT_POINT_ALGORITHMS);
|
|
|
|
if (!algorithm)
|
|
continue;
|
|
|
|
GodotDeepPenetrationContactResultCallback contactPointResult(&obA, &obB);
|
|
algorithm->processCollision(&obA, &obB, dynamicsWorld->getDispatchInfo(), &contactPointResult);
|
|
|
|
algorithm->~btCollisionAlgorithm();
|
|
dispatcher->freeCollisionAlgorithm(algorithm);
|
|
|
|
if (contactPointResult.hasHit()) {
|
|
hasOverlap = true;
|
|
goto collision_found;
|
|
}
|
|
}
|
|
|
|
} // ~For each other object shape
|
|
} // ~For each area shape
|
|
|
|
collision_found:
|
|
if (!hasOverlap)
|
|
continue;
|
|
|
|
indexOverlap = area->find_overlapping_object(otherObject);
|
|
if (-1 == indexOverlap) {
|
|
// Not found
|
|
area->add_overlap(otherObject);
|
|
} else {
|
|
// Found
|
|
area->put_overlap_as_inside(indexOverlap);
|
|
}
|
|
}
|
|
|
|
/// 3. Remove not overlapping
|
|
for (i = area->overlappingObjects.size() - 1; 0 <= i; --i) {
|
|
// If the overlap has DIRTY state it means that it's no more overlapping
|
|
if (area->overlappingObjects[i].state == AreaBullet::OVERLAP_STATE_DIRTY) {
|
|
area->put_overlap_as_exit(i);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void SpaceBullet::check_body_collision() {
|
|
#ifdef DEBUG_ENABLED
|
|
reset_debug_contact_count();
|
|
#endif
|
|
|
|
const int numManifolds = dynamicsWorld->getDispatcher()->getNumManifolds();
|
|
for (int i = 0; i < numManifolds; ++i) {
|
|
btPersistentManifold *contactManifold = dynamicsWorld->getDispatcher()->getManifoldByIndexInternal(i);
|
|
|
|
// I know this static cast is a bit risky. But I'm checking its type just after it.
|
|
// This allow me to avoid a lot of other cast and checks
|
|
RigidBodyBullet *bodyA = static_cast<RigidBodyBullet *>(contactManifold->getBody0()->getUserPointer());
|
|
RigidBodyBullet *bodyB = static_cast<RigidBodyBullet *>(contactManifold->getBody1()->getUserPointer());
|
|
|
|
if (CollisionObjectBullet::TYPE_RIGID_BODY == bodyA->getType() && CollisionObjectBullet::TYPE_RIGID_BODY == bodyB->getType()) {
|
|
if (!bodyA->can_add_collision() && !bodyB->can_add_collision()) {
|
|
continue;
|
|
}
|
|
|
|
const int numContacts = contactManifold->getNumContacts();
|
|
|
|
/// Since I don't need report all contacts for these objects,
|
|
/// So report only the first
|
|
#define REPORT_ALL_CONTACTS 0
|
|
#if REPORT_ALL_CONTACTS
|
|
for (int j = 0; j < numContacts; j++) {
|
|
btManifoldPoint &pt = contactManifold->getContactPoint(j);
|
|
#else
|
|
if (numContacts) {
|
|
btManifoldPoint &pt = contactManifold->getContactPoint(0);
|
|
#endif
|
|
if (
|
|
pt.getDistance() <= 0.0 ||
|
|
bodyA->was_colliding(bodyB) ||
|
|
bodyB->was_colliding(bodyA)) {
|
|
|
|
Vector3 collisionWorldPosition;
|
|
Vector3 collisionLocalPosition;
|
|
Vector3 normalOnB;
|
|
float appliedImpulse = pt.m_appliedImpulse;
|
|
B_TO_G(pt.m_normalWorldOnB, normalOnB);
|
|
|
|
if (bodyA->can_add_collision()) {
|
|
B_TO_G(pt.getPositionWorldOnB(), collisionWorldPosition);
|
|
/// pt.m_localPointB Doesn't report the exact point in local space
|
|
B_TO_G(pt.getPositionWorldOnB() - contactManifold->getBody1()->getWorldTransform().getOrigin(), collisionLocalPosition);
|
|
bodyA->add_collision_object(bodyB, collisionWorldPosition, collisionLocalPosition, normalOnB, appliedImpulse, pt.m_index1, pt.m_index0);
|
|
}
|
|
if (bodyB->can_add_collision()) {
|
|
B_TO_G(pt.getPositionWorldOnA(), collisionWorldPosition);
|
|
/// pt.m_localPointA Doesn't report the exact point in local space
|
|
B_TO_G(pt.getPositionWorldOnA() - contactManifold->getBody0()->getWorldTransform().getOrigin(), collisionLocalPosition);
|
|
bodyB->add_collision_object(bodyA, collisionWorldPosition, collisionLocalPosition, normalOnB * -1, appliedImpulse * -1, pt.m_index0, pt.m_index1);
|
|
}
|
|
|
|
#ifdef DEBUG_ENABLED
|
|
if (is_debugging_contacts()) {
|
|
add_debug_contact(collisionWorldPosition);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void SpaceBullet::update_gravity() {
|
|
btVector3 btGravity;
|
|
G_TO_B(gravityDirection * gravityMagnitude, btGravity);
|
|
//dynamicsWorld->setGravity(btGravity);
|
|
dynamicsWorld->setGravity(btVector3(0, 0, 0));
|
|
if (soft_body_world_info) {
|
|
soft_body_world_info->m_gravity = btGravity;
|
|
}
|
|
}
|
|
|
|
/// IMPORTANT: Please don't turn it ON this is not managed correctly!!
|
|
/// I'm leaving this here just for future tests.
|
|
/// Debug motion and normal vector drawing
|
|
#define debug_test_motion 0
|
|
|
|
#define RECOVERING_MOVEMENT_SCALE 0.4
|
|
#define RECOVERING_MOVEMENT_CYCLES 4
|
|
|
|
#if debug_test_motion
|
|
|
|
#include "scene/3d/immediate_geometry.h"
|
|
|
|
static ImmediateGeometry *motionVec(NULL);
|
|
static ImmediateGeometry *normalLine(NULL);
|
|
static Ref<SpatialMaterial> red_mat;
|
|
static Ref<SpatialMaterial> blue_mat;
|
|
#endif
|
|
|
|
bool SpaceBullet::test_body_motion(RigidBodyBullet *p_body, const Transform &p_from, const Vector3 &p_motion, bool p_infinite_inertia, PhysicsServer::MotionResult *r_result, bool p_exclude_raycast_shapes) {
|
|
|
|
#if debug_test_motion
|
|
/// Yes I know this is not good, but I've used it as fast debugging hack.
|
|
/// I'm leaving it here just for speedup the other eventual debugs
|
|
if (!normalLine) {
|
|
motionVec = memnew(ImmediateGeometry);
|
|
normalLine = memnew(ImmediateGeometry);
|
|
SceneTree::get_singleton()->get_current_scene()->add_child(motionVec);
|
|
SceneTree::get_singleton()->get_current_scene()->add_child(normalLine);
|
|
|
|
motionVec->set_as_toplevel(true);
|
|
normalLine->set_as_toplevel(true);
|
|
|
|
red_mat = Ref<SpatialMaterial>(memnew(SpatialMaterial));
|
|
red_mat->set_flag(SpatialMaterial::FLAG_UNSHADED, true);
|
|
red_mat->set_line_width(20.0);
|
|
red_mat->set_feature(SpatialMaterial::FEATURE_TRANSPARENT, true);
|
|
red_mat->set_flag(SpatialMaterial::FLAG_ALBEDO_FROM_VERTEX_COLOR, true);
|
|
red_mat->set_flag(SpatialMaterial::FLAG_SRGB_VERTEX_COLOR, true);
|
|
red_mat->set_albedo(Color(1, 0, 0, 1));
|
|
motionVec->set_material_override(red_mat);
|
|
|
|
blue_mat = Ref<SpatialMaterial>(memnew(SpatialMaterial));
|
|
blue_mat->set_flag(SpatialMaterial::FLAG_UNSHADED, true);
|
|
blue_mat->set_line_width(20.0);
|
|
blue_mat->set_feature(SpatialMaterial::FEATURE_TRANSPARENT, true);
|
|
blue_mat->set_flag(SpatialMaterial::FLAG_ALBEDO_FROM_VERTEX_COLOR, true);
|
|
blue_mat->set_flag(SpatialMaterial::FLAG_SRGB_VERTEX_COLOR, true);
|
|
blue_mat->set_albedo(Color(0, 0, 1, 1));
|
|
normalLine->set_material_override(blue_mat);
|
|
}
|
|
#endif
|
|
|
|
btTransform body_transform;
|
|
G_TO_B(p_from, body_transform);
|
|
UNSCALE_BT_BASIS(body_transform);
|
|
|
|
btVector3 initial_recover_motion(0, 0, 0);
|
|
{ /// Phase one - multi shapes depenetration using margin
|
|
for (int t(RECOVERING_MOVEMENT_CYCLES); 0 < t; --t) {
|
|
if (!recover_from_penetration(p_body, body_transform, RECOVERING_MOVEMENT_SCALE, p_infinite_inertia, initial_recover_motion)) {
|
|
break;
|
|
}
|
|
}
|
|
// Add recover movement in order to make it safe
|
|
body_transform.getOrigin() += initial_recover_motion;
|
|
}
|
|
|
|
btVector3 motion;
|
|
G_TO_B(p_motion, motion);
|
|
if (!motion.fuzzyZero()) {
|
|
// Phase two - sweep test, from a secure position without margin
|
|
|
|
const int shape_count(p_body->get_shape_count());
|
|
|
|
#if debug_test_motion
|
|
Vector3 sup_line;
|
|
B_TO_G(body_safe_position.getOrigin(), sup_line);
|
|
motionVec->clear();
|
|
motionVec->begin(Mesh::PRIMITIVE_LINES, NULL);
|
|
motionVec->add_vertex(sup_line);
|
|
motionVec->add_vertex(sup_line + p_motion * 10);
|
|
motionVec->end();
|
|
#endif
|
|
|
|
for (int shIndex = 0; shIndex < shape_count; ++shIndex) {
|
|
if (p_body->is_shape_disabled(shIndex)) {
|
|
continue;
|
|
}
|
|
|
|
if (!p_body->get_bt_shape(shIndex)->isConvex()) {
|
|
// Skip no convex shape
|
|
continue;
|
|
}
|
|
|
|
if (p_exclude_raycast_shapes && p_body->get_bt_shape(shIndex)->getShapeType() == CUSTOM_CONVEX_SHAPE_TYPE) {
|
|
// Skip rayshape in order to implement custom separation process
|
|
continue;
|
|
}
|
|
|
|
btConvexShape *convex_shape_test(static_cast<btConvexShape *>(p_body->get_bt_shape(shIndex)));
|
|
|
|
btTransform shape_world_from = body_transform * p_body->get_kinematic_utilities()->shapes[shIndex].transform;
|
|
|
|
btTransform shape_world_to(shape_world_from);
|
|
shape_world_to.getOrigin() += motion;
|
|
|
|
GodotKinClosestConvexResultCallback btResult(shape_world_from.getOrigin(), shape_world_to.getOrigin(), p_body, p_infinite_inertia);
|
|
btResult.m_collisionFilterGroup = p_body->get_collision_layer();
|
|
btResult.m_collisionFilterMask = p_body->get_collision_mask();
|
|
|
|
dynamicsWorld->convexSweepTest(convex_shape_test, shape_world_from, shape_world_to, btResult, dynamicsWorld->getDispatchInfo().m_allowedCcdPenetration);
|
|
|
|
if (btResult.hasHit()) {
|
|
/// Since for each sweep test I fix the motion of new shapes in base the recover result,
|
|
/// if another shape will hit something it means that has a deepest penetration respect the previous shape
|
|
motion *= btResult.m_closestHitFraction;
|
|
}
|
|
}
|
|
|
|
body_transform.getOrigin() += motion;
|
|
}
|
|
|
|
bool has_penetration = false;
|
|
|
|
{ /// Phase three - contact test with margin
|
|
|
|
btVector3 __rec(0, 0, 0);
|
|
RecoverResult r_recover_result;
|
|
|
|
has_penetration = recover_from_penetration(p_body, body_transform, 1, p_infinite_inertia, __rec, &r_recover_result);
|
|
|
|
// Parse results
|
|
if (r_result) {
|
|
B_TO_G(motion + initial_recover_motion + __rec, r_result->motion);
|
|
|
|
if (has_penetration) {
|
|
|
|
const btRigidBody *btRigid = static_cast<const btRigidBody *>(r_recover_result.other_collision_object);
|
|
CollisionObjectBullet *collisionObject = static_cast<CollisionObjectBullet *>(btRigid->getUserPointer());
|
|
|
|
B_TO_G(motion, r_result->remainder); // is the remaining movements
|
|
r_result->remainder = p_motion - r_result->remainder;
|
|
|
|
B_TO_G(r_recover_result.pointWorld, r_result->collision_point);
|
|
B_TO_G(r_recover_result.normal, r_result->collision_normal);
|
|
B_TO_G(btRigid->getVelocityInLocalPoint(r_recover_result.pointWorld - btRigid->getWorldTransform().getOrigin()), r_result->collider_velocity); // It calculates velocity at point and assign it using special function Bullet_to_Godot
|
|
r_result->collider = collisionObject->get_self();
|
|
r_result->collider_id = collisionObject->get_instance_id();
|
|
r_result->collider_shape = r_recover_result.other_compound_shape_index;
|
|
r_result->collision_local_shape = r_recover_result.local_shape_most_recovered;
|
|
|
|
#if debug_test_motion
|
|
Vector3 sup_line2;
|
|
B_TO_G(motion, sup_line2);
|
|
normalLine->clear();
|
|
normalLine->begin(Mesh::PRIMITIVE_LINES, NULL);
|
|
normalLine->add_vertex(r_result->collision_point);
|
|
normalLine->add_vertex(r_result->collision_point + r_result->collision_normal * 10);
|
|
normalLine->end();
|
|
#endif
|
|
} else {
|
|
r_result->remainder = Vector3();
|
|
}
|
|
}
|
|
}
|
|
|
|
return has_penetration;
|
|
}
|
|
|
|
int SpaceBullet::test_ray_separation(RigidBodyBullet *p_body, const Transform &p_transform, bool p_infinite_inertia, Vector3 &r_recover_motion, PhysicsServer::SeparationResult *r_results, int p_result_max, float p_margin) {
|
|
|
|
btTransform body_transform;
|
|
G_TO_B(p_transform, body_transform);
|
|
UNSCALE_BT_BASIS(body_transform);
|
|
|
|
btVector3 recover_motion(0, 0, 0);
|
|
|
|
int rays_found = 0;
|
|
int rays_found_this_round = 0;
|
|
|
|
for (int t(RECOVERING_MOVEMENT_CYCLES); 0 < t; --t) {
|
|
PhysicsServer::SeparationResult *next_results = &r_results[rays_found];
|
|
rays_found_this_round = recover_from_penetration_ray(p_body, body_transform, RECOVERING_MOVEMENT_SCALE, p_infinite_inertia, p_result_max - rays_found, recover_motion, next_results);
|
|
|
|
rays_found += rays_found_this_round;
|
|
if (rays_found_this_round == 0) {
|
|
body_transform.getOrigin() += recover_motion;
|
|
break;
|
|
}
|
|
}
|
|
|
|
B_TO_G(recover_motion, r_recover_motion);
|
|
return rays_found;
|
|
}
|
|
|
|
struct RecoverPenetrationBroadPhaseCallback : public btBroadphaseAabbCallback {
|
|
private:
|
|
btDbvtVolume bounds;
|
|
|
|
const btCollisionObject *self_collision_object;
|
|
uint32_t collision_layer;
|
|
uint32_t collision_mask;
|
|
|
|
struct CompoundLeafCallback : btDbvt::ICollide {
|
|
private:
|
|
RecoverPenetrationBroadPhaseCallback *parent_callback;
|
|
btCollisionObject *collision_object;
|
|
|
|
public:
|
|
CompoundLeafCallback(RecoverPenetrationBroadPhaseCallback *p_parent_callback, btCollisionObject *p_collision_object) :
|
|
parent_callback(p_parent_callback),
|
|
collision_object(p_collision_object) {
|
|
}
|
|
|
|
void Process(const btDbvtNode *leaf) {
|
|
BroadphaseResult result;
|
|
result.collision_object = collision_object;
|
|
result.compound_child_index = leaf->dataAsInt;
|
|
parent_callback->results.push_back(result);
|
|
}
|
|
};
|
|
|
|
public:
|
|
struct BroadphaseResult {
|
|
btCollisionObject *collision_object;
|
|
int compound_child_index;
|
|
};
|
|
|
|
Vector<BroadphaseResult> results;
|
|
|
|
public:
|
|
RecoverPenetrationBroadPhaseCallback(const btCollisionObject *p_self_collision_object, uint32_t p_collision_layer, uint32_t p_collision_mask, btVector3 p_aabb_min, btVector3 p_aabb_max) :
|
|
self_collision_object(p_self_collision_object),
|
|
collision_layer(p_collision_layer),
|
|
collision_mask(p_collision_mask) {
|
|
|
|
bounds = btDbvtVolume::FromMM(p_aabb_min, p_aabb_max);
|
|
}
|
|
|
|
virtual ~RecoverPenetrationBroadPhaseCallback() {}
|
|
|
|
virtual bool process(const btBroadphaseProxy *proxy) {
|
|
|
|
btCollisionObject *co = static_cast<btCollisionObject *>(proxy->m_clientObject);
|
|
if (co->getInternalType() <= btCollisionObject::CO_RIGID_BODY) {
|
|
if (self_collision_object != proxy->m_clientObject && GodotFilterCallback::test_collision_filters(collision_layer, collision_mask, proxy->m_collisionFilterGroup, proxy->m_collisionFilterMask)) {
|
|
if (co->getCollisionShape()->isCompound()) {
|
|
const btCompoundShape *cs = static_cast<btCompoundShape *>(co->getCollisionShape());
|
|
|
|
if (cs->getNumChildShapes() > 1) {
|
|
const btDbvt *tree = cs->getDynamicAabbTree();
|
|
ERR_FAIL_COND_V(tree == NULL, true);
|
|
|
|
// Transform bounds into compound shape local space
|
|
const btTransform other_in_compound_space = co->getWorldTransform().inverse();
|
|
const btMatrix3x3 abs_b = other_in_compound_space.getBasis().absolute();
|
|
const btVector3 local_center = other_in_compound_space(bounds.Center());
|
|
const btVector3 local_extent = bounds.Extents().dot3(abs_b[0], abs_b[1], abs_b[2]);
|
|
const btVector3 local_aabb_min = local_center - local_extent;
|
|
const btVector3 local_aabb_max = local_center + local_extent;
|
|
const btDbvtVolume local_bounds = btDbvtVolume::FromMM(local_aabb_min, local_aabb_max);
|
|
|
|
// Test collision against compound child shapes using its AABB tree
|
|
CompoundLeafCallback compound_leaf_callback(this, co);
|
|
tree->collideTV(tree->m_root, local_bounds, compound_leaf_callback);
|
|
} else {
|
|
// If there's only a single child shape then there's no need to search any more, we know which child overlaps
|
|
BroadphaseResult result;
|
|
result.collision_object = co;
|
|
result.compound_child_index = 0;
|
|
results.push_back(result);
|
|
}
|
|
} else {
|
|
BroadphaseResult result;
|
|
result.collision_object = co;
|
|
result.compound_child_index = -1;
|
|
results.push_back(result);
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
};
|
|
|
|
bool SpaceBullet::recover_from_penetration(RigidBodyBullet *p_body, const btTransform &p_body_position, btScalar p_recover_movement_scale, bool p_infinite_inertia, btVector3 &r_delta_recover_movement, RecoverResult *r_recover_result) {
|
|
|
|
// Calculate the cumulative AABB of all shapes of the kinematic body
|
|
btVector3 aabb_min, aabb_max;
|
|
bool shapes_found = false;
|
|
|
|
for (int kinIndex = p_body->get_kinematic_utilities()->shapes.size() - 1; 0 <= kinIndex; --kinIndex) {
|
|
|
|
const RigidBodyBullet::KinematicShape &kin_shape(p_body->get_kinematic_utilities()->shapes[kinIndex]);
|
|
if (!kin_shape.is_active()) {
|
|
continue;
|
|
}
|
|
|
|
if (kin_shape.shape->getShapeType() == CUSTOM_CONVEX_SHAPE_TYPE) {
|
|
// Skip rayshape in order to implement custom separation process
|
|
continue;
|
|
}
|
|
|
|
btTransform shape_transform = p_body_position * kin_shape.transform;
|
|
shape_transform.getOrigin() += r_delta_recover_movement;
|
|
|
|
btVector3 shape_aabb_min, shape_aabb_max;
|
|
kin_shape.shape->getAabb(shape_transform, shape_aabb_min, shape_aabb_max);
|
|
|
|
if (!shapes_found) {
|
|
aabb_min = shape_aabb_min;
|
|
aabb_max = shape_aabb_max;
|
|
shapes_found = true;
|
|
} else {
|
|
aabb_min.setX((aabb_min.x() < shape_aabb_min.x()) ? aabb_min.x() : shape_aabb_min.x());
|
|
aabb_min.setY((aabb_min.y() < shape_aabb_min.y()) ? aabb_min.y() : shape_aabb_min.y());
|
|
aabb_min.setZ((aabb_min.z() < shape_aabb_min.z()) ? aabb_min.z() : shape_aabb_min.z());
|
|
|
|
aabb_max.setX((aabb_max.x() > shape_aabb_max.x()) ? aabb_max.x() : shape_aabb_max.x());
|
|
aabb_max.setY((aabb_max.y() > shape_aabb_max.y()) ? aabb_max.y() : shape_aabb_max.y());
|
|
aabb_max.setZ((aabb_max.z() > shape_aabb_max.z()) ? aabb_max.z() : shape_aabb_max.z());
|
|
}
|
|
}
|
|
|
|
// If there are no shapes then there is no penetration either
|
|
if (!shapes_found) {
|
|
return false;
|
|
}
|
|
|
|
// Perform broadphase test
|
|
RecoverPenetrationBroadPhaseCallback recover_broad_result(p_body->get_bt_collision_object(), p_body->get_collision_layer(), p_body->get_collision_mask(), aabb_min, aabb_max);
|
|
dynamicsWorld->getBroadphase()->aabbTest(aabb_min, aabb_max, recover_broad_result);
|
|
|
|
bool penetration = false;
|
|
|
|
// Perform narrowphase per shape
|
|
for (int kinIndex = p_body->get_kinematic_utilities()->shapes.size() - 1; 0 <= kinIndex; --kinIndex) {
|
|
|
|
const RigidBodyBullet::KinematicShape &kin_shape(p_body->get_kinematic_utilities()->shapes[kinIndex]);
|
|
if (!kin_shape.is_active()) {
|
|
continue;
|
|
}
|
|
|
|
if (kin_shape.shape->getShapeType() == CUSTOM_CONVEX_SHAPE_TYPE) {
|
|
// Skip rayshape in order to implement custom separation process
|
|
continue;
|
|
}
|
|
|
|
btTransform shape_transform = p_body_position * kin_shape.transform;
|
|
shape_transform.getOrigin() += r_delta_recover_movement;
|
|
|
|
for (int i = recover_broad_result.results.size() - 1; 0 <= i; --i) {
|
|
btCollisionObject *otherObject = recover_broad_result.results[i].collision_object;
|
|
if (p_infinite_inertia && !otherObject->isStaticOrKinematicObject()) {
|
|
otherObject->activate(); // Force activation of hitten rigid, soft body
|
|
continue;
|
|
} else if (!p_body->get_bt_collision_object()->checkCollideWith(otherObject) || !otherObject->checkCollideWith(p_body->get_bt_collision_object()))
|
|
continue;
|
|
|
|
if (otherObject->getCollisionShape()->isCompound()) {
|
|
const btCompoundShape *cs = static_cast<const btCompoundShape *>(otherObject->getCollisionShape());
|
|
int shape_idx = recover_broad_result.results[i].compound_child_index;
|
|
ERR_FAIL_COND_V(shape_idx < 0 || shape_idx >= cs->getNumChildShapes(), false);
|
|
|
|
if (cs->getChildShape(shape_idx)->isConvex()) {
|
|
if (RFP_convex_convex_test(kin_shape.shape, static_cast<const btConvexShape *>(cs->getChildShape(shape_idx)), otherObject, kinIndex, shape_idx, shape_transform, otherObject->getWorldTransform() * cs->getChildTransform(shape_idx), p_recover_movement_scale, r_delta_recover_movement, r_recover_result)) {
|
|
|
|
penetration = true;
|
|
}
|
|
} else {
|
|
if (RFP_convex_world_test(kin_shape.shape, cs->getChildShape(shape_idx), p_body->get_bt_collision_object(), otherObject, kinIndex, shape_idx, shape_transform, otherObject->getWorldTransform() * cs->getChildTransform(shape_idx), p_recover_movement_scale, r_delta_recover_movement, r_recover_result)) {
|
|
|
|
penetration = true;
|
|
}
|
|
}
|
|
} else if (otherObject->getCollisionShape()->isConvex()) { /// Execute GJK test against object shape
|
|
if (RFP_convex_convex_test(kin_shape.shape, static_cast<const btConvexShape *>(otherObject->getCollisionShape()), otherObject, kinIndex, 0, shape_transform, otherObject->getWorldTransform(), p_recover_movement_scale, r_delta_recover_movement, r_recover_result)) {
|
|
|
|
penetration = true;
|
|
}
|
|
} else {
|
|
if (RFP_convex_world_test(kin_shape.shape, otherObject->getCollisionShape(), p_body->get_bt_collision_object(), otherObject, kinIndex, 0, shape_transform, otherObject->getWorldTransform(), p_recover_movement_scale, r_delta_recover_movement, r_recover_result)) {
|
|
|
|
penetration = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return penetration;
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|
}
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|
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|
bool SpaceBullet::RFP_convex_convex_test(const btConvexShape *p_shapeA, const btConvexShape *p_shapeB, btCollisionObject *p_objectB, int p_shapeId_A, int p_shapeId_B, const btTransform &p_transformA, const btTransform &p_transformB, btScalar p_recover_movement_scale, btVector3 &r_delta_recover_movement, RecoverResult *r_recover_result) {
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|
|
|
// Initialize GJK input
|
|
btGjkPairDetector::ClosestPointInput gjk_input;
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|
gjk_input.m_transformA = p_transformA;
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|
gjk_input.m_transformB = p_transformB;
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|
|
|
// Perform GJK test
|
|
btPointCollector result;
|
|
btGjkPairDetector gjk_pair_detector(p_shapeA, p_shapeB, gjk_simplex_solver, gjk_epa_pen_solver);
|
|
gjk_pair_detector.getClosestPoints(gjk_input, result, 0);
|
|
if (0 > result.m_distance) {
|
|
// Has penetration
|
|
r_delta_recover_movement += result.m_normalOnBInWorld * (result.m_distance * -1 * p_recover_movement_scale);
|
|
|
|
if (r_recover_result) {
|
|
if (result.m_distance < r_recover_result->penetration_distance) {
|
|
r_recover_result->hasPenetration = true;
|
|
r_recover_result->local_shape_most_recovered = p_shapeId_A;
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|
r_recover_result->other_collision_object = p_objectB;
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|
r_recover_result->other_compound_shape_index = p_shapeId_B;
|
|
r_recover_result->penetration_distance = result.m_distance;
|
|
r_recover_result->pointWorld = result.m_pointInWorld;
|
|
r_recover_result->normal = result.m_normalOnBInWorld;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool SpaceBullet::RFP_convex_world_test(const btConvexShape *p_shapeA, const btCollisionShape *p_shapeB, btCollisionObject *p_objectA, btCollisionObject *p_objectB, int p_shapeId_A, int p_shapeId_B, const btTransform &p_transformA, const btTransform &p_transformB, btScalar p_recover_movement_scale, btVector3 &r_delta_recover_movement, RecoverResult *r_recover_result) {
|
|
|
|
/// Contact test
|
|
|
|
btTransform tA(p_transformA);
|
|
|
|
btCollisionObjectWrapper obA(NULL, p_shapeA, p_objectA, tA, -1, p_shapeId_A);
|
|
btCollisionObjectWrapper obB(NULL, p_shapeB, p_objectB, p_transformB, -1, p_shapeId_B);
|
|
|
|
btCollisionAlgorithm *algorithm = dispatcher->findAlgorithm(&obA, &obB, NULL, BT_CONTACT_POINT_ALGORITHMS);
|
|
if (algorithm) {
|
|
GodotDeepPenetrationContactResultCallback contactPointResult(&obA, &obB);
|
|
//discrete collision detection query
|
|
algorithm->processCollision(&obA, &obB, dynamicsWorld->getDispatchInfo(), &contactPointResult);
|
|
|
|
algorithm->~btCollisionAlgorithm();
|
|
dispatcher->freeCollisionAlgorithm(algorithm);
|
|
|
|
if (contactPointResult.hasHit()) {
|
|
r_delta_recover_movement += contactPointResult.m_pointNormalWorld * (contactPointResult.m_penetration_distance * -1 * p_recover_movement_scale);
|
|
if (r_recover_result) {
|
|
if (contactPointResult.m_penetration_distance < r_recover_result->penetration_distance) {
|
|
r_recover_result->hasPenetration = true;
|
|
r_recover_result->local_shape_most_recovered = p_shapeId_A;
|
|
r_recover_result->other_collision_object = p_objectB;
|
|
r_recover_result->other_compound_shape_index = p_shapeId_B;
|
|
r_recover_result->penetration_distance = contactPointResult.m_penetration_distance;
|
|
r_recover_result->pointWorld = contactPointResult.m_pointWorld;
|
|
r_recover_result->normal = contactPointResult.m_pointNormalWorld;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
int SpaceBullet::add_separation_result(PhysicsServer::SeparationResult *r_result, const SpaceBullet::RecoverResult &p_recover_result, int p_shape_id, const btCollisionObject *p_other_object) const {
|
|
|
|
// optimize results (ignore non-colliding)
|
|
if (p_recover_result.penetration_distance < 0.0) {
|
|
const btRigidBody *btRigid = static_cast<const btRigidBody *>(p_other_object);
|
|
CollisionObjectBullet *collisionObject = static_cast<CollisionObjectBullet *>(p_other_object->getUserPointer());
|
|
|
|
r_result->collision_depth = p_recover_result.penetration_distance;
|
|
B_TO_G(p_recover_result.pointWorld, r_result->collision_point);
|
|
B_TO_G(p_recover_result.normal, r_result->collision_normal);
|
|
B_TO_G(btRigid->getVelocityInLocalPoint(p_recover_result.pointWorld - btRigid->getWorldTransform().getOrigin()), r_result->collider_velocity);
|
|
r_result->collision_local_shape = p_shape_id;
|
|
r_result->collider_id = collisionObject->get_instance_id();
|
|
r_result->collider = collisionObject->get_self();
|
|
r_result->collider_shape = p_recover_result.other_compound_shape_index;
|
|
|
|
return 1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int SpaceBullet::recover_from_penetration_ray(RigidBodyBullet *p_body, const btTransform &p_body_position, btScalar p_recover_movement_scale, bool p_infinite_inertia, int p_result_max, btVector3 &r_delta_recover_movement, PhysicsServer::SeparationResult *r_results) {
|
|
|
|
// Calculate the cumulative AABB of all shapes of the kinematic body
|
|
btVector3 aabb_min, aabb_max;
|
|
bool shapes_found = false;
|
|
|
|
for (int kinIndex = p_body->get_kinematic_utilities()->shapes.size() - 1; 0 <= kinIndex; --kinIndex) {
|
|
|
|
const RigidBodyBullet::KinematicShape &kin_shape(p_body->get_kinematic_utilities()->shapes[kinIndex]);
|
|
if (!kin_shape.is_active()) {
|
|
continue;
|
|
}
|
|
|
|
if (kin_shape.shape->getShapeType() != CUSTOM_CONVEX_SHAPE_TYPE) {
|
|
continue;
|
|
}
|
|
|
|
btTransform shape_transform = p_body_position * kin_shape.transform;
|
|
shape_transform.getOrigin() += r_delta_recover_movement;
|
|
|
|
btVector3 shape_aabb_min, shape_aabb_max;
|
|
kin_shape.shape->getAabb(shape_transform, shape_aabb_min, shape_aabb_max);
|
|
|
|
if (!shapes_found) {
|
|
aabb_min = shape_aabb_min;
|
|
aabb_max = shape_aabb_max;
|
|
shapes_found = true;
|
|
} else {
|
|
aabb_min.setX((aabb_min.x() < shape_aabb_min.x()) ? aabb_min.x() : shape_aabb_min.x());
|
|
aabb_min.setY((aabb_min.y() < shape_aabb_min.y()) ? aabb_min.y() : shape_aabb_min.y());
|
|
aabb_min.setZ((aabb_min.z() < shape_aabb_min.z()) ? aabb_min.z() : shape_aabb_min.z());
|
|
|
|
aabb_max.setX((aabb_max.x() > shape_aabb_max.x()) ? aabb_max.x() : shape_aabb_max.x());
|
|
aabb_max.setY((aabb_max.y() > shape_aabb_max.y()) ? aabb_max.y() : shape_aabb_max.y());
|
|
aabb_max.setZ((aabb_max.z() > shape_aabb_max.z()) ? aabb_max.z() : shape_aabb_max.z());
|
|
}
|
|
}
|
|
|
|
// If there are no shapes then there is no penetration either
|
|
if (!shapes_found) {
|
|
return 0;
|
|
}
|
|
|
|
// Perform broadphase test
|
|
RecoverPenetrationBroadPhaseCallback recover_broad_result(p_body->get_bt_collision_object(), p_body->get_collision_layer(), p_body->get_collision_mask(), aabb_min, aabb_max);
|
|
dynamicsWorld->getBroadphase()->aabbTest(aabb_min, aabb_max, recover_broad_result);
|
|
|
|
int ray_count = 0;
|
|
|
|
// Perform narrowphase per shape
|
|
for (int kinIndex = p_body->get_kinematic_utilities()->shapes.size() - 1; 0 <= kinIndex; --kinIndex) {
|
|
|
|
if (ray_count >= p_result_max) {
|
|
break;
|
|
}
|
|
|
|
const RigidBodyBullet::KinematicShape &kin_shape(p_body->get_kinematic_utilities()->shapes[kinIndex]);
|
|
if (!kin_shape.is_active()) {
|
|
continue;
|
|
}
|
|
|
|
if (kin_shape.shape->getShapeType() != CUSTOM_CONVEX_SHAPE_TYPE) {
|
|
continue;
|
|
}
|
|
|
|
btTransform shape_transform = p_body_position * kin_shape.transform;
|
|
shape_transform.getOrigin() += r_delta_recover_movement;
|
|
|
|
for (int i = recover_broad_result.results.size() - 1; 0 <= i; --i) {
|
|
btCollisionObject *otherObject = recover_broad_result.results[i].collision_object;
|
|
if (p_infinite_inertia && !otherObject->isStaticOrKinematicObject()) {
|
|
otherObject->activate(); // Force activation of hitten rigid, soft body
|
|
continue;
|
|
} else if (!p_body->get_bt_collision_object()->checkCollideWith(otherObject) || !otherObject->checkCollideWith(p_body->get_bt_collision_object()))
|
|
continue;
|
|
|
|
if (otherObject->getCollisionShape()->isCompound()) {
|
|
const btCompoundShape *cs = static_cast<const btCompoundShape *>(otherObject->getCollisionShape());
|
|
int shape_idx = recover_broad_result.results[i].compound_child_index;
|
|
ERR_FAIL_COND_V(shape_idx < 0 || shape_idx >= cs->getNumChildShapes(), false);
|
|
|
|
RecoverResult recover_result;
|
|
if (RFP_convex_world_test(kin_shape.shape, cs->getChildShape(shape_idx), p_body->get_bt_collision_object(), otherObject, kinIndex, shape_idx, shape_transform, otherObject->getWorldTransform() * cs->getChildTransform(shape_idx), p_recover_movement_scale, r_delta_recover_movement, &recover_result)) {
|
|
|
|
ray_count = add_separation_result(&r_results[ray_count], recover_result, kinIndex, otherObject);
|
|
}
|
|
} else {
|
|
|
|
RecoverResult recover_result;
|
|
if (RFP_convex_world_test(kin_shape.shape, otherObject->getCollisionShape(), p_body->get_bt_collision_object(), otherObject, kinIndex, 0, shape_transform, otherObject->getWorldTransform(), p_recover_movement_scale, r_delta_recover_movement, &recover_result)) {
|
|
|
|
ray_count = add_separation_result(&r_results[ray_count], recover_result, kinIndex, otherObject);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return ray_count;
|
|
}
|