211dc8cd2d
This PR adds a define BVH_EXPAND_LEAF_AABBS which is set, which stores expanded AABBs in the tree instead of exact AABBs. This makes the logic less error prone when considering reciprocal collisions in the pairing, as all collision detect is now taking place between expanded AABB against expanded AABB, rather than expanded AABB against exact AABB. The flip side of this is that the intersection tests will now be less exact when expanded margins are set. All margins are now user customizable via project settings, and take account of collision pairing density to adjust the margin dynamically.
137 lines
6 KiB
C++
137 lines
6 KiB
C++
/*************************************************************************/
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/* broad_phase_bvh.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) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 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 "broad_phase_bvh.h"
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#include "collision_object_sw.h"
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#include "core/project_settings.h"
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BroadPhaseSW::ID BroadPhaseBVH::create(CollisionObjectSW *p_object, int p_subindex, const AABB &p_aabb, bool p_static) {
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ID oid = bvh.create(p_object, true, p_aabb, p_subindex, !p_static, 1 << p_object->get_type(), p_static ? 0 : 0xFFFFF); // Pair everything, don't care?
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return oid + 1;
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}
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void BroadPhaseBVH::move(ID p_id, const AABB &p_aabb) {
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bvh.move(p_id - 1, p_aabb);
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}
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void BroadPhaseBVH::recheck_pairs(ID p_id) {
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bvh.recheck_pairs(p_id - 1);
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}
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void BroadPhaseBVH::set_static(ID p_id, bool p_static) {
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CollisionObjectSW *it = bvh.get(p_id - 1);
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bvh.set_pairable(p_id - 1, !p_static, 1 << it->get_type(), p_static ? 0 : 0xFFFFF, false); // Pair everything, don't care?
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}
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void BroadPhaseBVH::remove(ID p_id) {
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bvh.erase(p_id - 1);
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}
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CollisionObjectSW *BroadPhaseBVH::get_object(ID p_id) const {
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CollisionObjectSW *it = bvh.get(p_id - 1);
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ERR_FAIL_COND_V(!it, nullptr);
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return it;
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}
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bool BroadPhaseBVH::is_static(ID p_id) const {
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return !bvh.is_pairable(p_id - 1);
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}
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int BroadPhaseBVH::get_subindex(ID p_id) const {
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return bvh.get_subindex(p_id - 1);
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}
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int BroadPhaseBVH::cull_point(const Vector3 &p_point, CollisionObjectSW **p_results, int p_max_results, int *p_result_indices) {
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return bvh.cull_point(p_point, p_results, p_max_results, p_result_indices);
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}
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int BroadPhaseBVH::cull_segment(const Vector3 &p_from, const Vector3 &p_to, CollisionObjectSW **p_results, int p_max_results, int *p_result_indices) {
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return bvh.cull_segment(p_from, p_to, p_results, p_max_results, p_result_indices);
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}
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int BroadPhaseBVH::cull_aabb(const AABB &p_aabb, CollisionObjectSW **p_results, int p_max_results, int *p_result_indices) {
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return bvh.cull_aabb(p_aabb, p_results, p_max_results, p_result_indices);
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}
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void *BroadPhaseBVH::_pair_callback(void *p_self, uint32_t p_id_A, CollisionObjectSW *p_object_A, int p_subindex_A, uint32_t p_id_B, CollisionObjectSW *p_object_B, int p_subindex_B) {
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BroadPhaseBVH *bpo = (BroadPhaseBVH *)(p_self);
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if (!bpo->pair_callback) {
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return nullptr;
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}
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return bpo->pair_callback(p_object_A, p_subindex_A, p_object_B, p_subindex_B, nullptr, bpo->pair_userdata);
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}
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void BroadPhaseBVH::_unpair_callback(void *p_self, uint32_t p_id_A, CollisionObjectSW *p_object_A, int p_subindex_A, uint32_t p_id_B, CollisionObjectSW *p_object_B, int p_subindex_B, void *p_pair_data) {
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BroadPhaseBVH *bpo = (BroadPhaseBVH *)(p_self);
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if (!bpo->unpair_callback) {
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return;
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}
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bpo->unpair_callback(p_object_A, p_subindex_A, p_object_B, p_subindex_B, p_pair_data, bpo->unpair_userdata);
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}
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void *BroadPhaseBVH::_check_pair_callback(void *p_self, uint32_t p_id_A, CollisionObjectSW *p_object_A, int p_subindex_A, uint32_t p_id_B, CollisionObjectSW *p_object_B, int p_subindex_B, void *p_pair_data) {
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BroadPhaseBVH *bpo = (BroadPhaseBVH *)(p_self);
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if (!bpo->pair_callback) {
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return nullptr;
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}
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return bpo->pair_callback(p_object_A, p_subindex_A, p_object_B, p_subindex_B, p_pair_data, bpo->pair_userdata);
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}
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void BroadPhaseBVH::set_pair_callback(PairCallback p_pair_callback, void *p_userdata) {
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pair_callback = p_pair_callback;
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pair_userdata = p_userdata;
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}
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void BroadPhaseBVH::set_unpair_callback(UnpairCallback p_unpair_callback, void *p_userdata) {
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unpair_callback = p_unpair_callback;
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unpair_userdata = p_userdata;
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}
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void BroadPhaseBVH::update() {
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bvh.update();
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}
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BroadPhaseSW *BroadPhaseBVH::_create() {
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return memnew(BroadPhaseBVH);
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}
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BroadPhaseBVH::BroadPhaseBVH() {
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bvh.params_set_thread_safe(GLOBAL_GET("rendering/threads/thread_safe_bvh"));
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bvh.params_set_pairing_expansion(GLOBAL_GET("physics/3d/godot_physics/bvh_collision_margin"));
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bvh.set_pair_callback(_pair_callback, this);
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bvh.set_unpair_callback(_unpair_callback, this);
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bvh.set_check_pair_callback(_check_pair_callback, this);
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pair_callback = nullptr;
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pair_userdata = nullptr;
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unpair_userdata = nullptr;
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}
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