1426cd3b3a
As many open source projects have started doing it, we're removing the current year from the copyright notice, so that we don't need to bump it every year. It seems like only the first year of publication is technically relevant for copyright notices, and even that seems to be something that many companies stopped listing altogether (in a version controlled codebase, the commits are a much better source of date of publication than a hardcoded copyright statement). We also now list Godot Engine contributors first as we're collectively the current maintainers of the project, and we clarify that the "exclusive" copyright of the co-founders covers the timespan before opensourcing (their further contributions are included as part of Godot Engine contributors). Also fixed "cf." Frenchism - it's meant as "refer to / see". Backported from #70885.
351 lines
12 KiB
C++
351 lines
12 KiB
C++
/**************************************************************************/
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/* collision_polygon_2d.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) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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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 "collision_polygon_2d.h"
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#include "collision_object_2d.h"
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#include "core/engine.h"
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#include "scene/2d/area_2d.h"
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#include "scene/resources/concave_polygon_shape_2d.h"
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#include "scene/resources/convex_polygon_shape_2d.h"
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#include "thirdparty/misc/triangulator.h"
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void CollisionPolygon2D::_build_polygon() {
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parent->shape_owner_clear_shapes(owner_id);
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bool solids = build_mode == BUILD_SOLIDS;
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if (solids) {
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if (polygon.size() < 3) {
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return;
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}
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//here comes the sun, lalalala
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//decompose concave into multiple convex polygons and add them
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Vector<Vector<Vector2>> decomp = _decompose_in_convex();
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for (int i = 0; i < decomp.size(); i++) {
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Ref<ConvexPolygonShape2D> convex = memnew(ConvexPolygonShape2D);
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convex->set_points(decomp[i]);
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parent->shape_owner_add_shape(owner_id, convex);
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}
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} else {
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if (polygon.size() < 2) {
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return;
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}
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Ref<ConcavePolygonShape2D> concave = memnew(ConcavePolygonShape2D);
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PoolVector<Vector2> segments;
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segments.resize(polygon.size() * 2);
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PoolVector<Vector2>::Write w = segments.write();
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int polygon_count = polygon.size();
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for (int i = 0; i < polygon_count; i++) {
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w[(i << 1) + 0] = polygon[i];
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w[(i << 1) + 1] = polygon[(i + 1) % polygon_count];
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}
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w.release();
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concave->set_segments(segments);
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parent->shape_owner_add_shape(owner_id, concave);
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}
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}
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Vector<Vector<Vector2>> CollisionPolygon2D::_decompose_in_convex() {
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Vector<Vector<Vector2>> decomp = Geometry::decompose_polygon_in_convex(polygon);
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return decomp;
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}
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void CollisionPolygon2D::_update_in_shape_owner(bool p_xform_only) {
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parent->shape_owner_set_transform(owner_id, get_transform());
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if (p_xform_only) {
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return;
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}
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parent->shape_owner_set_disabled(owner_id, disabled);
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parent->shape_owner_set_one_way_collision(owner_id, one_way_collision);
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parent->shape_owner_set_one_way_collision_margin(owner_id, one_way_collision_margin);
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}
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void CollisionPolygon2D::_notification(int p_what) {
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switch (p_what) {
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case NOTIFICATION_PARENTED: {
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parent = Object::cast_to<CollisionObject2D>(get_parent());
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if (parent) {
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owner_id = parent->create_shape_owner(this);
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_build_polygon();
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_update_in_shape_owner();
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}
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/*if (Engine::get_singleton()->is_editor_hint()) {
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//display above all else
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set_z_as_relative(false);
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set_z_index(VS::CANVAS_ITEM_Z_MAX - 1);
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}*/
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} break;
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case NOTIFICATION_ENTER_TREE: {
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if (parent) {
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_update_in_shape_owner();
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}
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} break;
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case NOTIFICATION_LOCAL_TRANSFORM_CHANGED: {
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if (parent) {
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_update_in_shape_owner(true);
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}
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} break;
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case NOTIFICATION_UNPARENTED: {
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if (parent) {
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parent->remove_shape_owner(owner_id);
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}
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owner_id = 0;
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parent = nullptr;
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} break;
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case NOTIFICATION_DRAW: {
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ERR_FAIL_COND(!is_inside_tree());
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if (!Engine::get_singleton()->is_editor_hint() && !get_tree()->is_debugging_collisions_hint()) {
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break;
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}
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int polygon_count = polygon.size();
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for (int i = 0; i < polygon_count; i++) {
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Vector2 p = polygon[i];
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Vector2 n = polygon[(i + 1) % polygon_count];
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// draw line with width <= 1, so it does not scale with zoom and break pixel exact editing
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draw_line(p, n, Color(0.9, 0.2, 0.0, 0.8), 1);
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}
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if (polygon_count > 2) {
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#define DEBUG_DECOMPOSE
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#if defined(TOOLS_ENABLED) && defined(DEBUG_DECOMPOSE)
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Vector<Vector<Vector2>> decomp = _decompose_in_convex();
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Color c(0.4, 0.9, 0.1);
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for (int i = 0; i < decomp.size(); i++) {
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c.set_hsv(Math::fmod(c.get_h() + 0.738, 1), c.get_s(), c.get_v(), 0.5);
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draw_colored_polygon(decomp[i], c);
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}
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#else
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draw_colored_polygon(polygon, get_tree()->get_debug_collisions_color());
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#endif
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}
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if (one_way_collision) {
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Color dcol = get_tree()->get_debug_collisions_color(); //0.9,0.2,0.2,0.4);
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dcol.a = 1.0;
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Vector2 line_to(0, 20);
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draw_line(Vector2(), line_to, dcol, 3);
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Vector<Vector2> pts;
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float tsize = 8;
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pts.push_back(line_to + (Vector2(0, tsize)));
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pts.push_back(line_to + (Vector2(Math_SQRT12 * tsize, 0)));
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pts.push_back(line_to + (Vector2(-Math_SQRT12 * tsize, 0)));
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Vector<Color> cols;
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for (int i = 0; i < 3; i++) {
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cols.push_back(dcol);
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}
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draw_primitive(pts, cols, Vector<Vector2>()); //small arrow
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}
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} break;
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}
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}
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void CollisionPolygon2D::set_polygon(const Vector<Point2> &p_polygon) {
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polygon = p_polygon;
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{
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for (int i = 0; i < polygon.size(); i++) {
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if (i == 0) {
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aabb = Rect2(polygon[i], Size2());
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} else {
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aabb.expand_to(polygon[i]);
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}
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}
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if (aabb == Rect2()) {
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aabb = Rect2(-10, -10, 20, 20);
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} else {
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aabb.position -= aabb.size * 0.3;
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aabb.size += aabb.size * 0.6;
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}
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}
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if (parent) {
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_build_polygon();
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_update_in_shape_owner();
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}
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update();
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update_configuration_warning();
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}
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Vector<Point2> CollisionPolygon2D::get_polygon() const {
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return polygon;
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}
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void CollisionPolygon2D::set_build_mode(BuildMode p_mode) {
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ERR_FAIL_INDEX((int)p_mode, 2);
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build_mode = p_mode;
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if (parent) {
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_build_polygon();
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_update_in_shape_owner();
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}
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update();
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update_configuration_warning();
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}
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CollisionPolygon2D::BuildMode CollisionPolygon2D::get_build_mode() const {
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return build_mode;
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}
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#ifdef TOOLS_ENABLED
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Rect2 CollisionPolygon2D::_edit_get_rect() const {
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return aabb;
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}
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bool CollisionPolygon2D::_edit_use_rect() const {
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return true;
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}
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bool CollisionPolygon2D::_edit_is_selected_on_click(const Point2 &p_point, double p_tolerance) const {
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return Geometry::is_point_in_polygon(p_point, Variant(polygon));
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}
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#endif
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String CollisionPolygon2D::get_configuration_warning() const {
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String warning = Node2D::get_configuration_warning();
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if (!Object::cast_to<CollisionObject2D>(get_parent())) {
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if (warning != String()) {
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warning += "\n\n";
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}
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warning += TTR("CollisionPolygon2D only serves to provide a collision shape to a CollisionObject2D derived node. Please only use it as a child of Area2D, StaticBody2D, RigidBody2D, KinematicBody2D, etc. to give them a shape.");
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}
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int polygon_count = polygon.size();
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if (polygon_count == 0) {
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if (!warning.empty()) {
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warning += "\n\n";
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}
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warning += TTR("An empty CollisionPolygon2D has no effect on collision.");
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} else {
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bool solids = build_mode == BUILD_SOLIDS;
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if (solids) {
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if (polygon_count < 3) {
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if (!warning.empty()) {
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warning += "\n\n";
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}
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warning += TTR("Invalid polygon. At least 3 points are needed in 'Solids' build mode.");
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}
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} else if (polygon_count < 2) {
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if (!warning.empty()) {
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warning += "\n\n";
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}
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warning += TTR("Invalid polygon. At least 2 points are needed in 'Segments' build mode.");
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}
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}
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if (one_way_collision && Object::cast_to<Area2D>(get_parent())) {
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warning += TTR("The One Way Collision property will be ignored when the parent is an Area2D.");
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}
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return warning;
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}
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void CollisionPolygon2D::set_disabled(bool p_disabled) {
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disabled = p_disabled;
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update();
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if (parent) {
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parent->shape_owner_set_disabled(owner_id, p_disabled);
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}
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}
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bool CollisionPolygon2D::is_disabled() const {
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return disabled;
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}
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void CollisionPolygon2D::set_one_way_collision(bool p_enable) {
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one_way_collision = p_enable;
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update();
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if (parent) {
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parent->shape_owner_set_one_way_collision(owner_id, p_enable);
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}
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update_configuration_warning();
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}
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bool CollisionPolygon2D::is_one_way_collision_enabled() const {
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return one_way_collision;
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}
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void CollisionPolygon2D::set_one_way_collision_margin(float p_margin) {
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one_way_collision_margin = p_margin;
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if (parent) {
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parent->shape_owner_set_one_way_collision_margin(owner_id, one_way_collision_margin);
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}
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}
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float CollisionPolygon2D::get_one_way_collision_margin() const {
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return one_way_collision_margin;
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}
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void CollisionPolygon2D::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_polygon", "polygon"), &CollisionPolygon2D::set_polygon);
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ClassDB::bind_method(D_METHOD("get_polygon"), &CollisionPolygon2D::get_polygon);
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ClassDB::bind_method(D_METHOD("set_build_mode", "build_mode"), &CollisionPolygon2D::set_build_mode);
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ClassDB::bind_method(D_METHOD("get_build_mode"), &CollisionPolygon2D::get_build_mode);
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ClassDB::bind_method(D_METHOD("set_disabled", "disabled"), &CollisionPolygon2D::set_disabled);
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ClassDB::bind_method(D_METHOD("is_disabled"), &CollisionPolygon2D::is_disabled);
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ClassDB::bind_method(D_METHOD("set_one_way_collision", "enabled"), &CollisionPolygon2D::set_one_way_collision);
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ClassDB::bind_method(D_METHOD("is_one_way_collision_enabled"), &CollisionPolygon2D::is_one_way_collision_enabled);
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ClassDB::bind_method(D_METHOD("set_one_way_collision_margin", "margin"), &CollisionPolygon2D::set_one_way_collision_margin);
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ClassDB::bind_method(D_METHOD("get_one_way_collision_margin"), &CollisionPolygon2D::get_one_way_collision_margin);
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ADD_PROPERTY(PropertyInfo(Variant::INT, "build_mode", PROPERTY_HINT_ENUM, "Solids,Segments"), "set_build_mode", "get_build_mode");
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ADD_PROPERTY(PropertyInfo(Variant::POOL_VECTOR2_ARRAY, "polygon"), "set_polygon", "get_polygon");
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ADD_PROPERTY(PropertyInfo(Variant::BOOL, "disabled"), "set_disabled", "is_disabled");
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ADD_PROPERTY(PropertyInfo(Variant::BOOL, "one_way_collision"), "set_one_way_collision", "is_one_way_collision_enabled");
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ADD_PROPERTY(PropertyInfo(Variant::REAL, "one_way_collision_margin", PROPERTY_HINT_RANGE, "0,128,0.1"), "set_one_way_collision_margin", "get_one_way_collision_margin");
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BIND_ENUM_CONSTANT(BUILD_SOLIDS);
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BIND_ENUM_CONSTANT(BUILD_SEGMENTS);
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}
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CollisionPolygon2D::CollisionPolygon2D() {
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aabb = Rect2(-10, -10, 20, 20);
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build_mode = BUILD_SOLIDS;
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set_notify_local_transform(true);
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parent = nullptr;
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owner_id = 0;
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disabled = false;
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one_way_collision = false;
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one_way_collision_margin = 1.0;
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}
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