/*************************************************************************/ /* collision_polygon_2d.cpp */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ #include "collision_polygon_2d.h" #include "collision_object_2d.h" #include "core/math/geometry_2d.h" #include "scene/resources/concave_polygon_shape_2d.h" #include "scene/resources/convex_polygon_shape_2d.h" #include "thirdparty/misc/polypartition.h" void CollisionPolygon2D::_build_polygon() { parent->shape_owner_clear_shapes(owner_id); bool solids = build_mode == BUILD_SOLIDS; if (solids) { if (polygon.size() < 3) { return; } //here comes the sun, lalalala //decompose concave into multiple convex polygons and add them Vector<Vector<Vector2>> decomp = _decompose_in_convex(); for (int i = 0; i < decomp.size(); i++) { Ref<ConvexPolygonShape2D> convex = memnew(ConvexPolygonShape2D); convex->set_points(decomp[i]); parent->shape_owner_add_shape(owner_id, convex); } } else { if (polygon.size() < 2) { return; } Ref<ConcavePolygonShape2D> concave = memnew(ConcavePolygonShape2D); Vector<Vector2> segments; segments.resize(polygon.size() * 2); Vector2 *w = segments.ptrw(); for (int i = 0; i < polygon.size(); i++) { w[(i << 1) + 0] = polygon[i]; w[(i << 1) + 1] = polygon[(i + 1) % polygon.size()]; } concave->set_segments(segments); parent->shape_owner_add_shape(owner_id, concave); } } Vector<Vector<Vector2>> CollisionPolygon2D::_decompose_in_convex() { Vector<Vector<Vector2>> decomp = Geometry2D::decompose_polygon_in_convex(polygon); return decomp; } void CollisionPolygon2D::_update_in_shape_owner(bool p_xform_only) { parent->shape_owner_set_transform(owner_id, get_transform()); if (p_xform_only) { return; } parent->shape_owner_set_disabled(owner_id, disabled); parent->shape_owner_set_one_way_collision(owner_id, one_way_collision); parent->shape_owner_set_one_way_collision_margin(owner_id, one_way_collision_margin); } void CollisionPolygon2D::_notification(int p_what) { switch (p_what) { case NOTIFICATION_PARENTED: { parent = Object::cast_to<CollisionObject2D>(get_parent()); if (parent) { owner_id = parent->create_shape_owner(this); _build_polygon(); _update_in_shape_owner(); } /*if (Engine::get_singleton()->is_editor_hint()) { //display above all else set_z_as_relative(false); set_z_index(RS::CANVAS_ITEM_Z_MAX - 1); }*/ } break; case NOTIFICATION_ENTER_TREE: { if (parent) { _update_in_shape_owner(); } } break; case NOTIFICATION_LOCAL_TRANSFORM_CHANGED: { if (parent) { _update_in_shape_owner(true); } } break; case NOTIFICATION_UNPARENTED: { if (parent) { parent->remove_shape_owner(owner_id); } owner_id = 0; parent = nullptr; } break; case NOTIFICATION_DRAW: { if (!Engine::get_singleton()->is_editor_hint() && !get_tree()->is_debugging_collisions_hint()) { break; } int polygon_count = polygon.size(); for (int i = 0; i < polygon_count; i++) { Vector2 p = polygon[i]; Vector2 n = polygon[(i + 1) % polygon_count]; // draw line with width <= 1, so it does not scale with zoom and break pixel exact editing draw_line(p, n, Color(0.9, 0.2, 0.0, 0.8), 1); } if (polygon_count > 2) { #define DEBUG_DECOMPOSE #if defined(TOOLS_ENABLED) && defined(DEBUG_DECOMPOSE) Vector<Vector<Vector2>> decomp = _decompose_in_convex(); Color c(0.4, 0.9, 0.1); for (int i = 0; i < decomp.size(); i++) { c.set_hsv(Math::fmod(c.get_h() + 0.738, 1), c.get_s(), c.get_v(), 0.5); draw_colored_polygon(decomp[i], c); } #else draw_colored_polygon(polygon, get_tree()->get_debug_collisions_color()); #endif } if (one_way_collision) { Color dcol = get_tree()->get_debug_collisions_color(); //0.9,0.2,0.2,0.4); dcol.a = 1.0; Vector2 line_to(0, 20); draw_line(Vector2(), line_to, dcol, 3); Vector<Vector2> pts; real_t tsize = 8; pts.push_back(line_to + (Vector2(0, tsize))); pts.push_back(line_to + (Vector2(Math_SQRT12 * tsize, 0))); pts.push_back(line_to + (Vector2(-Math_SQRT12 * tsize, 0))); Vector<Color> cols; for (int i = 0; i < 3; i++) { cols.push_back(dcol); } draw_primitive(pts, cols, Vector<Vector2>()); //small arrow } } break; } } void CollisionPolygon2D::set_polygon(const Vector<Point2> &p_polygon) { polygon = p_polygon; { for (int i = 0; i < polygon.size(); i++) { if (i == 0) { aabb = Rect2(polygon[i], Size2()); } else { aabb.expand_to(polygon[i]); } } if (aabb == Rect2()) { aabb = Rect2(-10, -10, 20, 20); } else { aabb.position -= aabb.size * 0.3; aabb.size += aabb.size * 0.6; } } if (parent) { _build_polygon(); _update_in_shape_owner(); } update(); update_configuration_warnings(); } Vector<Point2> CollisionPolygon2D::get_polygon() const { return polygon; } void CollisionPolygon2D::set_build_mode(BuildMode p_mode) { ERR_FAIL_INDEX((int)p_mode, 2); build_mode = p_mode; if (parent) { _build_polygon(); _update_in_shape_owner(); } update(); update_configuration_warnings(); } CollisionPolygon2D::BuildMode CollisionPolygon2D::get_build_mode() const { return build_mode; } #ifdef TOOLS_ENABLED Rect2 CollisionPolygon2D::_edit_get_rect() const { return aabb; } bool CollisionPolygon2D::_edit_use_rect() const { return true; } bool CollisionPolygon2D::_edit_is_selected_on_click(const Point2 &p_point, double p_tolerance) const { return Geometry2D::is_point_in_polygon(p_point, Variant(polygon)); } #endif TypedArray<String> CollisionPolygon2D::get_configuration_warnings() const { TypedArray<String> warnings = Node::get_configuration_warnings(); if (!Object::cast_to<CollisionObject2D>(get_parent())) { warnings.push_back(TTR("CollisionPolygon2D only serves to provide a collision shape to a CollisionObject2D derived node. Please only use it as a child of Area2D, StaticBody2D, RigidDynamicBody2D, CharacterBody2D, etc. to give them a shape.")); } int polygon_count = polygon.size(); if (polygon_count == 0) { warnings.push_back(TTR("An empty CollisionPolygon2D has no effect on collision.")); } else { bool solids = build_mode == BUILD_SOLIDS; if (solids) { if (polygon_count < 3) { warnings.push_back(TTR("Invalid polygon. At least 3 points are needed in 'Solids' build mode.")); } } else if (polygon_count < 2) { warnings.push_back(TTR("Invalid polygon. At least 2 points are needed in 'Segments' build mode.")); } } return warnings; } void CollisionPolygon2D::set_disabled(bool p_disabled) { disabled = p_disabled; update(); if (parent) { parent->shape_owner_set_disabled(owner_id, p_disabled); } } bool CollisionPolygon2D::is_disabled() const { return disabled; } void CollisionPolygon2D::set_one_way_collision(bool p_enable) { one_way_collision = p_enable; update(); if (parent) { parent->shape_owner_set_one_way_collision(owner_id, p_enable); } } bool CollisionPolygon2D::is_one_way_collision_enabled() const { return one_way_collision; } void CollisionPolygon2D::set_one_way_collision_margin(real_t p_margin) { one_way_collision_margin = p_margin; if (parent) { parent->shape_owner_set_one_way_collision_margin(owner_id, one_way_collision_margin); } } real_t CollisionPolygon2D::get_one_way_collision_margin() const { return one_way_collision_margin; } void CollisionPolygon2D::_bind_methods() { ClassDB::bind_method(D_METHOD("set_polygon", "polygon"), &CollisionPolygon2D::set_polygon); ClassDB::bind_method(D_METHOD("get_polygon"), &CollisionPolygon2D::get_polygon); ClassDB::bind_method(D_METHOD("set_build_mode", "build_mode"), &CollisionPolygon2D::set_build_mode); ClassDB::bind_method(D_METHOD("get_build_mode"), &CollisionPolygon2D::get_build_mode); ClassDB::bind_method(D_METHOD("set_disabled", "disabled"), &CollisionPolygon2D::set_disabled); ClassDB::bind_method(D_METHOD("is_disabled"), &CollisionPolygon2D::is_disabled); ClassDB::bind_method(D_METHOD("set_one_way_collision", "enabled"), &CollisionPolygon2D::set_one_way_collision); ClassDB::bind_method(D_METHOD("is_one_way_collision_enabled"), &CollisionPolygon2D::is_one_way_collision_enabled); ClassDB::bind_method(D_METHOD("set_one_way_collision_margin", "margin"), &CollisionPolygon2D::set_one_way_collision_margin); ClassDB::bind_method(D_METHOD("get_one_way_collision_margin"), &CollisionPolygon2D::get_one_way_collision_margin); ADD_PROPERTY(PropertyInfo(Variant::INT, "build_mode", PROPERTY_HINT_ENUM, "Solids,Segments"), "set_build_mode", "get_build_mode"); ADD_PROPERTY(PropertyInfo(Variant::PACKED_VECTOR2_ARRAY, "polygon"), "set_polygon", "get_polygon"); ADD_PROPERTY(PropertyInfo(Variant::BOOL, "disabled"), "set_disabled", "is_disabled"); ADD_PROPERTY(PropertyInfo(Variant::BOOL, "one_way_collision"), "set_one_way_collision", "is_one_way_collision_enabled"); ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "one_way_collision_margin", PROPERTY_HINT_RANGE, "0,128,0.1"), "set_one_way_collision_margin", "get_one_way_collision_margin"); BIND_ENUM_CONSTANT(BUILD_SOLIDS); BIND_ENUM_CONSTANT(BUILD_SEGMENTS); } CollisionPolygon2D::CollisionPolygon2D() { set_notify_local_transform(true); }