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+/*************************************************************************/
+/* shape_cast_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 "shape_cast_2d.h"
+
+#include "core/config/engine.h"
+#include "core/core_string_names.h"
+#include "scene/2d/collision_object_2d.h"
+#include "scene/2d/physics_body_2d.h"
+#include "scene/resources/circle_shape_2d.h"
+#include "servers/physics_2d/godot_physics_server_2d.h"
+
+void ShapeCast2D::set_target_position(const Vector2 &p_point) {
+ target_position = p_point;
+ if (is_inside_tree() && (Engine::get_singleton()->is_editor_hint() || get_tree()->is_debugging_collisions_hint())) {
+ update();
+ }
+}
+
+Vector2 ShapeCast2D::get_target_position() const {
+ return target_position;
+}
+
+void ShapeCast2D::set_margin(real_t p_margin) {
+ margin = p_margin;
+}
+
+real_t ShapeCast2D::get_margin() const {
+ return margin;
+}
+
+void ShapeCast2D::set_max_results(int p_max_results) {
+ max_results = p_max_results;
+}
+
+int ShapeCast2D::get_max_results() const {
+ return max_results;
+}
+
+void ShapeCast2D::set_collision_mask(uint32_t p_mask) {
+ collision_mask = p_mask;
+}
+
+uint32_t ShapeCast2D::get_collision_mask() const {
+ return collision_mask;
+}
+
+void ShapeCast2D::set_collision_mask_value(int p_layer_number, bool p_value) {
+ ERR_FAIL_COND_MSG(p_layer_number < 1, "Collision layer number must be between 1 and 32 inclusive.");
+ ERR_FAIL_COND_MSG(p_layer_number > 32, "Collision layer number must be between 1 and 32 inclusive.");
+ uint32_t mask = get_collision_mask();
+ if (p_value) {
+ mask |= 1 << (p_layer_number - 1);
+ } else {
+ mask &= ~(1 << (p_layer_number - 1));
+ }
+ set_collision_mask(mask);
+}
+
+bool ShapeCast2D::get_collision_mask_value(int p_layer_number) const {
+ ERR_FAIL_COND_V_MSG(p_layer_number < 1, false, "Collision layer number must be between 1 and 32 inclusive.");
+ ERR_FAIL_COND_V_MSG(p_layer_number > 32, false, "Collision layer number must be between 1 and 32 inclusive.");
+ return get_collision_mask() & (1 << (p_layer_number - 1));
+}
+
+int ShapeCast2D::get_collision_count() const {
+ return result.size();
+}
+
+bool ShapeCast2D::is_colliding() const {
+ return collided;
+}
+
+Object *ShapeCast2D::get_collider(int p_idx) const {
+ ERR_FAIL_INDEX_V_MSG(p_idx, result.size(), nullptr, "No collider found.");
+
+ if (result[p_idx].collider_id.is_null()) {
+ return nullptr;
+ }
+ return ObjectDB::get_instance(result[p_idx].collider_id);
+}
+
+int ShapeCast2D::get_collider_shape(int p_idx) const {
+ ERR_FAIL_INDEX_V_MSG(p_idx, result.size(), -1, "No collider shape found.");
+ return result[p_idx].shape;
+}
+
+Vector2 ShapeCast2D::get_collision_point(int p_idx) const {
+ ERR_FAIL_INDEX_V_MSG(p_idx, result.size(), Vector2(), "No collision point found.");
+ return result[p_idx].point;
+}
+
+Vector2 ShapeCast2D::get_collision_normal(int p_idx) const {
+ ERR_FAIL_INDEX_V_MSG(p_idx, result.size(), Vector2(), "No collision normal found.");
+ return result[p_idx].normal;
+}
+
+real_t ShapeCast2D::get_closest_collision_safe_fraction() const {
+ return collision_safe_fraction;
+}
+
+real_t ShapeCast2D::get_closest_collision_unsafe_fraction() const {
+ return collision_unsafe_fraction;
+}
+
+Object *ShapeCast2D::get_closest_collider() const {
+ ERR_FAIL_COND_V_MSG(result.is_empty(), nullptr, "Shape cast has not collided with anything yet.");
+ return ObjectDB::get_instance(result[0].collider_id);
+}
+
+int ShapeCast2D::get_closest_collider_shape() const {
+ ERR_FAIL_COND_V_MSG(result.is_empty(), -1, "Shape cast has not collided with anything yet.");
+ return result[0].shape;
+}
+
+Vector2 ShapeCast2D::get_closest_collision_point() const {
+ ERR_FAIL_COND_V_MSG(result.is_empty(), Vector2(), "Shape cast has not collided with anything yet.");
+ return result[0].point;
+}
+
+Vector2 ShapeCast2D::get_closest_collision_normal() const {
+ ERR_FAIL_COND_V_MSG(result.is_empty(), Vector2(), "Shape cast has not collided with anything yet.");
+ return result[0].normal;
+}
+
+void ShapeCast2D::set_enabled(bool p_enabled) {
+ enabled = p_enabled;
+ update();
+ if (is_inside_tree() && !Engine::get_singleton()->is_editor_hint()) {
+ set_physics_process_internal(p_enabled);
+ }
+ if (!p_enabled) {
+ collided = false;
+ }
+}
+
+bool ShapeCast2D::is_enabled() const {
+ return enabled;
+}
+
+void ShapeCast2D::set_shape(const Ref<Shape2D> &p_shape) {
+ shape = p_shape;
+ if (p_shape.is_valid()) {
+ shape->connect(CoreStringNames::get_singleton()->changed, callable_mp(this, &ShapeCast2D::_redraw_shape));
+ shape_rid = shape->get_rid();
+ }
+ update_configuration_warnings();
+ update();
+}
+
+Ref<Shape2D> ShapeCast2D::get_shape() const {
+ return shape;
+}
+
+void ShapeCast2D::set_exclude_parent_body(bool p_exclude_parent_body) {
+ if (exclude_parent_body == p_exclude_parent_body) {
+ return;
+ }
+ exclude_parent_body = p_exclude_parent_body;
+
+ if (!is_inside_tree()) {
+ return;
+ }
+ if (Object::cast_to<CollisionObject2D>(get_parent())) {
+ if (exclude_parent_body) {
+ exclude.insert(Object::cast_to<CollisionObject2D>(get_parent())->get_rid());
+ } else {
+ exclude.erase(Object::cast_to<CollisionObject2D>(get_parent())->get_rid());
+ }
+ }
+}
+
+bool ShapeCast2D::get_exclude_parent_body() const {
+ return exclude_parent_body;
+}
+
+void ShapeCast2D::_redraw_shape() {
+ update();
+}
+
+void ShapeCast2D::_notification(int p_what) {
+ switch (p_what) {
+ case NOTIFICATION_ENTER_TREE: {
+ if (enabled && !Engine::get_singleton()->is_editor_hint()) {
+ set_physics_process_internal(true);
+ } else {
+ set_physics_process_internal(false);
+ }
+ if (Object::cast_to<CollisionObject2D>(get_parent())) {
+ if (exclude_parent_body) {
+ exclude.insert(Object::cast_to<CollisionObject2D>(get_parent())->get_rid());
+ } else {
+ exclude.erase(Object::cast_to<CollisionObject2D>(get_parent())->get_rid());
+ }
+ }
+ } break;
+ case NOTIFICATION_EXIT_TREE: {
+ if (enabled) {
+ set_physics_process_internal(false);
+ }
+ } break;
+
+ case NOTIFICATION_DRAW: {
+#ifdef TOOLS_ENABLED
+ ERR_FAIL_COND(!is_inside_tree());
+ if (!Engine::get_singleton()->is_editor_hint() && !get_tree()->is_debugging_collisions_hint()) {
+ break;
+ }
+ if (shape.is_null()) {
+ break;
+ }
+ Color draw_col = get_tree()->get_debug_collisions_color();
+ if (!enabled) {
+ float g = draw_col.get_v();
+ draw_col.r = g;
+ draw_col.g = g;
+ draw_col.b = g;
+ }
+ // Draw continuos chain of shapes along the cast.
+ const int steps = MAX(2, target_position.length() / shape->get_rect().get_size().length() * 4);
+ for (int i = 0; i <= steps; ++i) {
+ Vector2 t = (real_t(i) / steps) * target_position;
+ draw_set_transform(t, 0.0, Size2(1, 1));
+ shape->draw(get_canvas_item(), draw_col);
+ }
+ draw_set_transform(Vector2(), 0.0, Size2(1, 1));
+
+ // Draw an arrow indicating where the ShapeCast is pointing to.
+ if (target_position != Vector2()) {
+ Transform2D xf;
+ xf.rotate(target_position.angle());
+ xf.translate(Vector2(target_position.length(), 0));
+
+ draw_line(Vector2(), target_position, draw_col, 2);
+ Vector<Vector2> pts;
+ float tsize = 8;
+ pts.push_back(xf.xform(Vector2(tsize, 0)));
+ pts.push_back(xf.xform(Vector2(0, Math_SQRT12 * tsize)));
+ pts.push_back(xf.xform(Vector2(0, -Math_SQRT12 * tsize)));
+ Vector<Color> cols;
+ for (int i = 0; i < 3; i++)
+ cols.push_back(draw_col);
+
+ draw_primitive(pts, cols, Vector<Vector2>());
+ }
+#endif
+ } break;
+ case NOTIFICATION_INTERNAL_PHYSICS_PROCESS: {
+ if (!enabled) {
+ break;
+ }
+ _update_shapecast_state();
+ } break;
+ }
+}
+
+void ShapeCast2D::_update_shapecast_state() {
+ result.clear();
+
+ ERR_FAIL_COND_MSG(shape.is_null(), "Invalid shape.");
+
+ Ref<World2D> w2d = get_world_2d();
+ ERR_FAIL_COND(w2d.is_null());
+
+ PhysicsDirectSpaceState2D *dss = PhysicsServer2D::get_singleton()->space_get_direct_state(w2d->get_space());
+ ERR_FAIL_COND(!dss);
+
+ Transform2D gt = get_global_transform();
+
+ PhysicsDirectSpaceState2D::ShapeParameters params;
+ params.shape_rid = shape_rid;
+ params.transform = gt;
+ params.motion = gt.basis_xform(target_position);
+ params.margin = margin;
+ params.exclude = exclude;
+ params.collision_mask = collision_mask;
+ params.collide_with_bodies = collide_with_bodies;
+ params.collide_with_areas = collide_with_areas;
+
+ collision_safe_fraction = 0.0;
+ collision_unsafe_fraction = 0.0;
+
+ if (target_position != Vector2()) {
+ dss->cast_motion(params, collision_safe_fraction, collision_unsafe_fraction);
+ if (collision_unsafe_fraction < 1.0) {
+ // Move shape transform to the point of impact,
+ // so we can collect contact info at that point.
+ gt.set_origin(gt.get_origin() + params.motion * (collision_unsafe_fraction + CMP_EPSILON));
+ params.transform = gt;
+ }
+ }
+ // Regardless of whether the shape is stuck or it's moved along
+ // the motion vector, we'll only consider static collisions from now on.
+ params.motion = Vector2();
+
+ bool intersected = true;
+ while (intersected && result.size() < max_results) {
+ PhysicsDirectSpaceState2D::ShapeRestInfo info;
+ intersected = dss->rest_info(params, &info);
+ if (intersected) {
+ result.push_back(info);
+ params.exclude.insert(info.rid);
+ }
+ }
+ collided = !result.is_empty();
+}
+
+void ShapeCast2D::force_shapecast_update() {
+ _update_shapecast_state();
+}
+
+void ShapeCast2D::add_exception_rid(const RID &p_rid) {
+ exclude.insert(p_rid);
+}
+
+void ShapeCast2D::add_exception(const Object *p_object) {
+ ERR_FAIL_NULL(p_object);
+ const CollisionObject2D *co = Object::cast_to<CollisionObject2D>(p_object);
+ if (!co) {
+ return;
+ }
+ add_exception_rid(co->get_rid());
+}
+
+void ShapeCast2D::remove_exception_rid(const RID &p_rid) {
+ exclude.erase(p_rid);
+}
+
+void ShapeCast2D::remove_exception(const Object *p_object) {
+ ERR_FAIL_NULL(p_object);
+ const CollisionObject2D *co = Object::cast_to<CollisionObject2D>(p_object);
+ if (!co) {
+ return;
+ }
+ remove_exception_rid(co->get_rid());
+}
+
+void ShapeCast2D::clear_exceptions() {
+ exclude.clear();
+}
+
+void ShapeCast2D::set_collide_with_areas(bool p_clip) {
+ collide_with_areas = p_clip;
+}
+
+bool ShapeCast2D::is_collide_with_areas_enabled() const {
+ return collide_with_areas;
+}
+
+void ShapeCast2D::set_collide_with_bodies(bool p_clip) {
+ collide_with_bodies = p_clip;
+}
+
+bool ShapeCast2D::is_collide_with_bodies_enabled() const {
+ return collide_with_bodies;
+}
+
+Array ShapeCast2D::_get_collision_result() const {
+ Array ret;
+
+ for (int i = 0; i < result.size(); ++i) {
+ const PhysicsDirectSpaceState2D::ShapeRestInfo &sri = result[i];
+
+ Dictionary col;
+ col["point"] = sri.point;
+ col["normal"] = sri.normal;
+ col["rid"] = sri.rid;
+ col["collider"] = ObjectDB::get_instance(sri.collider_id);
+ col["collider_id"] = sri.collider_id;
+ col["shape"] = sri.shape;
+ col["linear_velocity"] = sri.linear_velocity;
+
+ ret.push_back(col);
+ }
+ return ret;
+}
+
+TypedArray<String> ShapeCast2D::get_configuration_warnings() const {
+ TypedArray<String> warnings = Node2D::get_configuration_warnings();
+
+ if (shape.is_null()) {
+ warnings.push_back(TTR("This node cannot interact with other objects unless a Shape2D is assigned."));
+ }
+ return warnings;
+}
+
+void ShapeCast2D::_bind_methods() {
+ ClassDB::bind_method(D_METHOD("set_enabled", "enabled"), &ShapeCast2D::set_enabled);
+ ClassDB::bind_method(D_METHOD("is_enabled"), &ShapeCast2D::is_enabled);
+
+ ClassDB::bind_method(D_METHOD("set_shape", "shape"), &ShapeCast2D::set_shape);
+ ClassDB::bind_method(D_METHOD("get_shape"), &ShapeCast2D::get_shape);
+
+ ClassDB::bind_method(D_METHOD("set_target_position", "local_point"), &ShapeCast2D::set_target_position);
+ ClassDB::bind_method(D_METHOD("get_target_position"), &ShapeCast2D::get_target_position);
+
+ ClassDB::bind_method(D_METHOD("set_margin", "margin"), &ShapeCast2D::set_margin);
+ ClassDB::bind_method(D_METHOD("get_margin"), &ShapeCast2D::get_margin);
+
+ ClassDB::bind_method(D_METHOD("set_max_results", "max_results"), &ShapeCast2D::set_max_results);
+ ClassDB::bind_method(D_METHOD("get_max_results"), &ShapeCast2D::get_max_results);
+
+ ClassDB::bind_method(D_METHOD("is_colliding"), &ShapeCast2D::is_colliding);
+ ClassDB::bind_method(D_METHOD("get_collision_count"), &ShapeCast2D::get_collision_count);
+
+ ClassDB::bind_method(D_METHOD("force_shapecast_update"), &ShapeCast2D::force_shapecast_update);
+
+ ClassDB::bind_method(D_METHOD("get_collider", "index"), &ShapeCast2D::get_collider);
+ ClassDB::bind_method(D_METHOD("get_collider_shape", "index"), &ShapeCast2D::get_collider_shape);
+ ClassDB::bind_method(D_METHOD("get_collision_point", "index"), &ShapeCast2D::get_collision_point);
+ ClassDB::bind_method(D_METHOD("get_collision_normal", "index"), &ShapeCast2D::get_collision_normal);
+
+ ClassDB::bind_method(D_METHOD("get_closest_collider"), &ShapeCast2D::get_closest_collider);
+ ClassDB::bind_method(D_METHOD("get_closest_collider_shape"), &ShapeCast2D::get_closest_collider_shape);
+ ClassDB::bind_method(D_METHOD("get_closest_collision_point"), &ShapeCast2D::get_closest_collision_point);
+ ClassDB::bind_method(D_METHOD("get_closest_collision_normal"), &ShapeCast2D::get_closest_collision_normal);
+ ClassDB::bind_method(D_METHOD("get_closest_collision_safe_fraction"), &ShapeCast2D::get_closest_collision_safe_fraction);
+ ClassDB::bind_method(D_METHOD("get_closest_collision_unsafe_fraction"), &ShapeCast2D::get_closest_collision_unsafe_fraction);
+
+ ClassDB::bind_method(D_METHOD("add_exception_rid", "rid"), &ShapeCast2D::add_exception_rid);
+ ClassDB::bind_method(D_METHOD("add_exception", "node"), &ShapeCast2D::add_exception);
+
+ ClassDB::bind_method(D_METHOD("remove_exception_rid", "rid"), &ShapeCast2D::remove_exception_rid);
+ ClassDB::bind_method(D_METHOD("remove_exception", "node"), &ShapeCast2D::remove_exception);
+
+ ClassDB::bind_method(D_METHOD("clear_exceptions"), &ShapeCast2D::clear_exceptions);
+
+ ClassDB::bind_method(D_METHOD("set_collision_mask", "mask"), &ShapeCast2D::set_collision_mask);
+ ClassDB::bind_method(D_METHOD("get_collision_mask"), &ShapeCast2D::get_collision_mask);
+
+ ClassDB::bind_method(D_METHOD("set_collision_mask_value", "layer_number", "value"), &ShapeCast2D::set_collision_mask_value);
+ ClassDB::bind_method(D_METHOD("get_collision_mask_value", "layer_number"), &ShapeCast2D::get_collision_mask_value);
+
+ ClassDB::bind_method(D_METHOD("set_exclude_parent_body", "mask"), &ShapeCast2D::set_exclude_parent_body);
+ ClassDB::bind_method(D_METHOD("get_exclude_parent_body"), &ShapeCast2D::get_exclude_parent_body);
+
+ ClassDB::bind_method(D_METHOD("set_collide_with_areas", "enable"), &ShapeCast2D::set_collide_with_areas);
+ ClassDB::bind_method(D_METHOD("is_collide_with_areas_enabled"), &ShapeCast2D::is_collide_with_areas_enabled);
+
+ ClassDB::bind_method(D_METHOD("set_collide_with_bodies", "enable"), &ShapeCast2D::set_collide_with_bodies);
+ ClassDB::bind_method(D_METHOD("is_collide_with_bodies_enabled"), &ShapeCast2D::is_collide_with_bodies_enabled);
+
+ ClassDB::bind_method(D_METHOD("_get_collision_result"), &ShapeCast2D::_get_collision_result);
+
+ ADD_PROPERTY(PropertyInfo(Variant::BOOL, "enabled"), "set_enabled", "is_enabled");
+ ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "shape", PROPERTY_HINT_RESOURCE_TYPE, "Shape2D"), "set_shape", "get_shape");
+ ADD_PROPERTY(PropertyInfo(Variant::BOOL, "exclude_parent"), "set_exclude_parent_body", "get_exclude_parent_body");
+ ADD_PROPERTY(PropertyInfo(Variant::VECTOR2, "target_position"), "set_target_position", "get_target_position");
+ ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "margin", PROPERTY_HINT_RANGE, "0,100,0.01"), "set_margin", "get_margin");
+ ADD_PROPERTY(PropertyInfo(Variant::INT, "max_results"), "set_max_results", "get_max_results");
+ ADD_PROPERTY(PropertyInfo(Variant::INT, "collision_mask", PROPERTY_HINT_LAYERS_2D_PHYSICS), "set_collision_mask", "get_collision_mask");
+ ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "collision_result", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NO_EDITOR), "", "_get_collision_result");
+ ADD_GROUP("Collide With", "collide_with");
+ ADD_PROPERTY(PropertyInfo(Variant::BOOL, "collide_with_areas", PROPERTY_HINT_LAYERS_3D_PHYSICS), "set_collide_with_areas", "is_collide_with_areas_enabled");
+ ADD_PROPERTY(PropertyInfo(Variant::BOOL, "collide_with_bodies", PROPERTY_HINT_LAYERS_3D_PHYSICS), "set_collide_with_bodies", "is_collide_with_bodies_enabled");
+}