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