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Diffstat (limited to 'scene/2d/shape_cast_2d.cpp')
| -rw-r--r-- | scene/2d/shape_cast_2d.cpp | 459 |
1 files changed, 459 insertions, 0 deletions
diff --git a/scene/2d/shape_cast_2d.cpp b/scene/2d/shape_cast_2d.cpp new file mode 100644 index 0000000000..50b44eb4ef --- /dev/null +++ b/scene/2d/shape_cast_2d.cpp @@ -0,0 +1,459 @@ +/*************************************************************************/ +/* 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; +} + +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_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"); +} |