d95794ec8a
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".
536 lines
22 KiB
C++
536 lines
22 KiB
C++
/**************************************************************************/
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/* godot_shape_2d.h */
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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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#ifndef GODOT_SHAPE_2D_H
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#define GODOT_SHAPE_2D_H
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#include "servers/physics_server_2d.h"
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#define _SEGMENT_IS_VALID_SUPPORT_THRESHOLD 0.99998
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class GodotShape2D;
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class GodotShapeOwner2D {
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public:
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virtual void _shape_changed() = 0;
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virtual void remove_shape(GodotShape2D *p_shape) = 0;
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virtual ~GodotShapeOwner2D() {}
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};
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class GodotShape2D {
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RID self;
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Rect2 aabb;
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bool configured = false;
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real_t custom_bias = 0.0;
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HashMap<GodotShapeOwner2D *, int> owners;
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protected:
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void configure(const Rect2 &p_aabb);
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public:
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_FORCE_INLINE_ void set_self(const RID &p_self) { self = p_self; }
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_FORCE_INLINE_ RID get_self() const { return self; }
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virtual PhysicsServer2D::ShapeType get_type() const = 0;
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_FORCE_INLINE_ Rect2 get_aabb() const { return aabb; }
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_FORCE_INLINE_ bool is_configured() const { return configured; }
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virtual bool allows_one_way_collision() const { return true; }
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virtual bool is_concave() const { return false; }
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virtual bool contains_point(const Vector2 &p_point) const = 0;
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virtual void project_rangev(const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const = 0;
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virtual void project_range_castv(const Vector2 &p_cast, const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const = 0;
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virtual Vector2 get_support(const Vector2 &p_normal) const;
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virtual void get_supports(const Vector2 &p_normal, Vector2 *r_supports, int &r_amount) const = 0;
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virtual bool intersect_segment(const Vector2 &p_begin, const Vector2 &p_end, Vector2 &r_point, Vector2 &r_normal) const = 0;
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virtual real_t get_moment_of_inertia(real_t p_mass, const Size2 &p_scale) const = 0;
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virtual void set_data(const Variant &p_data) = 0;
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virtual Variant get_data() const = 0;
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_FORCE_INLINE_ void set_custom_bias(real_t p_bias) { custom_bias = p_bias; }
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_FORCE_INLINE_ real_t get_custom_bias() const { return custom_bias; }
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void add_owner(GodotShapeOwner2D *p_owner);
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void remove_owner(GodotShapeOwner2D *p_owner);
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bool is_owner(GodotShapeOwner2D *p_owner) const;
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const HashMap<GodotShapeOwner2D *, int> &get_owners() const;
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_FORCE_INLINE_ void get_supports_transformed_cast(const Vector2 &p_cast, const Vector2 &p_normal, const Transform2D &p_xform, Vector2 *r_supports, int &r_amount) const {
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get_supports(p_xform.basis_xform_inv(p_normal).normalized(), r_supports, r_amount);
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for (int i = 0; i < r_amount; i++) {
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r_supports[i] = p_xform.xform(r_supports[i]);
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}
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if (r_amount == 1) {
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if (Math::abs(p_normal.dot(p_cast.normalized())) < (1.0 - _SEGMENT_IS_VALID_SUPPORT_THRESHOLD)) {
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//make line because they are parallel
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r_amount = 2;
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r_supports[1] = r_supports[0] + p_cast;
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} else if (p_cast.dot(p_normal) > 0) {
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//normal points towards cast, add cast
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r_supports[0] += p_cast;
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}
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} else {
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if (Math::abs(p_normal.dot(p_cast.normalized())) < (1.0 - _SEGMENT_IS_VALID_SUPPORT_THRESHOLD)) {
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//optimize line and make it larger because they are parallel
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if ((r_supports[1] - r_supports[0]).dot(p_cast) > 0) {
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//larger towards 1
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r_supports[1] += p_cast;
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} else {
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//larger towards 0
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r_supports[0] += p_cast;
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}
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} else if (p_cast.dot(p_normal) > 0) {
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//normal points towards cast, add cast
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r_supports[0] += p_cast;
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r_supports[1] += p_cast;
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}
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}
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}
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GodotShape2D() {}
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virtual ~GodotShape2D();
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};
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//let the optimizer do the magic
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#define DEFAULT_PROJECT_RANGE_CAST \
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virtual void project_range_castv(const Vector2 &p_cast, const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const override { \
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project_range_cast(p_cast, p_normal, p_transform, r_min, r_max); \
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} \
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_FORCE_INLINE_ void project_range_cast(const Vector2 &p_cast, const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const { \
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real_t mina, maxa; \
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real_t minb, maxb; \
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Transform2D ofsb = p_transform; \
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ofsb.columns[2] += p_cast; \
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project_range(p_normal, p_transform, mina, maxa); \
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project_range(p_normal, ofsb, minb, maxb); \
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r_min = MIN(mina, minb); \
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r_max = MAX(maxa, maxb); \
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}
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class GodotWorldBoundaryShape2D : public GodotShape2D {
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Vector2 normal;
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real_t d = 0.0;
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public:
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_FORCE_INLINE_ Vector2 get_normal() const { return normal; }
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_FORCE_INLINE_ real_t get_d() const { return d; }
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virtual PhysicsServer2D::ShapeType get_type() const override { return PhysicsServer2D::SHAPE_WORLD_BOUNDARY; }
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virtual void project_rangev(const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const override { project_range(p_normal, p_transform, r_min, r_max); }
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virtual void get_supports(const Vector2 &p_normal, Vector2 *r_supports, int &r_amount) const override;
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virtual bool contains_point(const Vector2 &p_point) const override;
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virtual bool intersect_segment(const Vector2 &p_begin, const Vector2 &p_end, Vector2 &r_point, Vector2 &r_normal) const override;
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virtual real_t get_moment_of_inertia(real_t p_mass, const Size2 &p_scale) const override;
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virtual void set_data(const Variant &p_data) override;
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virtual Variant get_data() const override;
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_FORCE_INLINE_ void project_range(const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const {
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//real large
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r_min = -1e10;
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r_max = 1e10;
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}
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virtual void project_range_castv(const Vector2 &p_cast, const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const override {
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project_range_cast(p_cast, p_normal, p_transform, r_min, r_max);
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}
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_FORCE_INLINE_ void project_range_cast(const Vector2 &p_cast, const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const {
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//real large
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r_min = -1e10;
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r_max = 1e10;
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}
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};
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class GodotSeparationRayShape2D : public GodotShape2D {
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real_t length = 0.0;
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bool slide_on_slope = false;
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public:
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_FORCE_INLINE_ real_t get_length() const { return length; }
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_FORCE_INLINE_ bool get_slide_on_slope() const { return slide_on_slope; }
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virtual PhysicsServer2D::ShapeType get_type() const override { return PhysicsServer2D::SHAPE_SEPARATION_RAY; }
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virtual bool allows_one_way_collision() const override { return false; }
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virtual void project_rangev(const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const override { project_range(p_normal, p_transform, r_min, r_max); }
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virtual void get_supports(const Vector2 &p_normal, Vector2 *r_supports, int &r_amount) const override;
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virtual bool contains_point(const Vector2 &p_point) const override;
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virtual bool intersect_segment(const Vector2 &p_begin, const Vector2 &p_end, Vector2 &r_point, Vector2 &r_normal) const override;
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virtual real_t get_moment_of_inertia(real_t p_mass, const Size2 &p_scale) const override;
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virtual void set_data(const Variant &p_data) override;
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virtual Variant get_data() const override;
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_FORCE_INLINE_ void project_range(const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const {
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//real large
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r_max = p_normal.dot(p_transform.get_origin());
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r_min = p_normal.dot(p_transform.xform(Vector2(0, length)));
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if (r_max < r_min) {
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SWAP(r_max, r_min);
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}
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}
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DEFAULT_PROJECT_RANGE_CAST
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_FORCE_INLINE_ GodotSeparationRayShape2D() {}
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_FORCE_INLINE_ GodotSeparationRayShape2D(real_t p_length) { length = p_length; }
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};
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class GodotSegmentShape2D : public GodotShape2D {
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Vector2 a;
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Vector2 b;
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Vector2 n;
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public:
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_FORCE_INLINE_ const Vector2 &get_a() const { return a; }
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_FORCE_INLINE_ const Vector2 &get_b() const { return b; }
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_FORCE_INLINE_ const Vector2 &get_normal() const { return n; }
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virtual PhysicsServer2D::ShapeType get_type() const override { return PhysicsServer2D::SHAPE_SEGMENT; }
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_FORCE_INLINE_ Vector2 get_xformed_normal(const Transform2D &p_xform) const {
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return (p_xform.xform(b) - p_xform.xform(a)).normalized().orthogonal();
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}
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virtual void project_rangev(const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const override { project_range(p_normal, p_transform, r_min, r_max); }
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virtual void get_supports(const Vector2 &p_normal, Vector2 *r_supports, int &r_amount) const override;
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virtual bool contains_point(const Vector2 &p_point) const override;
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virtual bool intersect_segment(const Vector2 &p_begin, const Vector2 &p_end, Vector2 &r_point, Vector2 &r_normal) const override;
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virtual real_t get_moment_of_inertia(real_t p_mass, const Size2 &p_scale) const override;
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virtual void set_data(const Variant &p_data) override;
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virtual Variant get_data() const override;
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_FORCE_INLINE_ void project_range(const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const {
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//real large
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r_max = p_normal.dot(p_transform.xform(a));
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r_min = p_normal.dot(p_transform.xform(b));
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if (r_max < r_min) {
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SWAP(r_max, r_min);
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}
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}
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DEFAULT_PROJECT_RANGE_CAST
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_FORCE_INLINE_ GodotSegmentShape2D() {}
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_FORCE_INLINE_ GodotSegmentShape2D(const Vector2 &p_a, const Vector2 &p_b, const Vector2 &p_n) {
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a = p_a;
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b = p_b;
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n = p_n;
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}
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};
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class GodotCircleShape2D : public GodotShape2D {
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real_t radius;
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public:
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_FORCE_INLINE_ const real_t &get_radius() const { return radius; }
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virtual PhysicsServer2D::ShapeType get_type() const override { return PhysicsServer2D::SHAPE_CIRCLE; }
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virtual void project_rangev(const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const override { project_range(p_normal, p_transform, r_min, r_max); }
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virtual void get_supports(const Vector2 &p_normal, Vector2 *r_supports, int &r_amount) const override;
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virtual bool contains_point(const Vector2 &p_point) const override;
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virtual bool intersect_segment(const Vector2 &p_begin, const Vector2 &p_end, Vector2 &r_point, Vector2 &r_normal) const override;
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virtual real_t get_moment_of_inertia(real_t p_mass, const Size2 &p_scale) const override;
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virtual void set_data(const Variant &p_data) override;
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virtual Variant get_data() const override;
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_FORCE_INLINE_ void project_range(const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const {
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//real large
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real_t d = p_normal.dot(p_transform.get_origin());
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// figure out scale at point
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Vector2 local_normal = p_transform.basis_xform_inv(p_normal);
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real_t scale = local_normal.length();
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r_min = d - (radius)*scale;
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r_max = d + (radius)*scale;
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}
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DEFAULT_PROJECT_RANGE_CAST
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};
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class GodotRectangleShape2D : public GodotShape2D {
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Vector2 half_extents;
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public:
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_FORCE_INLINE_ const Vector2 &get_half_extents() const { return half_extents; }
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virtual PhysicsServer2D::ShapeType get_type() const override { return PhysicsServer2D::SHAPE_RECTANGLE; }
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virtual void project_rangev(const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const override { project_range(p_normal, p_transform, r_min, r_max); }
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virtual void get_supports(const Vector2 &p_normal, Vector2 *r_supports, int &r_amount) const override;
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virtual bool contains_point(const Vector2 &p_point) const override;
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virtual bool intersect_segment(const Vector2 &p_begin, const Vector2 &p_end, Vector2 &r_point, Vector2 &r_normal) const override;
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virtual real_t get_moment_of_inertia(real_t p_mass, const Size2 &p_scale) const override;
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virtual void set_data(const Variant &p_data) override;
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virtual Variant get_data() const override;
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_FORCE_INLINE_ void project_range(const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const {
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// no matter the angle, the box is mirrored anyway
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r_max = -1e20;
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r_min = 1e20;
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for (int i = 0; i < 4; i++) {
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real_t d = p_normal.dot(p_transform.xform(Vector2(((i & 1) * 2 - 1) * half_extents.x, ((i >> 1) * 2 - 1) * half_extents.y)));
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if (d > r_max) {
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r_max = d;
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}
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if (d < r_min) {
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r_min = d;
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}
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}
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}
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_FORCE_INLINE_ Vector2 get_circle_axis(const Transform2D &p_xform, const Transform2D &p_xform_inv, const Vector2 &p_circle) const {
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Vector2 local_v = p_xform_inv.xform(p_circle);
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Vector2 he(
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(local_v.x < 0) ? -half_extents.x : half_extents.x,
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(local_v.y < 0) ? -half_extents.y : half_extents.y);
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return (p_xform.xform(he) - p_circle).normalized();
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}
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_FORCE_INLINE_ Vector2 get_box_axis(const Transform2D &p_xform, const Transform2D &p_xform_inv, const GodotRectangleShape2D *p_B, const Transform2D &p_B_xform, const Transform2D &p_B_xform_inv) const {
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Vector2 a, b;
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{
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Vector2 local_v = p_xform_inv.xform(p_B_xform.get_origin());
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Vector2 he(
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(local_v.x < 0) ? -half_extents.x : half_extents.x,
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(local_v.y < 0) ? -half_extents.y : half_extents.y);
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a = p_xform.xform(he);
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}
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{
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Vector2 local_v = p_B_xform_inv.xform(p_xform.get_origin());
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Vector2 he(
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(local_v.x < 0) ? -p_B->half_extents.x : p_B->half_extents.x,
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(local_v.y < 0) ? -p_B->half_extents.y : p_B->half_extents.y);
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b = p_B_xform.xform(he);
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}
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return (a - b).normalized();
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}
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DEFAULT_PROJECT_RANGE_CAST
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};
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class GodotCapsuleShape2D : public GodotShape2D {
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real_t radius = 0.0;
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real_t height = 0.0;
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public:
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_FORCE_INLINE_ const real_t &get_radius() const { return radius; }
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_FORCE_INLINE_ const real_t &get_height() const { return height; }
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virtual PhysicsServer2D::ShapeType get_type() const override { return PhysicsServer2D::SHAPE_CAPSULE; }
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virtual void project_rangev(const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const override { project_range(p_normal, p_transform, r_min, r_max); }
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virtual void get_supports(const Vector2 &p_normal, Vector2 *r_supports, int &r_amount) const override;
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virtual bool contains_point(const Vector2 &p_point) const override;
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virtual bool intersect_segment(const Vector2 &p_begin, const Vector2 &p_end, Vector2 &r_point, Vector2 &r_normal) const override;
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virtual real_t get_moment_of_inertia(real_t p_mass, const Size2 &p_scale) const override;
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virtual void set_data(const Variant &p_data) override;
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virtual Variant get_data() const override;
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_FORCE_INLINE_ void project_range(const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const {
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// no matter the angle, the box is mirrored anyway
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Vector2 n = p_transform.basis_xform_inv(p_normal).normalized();
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real_t h = height * 0.5 - radius;
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n *= radius;
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n.y += (n.y > 0) ? h : -h;
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r_max = p_normal.dot(p_transform.xform(n));
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r_min = p_normal.dot(p_transform.xform(-n));
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if (r_max < r_min) {
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SWAP(r_max, r_min);
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}
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//ERR_FAIL_COND( r_max < r_min );
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}
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DEFAULT_PROJECT_RANGE_CAST
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};
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class GodotConvexPolygonShape2D : public GodotShape2D {
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struct Point {
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Vector2 pos;
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Vector2 normal; //normal to next segment
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};
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Point *points = nullptr;
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int point_count = 0;
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public:
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_FORCE_INLINE_ int get_point_count() const { return point_count; }
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_FORCE_INLINE_ const Vector2 &get_point(int p_idx) const { return points[p_idx].pos; }
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_FORCE_INLINE_ const Vector2 &get_segment_normal(int p_idx) const { return points[p_idx].normal; }
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_FORCE_INLINE_ Vector2 get_xformed_segment_normal(const Transform2D &p_xform, int p_idx) const {
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Vector2 a = points[p_idx].pos;
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p_idx++;
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Vector2 b = points[p_idx == point_count ? 0 : p_idx].pos;
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return (p_xform.xform(b) - p_xform.xform(a)).normalized().orthogonal();
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}
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virtual PhysicsServer2D::ShapeType get_type() const override { return PhysicsServer2D::SHAPE_CONVEX_POLYGON; }
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virtual void project_rangev(const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const override { project_range(p_normal, p_transform, r_min, r_max); }
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virtual void get_supports(const Vector2 &p_normal, Vector2 *r_supports, int &r_amount) const override;
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virtual bool contains_point(const Vector2 &p_point) const override;
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virtual bool intersect_segment(const Vector2 &p_begin, const Vector2 &p_end, Vector2 &r_point, Vector2 &r_normal) const override;
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virtual real_t get_moment_of_inertia(real_t p_mass, const Size2 &p_scale) const override;
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virtual void set_data(const Variant &p_data) override;
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virtual Variant get_data() const override;
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|
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_FORCE_INLINE_ void project_range(const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const {
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if (!points || point_count <= 0) {
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r_min = r_max = 0;
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return;
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}
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r_min = r_max = p_normal.dot(p_transform.xform(points[0].pos));
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for (int i = 1; i < point_count; i++) {
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real_t d = p_normal.dot(p_transform.xform(points[i].pos));
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if (d > r_max) {
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r_max = d;
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}
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if (d < r_min) {
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r_min = d;
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}
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}
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}
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DEFAULT_PROJECT_RANGE_CAST
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GodotConvexPolygonShape2D() {}
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~GodotConvexPolygonShape2D();
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|
};
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|
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class GodotConcaveShape2D : public GodotShape2D {
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public:
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virtual bool is_concave() const override { return true; }
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|
|
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// Returns true to stop the query.
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typedef bool (*QueryCallback)(void *p_userdata, GodotShape2D *p_convex);
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|
|
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virtual void cull(const Rect2 &p_local_aabb, QueryCallback p_callback, void *p_userdata) const = 0;
|
|
};
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|
|
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class GodotConcavePolygonShape2D : public GodotConcaveShape2D {
|
|
struct Segment {
|
|
int points[2] = {};
|
|
};
|
|
|
|
Vector<Segment> segments;
|
|
Vector<Point2> points;
|
|
|
|
struct BVH {
|
|
Rect2 aabb;
|
|
int left = 0, right = 0;
|
|
};
|
|
|
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Vector<BVH> bvh;
|
|
int bvh_depth = 0;
|
|
|
|
struct BVH_CompareX {
|
|
_FORCE_INLINE_ bool operator()(const BVH &a, const BVH &b) const {
|
|
return (a.aabb.position.x + a.aabb.size.x * 0.5) < (b.aabb.position.x + b.aabb.size.x * 0.5);
|
|
}
|
|
};
|
|
|
|
struct BVH_CompareY {
|
|
_FORCE_INLINE_ bool operator()(const BVH &a, const BVH &b) const {
|
|
return (a.aabb.position.y + a.aabb.size.y * 0.5) < (b.aabb.position.y + b.aabb.size.y * 0.5);
|
|
}
|
|
};
|
|
|
|
int _generate_bvh(BVH *p_bvh, int p_len, int p_depth);
|
|
|
|
public:
|
|
virtual PhysicsServer2D::ShapeType get_type() const override { return PhysicsServer2D::SHAPE_CONCAVE_POLYGON; }
|
|
|
|
virtual void project_rangev(const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const override {
|
|
r_min = 0;
|
|
r_max = 0;
|
|
ERR_FAIL_MSG("Unsupported call to project_rangev in GodotConcavePolygonShape2D");
|
|
}
|
|
|
|
void project_range(const Vector2 &p_normal, const Transform2D &p_transform, real_t &r_min, real_t &r_max) const {
|
|
r_min = 0;
|
|
r_max = 0;
|
|
ERR_FAIL_MSG("Unsupported call to project_range in GodotConcavePolygonShape2D");
|
|
}
|
|
|
|
virtual void get_supports(const Vector2 &p_normal, Vector2 *r_supports, int &r_amount) const override;
|
|
|
|
virtual bool contains_point(const Vector2 &p_point) const override;
|
|
virtual bool intersect_segment(const Vector2 &p_begin, const Vector2 &p_end, Vector2 &r_point, Vector2 &r_normal) const override;
|
|
|
|
virtual real_t get_moment_of_inertia(real_t p_mass, const Size2 &p_scale) const override { return 0; }
|
|
|
|
virtual void set_data(const Variant &p_data) override;
|
|
virtual Variant get_data() const override;
|
|
|
|
virtual void cull(const Rect2 &p_local_aabb, QueryCallback p_callback, void *p_userdata) const override;
|
|
|
|
DEFAULT_PROJECT_RANGE_CAST
|
|
};
|
|
|
|
#undef DEFAULT_PROJECT_RANGE_CAST
|
|
|
|
#endif // GODOT_SHAPE_2D_H
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