104 lines
3.5 KiB
C++
104 lines
3.5 KiB
C++
//
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// Created by Иван Ильин on 05.02.2021.
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//
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#ifndef ENGINE_RIGIDBODY_H
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#define ENGINE_RIGIDBODY_H
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#include <utility>
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#include <vector>
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#include <memory>
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#include <functional>
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#include "../Triangle.h"
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#include "Simplex.h"
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#include "../Mesh.h"
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#include "HitBox.h"
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struct CollisionPoint final {
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const Vec3D normal;
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const double depth;
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};
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struct FaceNormal final {
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const Vec3D normal;
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const double distance;
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};
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struct NextSimplex final {
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const Simplex newSimplex;
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const Vec3D newDirection;
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const bool finishSearching;
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};
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class RigidBody : public Mesh {
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private:
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Vec3D _velocity{0, 0, 0};
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Vec3D _acceleration{0, 0, 0};
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bool _hasCollision = false;
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bool _isCollider = true;
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bool _isTrigger = false;
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HitBox _hitBox{};
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bool _inCollision = false;
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Vec3D _collisionNormal{0, 0, 0};
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Vec3D _findFurthestPoint(const Vec3D &direction);
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Vec3D _support(std::shared_ptr<RigidBody> obj, const Vec3D &direction);
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std::function<void(const ObjectNameTag &, std::shared_ptr<RigidBody>)> _collisionCallBack;
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static NextSimplex _nextSimplex(const Simplex &points);
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static NextSimplex _lineCase(const Simplex &points);
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static NextSimplex _triangleCase(const Simplex &points);
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static NextSimplex _tetrahedronCase(const Simplex &points);
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static std::pair<std::vector<FaceNormal>, size_t>
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_getFaceNormals(const std::vector<Vec3D> &polytope, const std::vector<size_t> &faces);
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static std::vector<std::pair<size_t, size_t>>
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_addIfUniqueEdge(const std::vector<std::pair<size_t, size_t>> &edges, const std::vector<size_t> &faces, size_t a,
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size_t b);
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public:
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explicit RigidBody(ObjectNameTag nameTag) : Mesh(std::move(nameTag)) {};
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RigidBody(const RigidBody &rigidBody) = default;
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explicit RigidBody(const Mesh &mesh, bool useSimpleBox = true);
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RigidBody(ObjectNameTag nameTag, const std::string &filename, const Vec3D &scale = Vec3D{1, 1, 1}, bool useSimpleBox = true);
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[[nodiscard]] std::pair<bool, Simplex> checkGJKCollision(std::shared_ptr<RigidBody> obj);
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[[nodiscard]] CollisionPoint EPA(const Simplex &simplex, std::shared_ptr<RigidBody> obj);
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void solveCollision(const CollisionPoint &collision);
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[[nodiscard]] Vec3D collisionNormal() const { return _collisionNormal; }
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[[nodiscard]] bool hasCollision() const { return _hasCollision; }
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[[nodiscard]] bool inCollision() const { return _inCollision; }
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[[nodiscard]] bool isCollider() const { return _isCollider; }
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[[nodiscard]] bool isTrigger() const { return _isTrigger; }
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void setInCollision(bool c) { _inCollision = c; }
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void setCollision(bool c) { _hasCollision = c; }
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void setCollider(bool c) { _isCollider = c; }
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void setTrigger(bool t) { _isTrigger = t; }
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void updatePhysicsState();
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void setVelocity(const Vec3D &velocity);
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void addVelocity(const Vec3D &velocity);
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void setAcceleration(const Vec3D &acceleration);
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[[nodiscard]] Vec3D velocity() const { return _velocity; }
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[[nodiscard]] Vec3D acceleration() const { return _acceleration; }
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[[nodiscard]] const std::function<void(const ObjectNameTag &, std::shared_ptr<RigidBody>)> &
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collisionCallBack() const { return _collisionCallBack; }
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void setCollisionCallBack(const std::function<void(const ObjectNameTag &tag,
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std::shared_ptr<RigidBody>)> &f) { _collisionCallBack = f; }
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~RigidBody() override = default;
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};
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#endif //INC_3DZAVR_RIGIDBODY_H
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