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Diffstat (limited to 'Source/3rdParty/Box2D/Dynamics/Contacts/b2Contact.h')
| -rw-r--r-- | Source/3rdParty/Box2D/Dynamics/Contacts/b2Contact.h | 349 |
1 files changed, 0 insertions, 349 deletions
diff --git a/Source/3rdParty/Box2D/Dynamics/Contacts/b2Contact.h b/Source/3rdParty/Box2D/Dynamics/Contacts/b2Contact.h deleted file mode 100644 index df23d3c..0000000 --- a/Source/3rdParty/Box2D/Dynamics/Contacts/b2Contact.h +++ /dev/null @@ -1,349 +0,0 @@ -/* -* Copyright (c) 2006-2009 Erin Catto http://www.box2d.org -* -* This software is provided 'as-is', without any express or implied -* warranty. In no event will the authors be held liable for any damages -* arising from the use of this software. -* Permission is granted to anyone to use this software for any purpose, -* including commercial applications, and to alter it and redistribute it -* freely, subject to the following restrictions: -* 1. The origin of this software must not be misrepresented; you must not -* claim that you wrote the original software. If you use this software -* in a product, an acknowledgment in the product documentation would be -* appreciated but is not required. -* 2. Altered source versions must be plainly marked as such, and must not be -* misrepresented as being the original software. -* 3. This notice may not be removed or altered from any source distribution. -*/ - -#ifndef B2_CONTACT_H -#define B2_CONTACT_H - -#include "Box2D/Common/b2Math.h" -#include "Box2D/Collision/b2Collision.h" -#include "Box2D/Collision/Shapes/b2Shape.h" -#include "Box2D/Dynamics/b2Fixture.h" - -class b2Body; -class b2Contact; -class b2Fixture; -class b2World; -class b2BlockAllocator; -class b2StackAllocator; -class b2ContactListener; - -/// Friction mixing law. The idea is to allow either fixture to drive the friction to zero. -/// For example, anything slides on ice. -inline float32 b2MixFriction(float32 friction1, float32 friction2) -{ - return b2Sqrt(friction1 * friction2); -} - -/// Restitution mixing law. The idea is allow for anything to bounce off an inelastic surface. -/// For example, a superball bounces on anything. -inline float32 b2MixRestitution(float32 restitution1, float32 restitution2) -{ - return restitution1 > restitution2 ? restitution1 : restitution2; -} - -typedef b2Contact* b2ContactCreateFcn( b2Fixture* fixtureA, int32 indexA, - b2Fixture* fixtureB, int32 indexB, - b2BlockAllocator* allocator); -typedef void b2ContactDestroyFcn(b2Contact* contact, b2BlockAllocator* allocator); - -struct b2ContactRegister -{ - b2ContactCreateFcn* createFcn; - b2ContactDestroyFcn* destroyFcn; - bool primary; -}; - -/// A contact edge is used to connect bodies and contacts together -/// in a contact graph where each body is a node and each contact -/// is an edge. A contact edge belongs to a doubly linked list -/// maintained in each attached body. Each contact has two contact -/// nodes, one for each attached body. -struct b2ContactEdge -{ - b2Body* other; ///< provides quick access to the other body attached. - b2Contact* contact; ///< the contact - b2ContactEdge* prev; ///< the previous contact edge in the body's contact list - b2ContactEdge* next; ///< the next contact edge in the body's contact list -}; - -/// The class manages contact between two shapes. A contact exists for each overlapping -/// AABB in the broad-phase (except if filtered). Therefore a contact object may exist -/// that has no contact points. -class b2Contact -{ -public: - - /// Get the contact manifold. Do not modify the manifold unless you understand the - /// internals of Box2D. - b2Manifold* GetManifold(); - const b2Manifold* GetManifold() const; - - /// Get the world manifold. - void GetWorldManifold(b2WorldManifold* worldManifold) const; - - /// Is this contact touching? - bool IsTouching() const; - - /// Enable/disable this contact. This can be used inside the pre-solve - /// contact listener. The contact is only disabled for the current - /// time step (or sub-step in continuous collisions). - void SetEnabled(bool flag); - - /// Has this contact been disabled? - bool IsEnabled() const; - - /// Get the next contact in the world's contact list. - b2Contact* GetNext(); - const b2Contact* GetNext() const; - - /// Get fixture A in this contact. - b2Fixture* GetFixtureA(); - const b2Fixture* GetFixtureA() const; - - /// Get the child primitive index for fixture A. - int32 GetChildIndexA() const; - - /// Get fixture B in this contact. - b2Fixture* GetFixtureB(); - const b2Fixture* GetFixtureB() const; - - /// Get the child primitive index for fixture B. - int32 GetChildIndexB() const; - - /// Override the default friction mixture. You can call this in b2ContactListener::PreSolve. - /// This value persists until set or reset. - void SetFriction(float32 friction); - - /// Get the friction. - float32 GetFriction() const; - - /// Reset the friction mixture to the default value. - void ResetFriction(); - - /// Override the default restitution mixture. You can call this in b2ContactListener::PreSolve. - /// The value persists until you set or reset. - void SetRestitution(float32 restitution); - - /// Get the restitution. - float32 GetRestitution() const; - - /// Reset the restitution to the default value. - void ResetRestitution(); - - /// Set the desired tangent speed for a conveyor belt behavior. In meters per second. - void SetTangentSpeed(float32 speed); - - /// Get the desired tangent speed. In meters per second. - float32 GetTangentSpeed() const; - - /// Evaluate this contact with your own manifold and transforms. - virtual void Evaluate(b2Manifold* manifold, const b2Transform& xfA, const b2Transform& xfB) = 0; - -protected: - friend class b2ContactManager; - friend class b2World; - friend class b2ContactSolver; - friend class b2Body; - friend class b2Fixture; - - // Flags stored in m_flags - enum - { - // Used when crawling contact graph when forming islands. - e_islandFlag = 0x0001, - - // Set when the shapes are touching. - e_touchingFlag = 0x0002, - - // This contact can be disabled (by user) - e_enabledFlag = 0x0004, - - // This contact needs filtering because a fixture filter was changed. - e_filterFlag = 0x0008, - - // This bullet contact had a TOI event - e_bulletHitFlag = 0x0010, - - // This contact has a valid TOI in m_toi - e_toiFlag = 0x0020 - }; - - /// Flag this contact for filtering. Filtering will occur the next time step. - void FlagForFiltering(); - - static void AddType(b2ContactCreateFcn* createFcn, b2ContactDestroyFcn* destroyFcn, - b2Shape::Type typeA, b2Shape::Type typeB); - static void InitializeRegisters(); - static b2Contact* Create(b2Fixture* fixtureA, int32 indexA, b2Fixture* fixtureB, int32 indexB, b2BlockAllocator* allocator); - static void Destroy(b2Contact* contact, b2Shape::Type typeA, b2Shape::Type typeB, b2BlockAllocator* allocator); - static void Destroy(b2Contact* contact, b2BlockAllocator* allocator); - - b2Contact() : m_fixtureA(nullptr), m_fixtureB(nullptr) {} - b2Contact(b2Fixture* fixtureA, int32 indexA, b2Fixture* fixtureB, int32 indexB); - virtual ~b2Contact() {} - - void Update(b2ContactListener* listener); - - static b2ContactRegister s_registers[b2Shape::e_typeCount][b2Shape::e_typeCount]; - static bool s_initialized; - - uint32 m_flags; - - // World pool and list pointers. - b2Contact* m_prev; - b2Contact* m_next; - - // Nodes for connecting bodies. - b2ContactEdge m_nodeA; - b2ContactEdge m_nodeB; - - b2Fixture* m_fixtureA; - b2Fixture* m_fixtureB; - - int32 m_indexA; - int32 m_indexB; - - b2Manifold m_manifold; - - int32 m_toiCount; - float32 m_toi; - - float32 m_friction; - float32 m_restitution; - - float32 m_tangentSpeed; -}; - -inline b2Manifold* b2Contact::GetManifold() -{ - return &m_manifold; -} - -inline const b2Manifold* b2Contact::GetManifold() const -{ - return &m_manifold; -} - -inline void b2Contact::GetWorldManifold(b2WorldManifold* worldManifold) const -{ - const b2Body* bodyA = m_fixtureA->GetBody(); - const b2Body* bodyB = m_fixtureB->GetBody(); - const b2Shape* shapeA = m_fixtureA->GetShape(); - const b2Shape* shapeB = m_fixtureB->GetShape(); - - worldManifold->Initialize(&m_manifold, bodyA->GetTransform(), shapeA->m_radius, bodyB->GetTransform(), shapeB->m_radius); -} - -inline void b2Contact::SetEnabled(bool flag) -{ - if (flag) - { - m_flags |= e_enabledFlag; - } - else - { - m_flags &= ~e_enabledFlag; - } -} - -inline bool b2Contact::IsEnabled() const -{ - return (m_flags & e_enabledFlag) == e_enabledFlag; -} - -inline bool b2Contact::IsTouching() const -{ - return (m_flags & e_touchingFlag) == e_touchingFlag; -} - -inline b2Contact* b2Contact::GetNext() -{ - return m_next; -} - -inline const b2Contact* b2Contact::GetNext() const -{ - return m_next; -} - -inline b2Fixture* b2Contact::GetFixtureA() -{ - return m_fixtureA; -} - -inline const b2Fixture* b2Contact::GetFixtureA() const -{ - return m_fixtureA; -} - -inline b2Fixture* b2Contact::GetFixtureB() -{ - return m_fixtureB; -} - -inline int32 b2Contact::GetChildIndexA() const -{ - return m_indexA; -} - -inline const b2Fixture* b2Contact::GetFixtureB() const -{ - return m_fixtureB; -} - -inline int32 b2Contact::GetChildIndexB() const -{ - return m_indexB; -} - -inline void b2Contact::FlagForFiltering() -{ - m_flags |= e_filterFlag; -} - -inline void b2Contact::SetFriction(float32 friction) -{ - m_friction = friction; -} - -inline float32 b2Contact::GetFriction() const -{ - return m_friction; -} - -inline void b2Contact::ResetFriction() -{ - m_friction = b2MixFriction(m_fixtureA->m_friction, m_fixtureB->m_friction); -} - -inline void b2Contact::SetRestitution(float32 restitution) -{ - m_restitution = restitution; -} - -inline float32 b2Contact::GetRestitution() const -{ - return m_restitution; -} - -inline void b2Contact::ResetRestitution() -{ - m_restitution = b2MixRestitution(m_fixtureA->m_restitution, m_fixtureB->m_restitution); -} - -inline void b2Contact::SetTangentSpeed(float32 speed) -{ - m_tangentSpeed = speed; -} - -inline float32 b2Contact::GetTangentSpeed() const -{ - return m_tangentSpeed; -} - -#endif |