b2_world_callbacks.h

// MIT License
 
// Copyright (c) 2019 Erin Catto
 
// 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.
 
#ifndef B2_WORLD_CALLBACKS_H
#define B2_WORLD_CALLBACKS_H
 
#include "b2_api.h"
#include "b2_settings.h"
 
struct b2Vec2;
struct b2Transform;
class b2Fixture;
class b2Body;
class b2Joint;
class b2Contact;
struct b2ContactResult;
struct b2Manifold;
 
class B2_API b2DestructionListener
{
public:
    virtual ~b2DestructionListener() {}
 
    virtual void SayGoodbye(b2Joint* joint) = 0;
 
    virtual void SayGoodbye(b2Fixture* fixture) = 0;
};
 
class B2_API b2ContactFilter
{
public:
    virtual ~b2ContactFilter() {}
 
    virtual bool ShouldCollide(b2Fixture* fixtureA, b2Fixture* fixtureB);
};
 
struct B2_API b2ContactImpulse
{
    float normalImpulses[b2_maxManifoldPoints];
    float tangentImpulses[b2_maxManifoldPoints];
    int32 count;
};
 
class B2_API b2ContactListener
{
public:
    virtual ~b2ContactListener() {}
 
    virtual void BeginContact(b2Contact* contact) { B2_NOT_USED(contact); }
 
    virtual void EndContact(b2Contact* contact) { B2_NOT_USED(contact); }
 
    virtual void PreSolve(b2Contact* contact, const b2Manifold* oldManifold)
    {
        B2_NOT_USED(contact);
        B2_NOT_USED(oldManifold);
    }
 
    virtual void PostSolve(b2Contact* contact, const b2ContactImpulse* impulse)
    {
        B2_NOT_USED(contact);
        B2_NOT_USED(impulse);
    }
};
 
class B2_API b2QueryCallback
{
public:
    virtual ~b2QueryCallback() {}
 
    virtual bool ReportFixture(b2Fixture* fixture) = 0;
};
 
class B2_API b2RayCastCallback
{
public:
    virtual ~b2RayCastCallback() {}
 
    virtual float ReportFixture(    b2Fixture* fixture, const b2Vec2& point,
                                    const b2Vec2& normal, float fraction) = 0;
};
 
#endif