b2_circle_contact.cpp

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// 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.
 
#include "b2_circle_contact.h"
#include "box2d/b2_block_allocator.h"
#include "box2d/b2_body.h"
#include "box2d/b2_fixture.h"
#include "box2d/b2_time_of_impact.h"
#include "box2d/b2_world_callbacks.h"
 
#include <new>
 
b2Contact* b2CircleContact::Create(b2Fixture* fixtureA, int32, b2Fixture* fixtureB, int32, b2BlockAllocator* allocator)
{
        void* mem = allocator->Allocate(sizeof(b2CircleContact));
        return new (mem) b2CircleContact(fixtureA, fixtureB);
}
 
void b2CircleContact::Destroy(b2Contact* contact, b2BlockAllocator* allocator)
{
        ((b2CircleContact*)contact)->~b2CircleContact();
        allocator->Free(contact, sizeof(b2CircleContact));
}
 
b2CircleContact::b2CircleContact(b2Fixture* fixtureA, b2Fixture* fixtureB)
        : b2Contact(fixtureA, 0, fixtureB, 0)
{
        b2Assert(m_fixtureA->GetType() == b2Shape::e_circle);
        b2Assert(m_fixtureB->GetType() == b2Shape::e_circle);
}
 
void b2CircleContact::Evaluate(b2Manifold* manifold, const b2Transform& xfA, const b2Transform& xfB)
{
        b2CollideCircles(manifold,
                                        (b2CircleShape*)m_fixtureA->GetShape(), xfA,
                                        (b2CircleShape*)m_fixtureB->GetShape(), xfB);
}