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/*
* Copyright (c) 2006-2007 Erin Catto http://www.gphysics.com
*
* 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.
*/
#include "b2Shape.h"
#include "b2CircleShape.h"
#include "b2PolygonShape.h"
#include "b2EdgeShape.h"
#include "../b2Collision.h"
#include "../b2BroadPhase.h"
#include "../../Common/b2BlockAllocator.h"
#include <new>
b2Shape* b2Shape::Create(const b2ShapeDef* def, b2BlockAllocator* allocator)
{
switch (def->type)
{
case e_circleShape:
{
void* mem = allocator->Allocate(sizeof(b2CircleShape));
return new (mem) b2CircleShape(def);
}
case e_polygonShape:
{
void* mem = allocator->Allocate(sizeof(b2PolygonShape));
return new (mem) b2PolygonShape(def);
}
default:
b2Assert(false);
return NULL;
}
}
void b2Shape::Destroy(b2Shape* s, b2BlockAllocator* allocator)
{
b2EdgeShape* edge;
switch (s->GetType())
{
case e_circleShape:
s->~b2Shape();
allocator->Free(s, sizeof(b2CircleShape));
break;
case e_polygonShape:
s->~b2Shape();
allocator->Free(s, sizeof(b2PolygonShape));
break;
case e_edgeShape:
edge = (b2EdgeShape*) s;
if (edge->m_nextEdge != NULL) edge->m_nextEdge->m_prevEdge = NULL;
if (edge->m_prevEdge != NULL) edge->m_prevEdge->m_nextEdge = NULL;
s->~b2Shape();
allocator->Free(s, sizeof(b2EdgeShape));
break;
default:
b2Assert(false);
}
}
b2Shape::b2Shape(const b2ShapeDef* def)
{
m_userData = def->userData;
m_friction = def->friction;
m_restitution = def->restitution;
m_density = def->density;
m_body = NULL;
m_sweepRadius = 0.0f;
m_next = NULL;
m_proxyId = b2_nullProxy;
m_filter = def->filter;
m_isSensor = def->isSensor;
}
b2Shape::~b2Shape()
{
b2Assert(m_proxyId == b2_nullProxy);
}
void b2Shape::CreateProxy(b2BroadPhase* broadPhase, const b2XForm& transform)
{
b2Assert(m_proxyId == b2_nullProxy);
b2AABB aabb;
ComputeAABB(&aabb, transform);
bool inRange = broadPhase->InRange(aabb);
// You are creating a shape outside the world box.
b2Assert(inRange);
if (inRange)
{
m_proxyId = broadPhase->CreateProxy(aabb, this);
}
else
{
m_proxyId = b2_nullProxy;
}
}
void b2Shape::DestroyProxy(b2BroadPhase* broadPhase)
{
if (m_proxyId != b2_nullProxy)
{
broadPhase->DestroyProxy(m_proxyId);
m_proxyId = b2_nullProxy;
}
}
bool b2Shape::Synchronize(b2BroadPhase* broadPhase, const b2XForm& transform1, const b2XForm& transform2)
{
if (m_proxyId == b2_nullProxy)
{
return false;
}
// Compute an AABB that covers the swept shape (may miss some rotation effect).
b2AABB aabb;
ComputeSweptAABB(&aabb, transform1, transform2);
if (broadPhase->InRange(aabb))
{
broadPhase->MoveProxy(m_proxyId, aabb);
return true;
}
else
{
return false;
}
}
void b2Shape::RefilterProxy(b2BroadPhase* broadPhase, const b2XForm& transform)
{
if (m_proxyId == b2_nullProxy)
{
return;
}
broadPhase->DestroyProxy(m_proxyId);
b2AABB aabb;
ComputeAABB(&aabb, transform);
bool inRange = broadPhase->InRange(aabb);
if (inRange)
{
m_proxyId = broadPhase->CreateProxy(aabb, this);
}
else
{
m_proxyId = b2_nullProxy;
}
}
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