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axmol/cocos/physics/CCPhysicsShape.cpp

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/****************************************************************************
Copyright (c) 2013 cocos2d-x.org
http://www.cocos2d-x.org
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 "CCPhysicsShape.h"
#ifdef CC_USE_PHYSICS
#include <climits>
#include "chipmunk.h"
#include "CCPhysicsBody.h"
#include "CCPhysicsWorld.h"
#include "chipmunk/CCPhysicsBodyInfo_chipmunk.h"
#include "chipmunk/CCPhysicsShapeInfo_chipmunk.h"
#include "chipmunk/CCPhysicsHelper_chipmunk.h"
NS_CC_BEGIN
extern const float PHYSICS_INFINITY;
PhysicsShape::PhysicsShape()
: _body(nullptr)
, _info(nullptr)
, _type(Type::UNKNOWN)
, _area(0)
, _mass(0)
, _moment(0)
, _tag(0)
, _categoryBitmask(UINT_MAX)
, _collisionBitmask(UINT_MAX)
, _contactTestBitmask(UINT_MAX)
, _group(0)
{
}
PhysicsShape::~PhysicsShape()
{
CC_SAFE_DELETE(_info);
}
bool PhysicsShape::init(Type type)
{
_info = new PhysicsShapeInfo(this);
if (_info == nullptr) return false;
_type = type;
return true;
}
void PhysicsShape::setMass(float mass)
{
if (mass < 0)
{
return;
}
if (_body)
{
_body->addMass(-_mass);
_body->addMass(mass);
};
_mass = mass;
}
void PhysicsShape::setMoment(float moment)
{
if (moment < 0)
{
return;
}
if (_body)
{
_body->addMoment(-_moment);
_body->addMoment(moment);
};
_moment = moment;
}
void PhysicsShape::setMaterial(const PhysicsMaterial& material)
{
setDensity(material.density);
setRestitution(material.restitution);
setFriction(material.friction);
}
PhysicsBodyInfo* PhysicsShape::bodyInfo() const
{
if (_body != nullptr)
{
return _body->_info;
}else
{
return nullptr;
}
}
PhysicsShapeCircle::PhysicsShapeCircle()
{
}
PhysicsShapeCircle::~PhysicsShapeCircle()
{
}
PhysicsShapeBox::PhysicsShapeBox()
{
}
PhysicsShapeBox::~PhysicsShapeBox()
{
}
PhysicsShapePolygon::PhysicsShapePolygon()
{
}
PhysicsShapePolygon::~PhysicsShapePolygon()
{
}
PhysicsShapeEdgeBox::PhysicsShapeEdgeBox()
{
}
PhysicsShapeEdgeBox::~PhysicsShapeEdgeBox()
{
}
PhysicsShapeEdgeChain::PhysicsShapeEdgeChain()
{
}
PhysicsShapeEdgeChain::~PhysicsShapeEdgeChain()
{
}
PhysicsShapeEdgePolygon::PhysicsShapeEdgePolygon()
{
}
PhysicsShapeEdgePolygon::~PhysicsShapeEdgePolygon()
{
}
PhysicsShapeEdgeSegment::PhysicsShapeEdgeSegment()
{
}
PhysicsShapeEdgeSegment::~PhysicsShapeEdgeSegment()
{
}
void PhysicsShape::setDensity(float density)
{
if (density < 0)
{
return;
}
_material.density = density;
if (_material.density == PHYSICS_INFINITY)
{
setMass(PHYSICS_INFINITY);
}else if (_area > 0)
{
setMass(PhysicsHelper::float2cpfloat(_material.density * _area));
}
}
void PhysicsShape::setRestitution(float restitution)
{
_material.restitution = restitution;
for (cpShape* shape : _info->getShapes())
{
cpShapeSetElasticity(shape, PhysicsHelper::float2cpfloat(restitution));
}
}
void PhysicsShape::setFriction(float friction)
{
_material.friction = friction;
for (cpShape* shape : _info->getShapes())
{
cpShapeSetFriction(shape, PhysicsHelper::float2cpfloat(friction));
}
}
Point* PhysicsShape::recenterPoints(Point* points, int count, const Point& center)
{
cpVect* cpvs = new cpVect[count];
cpRecenterPoly(count, PhysicsHelper::points2cpvs(points, cpvs, count));
PhysicsHelper::cpvs2points(cpvs, points, count);
delete[] cpvs;
if (center != Point::ZERO)
{
for (int i = 0; i < count; ++i)
{
points[i] += center;
}
}
return points;
}
Point PhysicsShape::getPolyonCenter(const Point* points, int count)
{
cpVect* cpvs = new cpVect[count];
cpVect center = cpCentroidForPoly(count, PhysicsHelper::points2cpvs(points, cpvs, count));
delete[] cpvs;
return PhysicsHelper::cpv2point(center);
}
void PhysicsShape::setBody(PhysicsBody *body)
{
// already added
if (body != nullptr && _body == body)
{
return;
}
if (_body != nullptr)
{
_body->removeShape(this);
}
if (body == nullptr)
{
_info->setBody(nullptr);
_body = nullptr;
}else
{
_info->setBody(body->_info->getBody());
_body = body;
}
}
// PhysicsShapeCircle
PhysicsShapeCircle* PhysicsShapeCircle::create(float radius, const PhysicsMaterial& material/* = MaterialDefault*/, const Point& offset/* = Point(0, 0)*/)
{
PhysicsShapeCircle* shape = new PhysicsShapeCircle();
if (shape && shape->init(radius, material, offset))
{
shape->autorelease();
return shape;
}
CC_SAFE_DELETE(shape);
return nullptr;
}
bool PhysicsShapeCircle::init(float radius, const PhysicsMaterial& material/* = MaterialDefault*/, const Point& offset /*= Point(0, 0)*/)
{
do
{
CC_BREAK_IF(!PhysicsShape::init(Type::CIRCLE));
cpShape* shape = cpCircleShapeNew(_info->getSharedBody(), radius, PhysicsHelper::point2cpv(offset));
CC_BREAK_IF(shape == nullptr);
_info->add(shape);
_area = calculateDefaultArea();
_mass = material.density == PHYSICS_INFINITY ? PHYSICS_INFINITY : material.density * _area;
_moment = calculateDefaultMoment();
setMaterial(material);
return true;
} while (false);
return false;
}
float PhysicsShapeCircle::calculateArea(float radius)
{
return PhysicsHelper::cpfloat2float(cpAreaForCircle(0, radius));
}
float PhysicsShapeCircle::calculateMoment(float mass, float radius, const Point& offset)
{
return mass == PHYSICS_INFINITY ? PHYSICS_INFINITY
: PhysicsHelper::cpfloat2float(cpMomentForCircle(PhysicsHelper::float2cpfloat(mass),
0,
PhysicsHelper::float2cpfloat(radius),
PhysicsHelper::point2cpv(offset)));
}
float PhysicsShapeCircle::calculateDefaultArea()
{
return PhysicsHelper::cpfloat2float(cpAreaForCircle(0, cpCircleShapeGetRadius(_info->getShapes().front())));
}
float PhysicsShapeCircle::calculateDefaultMoment()
{
cpShape* shape = _info->getShapes().front();
return _mass == PHYSICS_INFINITY ? PHYSICS_INFINITY
: PhysicsHelper::cpfloat2float(cpMomentForCircle(PhysicsHelper::float2cpfloat(_mass),
0,
cpCircleShapeGetRadius(shape),
cpCircleShapeGetOffset(shape)));
}
float PhysicsShapeCircle::getRadius() const
{
return PhysicsHelper::cpfloat2float(cpCircleShapeGetRadius(_info->getShapes().front()));
}
Point PhysicsShapeCircle::getOffset()
{
return PhysicsHelper::cpv2point(cpCircleShapeGetOffset(_info->getShapes().front()));
}
// PhysicsShapeEdgeSegment
PhysicsShapeEdgeSegment* PhysicsShapeEdgeSegment::create(const Point& a, const Point& b, const PhysicsMaterial& material/* = MaterialDefault*/, float border/* = 1*/)
{
PhysicsShapeEdgeSegment* shape = new PhysicsShapeEdgeSegment();
if (shape && shape->init(a, b, material, border))
{
shape->autorelease();
return shape;
}
CC_SAFE_DELETE(shape);
return nullptr;
}
bool PhysicsShapeEdgeSegment::init(const Point& a, const Point& b, const PhysicsMaterial& material/* = MaterialDefault*/, float border/* = 1*/)
{
do
{
CC_BREAK_IF(!PhysicsShape::init(Type::EDGESEGMENT));
cpShape* shape = cpSegmentShapeNew(_info->getSharedBody(),
PhysicsHelper::point2cpv(a),
PhysicsHelper::point2cpv(b),
PhysicsHelper::float2cpfloat(border));
CC_BREAK_IF(shape == nullptr);
_info->add(shape);
_mass = PHYSICS_INFINITY;
_moment = PHYSICS_INFINITY;
_center = a.getMidpoint(b);
setMaterial(material);
return true;
} while (false);
return false;
}
Point PhysicsShapeEdgeSegment::getPointA() const
{
return PhysicsHelper::cpv2point(((cpSegmentShape*)(_info->getShapes().front()))->ta);
}
Point PhysicsShapeEdgeSegment::getPointB() const
{
return PhysicsHelper::cpv2point(((cpSegmentShape*)(_info->getShapes().front()))->tb);
}
Point PhysicsShapeEdgeSegment::getCenter()
{
return _center;
}
// PhysicsShapeBox
PhysicsShapeBox* PhysicsShapeBox::create(const Size& size, const PhysicsMaterial& material/* = MaterialDefault*/, const Point& offset/* = Point(0, 0)*/)
{
PhysicsShapeBox* shape = new PhysicsShapeBox();
if (shape && shape->init(size, material, offset))
{
shape->autorelease();
return shape;
}
CC_SAFE_DELETE(shape);
return nullptr;
}
bool PhysicsShapeBox::init(const Size& size, const PhysicsMaterial& material/* = MaterialDefault*/, const Point& offset /*= Point(0, 0)*/)
{
do
{
CC_BREAK_IF(!PhysicsShape::init(Type::BOX));
cpVect wh = PhysicsHelper::size2cpv(size);
cpVect vec[4] =
{
{-wh.x/2.0f, -wh.y/2.0f}, {-wh.x/2.0f, wh.y/2.0f}, {wh.x/2.0f, wh.y/2.0f}, {wh.x/2.0f, -wh.y/2.0f}
};
cpShape* shape = cpPolyShapeNew(_info->getSharedBody(), 4, vec, PhysicsHelper::point2cpv(offset));
CC_BREAK_IF(shape == nullptr);
_info->add(shape);
_offset = offset;
_area = calculateDefaultArea();
_mass = material.density == PHYSICS_INFINITY ? PHYSICS_INFINITY : material.density * _area;
_moment = calculateDefaultMoment();
setMaterial(material);
return true;
} while (false);
return false;
}
float PhysicsShapeBox::calculateArea(const Size& size)
{
cpVect wh = PhysicsHelper::size2cpv(size);
cpVect vec[4] =
{
{-wh.x/2.0f, -wh.y/2.0f}, {-wh.x/2.0f, wh.y/2.0f}, {wh.x/2.0f, wh.y/2.0f}, {wh.x/2.0f, -wh.y/2.0f}
};
return PhysicsHelper::cpfloat2float(cpAreaForPoly(4, vec));
}
float PhysicsShapeBox::calculateMoment(float mass, const Size& size, const Point& offset)
{
cpVect wh = PhysicsHelper::size2cpv(size);
cpVect vec[4] =
{
{-wh.x/2.0f, -wh.y/2.0f}, {-wh.x/2.0f, wh.y/2.0f}, {wh.x/2.0f, wh.y/2.0f}, {wh.x/2.0f, -wh.y/2.0f}
};
return mass == PHYSICS_INFINITY ? PHYSICS_INFINITY
: PhysicsHelper::cpfloat2float(cpMomentForPoly(PhysicsHelper::float2cpfloat(mass),
4,
vec,
PhysicsHelper::point2cpv(offset)));
}
float PhysicsShapeBox::calculateDefaultArea()
{
cpShape* shape = _info->getShapes().front();
return PhysicsHelper::cpfloat2float(cpAreaForPoly(((cpPolyShape*)shape)->numVerts, ((cpPolyShape*)shape)->verts));
}
float PhysicsShapeBox::calculateDefaultMoment()
{
cpShape* shape = _info->getShapes().front();
return _mass == PHYSICS_INFINITY ? PHYSICS_INFINITY
: PhysicsHelper::cpfloat2float(cpMomentForPoly(_mass, ((cpPolyShape*)shape)->numVerts, ((cpPolyShape*)shape)->verts, cpvzero));
}
void PhysicsShapeBox::getPoints(Point* points) const
{
cpShape* shape = _info->getShapes().front();
PhysicsHelper::cpvs2points(((cpPolyShape*)shape)->verts, points, ((cpPolyShape*)shape)->numVerts);
}
Size PhysicsShapeBox::getSize() const
{
cpShape* shape = _info->getShapes().front();
return PhysicsHelper::cpv2size(cpv(cpvdist(cpPolyShapeGetVert(shape, 0), cpPolyShapeGetVert(shape, 1)),
cpvdist(cpPolyShapeGetVert(shape, 1), cpPolyShapeGetVert(shape, 2))));
}
// PhysicsShapePolygon
PhysicsShapePolygon* PhysicsShapePolygon::create(const Point* points, int count, const PhysicsMaterial& material/* = MaterialDefault*/, const Point& offset/* = Point(0, 0)*/)
{
PhysicsShapePolygon* shape = new PhysicsShapePolygon();
if (shape && shape->init(points, count, material, offset))
{
shape->autorelease();
return shape;
}
CC_SAFE_DELETE(shape);
return nullptr;
}
bool PhysicsShapePolygon::init(const Point* points, int count, const PhysicsMaterial& material/* = MaterialDefault*/, const Point& offset/* = Point(0, 0)*/)
{
do
{
CC_BREAK_IF(!PhysicsShape::init(Type::POLYGEN));
cpVect* vecs = new cpVect[count];
PhysicsHelper::points2cpvs(points, vecs, count);
cpShape* shape = cpPolyShapeNew(_info->getSharedBody(), count, vecs, PhysicsHelper::point2cpv(offset));
CC_SAFE_DELETE_ARRAY(vecs);
CC_BREAK_IF(shape == nullptr);
_info->add(shape);
_area = calculateDefaultArea();
_mass = material.density == PHYSICS_INFINITY ? PHYSICS_INFINITY : material.density * _area;
_moment = calculateDefaultMoment();
_center = PhysicsHelper::cpv2point(cpCentroidForPoly(((cpPolyShape*)shape)->numVerts, ((cpPolyShape*)shape)->verts));
setMaterial(material);
return true;
} while (false);
return false;
}
float PhysicsShapePolygon::calculateArea(const Point* points, int count)
{
cpVect* vecs = new cpVect[count];
PhysicsHelper::points2cpvs(points, vecs, count);
float area = PhysicsHelper::cpfloat2float(cpAreaForPoly(count, vecs));
CC_SAFE_DELETE_ARRAY(vecs);
return area;
}
float PhysicsShapePolygon::calculateMoment(float mass, const Point* points, int count, const Point& offset)
{
cpVect* vecs = new cpVect[count];
PhysicsHelper::points2cpvs(points, vecs, count);
float moment = mass == PHYSICS_INFINITY ? PHYSICS_INFINITY
: PhysicsHelper::cpfloat2float(cpMomentForPoly(mass, count, vecs, PhysicsHelper::point2cpv(offset)));
CC_SAFE_DELETE_ARRAY(vecs);
return moment;
}
float PhysicsShapePolygon::calculateDefaultArea()
{
cpShape* shape = _info->getShapes().front();
return PhysicsHelper::cpfloat2float(cpAreaForPoly(((cpPolyShape*)shape)->numVerts, ((cpPolyShape*)shape)->verts));
}
float PhysicsShapePolygon::calculateDefaultMoment()
{
cpShape* shape = _info->getShapes().front();
return _mass == PHYSICS_INFINITY ? PHYSICS_INFINITY
: PhysicsHelper::cpfloat2float(cpMomentForPoly(_mass, ((cpPolyShape*)shape)->numVerts, ((cpPolyShape*)shape)->verts, cpvzero));
}
Point PhysicsShapePolygon::getPoint(int i) const
{
return PhysicsHelper::cpv2point(cpPolyShapeGetVert(_info->getShapes().front(), i));
}
void PhysicsShapePolygon::getPoints(Point* outPoints) const
{
cpShape* shape = _info->getShapes().front();
PhysicsHelper::cpvs2points(((cpPolyShape*)shape)->verts, outPoints, ((cpPolyShape*)shape)->numVerts);
}
int PhysicsShapePolygon::getPointsCount() const
{
return ((cpPolyShape*)_info->getShapes().front())->numVerts;
}
Point PhysicsShapePolygon::getCenter()
{
return _center;
}
// PhysicsShapeEdgeBox
PhysicsShapeEdgeBox* PhysicsShapeEdgeBox::create(const Size& size, const PhysicsMaterial& material/* = MaterialDefault*/, float border/* = 1*/, const Point& offset/* = Point(0, 0)*/)
{
PhysicsShapeEdgeBox* shape = new PhysicsShapeEdgeBox();
if (shape && shape->init(size, material, border, offset))
{
shape->autorelease();
return shape;
}
CC_SAFE_DELETE(shape);
return nullptr;
}
bool PhysicsShapeEdgeBox::init(const Size& size, const PhysicsMaterial& material/* = MaterialDefault*/, float border/* = 1*/, const Point& offset/*= Point(0, 0)*/)
{
do
{
CC_BREAK_IF(!PhysicsShape::init(Type::EDGEBOX));
cpVect vec[4] = {};
vec[0] = PhysicsHelper::point2cpv(Point(-size.width/2+offset.x, -size.height/2+offset.y));
vec[1] = PhysicsHelper::point2cpv(Point(+size.width/2+offset.x, -size.height/2+offset.y));
vec[2] = PhysicsHelper::point2cpv(Point(+size.width/2+offset.x, +size.height/2+offset.y));
vec[3] = PhysicsHelper::point2cpv(Point(-size.width/2+offset.x, +size.height/2+offset.y));
int i = 0;
for (; i < 4; ++i)
{
cpShape* shape = cpSegmentShapeNew(_info->getSharedBody(), vec[i], vec[(i+1)%4],
PhysicsHelper::float2cpfloat(border));
CC_BREAK_IF(shape == nullptr);
_info->add(shape);
}
CC_BREAK_IF(i < 4);
_offset = offset;
_mass = PHYSICS_INFINITY;
_moment = PHYSICS_INFINITY;
setMaterial(material);
return true;
} while (false);
return false;
}
// PhysicsShapeEdgeBox
PhysicsShapeEdgePolygon* PhysicsShapeEdgePolygon::create(const Point* points, int count, const PhysicsMaterial& material/* = MaterialDefault*/, float border/* = 1*/)
{
PhysicsShapeEdgePolygon* shape = new PhysicsShapeEdgePolygon();
if (shape && shape->init(points, count, material, border))
{
shape->autorelease();
return shape;
}
CC_SAFE_DELETE(shape);
return nullptr;
}
bool PhysicsShapeEdgePolygon::init(const Point* points, int count, const PhysicsMaterial& material/* = MaterialDefault*/, float border/* = 1*/)
{
cpVect* vec = nullptr;
do
{
CC_BREAK_IF(!PhysicsShape::init(Type::EDGEPOLYGEN));
vec = new cpVect[count];
PhysicsHelper::points2cpvs(points, vec, count);
_center = PhysicsHelper::cpv2point(cpCentroidForPoly(count, vec));
int i = 0;
for (; i < count; ++i)
{
cpShape* shape = cpSegmentShapeNew(_info->getSharedBody(), vec[i], vec[(i+1)%count],
PhysicsHelper::float2cpfloat(border));
CC_BREAK_IF(shape == nullptr);
cpShapeSetElasticity(shape, 1.0f);
cpShapeSetFriction(shape, 1.0f);
_info->add(shape);
}
CC_SAFE_DELETE_ARRAY(vec);
CC_BREAK_IF(i < count);
_mass = PHYSICS_INFINITY;
_moment = PHYSICS_INFINITY;
setMaterial(material);
return true;
} while (false);
CC_SAFE_DELETE_ARRAY(vec);
return false;
}
Point PhysicsShapeEdgePolygon::getCenter()
{
return _center;
}
int PhysicsShapeEdgePolygon::getPointsCount() const
{
return static_cast<int>(_info->getShapes().size() + 1);
}
// PhysicsShapeEdgeChain
PhysicsShapeEdgeChain* PhysicsShapeEdgeChain::create(const Point* points, int count, const PhysicsMaterial& material/* = MaterialDefault*/, float border/* = 1*/)
{
PhysicsShapeEdgeChain* shape = new PhysicsShapeEdgeChain();
if (shape && shape->init(points, count, material, border))
{
shape->autorelease();
return shape;
}
CC_SAFE_DELETE(shape);
return nullptr;
}
bool PhysicsShapeEdgeChain::init(const Point* points, int count, const PhysicsMaterial& material/* = MaterialDefault*/, float border/* = 1*/)
{
cpVect* vec = nullptr;
do
{
CC_BREAK_IF(!PhysicsShape::init(Type::EDGECHAIN));
vec = new cpVect[count];
PhysicsHelper::points2cpvs(points, vec, count);
_center = PhysicsHelper::cpv2point(cpCentroidForPoly(count, vec));
int i = 0;
for (; i < count - 1; ++i)
{
cpShape* shape = cpSegmentShapeNew(_info->getSharedBody(), vec[i], vec[i+1],
PhysicsHelper::float2cpfloat(border));
CC_BREAK_IF(shape == nullptr);
cpShapeSetElasticity(shape, 1.0f);
cpShapeSetFriction(shape, 1.0f);
_info->add(shape);
}
CC_SAFE_DELETE_ARRAY(vec);
CC_BREAK_IF(i < count);
_mass = PHYSICS_INFINITY;
_moment = PHYSICS_INFINITY;
setMaterial(material);
return true;
} while (false);
CC_SAFE_DELETE_ARRAY(vec);
return false;
}
Point PhysicsShapeEdgeChain::getCenter()
{
return _center;
}
int PhysicsShapeEdgeChain::getPointsCount() const
{
return static_cast<int>(_info->getShapes().size() + 1);
}
void PhysicsShape::setGroup(int group)
{
if (group < 0)
{
for (auto shape : _info->getShapes())
{
cpShapeSetGroup(shape, (cpGroup)group);
}
}
_group = group;
}
bool PhysicsShape::containsPoint(const Point& point) const
{
for (auto shape : _info->getShapes())
{
if (cpShapePointQuery(shape, PhysicsHelper::point2cpv(point)))
{
return true;
}
}
return false;
}
NS_CC_END
#endif // CC_USE_PHYSICS
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