bool PhysicsShapePolygon::init(const Vec2* points, int count, const PhysicsMaterial& material/* = MaterialDefault*/, const Vec2& offset/* = Vec2(0, 0)*/, float radius/* = 0.0f*/)
{
do
{
_type = Type::POLYGEN;
auto vecs = new (std::nothrow) cpVect[count];
PhysicsHelper::points2cpvs(points, vecs, count); //count = cpConvexHull((int)count, vecs, nullptr, nullptr, 0);
cpTransform transform = cpTransformTranslate(PhysicsHelper::point2cpv(offset));
auto shape = cpPolyShapeNew(s_sharedBody, count, vecs, transform, radius);
CC_SAFE_DELETE_ARRAY(vecs);
CC_BREAK_IF(shape == nullptr);
cpShapeSetUserData(shape, this);
addShape(shape);
_area = calculateArea();
_mass = material.density == PHYSICS_INFINITY ? PHYSICS_INFINITY : material.density * _area;
_moment = calculateDefaultMoment();
setMaterial(material);
return true;
} while (false);
return false;
}
bool PhysicsShapePolygon::init(const Vec2* points, int count, const PhysicsMaterial& material/* = MaterialDefault*/, const Vec2& offset/* = Vec2(0, 0)*/)
{
do
{
_type = Type::POLYGEN;
auto vecs = new cpVect[count];
PhysicsHelper::points2cpvs(points, vecs, count);
auto shape = cpPolyShapeNew(s_sharedBody, count, vecs, PhysicsHelper::point2cpv(offset));
CC_SAFE_DELETE_ARRAY(vecs);
CC_BREAK_IF(shape == nullptr);
addShape(shape);
_area = calculateArea();
_mass = material.density == PHYSICS_INFINITY ? PHYSICS_INFINITY : material.density * _area;
_moment = calculateDefaultMoment();
setMaterial(material);
return true;
} while (false);
return false;
}
bool PhysicsShapeBox::init(const Size& size, const PhysicsMaterial& material/* = MaterialDefault*/, const Vec2& offset /*= Vec2(0, 0)*/, float radius/* = 0.0f*/)
{
do
{
_type = Type::BOX;
auto 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}
};
cpTransform transform = cpTransformTranslate(PhysicsHelper::point2cpv(offset));
auto shape = cpPolyShapeNew(s_sharedBody, 4, vec, transform, radius);
CC_BREAK_IF(shape == nullptr);
cpShapeSetUserData(shape, this);
addShape(shape);
_area = calculateArea();
_mass = material.density == PHYSICS_INFINITY ? PHYSICS_INFINITY : material.density * _area;
_moment = calculateDefaultMoment();
setMaterial(material);
return true;
} while (false);
return false;
}
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 = calculateArea();
_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;
}
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 = calculateArea();
_mass = material.density == PHYSICS_INFINITY ? PHYSICS_INFINITY : material.density * _area;
_moment = calculateDefaultMoment();
setMaterial(material);
return true;
} while (false);
return false;
}
void PhysicsShape::setScale(float scaleX, float scaleY)
{
if (fabs(_scaleX - scaleX) > FLT_EPSILON || fabs(_scaleY - scaleY) > FLT_EPSILON)
{
if (_type == Type::CIRCLE && scaleX != scaleY)
{
CCLOG("PhysicsShapeCircle WARNING: CANNOT support setScale with different x and y");
return;
}
_newScaleX = scaleX;
_newScaleY = scaleY;
updateScale();
// re-calculate area and mass
_area = calculateArea();
_mass = _material.density * _area;
_moment = calculateDefaultMoment();
}
}
bool PhysicsShapeCircle::init(float radius, const PhysicsMaterial& material/* = MaterialDefault*/, const Vec2& offset /*= Vec2(0, 0)*/)
{
do
{
_type = Type::CIRCLE;
auto shape = cpCircleShapeNew(s_sharedBody, radius, PhysicsHelper::point2cpv(offset));
CC_BREAK_IF(shape == nullptr);
cpShapeSetUserData(shape, this);
addShape(shape);
_area = calculateArea();
_mass = material.density == PHYSICS_INFINITY ? PHYSICS_INFINITY : material.density * _area;
_moment = calculateDefaultMoment();
setMaterial(material);
return true;
} while (false);
return false;
}
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 = calculateArea();
_mass = material.density == PHYSICS_INFINITY ? PHYSICS_INFINITY : material.density * _area;
_moment = calculateDefaultMoment();
setMaterial(material);
return true;
} while (false);
return false;
}
