public CCPhysicsShapeEdgePolygon(CCPoint[] vec, int count, CCPhysicsMaterial material, float border = 1)
{
_type = PhysicsType.EDGEPOLYGEN;
int i = 0;
var vecs = PhysicsHelper.CCPointsTocpVects(vec);
for (; i < count; ++i)
{
cpShape shape = new cpSegmentShape(CCPhysicsShapeInfo.SharedBody, vecs[i], vecs[(i + 1) % count],
border);
if (shape == null)
{
break;
}
shape.SetElasticity(1.0f);
shape.SetFriction(1.0f);
_info.Add(shape);
}
_mass = cp.Infinity;
_moment = cp.Infinity;
Material = material;
}
public static float CalculateMoment(float mass, CCPoint[] vecs, int count, CCPoint offset)
{
float moment = mass == cp.Infinity ? cp.Infinity
: cp.MomentForPoly(mass, count, PhysicsHelper.CCPointsTocpVects(vecs), PhysicsHelper.CCPointToCpVect(offset), 0.0f);
return(moment);
}
/** move the points to the center */
public static void RecenterPoints(CCPoint[] points, int count, CCPoint center)
{
var cpPoints = PhysicsHelper.CCPointsTocpVects(points);
cp.RecenterPoly(count, cpPoints);
points = PhysicsHelper.cpVectsTpCCPoints(cpPoints);
if (center != CCPoint.Zero)
{
for (int i = 0; i < points.Length; ++i)
{
points[i] += center;
}
}
}
public void Init(CCPoint[] vecs, int count, CCPhysicsMaterial material, float radius)
{
_type = PhysicsType.POLYGEN;
cpShape shape = new cpPolyShape(CCPhysicsShapeInfo.SharedBody, count, PhysicsHelper.CCPointsTocpVects(vecs), radius);
_info.Add(shape);
_area = CalculateArea();
_mass = material.density == cp.Infinity ? cp.Infinity : material.density * _area;
_moment = CalculateDefaultMoment();
Material = material;
}
public CCPhysicsShapeEdgeChain(CCPoint[] vec, int count, CCPhysicsMaterial material, float border = 1)
{
_type = PhysicsType.EDGECHAIN;
var vecs = PhysicsHelper.CCPointsTocpVects(vec);
int i = 0;
for (; i < count; ++i)
{
cpShape shape = new cpSegmentShape(CCPhysicsShapeInfo.getSharedBody(), vecs[i], vecs[i + 1],
border);
shape.SetElasticity(1.0f);
shape.SetFriction(1.0f);
_info.add(shape);
}
_mass = cp.Infinity;
_moment = cp.Infinity;
SetMaterial(material);
}
/** get center of the polyon points */
public static CCPoint GetPolygonCenter(CCPoint[] points, int count)
{
return(PhysicsHelper.cpVectToCCPoint(cp.CentroidForPoly(count, PhysicsHelper.CCPointsTocpVects(points))));
}
