cpPolyShape *
cpPolyShapeInit(cpPolyShape *poly, cpBody *body, int numVerts, const cpVect *verts, cpVect offset)
{
setUpVerts(poly, numVerts, verts, offset);
cpShapeInit((cpShape *)poly, &polyClass, body);
return poly;
}
cpPolyShape *
cpPolyShapeInit2(cpPolyShape *poly, cpBody *body, int numVerts, const cpVect *verts, cpVect offset, cpFloat radius)
{
setUpVerts(poly, numVerts, verts, offset);
cpShapeInit((cpShape *)poly, &polyClass, body);
poly->r = radius;
return poly;
}
cpCircleShape *
cpCircleShapeInit(cpCircleShape *circle, cpBody *body, cpFloat radius, cpVect offset)
{
circle->c = offset;
circle->r = radius;
cpShapeInit((cpShape *)circle, &cpCircleShapeClass, body, cpCircleShapeMassInfo(0.0f, radius, offset));
return circle;
}
cpPolyShape *
cpPolyShapeInitRaw(cpPolyShape *poly, cpBody *body, int count, const cpVect *verts, cpFloat radius)
{
cpShapeInit((cpShape *)poly, &polyClass, body, cpPolyShapeMassInfo(0.0f, count, verts, radius));
SetVerts(poly, count, verts);
poly->r = radius;
return poly;
}
cpPolyShape *
cpPolyShapeInit(cpPolyShape *poly, cpBody *body, int numVerts, cpVect *verts, cpVect offset)
{
// Fail if the user attempts to pass a concave poly, or a bad winding.
assert(cpPolyValidate(verts, numVerts));
setUpVerts(poly, numVerts, verts, offset);
cpShapeInit((cpShape *)poly, &polyClass, body);
return poly;
}
cpSegmentShape *
cpSegmentShapeInit(cpSegmentShape *seg, cpBody *body, cpVect a, cpVect b, cpFloat r)
{
seg->a = a;
seg->b = b;
seg->n = cpvperp(cpvnormalize(cpvsub(b, a)));
seg->r = r;
cpShapeInit((cpShape *)seg, &cpSegmentShapeClass, body);
return seg;
}
cpSegmentShape *
cpSegmentShapeInit(cpSegmentShape *seg, cpBody *body, cpVect a, cpVect b, cpFloat r)
{
seg->a = a;
seg->b = b;
seg->n = cpvrperp(cpvnormalize(cpvsub(b, a)));
seg->r = r;
seg->a_tangent = cpvzero;
seg->b_tangent = cpvzero;
cpShapeInit((cpShape *)seg, &cpSegmentShapeClass, body, cpSegmentShapeMassInfo(0.0f, a, b, r));
return seg;
}
