fvec2 GJKCollisionDetector::calcInitialDirection( const Convex& convex1, const Transform2& transform1, const Convex& convex2, const Transform2& transform2) { fvec2 c1 = transform1.getTransformed(convex1.getCenter()); fvec2 c2 = transform2.getTransformed(convex2.getCenter()); return c2 - c1; }