//---------------------------------------------------------------------------- bool Culler::IsVisible (const Bound& bound) { if (bound.GetRadius() == 0.0f) { // The node is a dummy node and cannot be visible. return false; } // Start with the last pushed plane, which is potentially the most // restrictive plane. int index = mPlaneQuantity - 1; unsigned int mask = (1 << index); for (int i = 0; i < mPlaneQuantity; ++i, --index, mask >>= 1) { if (mPlaneState & mask) { int side = bound.WhichSide(mPlane[index]); if (side < 0) { // The object is on the negative side of the plane, so // cull it. return false; } if (side > 0) { // The object is on the positive side of plane. There is // no need to compare subobjects against this plane, so // mark it as inactive. mPlaneState &= ~mask; } } } return true; }