bool VoxelProjectedPolygon::occludes(const VoxelProjectedPolygon& occludee, bool checkAllInView) const {
// if we are completely out of view, then we definitely don't occlude!
// if the occludee is completely out of view, then we also don't occlude it
//
// this is true, but unfortunately, we're not quite handling projects in the
// case when SOME points are in view and others are not. So, we will not consider
// occlusion for any shadows that are partially in view.
if (checkAllInView && (!getAllInView() || !occludee.getAllInView())) {
return false;
}
// first check the bounding boxes, the occludee must be fully within the boounding box of this shadow
if ((occludee.getMaxX() > getMaxX()) ||
(occludee.getMaxY() > getMaxY()) ||
(occludee.getMinX() < getMinX()) ||
(occludee.getMinY() < getMinY())) {
return false;
}
// if we got this far, then check each vertex of the occludee, if all those points
// are inside our polygon, then the tested occludee is fully occluded
for(int i = 0; i < occludee.getVertexCount(); i++) {
if (!pointInside(occludee.getVertex(i))) {
return false;
}
}
// if we got this far, then indeed the occludee is fully occluded by us
return true;
}
