Carves a filled disc into the bitmap, setting every cell within radius
of (cx, cy) to air (0).
Cells exactly on the radius boundary are included (dx² + dy² ≤ r²).
The bounding box is clipped to bitmap bounds, so callers may pass any
world position; circles that fall fully outside the world are silent
no-ops. Non-positive and NaN radii are no-ops. Sub-pixel center
coordinates are allowed.
Carves a filled disc into the bitmap, setting every cell within
radiusof(cx, cy)to air (0).Cells exactly on the radius boundary are included (
dx² + dy² ≤ r²). The bounding box is clipped to bitmap bounds, so callers may pass any world position; circles that fall fully outside the world are silent no-ops. Non-positive and NaN radii are no-ops. Sub-pixel center coordinates are allowed.