Function TileHandler.ClipAgainstRectangle
        
                ClipAgainstRectangle
        
                (UnsafeSpan<Int3> clipIn, UnsafeSpan<Int3> clipTmp, Vector2Int size)
    
            
            Clips the input polygon against a rectangle with one corner at the origin and one at size in XZ space.
                Private
                    Static
            
        int ClipAgainstRectangle (
clipIn  |         Input vertices. Output will also be placed here.  | 
                |
clipTmp  |         Temporary vertices. This buffer must be large enough to contain all output vertices.  | 
                |
Vector2Int  |     size  |         The clipping rectangle has one corner at the origin and one at this position in XZ space.  | 
                
Clips the input polygon against a rectangle with one corner at the origin and one at size in XZ space.
Return
Number of output vertices