Pencil Code Reference > clip
clip will remove all parts of an object outside the convex hull.
Essentially, the convex hull looks like the edge of a rubber band wrapped around an object.
In the image below, the red border represents the convex hull. Note that it does not reach into the indentation in the triangle.
After drawing a custom sprite using
clip can be used to make the sprite the shape of the drawing.
c = new Sprite pen red drawon c fd 100 rt 90 fd 100 turnto 0, 0 moveto 0, 0 home() pen null plan -> c.clip()
However, it does not clip concave areas. This is because they are within the convex hull.
c = new Sprite pen red drawon c fd 100 rt 90 fd 50 rt 45 fd 25 lt 90 fd 25 rt 45 fd 20 moveto 0, 0 home() pen null plan -> c.clip()↑