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Note: The original shape is black.

Expanding two or three dimensional shapes can be performed, which maintains a specific delta distance from the shape. The corners can be filled with 'edge', 'round“, or 'chamfer' edges.

The opposite is also possible by specifying a negative (-) delta, a shape can be contracted.


  • delta : 1
  • corners : 'edge'
  • segments : 16
const myshape = expand({corners: 'round'}, shape1)
const myshape = expand({delta: -2}, shape2)
const myshape = expand({delta: 2}, shape3)

Note: Expanding three dimensional shapes is very CPU intensive. This is a known issue.