normalize-path-scale

Normalizes a 2D path to its bounding box, producing positions that are in the -1.0 ... 1.0 range with correct aspect ratio. For example; to render arbitrary SVG paths in 3D, centred in world units.

This does not produce a copy of the path, but instead mutates it in place.

var path = [ [x1, y1], [x2, y2], ... ]

//normalize path to -1.0 .. 1.0
normalize(path)

//render with webgl / canvas / etc
//...

Usage

normalize(path[, bounds])

Normalizes the 2D path in place, scaling the points to -1.0 .. 1.0 range. Maintains aspect ratio of the path.

You can specify bounds for a custom bounding box:

[ [minX, minY], [maxX, maxY] ]

Otherwise calculates the bounding box with bound-points.

Returns the specified path.

If the width or height of the bounding box is zero, this function returns early.

Changes

• 2.0 changes the array in place, uses bound-points, returns early on zero size
• 1.0 a simple version that does not mutate the input

License

MIT, see LICENSE.md for details.