freesewing/markdown/dev/reference/api/utils/stretchtoscale/en.md

title
utils.stretchToScale()

The utils.stretchToScale() function calculates the scale for a given amount of stretch.

Signature

float utils.stretchToScale(float stretch)

Notes

The way people measure stretch intuitively is different from the way we handle stretch in code.

When people say 25% stretch they mean that 10cm fabric gets stretched to 12.5cm fabric. In code and on our patterns, that means we need to scale things by 80%.

This function does that by returning:

1 / (1 + parseFloat(stretch))