CODEWITHSUNDEEP
shapesbezier
Blender Dadaist
Blender Dadaist

Reputation: 157

Scale Bezier Curve

I need to adjust the length of a (cubic) Bezier curve to match that of another one, without disturbing its overall shape. This involves, I guess, proportionately scaling it recursively until the length is of the right magnitude (or is there any better approach?).

I have got the function that calculates the length. For scaling, I am stuck at calculating the coordinates of the new control points. There is this question that seems to have the answer but I am unable to figure out to what the variables a, b etc. refer in the answer. Also, I need to write a function from scratch, without having recourse to any API library (except python math).

Any help is appreciated.

Upvotes: 0

Views: 1345

Answers (1)

Dominik Mokriš
Dominik Mokriš

Reputation: 1169

Denoting the length of your curve by L and the desired length D, it seems to me that you just need to scale your curve (D/L)-times. Thanks to affine invariance, it should be enough to scale all your control points. That is, multiply each coordinate of each of your control points by D/L.

Or did I miss something?

Upvotes: 3

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