Incorrect Scaling

[mbebenita]

Scaling movie clips in Flash doesn't seem to scale the resulting stroked path the same way canvas does. It scales the path then strokes it. It computes a width for the stroke based on the scale style and strokes evenly. The easiest way to try this out is to draw a circle with a thick stroke then scale the shape in the X or Y direction.

[magcius]

It depends on the flags that are set. In the Flash authoring environment, click on your movie clip and there should be a "Scaling" combo box in the Properties pane. These set the NoHScaleFlag / NoVScaleFlag of LineStyle2.

[mbebenita]

These flags seem to compute the width of the entire stroke depending on the H or V scaling. In all cases, the stroke width is uniform. Currently, in Shumway, it looks like we first stroke then scale the stroked path which makes it look all distorted.

[magcius]

Well, that's not entirely true.

See http://cairographics.org/tutorial/#L2linewidth.

NoHScale / NoVScale being on would produce the former, and them being off would produce the latter.