[whatwg] [WebApps] canvas transform()/setTransform()
taken.spc at gmail.com
Wed Dec 27 18:02:05 PST 2006
Web Application 1.0 adds the transform() and the setTransform() to the
canvas 2d context.
The conversion of the arguments of these methods to the matrices is
described in the section 18.104.22.168.2.
> The transform(m11, m12, m21, m22, dx, dy) method must multiply the current transformation matrix with the matrix described by:
> m11 m12 dx
> m21 m22 dy
> 0 0 1
> The setTransform(m11, m12, m21, m22, dx, dy) method...
However, this is repugnant. And it isn't compatible with many graphics
systems. So the matrix should be
m11 m21 dx
m12 m22 dy ... (b)
0 0 1
In addtion, the rhino-canvas implements both methods. It uses the matrix (b).
KUROSAWA, Takeshi - http://taken.s101.xrea.com/
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