[OASIS Issue Tracker] Created: (OFFICE-3390) what is the axis of agradient?

what is the axis of a gradient?
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                 Key: OFFICE-3390
                 URL: http://tools.oasis-open.org/issues/browse/OFFICE-3390
             Project: OASIS Open Document Format for Office Applications (OpenDocument) TC
          Issue Type: Bug
          Components: Graphics
    Affects Versions: ODF 1.2 CD 05
            Reporter: Andreas Guelzow 
             Fix For: ODF 1.2 CD 06


A draw:gradient has among others the attributes draw:angle and draw:style. 

One possible value for draw:style is "linear", this is defined as: " a gradient where the colors blend along a linear vector perpendicular to the axis of the gradient."

If the colors blend along a vector perpendicular to the axis, then along the axis, the color should be constant, but the definition of draw:angle is:
"The draw:angle attribute specifies an angle that rotates the axis at which the gradient values are interpolated. " So apparently the colours are interpolated along the axis, not perpendicular to it.

This is a conflict.

Once again of course, we do not specify whether the angle is given in mathematically positive (ie. counter clockwise) sense and where the 0 degree axxis is.



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