Alternate Texture Canvas
taccgl™ supports a second, also called alternate, texture canvas
useful for various kinds of blending or transition animations.
The second canvas operates very similar to the first one: There is
a paint operation useful to paint elements on the second
canvas. Elements use the same coordinates on the main document as
on each of the texture canvases.
The texture on each face of an animated object is actually a
mixture resulting from a blend operation of the image on the first
and on the second texture canvas. Per default the blend completely
shows the image on the first canvas and does not show the image on
the second one. You can however freely mix the two images and
also animate this mixture. For each of the canvases there is
a opacity factor in the range 0.0...1.0. 0.0 means the image on the
canvas is completely transparent.
In addition you can also mix in a fix or animated color, which
also has an opacity value.
WebGL™ is a trademark of the Khronos Group Inc.