MEL help

[misterbk]

You will probably need to create and use a File Texture node for that. You can probably set the U and V inputs and then read the color. If you know the resolution of your image file or can retrieve that information at runtime, you just divide the pixel coordinates by the image size to get the equivalent U and V coordinates between 0 and 1.

I don't think MEL has good structure for storing an image, but if you really want to have the image within arrays in MEL and not make retrieval calls on this file texture node, you could write a procedure:

Please note this is pseudocode and not supposed to be valid MEL.

nodeToDelete = create a file texture node
myArray = create a 3D array to store colors in X[0->XRez], Y[0->YRez], and Color[R,G,B,A]
// i.e. Green channel at pixel 5,12 retrieved with myArrray[5][12][1].
delete the 2DPlacement node if it gets in the way (Or maybe you need it?)
setAttr nodeToDelete's filename
for(all pixels in X from X=0 to X=XResolution) {
for(all pixels in Y from Y=0 to Y=YResolution) {
Ucoord = X / XResolution;
Vcoord = Y / YResolution;
setAttr on nodeToDelete (or its 2D Placement?) to set U and V
gotColor = getAttr on nodeToDelete's outColor
myArray[X][Y][0] = gotColor[0]
myArray[X][Y][1] = gotColor[1]
myArray[X][Y][2] = gotColor[2]
myArray[X][Y][3] = gotColor[3]
(Maybe this works as myArray[X][Y] = gotColor?)
}
}

[EJ]

Dude, take a look at the colorAtPoint command, it does exactly what you want.

[misterbk]

Lol, there I go again, scripting things that already exist!

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