querying object material color

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  09 September 2005
Lightbulb querying object material color

Hi to all:-)

anyone knows how to read the RGB values of a lambert shader on a simple sphere??? I want to query them to be able to extract & control the red channel only..any ideas???
  09 September 2005
  	// create a Lambert + SG
  	string $lamb = `shadingNode -asShader lambert` ;
  	sets -renderable true -noSurfaceShader true -empty -name ($lamb + "SG");
  	connectAttr -f ($lamb + ".outColor") ($lamb + "SG.surfaceShader") ;
  	// assign it a greenish color
  	setAttr ($lamb + ".color") -type double3 .133 .55 .123 ;
  	// query the color
  	// note: when you setAttr on a color you set 3 floats
  	// so this needs to be a float-array!
  	float $col[] = `getAttr ($lamb + ".color")`  ;
  	// now see what we got:
  	print ("R: \<" + $col[0] + "\>\n") ;
  	print ("G: \<" + $col[1] + "\>\n") ;
  	print ("B: \<" + $col[2] + "\>\n") ;
  	// et voilá!
  	// hope it helps!
  09 September 2005
=== variable declarations =========================================
   string $inputNodes[],$selObj[];
   string $curObj,$shadingNode;
   float $redVal;
   vector $nodeColor;
   //==================================================  ============
   $redVal = 0.5;                                           //this will be yr red value,btwn 0 - 1
   $selObj = `ls -sl`;                                      //get current selection
   $selObj = `listRelatives -s $selObj[0]`;           //get shapeNode of current selection
   $selSG = `listConnections -t shadingEngine $selObj`;  //get name of shader engine
   $inputNodes = `listConnections -s 1 -d 0 $selSG`;      //get material name 
   $shadingNode = $inputNodes[0];
   $nodeColor = `getAttr ($shadingNode + ".color")`;      //get color of material name
   setAttr ($shadingNode + ".color") $redVal ($nodeColor.y) ($nodeColor.z);  //assign it
  09 September 2005
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