////////////////////////////
// written by Mike Paixao //
// instructions can be    //
// found at:              //
// mike.simpletofind.ca   //
////////////////////////////

{
// this first section creates all the objects needed for the script //

$sel = `ls -sl`;
//$camera = `ls -sl`;
//pickWalk -d down;
//$camShape = `ls -sl`;

//if (`size $sel` == 0 )
//	error "nothing selected, grab your cam!";
//if ( `objectType -i "camera" $camShape[0]` == 0 )
//	error "select a camera"; 

$near = `spaceLocator -n "cameraLoc" -p 0 0 0`;
$char = `spaceLocator -n "characterLoc" -p 0 0 0`;
$far =  `spaceLocator -n "endLoc" -p 0 0 0`;

$shader = `shadingNode -asShader surfaceShader`;

$distanceTotal = `shadingNode -n "totalDistance" -asUtility distanceBetween`;
$distanceCharacter = `shadingNode -n "characterDistance" -asUtility distanceBetween`;

$characterPosition = `shadingNode -n "characterPosition" -asUtility multiplyDivide`;
setAttr ($characterPosition + ".operation") 2;

$distanceScale = `shadingNode -n "halfDist" -asUtility multiplyDivide`;
setAttr ($distanceScale + ".operation") 2;
setAttr ($distanceScale + ".input2X") 2;



// default way of creating a ramp shader with a projection node //

$rampProj = `shadingNode -asTexture projection`;
$ramp = `shadingNode -asTexture ramp`;
$threeDtexture = `shadingNode -asUtility place3dTexture`;
connectAttr ($threeDtexture+ ".wim[0]") ($rampProj+ ".pm");
connectAttr ($ramp + ".outColor") ($rampProj+ ".image");
$twoDtexture = `shadingNode -asUtility place2dTexture`;
connectAttr ($twoDtexture +".outUV") ($ramp + ".uv");
connectAttr ($twoDtexture+ ".outUvFilterSize") ($ramp + ".uvFilterSize");


addAttr -ln "fallof"  -at double  -dv .1 $char[0];
setAttr -e -keyable true ($char[0] + ".fallof");

setAttr ($twoDtexture +".wrapV") 0;
select -r ($threeDtexture+".scalePivot") ($threeDtexture+".rotatePivot") ;
move -yz -1 1;
select -r $threeDtexture;
rotate -r -os -90 0 0 ;
move -rpr 0 0 0 ;
parent $threeDtexture $near;
select -r $far;
move -r -os -wd 0 0 -2 ;
aimConstraint -mo -weight 1 -aimVector 1 0 0 -upVector 0 1 0 -worldUpType "vector" -worldUpVector 0 1 0 $far $near;


// connect the distance nodes to their corresponding locators //
// and ramp to the shader //

connectAttr -f ($rampProj + ".outColor")  ($shader + ".outColor");

connectAttr -f ($near[0] + ".worldMatrix") ($distanceTotal + ".inMatrix1");
connectAttr -f ($far[0] + ".worldMatrix") ($distanceTotal + ".inMatrix2");

connectAttr -f ($near[0] + ".worldMatrix") ($distanceCharacter + ".inMatrix1");
connectAttr -f ($char[0] + ".worldMatrix") ($distanceCharacter + ".inMatrix2");

//pointConstraint -offset 0 0 0 -weight 1 $camera $near;

connectAttr -force ($distanceTotal + ".distance") ($characterPosition + ".input2X");
connectAttr -force ($distanceCharacter + ".distance") ($characterPosition + ".input1X");
connectAttr -force ($distanceTotal + ".distance") ($distanceScale + ".input1X");
connectAttr -force ($distanceScale + ".outputX")($threeDtexture + ".scaleY");

// now modify the ramp section //

setAttr ($ramp + ".colorEntryList[0].color") -type double3 1 1 1;
setAttr ($ramp + ".colorEntryList[1].color") -type double3 0 0 0;
setAttr ($ramp + ".colorEntryList[2].color") -type double3 0 0 0 ;
setAttr ($ramp + ".colorEntryList[3].color") -type double3 0 0 0 ;
setAttr ($ramp + ".colorEntryList[4].color") -type double3 1 1 1 ;

setAttr ($ramp + ".colorEntryList[0].position") 0;
setAttr ($ramp + ".colorEntryList[1].position") 0.4;
setAttr ($ramp + ".colorEntryList[2].position") 0.5;
setAttr ($ramp + ".colorEntryList[3].position") 0.6;
setAttr ($ramp + ".colorEntryList[4].position") 1;


connectAttr -f ($characterPosition + ".outputX") ($ramp + ".colorEntryList[2].position");

//print ("$fallof = `getAttr characterLoc.fallof`;\r\n$pos = `getAttr \" "+ $ramp +".colorEntryList[3].position\"`;\r\n\r\n "+ $ramp +".colorEntryList[3].position = "+ $ramp +".colorEntryList[2].position + $fallof;\r\n\r\n"+ $ramp +".colorEntryList[1].position = "+ $ramp +".colorEntryList[2].position - $fallof;");

$expression = `expression -s ("$fallof = `getAttr characterLoc.fallof`;\r\n$pos = `getAttr \" "+ $ramp +".colorEntryList[3].position\"`;\r\n\r\n "+ $ramp +".colorEntryList[3].position = "+ $ramp +".colorEntryList[2].position + $fallof;\r\n\r\n"+ $ramp +".colorEntryList[1].position = "+ $ramp +".colorEntryList[2].position - $fallof;")  -o "" -n "DOFexpression" -ae 1 -uc all`;


}