// EJL Uber Snap Tool v1.2
// By Eric Lyman 3-26-07
// If you like this script, drop a line at mezza550@gmail.com
// website: www.eric3d.com

// note: 12-11-08, make condition where if obj alredy has shader on faces, turns wires pink instead of using shader, else use shader.

global proc EJL_UberSnapTool()
{
 
    if (!`objExists "sucko"`) {
	toggleSelMode;
	toggleSelMode;
	selectMode -object;
	} 
	
	string $ejl[] = `ls -sl`;
   
	if (!`objExists "sucko"`) {
   // error checks...
   int $sizecheck = `size($ejl)`;
   if ($sizecheck != 1) { error "EJL Says: Only works with one object selected.\n"; }
   
   	string $selected_Shape_Node[] = `listRelatives -c $ejl[0]`;   
	if (`nodeType $selected_Shape_Node[0]` != "mesh") { error "EJL says: Sorry, only works on polygons.\n"; }
}			
   global string $pm;
   int $ejlsize = `size($ejl)`;
   global string $previousMaterial[];
      
   if ($ejlsize == 1 && !`objExists "sucko"`)					
   
   {
      // record previous material
      string $shape[] = `listRelatives -s $ejl[0]`;
      $previousMaterial = `listConnections -s 0 -d 1 ($shape[0] + ".instObjGroups[0]")`;
    
	  // duplication process
      //string $tmp[];
	  string $tmp[] = `duplicate $ejl[0]`;
      rename $tmp[0] sucko;
	  string $blah = "sucko";
      makeLive sucko;
      setAttr "sucko.visibility" 0;
	  
	 // remove from hiarchy (unparent)
		
		// find location in hiarchy
		string $nameParent = firstParentOf($blah);
			
		if ($nameParent == "") {
		// do nothing, as it was not grouped under anything
		}
		else {		
		select -r sucko;
		parent -a -w;
		}
      
      // create shader for object being manipulated
   
        if ( !`objExists "EJL_ubersnaptool_shader"`)
         {
            // make shader and assign
            string $shader = `shadingNode -asShader -n EJL_ubersnaptool_shader lambert` ;
            string $sg = `sets -renderable true -noSurfaceShader true -empty -name EJL_ubersnaptool_shaderSG`;
            connectAttr -f ($shader + ".outColor") ($sg + ".surfaceShader");
            setAttr ($shader + ".color") -type double3 0.721 0.716227 0.607803 ;
            // assign shader          
           sets -e -forceElement $sg $ejl[0];
			
			// turn edges pink
		/*	displayColor -active "lead" 20;
			displayColor -dormant "polyEdge" 20;
			select -r $ejl; */

         }
         else
         {
            // just assign shader
           select -r $ejl[0];
           sets -e -forceElement EJL_ubersnaptool_shaderSG;
			 
			/* displayColor -active "lead" 20;
			 displayColor -dormant "polyEdge" 20;
			 select -r $ejl; */

         }

	  // feedback
      print "EJL says: Uber Snap Tool is ON.\n";

       // make duplicate variable for else statement, for some reason it has to be this way to work?
      $pm = $ejl[0];

	     
   }
   
   else
   {
   	if (`objExists "sucko"`)
      		{
		// reassign old shader
				
				// turn edges back normal
		/*		displayColor -active "lead" 19;
				displayColor -dormant "polyEdge" 22; */
				//select -r $ejl;
				
				sets -e -forceElement $previousMaterial $ejl[0];
			

				
	//	sets -edit -forceElement $previousMaterial[0] $pm;
      		// kill live geo
      		makeLive -none;
      		delete sucko;

		// feedback
      		print "EJL says: Uber Snap Tool is OFF.\n";      
		}
	else
		{
		// error feedback
		error "EJL Says you must have at least one object selected!";
		}

   }  
   
   
}



// 	What does this script do?
// 
// The purpose for this tool is to provide modelers with an end all component snap tool.
// Maya can snap to the grid, to curves or points fairly easily, but to do all three requires a bit
// of time on the artists part. With this tool you can easily jump in and out of a 'snap to everything' mode.
// 
// 	How does it work?
//
// Quite simply this script will duplicate a selected polygon object, make the duplicate live, and then
// hide the live surface. Now you can freely move the components (verts, edges, faces) with the translate
// tool and not have to worry about losing volume on your model. This is ideal for re-doing topology.
//
//	 How to use this script:
// 
// Copy the MEL file to your scripts directory (for example, UserDirectory/maya/7.0/scripts/
// In the script editor or command line type the following:
// 
// source EJL_uberSnapTool.mel; EJL_uberSnapTool;
//
// This line can also be entered as a hotkey, put on to a marking menu, or a shelf button.
// The script works as a toggle, so it's highly recommended that you do this. 
//
//
//
// Known Bugs:
// - Only works well with polygon objects at the moment.
// - Does not work with any object that has facet level shader assignments.
// - Works on softmod handle, need to make it only work on geometry.
// - Does not work when starting in component mode
// 
// Suggestions
// - Make live geometry "nameofgeo_uber", placed inside group.Upon exit, delete group.
//