// Put this file in Program Files\Adobe\Photoshop\Presets\Scripts\layersToSprite.js
    // Run in PhotoShop: File > Automate > Scripts: layersToSprite.js

    // Arrange layers into a sprite sheet.

	


    if (documents.length > 0)
    {
        var cols = 3;
		
		windowResource = "dialog {  \
		orientation: 'column', \
		alignChildren: ['fill', 'top'],  \
		preferredSize:[300, 130], \
		text: 'Set number of colums for spritesheet',  \
		margins:15, \
		sliderPanel: Panel { \
			orientation: 'row', \
			alignChildren: 'right', \
			margins:15, \
			text: ' Columns ', \
			st: StaticText { text: 'Value:' }, \
			sl: Slider { minvalue: 1, maxvalue: 32, value: 4, size:[220,20] }, \
			te: EditText { text: '4', characters: 2, justify: 'left'} \
			} \
		\
		bottomGroup: Group{ \
			cancelButton: Button { text: 'Cancel', properties:{name:'cancel'}, size: [120,24], alignment:['right', 'center'] }, \
			applyButton: Button { text: 'Apply', properties:{name:'ok'}, size: [120,24], alignment:['right', 'center'] }, \
		}\
		}"

		win = new Window(windowResource);
		
		win.sliderPanel.sl.onChange = function() {
			win.sliderPanel.te.text = Math.round(this.value);
		}

		win.bottomGroup.cancelButton.onClick = function() {
		  return win.close();
		};
		win.bottomGroup.applyButton.onClick = function() {
		  	cols = win.sliderPanel.sl.value;
		
			docRef = activeDocument;   
			var activeLayer = docRef.activeLayer;

			numLayers = docRef.artLayers.length;    
		   
			var rows = Math.ceil(numLayers/cols);
		   
			 var spriteX = docRef.width;
			 var spriteY = docRef.height;   
		   
			// put things in order
			app.preferences.rulerUnits = Units.PIXELS;
		   
			// resize the canvas
			 newX = spriteX * cols;
			 newY = spriteY * rows;
			
			 docRef.resizeCanvas( newX, newY, AnchorPosition.TOPLEFT );
				 
			// move the layers around
			 var rowi = 0;
			 var coli = 0;
			
			 for (i=(numLayers - 1); i >= 0; i--)
			 {    
				 docRef.artLayers[i].visible = 1;
				
				  var movX = spriteX*coli;
				  var movY = spriteY*rowi;
				 
				 docRef.artLayers[i].translate(movX, movY);
				
				 coli++;
				 if (coli > (cols - 1))
				 {
					 rowi++;
					 coli = 0;
				 }
			 }
			 
			 return win.close();
		};

		win.show();
		
       
        // --------------------------
        
    }