sostler prod commit

1 files changed, 90 insertions, 0 deletions

diff --git a/static/tests/canvas1/jsplatformer5_files/RepeatingGameObject.js b/static/tests/canvas1/jsplatformer5_files/RepeatingGameObject.js
new file mode 100644
index 0000000..b145e97
--- /dev/null
+++ b/static/tests/canvas1/jsplatformer5_files/RepeatingGameObject.js
@@ -0,0 +1,90 @@
+/**
+    A class that display a repeating texture that can optionall be offset in either
+	the x or y axis
+    @author <a href="mailto:matthewcasperson@gmail.com">Matthew Casperson</a>
+    @class
+*/
+function RepeatingGameObject()
+{
+    /** The width that the final image will take up
+		@type Number
+	*/
+	this.width = 0;
+	/** The height that the final image will take up
+		@type Number
+	*/
+    this.height = 0;
+	/** How much of the scrollX and scrollY to apply when drawing
+		@type Number
+	*/
+    this.scrollFactor = 1;
+	
+    /**
+        Initialises this object
+        @return A reference to the initialised object
+    */
+    this.startupRepeatingGameObject = function(image, x, y, z, width, height, scrollFactor)
+    {
+        this.startupVisualGameObject(image, x, y, z);
+        this.width = width;
+        this.height = height;
+        this.scrollFactor = scrollFactor;
+        return this;
+    }
+	
+    /**
+        Clean this object up
+    */
+    this.shutdownstartupRepeatingGameObject = function()
+    {
+        this.shutdownVisualGameObject();
+    }
+    
+	/**
+        Draws this element to the back buffer
+        @param dt Time in seconds since the last frame
+		@param context The context to draw to
+		@param xScroll The global scrolling value of the x axis  
+		@param yScroll The global scrolling value of the y axis  
+    */
+    this.draw = function(dt, canvas, xScroll, yScroll)
+    {
+        var areaDrawn = [0, 0];
+        
+        for (var y = 0; y < this.height; y += areaDrawn[1])
+        {
+            for (var x = 0; x < this.width; x += areaDrawn[0])
+            {
+                // the top left corner to start drawing the next tile from
+				var newPosition = [this.x + x, this.y + y];
+				// the amount of space left in which to draw
+                var newFillArea = [this.width - x, this.height - y];
+				// the first time around you have to start drawing from the middle of the image
+				// subsequent tiles alwyas get drawn from the top or left
+                var newScrollPosition = [0, 0];
+                if (x==0) newScrollPosition[0] = xScroll * this.scrollFactor;
+                if (y==0) newScrollPosition[1] = yScroll * this.scrollFactor;
+                areaDrawn = this.drawRepeat(canvas, newPosition, newFillArea, newScrollPosition);
+            }
+        }
+    }
+    
+    this.drawRepeat = function(canvas, newPosition, newFillArea, newScrollPosition)
+    {
+        // find where in our repeating texture to start drawing (the top left corner)
+        var xOffset = Math.abs(newScrollPosition[0]) % this.image.width;
+        var yOffset = Math.abs(newScrollPosition[1]) % this.image.height;
+        var left = newScrollPosition[0]<0?this.image.width-xOffset:xOffset;
+        var top = newScrollPosition[1]<0?this.image.height-yOffset:yOffset;
+        var width = newFillArea[0] < this.image.width-left?newFillArea[0]:this.image.width-left;
+        var height = newFillArea[1] < this.image.height-top?newFillArea[1]:this.image.height-top;
+        
+        // draw the image
+        canvas.drawImage(this.image, left, top, width, height, newPosition[0], newPosition[1], width, height);
+        
+        return [width, height];
+    }
+    
+    
+}
+RepeatingGameObject.prototype = new VisualGameObject();