From 2ba5cf616754939f63192da0683fa9df966b9ee1 Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Sun, 1 Dec 2013 21:24:17 +0100
Subject: [PATCH] Use ol.vec.Mat4.makeTransform2D in
 ol.renderer.webgl.TileLayer

---
 src/ol/renderer/webgl/webgltilelayerrenderer.js | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/src/ol/renderer/webgl/webgltilelayerrenderer.js b/src/ol/renderer/webgl/webgltilelayerrenderer.js
index 64ba9be41e..5db387cbde 100644
--- a/src/ol/renderer/webgl/webgltilelayerrenderer.js
+++ b/src/ol/renderer/webgl/webgltilelayerrenderer.js
@@ -5,7 +5,6 @@ goog.provide('ol.renderer.webgl.TileLayer');
 
 goog.require('goog.array');
 goog.require('goog.object');
-goog.require('goog.vec.Mat4');
 goog.require('goog.vec.Vec4');
 goog.require('goog.webgl');
 goog.require('ol.Tile');
@@ -17,6 +16,7 @@ goog.require('ol.math');
 goog.require('ol.renderer.webgl.Layer');
 goog.require('ol.renderer.webgl.tilelayer.shader');
 goog.require('ol.structs.Buffer');
+goog.require('ol.vec.Mat4');
 
 
 
@@ -297,24 +297,16 @@ ol.renderer.webgl.TileLayer.prototype.prepareFrame =
   this.scheduleExpireCache(frameState, tileSource);
   this.updateLogos(frameState, tileSource);
 
-  var texCoordMatrix = this.texCoordMatrix;
-  goog.vec.Mat4.makeIdentity(texCoordMatrix);
-  goog.vec.Mat4.translate(texCoordMatrix,
+  ol.vec.Mat4.makeTransform2D(this.texCoordMatrix,
       (center[0] - framebufferExtent[0]) /
           (framebufferExtent[2] - framebufferExtent[0]),
       (center[1] - framebufferExtent[1]) /
           (framebufferExtent[3] - framebufferExtent[1]),
-      0);
-  goog.vec.Mat4.rotateZ(texCoordMatrix, view2DState.rotation);
-  goog.vec.Mat4.scale(texCoordMatrix,
       frameState.size[0] * view2DState.resolution /
           (framebufferExtent[2] - framebufferExtent[0]),
       frameState.size[1] * view2DState.resolution /
           (framebufferExtent[3] - framebufferExtent[1]),
-      1);
-  goog.vec.Mat4.translate(texCoordMatrix,
-      -0.5,
-      -0.5,
-      0);
+      view2DState.rotation,
+      -0.5, -0.5);
 
 };