Refactored OpenGL embedder that works on Android, Mac or Linux.

samples/android_sample/assets/dart/main.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import "dart:math" as Math;
-import "android_extension.dart";
+import "extension.dart";
 
+  //precision mediump float;

[vsm, 2013/01/14 21:31:40]

Delete the above.

[gram, 2013/01/16 01:49:16]

Done.

 const FRAGMENT_PROGRAM = """
-  precision mediump float;
 
   const vec3 lightDir = vec3(0.577350269, 0.577350269, -0.577350269);
   varying vec3 vPosition;
   uniform vec3 cameraPos;
   uniform vec3 sphere1Center;
   uniform vec3 sphere2Center;
   uniform vec3 sphere3Center;
 
   bool intersectSphere(vec3 center, vec3 lStart, vec3 lDir,
                        out float dist) {
@@ skipping 235 matching lines @@
 }
 
 pushVec(v, arr) {
   arr.addAll([v.x, v.y, v.z]);
 }
 
 var t = 0;
 int width, height;
 
 drawScene() {
+  log("In drawScene");
   var x1 = Math.sin(t * 1.1) * 1.5;
   var y1 = Math.cos(t * 1.3) * 1.5;
   var z1 = Math.sin(t + Math.PI/3) * 1.5;
   var x2 = Math.cos(t * 1.2) * 1.5;
   var y2 = Math.sin(t * 1.4) * 1.5;
   var z2 = Math.sin(t*1.25 - Math.PI/3) * 1.5;
   var x3 = Math.cos(t * 1.15) * 1.5;
   var y3 = Math.sin(t * 1.37) * 1.5;
   var z3 = Math.sin(t*1.27) * 1.5;
 
@@ skipping 35 matching lines @@
   gl.uniform3f(sphere1Center, x1, y1, z1);
   gl.uniform3f(sphere2Center, x2, y2, z2);
   gl.uniform3f(sphere3Center, x3, y3, z3);
 
   gl.drawArrays(WebGLRenderingContext.TRIANGLE_STRIP, 0, 4);
 
   t += 0.03;
   if (t > Math.PI * 200) {
     t -= Math.PI * 200;
   }
+  log("Done drawScene");
 }
 
 setup(int w, int h) {
   initShaders();
   gl.clearColor(0.0, 0.0, 0.0, 1.0);
   gl.clearDepth(1.0);
   initBuffers();
   resize(w, h);
-  playBackground("music/la_ere_gymnopedie.mp3");
+  //playBackground("music/la_ere_gymnopedie.mp3");

[vsm, 2013/01/14 21:31:40]

Either delete or add TODO to restore.  Nit: space after the "//".

[gram, 2013/01/16 01:49:16]

Done.

 }
 
 resize(int w, int h) {
+  log("in resize");
   width = w;
   height = h;
   ratio = width / height;
   gl.viewport(0, 0, width, height);
   t -= 0.03;
   drawScene();
+  log("done resize");
 }
 
 update() {
   drawScene();
-  eglSwapBuffers();
+  glSwapBuffers();
 }
 
 onMotionDown(num when, num x, num y) {
   t = (x / width) * Math.PI * 200;
 }
 
 onMotionUp(num when, num x, num y) {}
 onMotionMove(num when, num x, num y) {}
 onMotionCancel(num when, num x, num y) {}
 onMotionOutside(num when, num x, num y) {}
 onMotionPointerDown(num when, num x, num y) {}
 onMotionPointerUp(num when, num x, num y) {}
 onKeyDown(num when, int flags, int keycode, int metastate, int repeat) {}
 onKeyUp(num when, int flags, int keycode, int metastate, int repeat) {}
 onKeyMultiple(num when, int flags, int keycode, int metastate, int repeat) {
 }