Added o3djs.material.createCheckerMaterial.

It seems pretty useful for lots of samples.

Added o3djs.effect.createCheckerEffect 

to support that.

Also put pseudoRandom into math since so many
samples use it. Will consider switching samples
to use it.

Review URL: http://codereview.chromium.org/149509

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@20510 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 41 insertions, 0 deletions

diff --git a/o3d/samples/o3djs/material.js b/o3d/samples/o3djs/material.js
index db1449d..8ef180c 100644
--- a/o3d/samples/o3djs/material.js
+++ b/o3d/samples/o3djs/material.js
@@ -337,6 +337,47 @@ o3djs.material.createBasicMaterial = function(pack,
 };
 
 /**
+ * This function creates 2 color procedureal texture material.
+ *
+ * @see o3djs.material.createBasicMaterial
+ *
+ * @param {!o3d.Pack} pack Pack to manage created objects.
+ * @param {!o3djs.rendergraph.ViewInfo} viewInfo as returned from
+ *     o3djs.rendergraph.createBasicView.
+ * @param {!o3djs.math.Vector4} opt_color1 a color in the format [r, g, b, a]. 
+ *     Defaults to a medium blue-green.
+ * @param {!o3djs.math.Vector4} opt_color2 a color in the format [r, g, b, a].
+ *     Defaults to a light blue-green.
+ * @param {boolean} opt_transparent Whether or not the material is transparent.
+ *     Defaults to false.
+ * @param {number} opt_checkSize Defaults to 10 units.
+ * @return {!o3d.Material} The created material.
+ */
+o3djs.material.createCheckerMaterial = function(pack,
+                                                viewInfo,
+                                                opt_color1,
+                                                opt_color2,
+                                                opt_transparent,
+                                                opt_checkSize) {
+  opt_color1 = opt_color1 || [0.4, 0.5, 0.5, 1];
+  opt_color2 = opt_color2 || [0.4, 0.8, 0.8, 1];
+  opt_checkSize = opt_checkSize || 10;
+
+  var effect = o3djs.effect.createCheckerEffect(pack);
+  var material = pack.createObject('Material');
+  material.effect = effect;
+  material.drawList = opt_transparent ? viewInfo.zOrderedDrawList :
+                                        viewInfo.performanceDrawList;
+  o3djs.effect.createUniformParameters(pack, effect, material);
+
+  material.getParam('color1').value = opt_color1;
+  material.getParam('color2').value = opt_color2;
+  material.getParam('checkSize').value = opt_checkSize;
+
+  return material;
+};
+
+/**
  * Creates a material for an effect loaded from a file.
  * If the effect has already been loaded in the pack it will be reused.
  * @param {!o3d.Pack} pack Pack to create effect in.