o3d-webgl: Adjusting Sampler to throw an error if client attempts to use BORD...

samples/o3d-webgl-samples/shadow-map.html

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@@ skipping 242 matching lines @@
   shadowEffect.loadPixelShaderFromString(shadowPixelShader);
 
   g_shadowMaterial.effect = shadowEffect;
   shadowEffect.createUniformParameters(g_shadowMaterial);
 
   g_shadowSampler = g_pack.createObject('Sampler');
   g_shadowSampler.texture = g_shadowTexture;
   g_shadowSampler.minFilter = g_o3d.Sampler.POINT;
   g_shadowSampler.magFilter = g_o3d.Sampler.POINT;
   g_shadowSampler.mipFilter = g_o3d.Sampler.POINT;
-  g_shadowSampler.addressModeU = g_o3d.Sampler.BORDER;
-  g_shadowSampler.addressModeV = g_o3d.Sampler.BORDER;
-  g_shadowSampler.borderColor = [1, 1, 1, 1];
+  // Note: The o3d-plugin used BORDER as address mode, but that is not available
+  // in WebGL so use WRAP instead.
+  g_shadowSampler.addressModeU = g_o3d.Sampler.WRAP;
+  g_shadowSampler.addressModeV = g_o3d.Sampler.WRAP;
+  //g_shadowSampler.borderColor = [1, 1, 1, 1];
 }
 
 
 /**
  * Sets up reasonable view and projection matrices.
  */
 function updateCamera() {
   // Set up a perspective transformation for the projection.
   g_colorViewInfo.drawContext.projection = g_math.matrix4.perspective(
       g_math.degToRad(30), // 30 degree frustum.
@@ skipping 346 matching lines @@
 <h1>Shadow Maps</h1>
 This sample implements a basic shadow map.
 <br/>
 <!-- Start of O3D plugin -->
 <div id="o3d" style="width: 800px; height: 600px;"></div>
 <!-- End of O3D plugin -->
 Use A, S, D, W, I and O to move the light.
 Press spacebar to see the shadow map.
 </body>
 </html>