1 files changed, 54 insertions, 0 deletions

diff --git a/js/lib/geom/shape-primitive.js b/js/lib/geom/shape-primitive.js
new file mode 100644
index 00000000..bf0087b2
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+++ b/js/lib/geom/shape-primitive.js
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+/* <copyright>
+This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
+No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
+(c) Copyright 2011 Motorola Mobility, Inc.  All Rights Reserved.
+</copyright> */
+
+// Helper function for generating a RDGE primitive
+var ShapePrimitive = {};
+
+ShapePrimitive.create = function(coords,  normals,  uvs,  indices, primType, vertexCount) {
+        var renderer = g_Engine.getContext().renderer;
+
+        // to setup a primitive you must define it
+        // create a new primitive definition here to then fill out
+        var prim = new rdgePrimitiveDefinition();
+
+        // the vertex definition declares how the data will be delivered to the shader
+        // the position of an element in array determines which attribute in a shader the
+        // data is bound to
+        prim.vertexDefinition = {
+                // this shows two ways to map this data to an attribute
+                "vert":{'type':renderer.VS_ELEMENT_POS, 'bufferIndex':0, 'bufferUsage': renderer.BUFFER_STATIC},
+                "a_pos":{'type':renderer.VS_ELEMENT_POS, 'bufferIndex':0, 'bufferUsage': renderer.BUFFER_STATIC},
+
+                "normal":{'type':renderer.VS_ELEMENT_FLOAT3, 'bufferIndex':1, 'bufferUsage': renderer.BUFFER_STATIC},
+                "a_nrm":{'type':renderer.VS_ELEMENT_FLOAT3, 'bufferIndex':1, 'bufferUsage': renderer.BUFFER_STATIC},
+                "a_normal":{'type':renderer.VS_ELEMENT_FLOAT3, 'bufferIndex':1, 'bufferUsage': renderer.BUFFER_STATIC},
+
+                "texcoord":{'type':renderer.VS_ELEMENT_FLOAT2, 'bufferIndex':2, 'bufferUsage': renderer.BUFFER_STATIC},
+                "a_texcoord":{'type':renderer.VS_ELEMENT_FLOAT2, 'bufferIndex':2, 'bufferUsage': renderer.BUFFER_STATIC}
+        };
+
+        // the actual data that correlates to the vertex definition
+        prim.bufferStreams = [ coords, normals, uvs ];
+
+        // what type of buffers the data resides in, static is the most common case
+        prim.streamUsage = [ renderer.BUFFER_STATIC, renderer.BUFFER_STATIC, renderer.BUFFER_STATIC ];
+
+        // this tells the renderer to draw the primitive as a list of triangles
+        prim.type = primType;
+
+        prim.indexUsage = renderer.BUFFER_STREAM;
+        prim.indexBuffer = indices;
+
+        // finally the primitive is created, buffers are generated and the system determines
+        // the data it needs to draw this primitive according to the previous definition
+        renderer.createPrimitive(prim, vertexCount);
+
+        return prim;
+};
+
+if (typeof exports === "object") {
+    exports.ShapePrimitive = ShapePrimitive;
+}
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