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1/* <copyright>
2This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
3No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
4(c) Copyright 2011 Motorola Mobility, Inc. All Rights Reserved.
5</copyright> */
6
7renderUtils = {}
8
9/*
10 * Creates an indexed box primitive
11 * @return a rdge primitive
12 */
13renderUtils.createBox = function()
14{
15 var renderer = g_Engine.getContext().renderer;
16
17 var coords=
18 [ 1,1,1, -1,1,1, -1,-1,1, 1,-1,1, // front
19 1,1,1, 1,-1,1, 1,-1,-1, 1,1,-1, // right
20 1,1,1, 1,1,-1, -1,1,-1, -1,1,1, // top
21 -1,1,1, -1,1,-1, -1,-1,-1, -1,-1,1, // left
22 -1,-1,-1, 1,-1,-1, 1,-1,1, -1,-1,1, // bottom
23 1,-1,-1, -1,-1,-1, -1,1,-1, 1,1,-1]; // back
24
25 var normals=
26 [ 0,0,1, 0,0,1, 0,0,1, 0,0,1, // front
27 1,0,0, 1,0,0, 1,0,0, 1,0,0, // right
28 0,1,0, 0,1,0, 0,1,0, 0,1,0, // top
29 -1,0,0, -1,0,0, -1,0,0, -1,0,0, // left
30 0,-1,0, 0,-1,0, 0,-1,0, 0,-1,0, // bottom
31 0,0,-1, 0,0,-1, 0,0,-1, 0,0,-1]; // back
32
33
34
35 var uvs=
36 [ 1,1, 0,1, 0,0, 1,0, // front
37 0,1, 0,0, 1,0, 1,1, // right
38 1,0, 1,1, 0,1, 0,0, // top
39 1,1, 0,1, 0,0, 1,0, // left
40 0,0, 1,0, 1,1, 0,1, // bottom
41 0,0, 1,0, 1,1, 0,1]; // back
42
43 var indices=
44 [ 0,1,2,0,2,3, // front
45 4,5,6,4,6,7, // right
46 8,9,10,8,10,11, // top
47 12,13,14,12,14,15, // left
48 16,17,18,16,18,19, // bottom
49 20,21,22,20,22,23]; // back
50
51
52 var prim = new rdgePrimitiveDefinition();
53
54 prim.vertexDefinition=
55 {
56 "vert":{'type':rdgeConstants.VS_ELEMENT_POS, 'bufferIndex':0, 'bufferUsage': rdgeConstants.BUFFER_STATIC},
57 "a_pos":{'type':rdgeConstants.VS_ELEMENT_POS, 'bufferIndex':0, 'bufferUsage': rdgeConstants.BUFFER_STATIC},
58
59 "normal":{'type':rdgeConstants.VS_ELEMENT_FLOAT3, 'bufferIndex':1, 'bufferUsage': rdgeConstants.BUFFER_STATIC},
60 "a_nrm":{'type':rdgeConstants.VS_ELEMENT_FLOAT3, 'bufferIndex':1, 'bufferUsage': rdgeConstants.BUFFER_STATIC},
61
62 "texcoord":{'type':rdgeConstants.VS_ELEMENT_FLOAT2, 'bufferIndex':2, 'bufferUsage': rdgeConstants.BUFFER_STATIC},
63 "a_uv":{'type':rdgeConstants.VS_ELEMENT_FLOAT2, 'bufferIndex':2, 'bufferUsage': rdgeConstants.BUFFER_STATIC}
64 };
65
66 prim.bufferStreams=
67 [
68 coords,
69 normals,
70 uvs
71 ];
72
73 prim.streamUsage=
74 [
75 rdgeConstants.BUFFER_STATIC,
76 rdgeConstants.BUFFER_STATIC,
77 rdgeConstants.BUFFER_STATIC
78 ];
79
80 prim.indexUsage = rdgeConstants.BUFFER_STREAM;
81 prim.indexBuffer = indices;
82
83 prim.type = rdgeConstants.TRIANGLES;
84
85 renderer.createPrimitive(prim);
86
87 return prim;
88}
89
90//
91// makeSphere
92//
93// Create a sphere with the passed number of latitude and longitude bands and the passed radius.
94// Sphere has vertices, normals and texCoords. Create VBOs for each as well as the index array.
95// Return an object with the following properties:
96//
97// normalObject WebGLBuffer object for normals
98// texCoordObject WebGLBuffer object for texCoords
99// vertexObject WebGLBuffer object for vertices
100// indexObject WebGLBuffer object for indices
101// numIndices The number of indices in the indexObject
102//
103function makeSphere(ctx, radius, lats, longs)
104{
105 var geometryData = [ ];
106 var normalData = [ ];
107 var texCoordData = [ ];
108 var indexData = [ ];
109
110 for (var latNumber = 0; latNumber <= lats; ++latNumber) {
111 for (var longNumber = 0; longNumber <= longs; ++longNumber) {
112 var theta = latNumber * Math.PI / lats;
113 var phi = longNumber * 2 * Math.PI / longs;
114 var sinTheta = Math.sin(theta);
115 var sinPhi = Math.sin(phi);
116 var cosTheta = Math.cos(theta);
117 var cosPhi = Math.cos(phi);
118
119 var x = cosPhi * sinTheta;
120 var y = cosTheta;
121 var z = sinPhi * sinTheta;
122 var u = 1-(longNumber/longs);
123 var v = latNumber/lats;
124
125 normalData.push(x);
126 normalData.push(y);
127 normalData.push(z);
128 texCoordData.push(u);
129 texCoordData.push(v);
130 geometryData.push(radius * x);
131 geometryData.push(radius * y);
132 geometryData.push(radius * z);
133 }
134 }
135
136 for (var latNumber = 0; latNumber < lats; ++latNumber) {
137 for (var longNumber = 0; longNumber < longs; ++longNumber) {
138 var first = (latNumber * (longs+1)) + longNumber;
139 var second = first + longs + 1;
140 indexData.push(first);
141 indexData.push(second);
142 indexData.push(first+1);
143
144 indexData.push(second);
145 indexData.push(second+1);
146 indexData.push(first+1);
147 }
148 }
149
150 var retval = { };
151
152 retval.normalObject = ctx.createBuffer();
153 ctx.bindBuffer(ctx.ARRAY_BUFFER, retval.normalObject);
154 ctx.bufferData(ctx.ARRAY_BUFFER, new Float32Array(normalData), ctx.STATIC_DRAW);
155
156 retval.texCoordObject = ctx.createBuffer();
157 ctx.bindBuffer(ctx.ARRAY_BUFFER, retval.texCoordObject);
158 ctx.bufferData(ctx.ARRAY_BUFFER, new Float32Array(texCoordData), ctx.STATIC_DRAW);
159
160 retval.vertexObject = ctx.createBuffer();
161 ctx.bindBuffer(ctx.ARRAY_BUFFER, retval.vertexObject);
162 ctx.bufferData(ctx.ARRAY_BUFFER, new Float32Array(geometryData), ctx.STATIC_DRAW);
163
164 retval.numIndices = indexData.length;
165 retval.indexObject = ctx.createBuffer();
166 ctx.bindBuffer(ctx.ELEMENT_ARRAY_BUFFER, retval.indexObject);
167 ctx.bufferData(ctx.ELEMENT_ARRAY_BUFFER, new Uint16Array(indexData), ctx.STREAM_DRAW);
168
169 return retval;
170}
171
172/*
173 * Creates a plane as a grid of triangles/quads, orients the plane according the the plane normal
174 * note: the center of the plane is always assumed to be the origin.
175 */
176function createPlane( numCols, numRows, width, height, uTileCount, vTileCount, planeNormal )
177{
178 var renderer = g_Engine.getContext().renderer;
179
180 var pn = [0, 1, 0];
181 if(!planeNormal)
182 pn = planeNormal;
183
184 var coords = new Array( numCols*numRows*3 );
185 var normals = new Array( numCols*numRows*3 );
186 var uvs = new Array( numCols*numRows*2 );
187 var indices = new Array( numCols*numRows );
188
189 // setup the vertices's in a grid and on the plane
190 var coordIdx = 0;
191 var uvIdx = 0;
192
193 for(var row = 0; row < numRows; ++row)
194 {
195 for(var col = 0; col < numCols; ++col)
196 {
197 coords[coordIdx] = col*width - (numCols - 1)*width*0.5;
198 coords[coordIdx + 1] = 0;
199 coords[coordIdx + 2] = row*height - (numRows - 1)*height*0.5;
200
201 normals[coordIdx] = planeNormal[0];
202 normals[coordIdx + 1] = planeNormal[1];
203 normals[coordIdx + 2] = planeNormal[2];
204
205 uvs[uvIdx] = col/numCols * uTileCount;
206 uvs[uvIdx+1] = row/numRows * vTileCount;
207
208 coordIdx += 3;
209 uvIdx += 2;
210 }
211 }
212
213 // take the grid of vertices's and create triangles