1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
|
<!--
Copyright 2009, Google Inc.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-->
<!--
How to generate a texture.
-->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>
Generate Texture.
</title>
<script type="text/javascript" src="o3djs/base.js"></script>
<script type="text/javascript">
o3djs.require('o3djs.util');
o3djs.require('o3djs.math');
o3djs.require('o3djs.rendergraph');
o3djs.require('o3djs.primitives');
o3djs.require('o3djs.effect');
// global variables
var g_o3d;
var g_math;
var g_client;
var g_pack;
var g_viewInfo;
var g_finished = false; // for selenium testing
/**
* Creates the client area.
*/
function init() {
// Comment out the line below to run the sample in the browser
// JavaScript engine. This may be helpful for debugging.
o3djs.util.setMainEngine(o3djs.util.Engine.V8);
o3djs.util.makeClients(initStep2, 'FloatingPointTextures');
}
/**
* Initializes O3D, loads an effect, creates some textures
* and quads to display them.
* @param {Array} clientElements Array of o3d object elements.
*/
function initStep2(clientElements) {
// Initializes global variables and libraries.
var o3dElement = clientElements[0];
g_o3d = o3dElement.o3d;
g_math = o3djs.math;
// Set window.g_client as well. Otherwise when the sample runs in
// V8, selenium won't be able to find this variable (it can only see
// the browser environment).
window.g_client = g_client = o3dElement.client;
// Create a pack to manage our resources/assets
g_pack = g_client.createPack();
// Create the render graph for a view.
g_viewInfo = o3djs.rendergraph.createBasicView(
g_pack,
g_client.root,
g_client.renderGraphRoot);
var clientWidth = g_client.width;
var clientHeight = g_client.height;
g_viewInfo.drawContext.projection = g_math.matrix4.orthographic(
-clientWidth * 0.5,
clientWidth * 0.5,
-clientHeight * 0.5,
clientHeight * 0.5,
0.001,
1000);
g_viewInfo.drawContext.view = g_math.matrix4.lookAt(
[0, 500, 0], // eye
[0, 0, 0], // target
[0, 0, -1]); // up
// Create and load the effects.
var effectNames = [
'texture-only.shader',
'luminance_alpha_texture.shader'];
var effectInfos = {
texture_only: {name: 'texture-only.shader'},
one_channel_texture: {name: 'one-channel-texture.shader'}};
for (var key in effectInfos) {
var info = effectInfos[key];
var effect = g_pack.createObject('Effect');
o3djs.effect.loadEffect(effect, 'shaders/' + info.name);
// Create a Material for the effect.
var material = g_pack.createObject('Material');
// Set the material's drawList for transparent objects.
material.drawList = g_viewInfo.zOrderedDrawList;
// Apply the effect to this material.
material.effect = effect;
// Create the params that effect requires on the material.
effect.createUniformParameters(material);
// Create a quad.
var shape = o3djs.primitives.createPlane(g_pack,
material,
1,
1,
1,
1);
info.shape = shape;
}
// display our shape 5 times with 5 different textures
// by overriding the sampler on each instance.
for (var s = 0; s < 5; ++s) {
// create a transform for an instance
var transform = g_pack.createObject('Transform');
var x = s % 3;
var z = Math.floor(s / 3);
transform.translate((x - 1) * 140, 0, (z - 0.5) * 140);
transform.scale(128, 1, 128);
transform.parent = g_client.root;
// Create a ParamSampler on the transform with the same name as in
// the effect so this param will be used instead of the one on the material.
var samplerParam = transform.createParam('texSampler0', 'ParamSampler');
var sampler = g_pack.createObject('Sampler');
samplerParam.value = sampler;
sampler.addressModeU = g_o3d.Sampler.CLAMP;
sampler.addressModeV = g_o3d.Sampler.CLAMP;
// Create a texture.
{
var pixels = [];
var format;
switch (s) {
case 0: { // XRGB8
transform.addShape(effectInfos.texture_only.shape);
format = g_o3d.Texture.XRGB8;
for (var y = 0; y < 32; ++y) {
for (var x = 0; x < 32; ++x) {
var offset = (y * 32 + x) * 3; // rgb
var u = x / 32 * Math.PI * 0.5;
var v = y / 32 * Math.PI * 0.5;
pixels[offset + 0] = Math.cos(u); // red
pixels[offset + 1] = Math.sin(v); // green
pixels[offset + 2] = Math.sin(u); // blue
}
}
break;
}
case 1: { // ARGB8
transform.addShape(effectInfos.texture_only.shape);
format = g_o3d.Texture.ARGB8;
for (var y = 0; y < 32; ++y) {
for (var x = 0; x < 32; ++x) {
var offset = (y * 32 + x) * 4; // rgba
var u = x / 32 * Math.PI * 0.5;
var v = y / 32 * Math.PI * 0.5;
pixels[offset + 0] = Math.floor(y / 4) % 2; // red
pixels[offset + 1] = Math.sin(v); // green
pixels[offset + 2] = Math.floor(x / 4) % 2; // blue
pixels[offset + 3] = Math.abs(Math.sin(v * 4)); // alpha
}
}
break;
}
case 2: { // ABGR16F
transform.addShape(effectInfos.texture_only.shape);
format = g_o3d.Texture.ABGR16F;
for (var y = 0; y < 32; ++y) {
for (var x = 0; x < 32; ++x) {
var offset = (y * 32 + x) * 4; // rgba
var u = x / 32 * Math.PI * 0.5;
var v = y / 32 * Math.PI * 0.5;
pixels[offset + 0] = Math.cos(v); // red
pixels[offset + 1] = Math.sin(u); // green
pixels[offset + 2] = Math.sin(v); // blue
pixels[offset + 3] = Math.abs(Math.sin(u * 8)); // alpha
}
}
break;
}
case 3: { // ABGR32F
transform.addShape(effectInfos.texture_only.shape);
format = g_o3d.Texture.ABGR32F;
for (var y = 0; y < 32; ++y) {
for (var x = 0; x < 32; ++x) {
var offset = (y * 32 + x) * 4; // rgba
var u = x / 32 * Math.PI * 0.5;
var v = y / 32 * Math.PI * 0.5;
pixels[offset + 0] = Math.cos(v); // red
pixels[offset + 1] = Math.sin(u); // green
pixels[offset + 2] = Math.sin(v); // blue
pixels[offset + 3] = Math.abs(Math.sin(u * 8)); // alpha
}
}
break;
}
case 4: { // R32F
/**
* NOTE: GL and D3D do NOT share compatible 1 channel texture formats.
*
* In D3D the sampler will return
*
* R = channel 0
* G = const 1
* B = const 1
* A = const 1
*
* In GL the sampler will return
*
* R = channel 0
* G = channel 0
* B = channel 0
* A = channel 0
*
* What that means is only R works across platforms. G, B and A are
* undefined and if you use them you'll get the wrong results.
*/
transform.addShape(effectInfos.one_channel_texture.shape);
format = g_o3d.Texture.R32F;
for (var y = 0; y < 32; ++y) {
for (var x = 0; x < 32; ++x) {
var offset = (y * 32 + x); // r
var u = x / 32 * Math.PI * 0.5;
var v = y / 32 * Math.PI * 0.5;
pixels[offset + 0] = Math.cos(v * 16); // red
}
}
break;
}
}
var texture = g_pack.createTexture2D(32, 32, format, 1, false);
texture.set(0, pixels);
sampler.texture = texture;
}
}
window.g_finished = true; // for selenium testing.
}
</script>
</head>
<body onload="init()">
<h1>Generate Texture</h1>
Shows how to create textures in Javascript.
<br/>
<!-- Start of O3D plugin -->
<div id="o3d" style="width: 600px; height: 600px;"></div>
<!-- End of O3D plugin -->
</body>
</html>
|
