forked from danielrh/o3d-webgl-samples
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shader-test.html
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shader-test.html
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<!--
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.
-->
<!--
O3D Tutorial
In this tutorial, we load a scene file and then apply various shaders to it.
-->
<!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>
Shader Test
</title>
<style type="text/css">
html, body {
height: 100%;
margin: 0;
padding: 0;
border: none;
}
</style>
<!-- Include sample javascript library functions-->
<script type="text/javascript" src="../o3d-webgl/base.js"></script>
<script type="text/javascript" src="../o3djs/base.js"></script>
<!-- Our javascript code -->
<script type="text/javascript" id="o3dscript">
o3djs.base.o3d = o3d;
o3djs.require('o3djs.webgl');
o3djs.require('o3djs.util');
o3djs.require('o3djs.rendergraph');
o3djs.require('o3djs.pack');
o3djs.require('o3djs.math');
o3djs.require('o3djs.camera');
o3djs.require('o3djs.effect');
o3djs.require('o3djs.loader');
/**
* NOTE: O3D-WebGL is unable to load bump maps in .dds format. We omit the
* bump map examples here.
*/
// Events
// init() once the page has finished loading.
// unload() when the page is unloaded.
window.onload = init;
window.onunload = unload;
// global variables
var g_o3d;
var g_client;
var g_viewInfo;
var g_o3dElement;
var g_pack;
var g_root;
var g_math;
var g_timeMult = 1;
var g_finished = false; // for selenium testing
var g_currentTimeParam;
var g_clock = 0;
var g_shaderSelection = 0;
var g_rotateOn = true;
var g_o3dWidth; // width of our client area
var g_o3dHeight; // height of our client area
var g_shaders = [
{file: 'diffuse', name: 'Diffuse'},
{file: 'checker', name: 'Checker'},
{file: 'texture-only', name: 'Texture'},
{file: 'texture-colormult', name: 'Texture with Color Multiplier'},
{file: 'tangent', name: 'Tangent'},
{file: 'binormal', name: 'Binormal'},
{file: 'normal', name: 'Normal'},
{file: 'solid-color', name: 'Solid Color'},
{file: 'vertex-color', name: 'Vertex Color'},
{file: 'phong-with-colormult', name: 'Blinn-Phong with Color Multiplier'},
{file: 'toon', name: 'Toon'}
];
var g_effects = [];
var g_bumpTextureSampler;
var g_colorRampSampler;
// Our view and projection matrices
// The view matrix transforms objects from world space to view space.
var g_viewMatrix;
// The projection matrix projects objects from view space to the screen.
var g_projMatrix;
/**
* Returns the path of where the file is located
* with the trailing slash
*/
function getCurrentPath() {
var path = window.location.href;
var index = path.lastIndexOf('/');
return path.substring(0, index + 1);
}
/**
* Turn rotation on.
*/
function turnRotateOn() {
g_rotateOn = true;
}
/**
* Turn rotation off.
*/
function turnRotateOff() {
g_rotateOn = false;
}
/**
* This is the code to animate the rotation.
* @param {o3d.RenderEvent} render_event The render event.
*/
function onrender(render_event) {
var elapsedTime = render_event.elapsedTime * g_timeMult;
var newWidth = g_client.width;
var newHeight = g_client.height;
if (newWidth != g_o3dWidth || newHeight != g_o3dHeight) {
g_o3dWidth = newWidth;
g_o3dHeight = newHeight;
setupCamera(g_pack, g_root);
}
g_clock += elapsedTime * (g_rotateOn ? 1 : 0);
g_root.identity();
g_root.rotateY(g_clock);
g_currentTimeParam.value = g_clock;
}
/**
* Sets the camera based on the imported file.
* @param {!o3d.Pack} pack Pack to create context in.
* @param {!o3d.Transform} root Root of tree to search for camera info.
*/
function setupCamera(pack, root) {
// Get a CameraInfo (an object with a view and projection matrix)
// using our javascript library function
var cameraInfo = o3djs.camera.getViewAndProjectionFromCameras(root,
g_o3dWidth,
g_o3dHeight);
// Copy the view and projection to the draw context.
g_viewInfo.drawContext.view = cameraInfo.view;
g_viewInfo.drawContext.projection = cameraInfo.projection;
}
/**
* Our callback is called once the scene has been loaded into memory
* from the web or locally.
* @param {!o3d.Pack} pack Variable referring to the scene's pack.
* @param {!o3d.Transform} parent Transform parent.
* @param {*} exception null if loading succeeded.
*/
function sceneCallback(pack, parent, exception) {
if (exception) {
alert('Could not load scene\n' + exception);
return;
}
setupCamera(pack, parent);
// Start with diffuse as default
applyShader(pack, 0);
// Add some vertex colors because the teapot does not have any
// and yet the vertex color shader requires them.
var streamBanks = pack.getObjectsByClassName('o3d.StreamBank');
for (var ss = 0; ss < streamBanks.length; ++ss) {
var streamBank = streamBanks[ss];
if (!streamBank.getVertexStream(g_o3d.Stream.COLOR, 0)) {
var positionField = streamBank.getVertexStream(g_o3d.Stream.POSITION,
0).field;
var buffer = positionField.buffer;
var numElements = buffer.numElements;
var colorField = buffer.createField('FloatField', 4);
var colors = [];
for (var nn = 0; nn < numElements; ++nn) {
colors.push((nn * 40 / numElements) % 1,
(nn * 61 / numElements) % 1,
(nn * 83 / numElements) % 1,
1);
}
colorField.setAt(0, colors);
streamBank.setVertexStream(g_o3d.Stream.COLOR, 0, colorField, 0);
}
}
// Generate draw elements and setup material draw lists.
o3djs.pack.preparePack(pack, g_viewInfo);
}
/**
* Looks up a Param and if it exists sets its value.
* @param {!o3d.ParamObject} object object to look for param on.
* @param {string} name name of Param to look up.
* @param {*} value Value to set param.
*/
function setParam(object, paramName, value) {
var param = object.getParam(paramName);
if (param) {
param.value = value;
}
}
/**
* Apply the desired shader to our scene.
* @param {!o3d.Pack} pack Variable referring to the scene's pack.
* @param {number} shaderNumber Index into g_effects of which shader to use.
*/
function applyShader(pack, shaderNumber) {
var materials = pack.getObjectsByClassName('o3d.Material');
// Make the change to each material. For our teapot, there is only one
// material.
for (var m = 0; m < materials.length; m++) {
var material = materials[m];
g_effects[shaderNumber].createUniformParameters(material);
material.effect = g_effects[shaderNumber];
// Set our shader values
var colorParamValue = [0.8, 0.8, 0.8, 1];
var lightPosParamValue = [600, 600, 1000];
setParam(material, 'lightPos', lightPosParamValue);
setParam(material, 'lightWorldPos', lightPosParamValue);
setParam(material, 'cameraEye', [197.58, -63.5702, 0]);
setParam(material, 'color', colorParamValue);
setParam(material, 'colorMult', [.75, .75, 75., 1]);
setParam(material, 'useTexture', 0);
setParam(material, 'lightIntensity', [0.8, 0.8, 0.8, 1]);
setParam(material, 'ambientIntensity', [0.2, 0.2, 0.2, 1]);
setParam(material, 'emissive', [0, 0, 0, 1]);
setParam(material, 'ambient', [1, 1, 1, 1]);
setParam(material, 'diffuse', colorParamValue);
setParam(material, 'specular', [0.5, 0.5, 0.5, 1]);
setParam(material, 'shininess', 50);
setParam(material, 'AmbientSampler', g_bumpTextureSampler);
setParam(material, 'DiffuseSampler', g_bumpTextureSampler);
setParam(material, 'texSampler0', g_bumpTextureSampler);
setParam(material, 'colorRamp', g_colorRampSampler);
var timeParam = material.getParam('inputTime');
if (timeParam) {
timeParam.bind(g_currentTimeParam);
}
}
}
/**
* Creates our client area by looking for <div>s with an id that starts with
* "o3d".
*/
function init() {
o3djs.webgl.makeClients(initStep2);
}
/**
* Initializes O3D and loads the scene into the transform graph.
*/
function initStep2(clientElements) {
// Initialize global variables and libraries.
g_o3dElement = clientElements[0];
g_o3d = g_o3dElement.o3d;
g_math = o3djs.math;
g_client = g_o3dElement.client;
// Get the width and height of our client area. We will need this to create
// a projection matrix.
g_o3dWidth = g_client.width;
g_o3dHeight = g_client.height;
// Creates 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);
// Creates a transform to put our data on.
g_root = g_pack.createObject('Transform');
// Connects our root to the client's root.
g_root.parent = g_client.root;
var paramObject = g_pack.createObject('ParamObject');
g_currentTimeParam = paramObject.createParam('timeParam','ParamFloat');
// Load effects and fill out options.
options = '<select id="shaderSelect" name="shaderSelect"' +
' onChange="changeShader()">'
for(var s = 0; s < g_shaders.length; s++) {
g_effects[s] = g_pack.createObject('Effect');
var shaderString = '../shaders/' + g_shaders[s].file + '-glsl.shader';
o3djs.effect.loadEffect(g_effects[s], shaderString);
options += '<option value="' + s + '"' + (s == 0 ? ' selected' : '') +
'>' + g_shaders[s].name + '</option>';
}
options += '</select>';
document.getElementById('shaderDiv').innerHTML = options;
var loader = o3djs.loader.createLoader(initStep3);
var rampWidth = 64;
var texture = g_pack.createTexture2D(
rampWidth, 1, g_o3d.Texture.XRGB8, 1, false);
var pixels = [];
for (var ii = 0; ii < rampWidth; ++ii) {
var level = ii > rampWidth * 0.5 ? 1 : 0.3;
pixels.push(level, level, level);
}
texture.set(0, pixels);
g_colorRampSampler = g_pack.createObject('Sampler');
g_colorRampSampler.texture = texture;
g_colorRampSampler.addressModeU = g_o3d.Sampler.CLAMP;
loader.loadTexture(g_pack, '../assets/rock_texture.jpg',
function(texture, exception) {
if (exception) {
alert(exception);
} else {
g_bumpTextureSampler = g_pack.createObject('Sampler');
g_bumpTextureSampler.texture = texture;
g_bumpTextureSampler.mipFilter = g_o3d.Sampler.LINEAR;
}
});
var scenePath = getCurrentPath() + '../assets/teapot/scene.json';
loader.loadScene(g_client, g_pack, g_root, scenePath, sceneCallback);
loader.finish();
}
function initStep3() {
o3djs.event.addEventListener(g_o3dElement, 'mousedown', turnRotateOff);
o3djs.event.addEventListener(g_o3dElement, 'mouseup', turnRotateOn);
g_rotateOn = true;
// Tell our example to rotate.
g_client.setRenderCallback(onrender);
g_finished = true; // for selenium testing.
}
/**
* Swaps which shader we are using and applies it.
*/
function changeShader() {
var shaderNumber = document.getElementById("shaderSelect").value;
g_shaderSelection = parseFloat(shaderNumber);
applyShader(g_pack, g_shaderSelection);
}
/**
* Removes any callbacks so they don't get called after the page has unloaded.
*/
function unload() {
if (g_client) {
g_client.cleanup();
}
}
</script>
</head>
<body>
<h1 id="h">Shader Test</h1>
This example is useful for testing a shader or checking a scene. Clicking on the scene will temporarily stop rotation.
<br/>
<!-- Start of O3D plugin -->
<div id="o3d" style="width: 100%; height: 80%;"></div>
<!-- End of O3D plugin -->
<p>
<div id='shaderDiv'></div>
</body>
</html>