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Unified Diff: samples/siteswap/siteswap.html

Issue 155005: Adding unfinished-but-working siteswap demo, copied from an ancient perforce changelist. (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/o3d/
Patch Set: Created 11 years, 6 months ago
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Index: samples/siteswap/siteswap.html
===================================================================
--- samples/siteswap/siteswap.html (revision 0)
+++ samples/siteswap/siteswap.html (revision 0)
@@ -0,0 +1,323 @@
+<!-- @@REWRITE(insert html-copyright) -->
+<!--
+O3D Siteswap animator
+@@REWRITE(delete-start)
+Author: Eric Uhrhane (ericu@google.com)
+@@REWRITE(delete-end)
+-->
+<!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>
+ Site Swap Simulator
+</title>
+<style type="text/css">
+ html, body {
+ height: 100%;
+ margin: 0;
+ padding: 0;
+ border: none;
+ }
+</style>
+<!-- Our javascript code -->
+<script type="text/javascript" src="../o3djs/base.js"></script>
+<script type="text/javascript" src="siteswap.js"></script>
+<script type="text/javascript" src="math.js"></script>
+<script type="text/javascript" src="animation.js"></script>
+<script type="text/javascript">
+
+o3djs.require('o3djs.util');
+
+// Set up the client area.
+function init() {
+ o3djs.util.setMainEngine(o3djs.util.Engine.V8);
+ o3djs.util.addScriptUri(''); // Allow V8 to load scripts in the cwd.
+ o3djs.util.makeClients(initStep2);
+ setUpSelection();
+}
+
+// Select the entire input pattern, so that the user can just type.
+function setUpSelection() {
+ var input_pattern = document.getElementById('input_pattern');
+ input_pattern.focus();
+ input_pattern.selectionStart = 0;
+ input_pattern.selectionEnd = input_pattern.value.length;
+}
+
+/*
+ * Wrappers to enable button presses to call through to the embedded V8 engine.
+ */
+
+// Update whether we're animating or frozen based on the value of the checkbox.
+function updateAnimatingWrapper() {
+ g.o3dElement.eval('updateAnimating()');
+}
+
+// Compute a new pattern.
+function onComputePatternWrapper() {
+ g.o3dElement.eval('onComputePattern()');
+}
+
+// Adjust the view matrix to the new proportions of the plugin window.
+// TODO: Switch to using the resize event once that's checked in.
+function onResizeWrapper() {
+ g.o3dElement.eval('onResize()');
+}
+window.onresize = onResizeWrapper;
+
+// Clean up all our callbacks, etc.
+function cleanupWrapper() {
+ if (g && g.o3dElement) {
+ g.o3dElement.eval('cleanup()');
+ }
+}
+
+// The point of this function is to suppress form submit; we want to use the
+// pattern entered when the user hits return, not submit the page to the
+// webserver.
+function suppressSubmit(event) {
+ onComputePatternWrapper(); // TODO: This suppresses form autocomplete storage.
+ return false;
+}
+
+</script>
+</head>
+<body onload="init()" onunload="cleanupWrapper()">
+<table width="100%" style="height:100%;">
+ <tr>
+ <td>
+ <h1>Juggler</h1>
+ This sample displays a site-swap juggling pattern with animation done by
+ a vertex shader.
+ <form name="the_form" onsubmit="return suppressSubmit(event)">
+ <table>
+ <tr>
+ <td>
+ <table>
+ <tr>
+ <td>
+ <input
+ type="radio"
+ name="radio_group_hands"
+ value="1"
+ onclick=onComputePatternWrapper()>
+ 1 Hand<br>
+ <input
+ type="radio"
+ name="radio_group_hands"
+ value="2"
+ onclick=onComputePatternWrapper()
+ checked>
+ 2 Hands<br>
+ <input
+ type="radio"
+ name="radio_group_hands"
+ value="3"
+ onclick=onComputePatternWrapper()>
+ 3 Hands<br>
+ <input
+ type="radio"
+ name="radio_group_hands"
+ value="4"
+ onclick=onComputePatternWrapper()>
+ 4 Hands<br>
+ </td>
+ <td>
+ <input type="text" name="input_pattern" id="input_pattern"
+ value="3 4 5">
+ </td>
+ <td>
+ <input type="checkbox" name="check_box" checked
+ onclick=updateAnimatingWrapper()>Animate
+ <input
+ type="checkbox"
+ name="pair_hands"
+ onclick=onComputePatternWrapper();
+ >Pair Hands
+ </td>
+ <td>
+ <input type="button" name="computePattern"
+ value="Compute Pattern"
+ onclick=onComputePatternWrapper()>
+ </td>
+ </tr>
+ </table>
+ </td>
+ <td>
+ </td>
+ </tr>
+ </table>
+ </form>
+ <table id="container" width="90%" style="height:70%;">
+ <tr>
+ <td height="100%">
+ <!-- Start of g.o3d plugin -->
+ <div id="o3d" style="width: 100%; height: 100%;"></div>
+ <!-- End of g.o3d plugin -->
+ </td>
+ </tr>
+ </table>
+ <!-- a simple way to get a multiline string -->
+ <textarea id="shader" name="shader" cols="80" rows="20"
+ style="display: none;">
+// the 4x4 world view projection matrix
+float4x4 worldViewProjection : WorldViewProjection;
+
+// positions of the light and camera
+float3 light_pos;
+float3 camera_pos;
+
+// phong lighting properties of the material
+float4 light_ambient;
+float4 light_diffuse;
+float4 light_specular;
+
+// shininess of the material (for specular lighting)
+float shininess;
+
+// time for animation
+float time;
+
+// coefficients for a t^2 + b t + c for each of x, y, z
+float3 coeff_a;
+float3 coeff_b;
+float3 coeff_c;
+
+// flag and coefficient for optional LERP with rate t * coeff_lerp;
+float coeff_lerp;
+
+// coefficients for a t^2 + b t + c for each of x, y, z, for optional LERP
+float3 coeff_l_a;
+float3 coeff_l_b;
+float3 coeff_l_c;
+
+// coefficients for d sin(f t) + e cos(e t) for each of x, y, z
+float3 coeff_d;
+float3 coeff_e;
+float3 coeff_f;
+
+// to be subtracted from time to get the t for the above equation
+float time_base;
+
+// input parameters for our vertex shader
+struct VertexShaderInput {
+ float4 position : POSITION;
+ float3 normal : NORMAL;
+ float4 color : COLOR;
+};
+
+// input parameters for our pixel shader
+// also the output parameters for our vertex shader
+struct PixelShaderInput {
+ float4 position : POSITION;
+ float3 lightVector : TEXCOORD0;
+ float3 normal : TEXCOORD1;
+ float3 viewPosition : TEXCOORD2;
+ float4 color : COLOR;
+};
+
+/**
+ * Vertex Shader - vertex shader for phong illumination
+ */
+PixelShaderInput vertexShaderFunction(VertexShaderInput input) {
+ /**
+ * We use the standard phong illumination equation here.
+ * We restrict (clamp) the dot products so that we
+ * don't get any negative values.
+ * All vectors are normalized for proper calculations.
+ *
+ * The output color is the summation of the
+ * ambient, diffuse, and specular contributions.
+ *
+ * Note that we have to transform each vertex and normal
+ * by the world view projection matrix first.
+ */
+ PixelShaderInput output;
+
+ float t = time - time_base;
+ float3 offset = float3(0, 0, 0);
+ offset += t * t * coeff_a + t * coeff_b + coeff_c;
+ offset += coeff_d * sin(t * coeff_f);
+ offset += coeff_e * cos(t * coeff_f);
+
+ float3 lerpOffset = t * t * coeff_l_a + t * coeff_l_b + coeff_l_c;
+ if (coeff_lerp > 0) {
+ float rate = min(coeff_lerp * t, 1);
+ float3 lerpVector = float3(rate, rate, rate);
+ offset = lerp(offset, lerpOffset, lerpVector);
+ } else if (coeff_lerp < 0) {
+ float rate = min(-coeff_lerp * t, 1);
+ float3 lerpVector = float3(rate, rate, rate);
+ offset = lerp(lerpOffset, offset, lerpVector);
+ }
+
+ input.position = input.position + float4(offset.xyz, 0);
+
+ output.position = mul(input.position, worldViewProjection);
+
+ /**
+ * lightVector - light vector
+ * normal - normal vector
+ * viewPosition - view vector (from camera)
+ */
+
+ // NOTE: In this case we do not need to multiply by any matrices since the
+ // WORLD transformation matrix is the identity. If you were moving the
+ // object such that the WORLD transform matrix was not the identity, you
+ // would need to multiply the normal by the WORLDINVERSETTRANSFORM matrix
+ // since the normal is in object space. Other values (light_pos, camera_pos)
+ // are already in world space.
+ float3 lightVector = light_pos - input.position.xyz;
+ float3 normal = input.normal;
+ float3 viewPosition = camera_pos - input.position.xyz;
+
+ output.lightVector = lightVector;
+ output.normal = normal;
+ output.viewPosition = viewPosition;
+ output.color = input.color;
+ return output;
+}
+
+/**
+ * Pixel Shader
+ */
+float4 pixelShaderFunction(PixelShaderInput input): COLOR {
+ float3 lightVector = normalize(input.lightVector);
+ float3 normal = normalize(input.normal);
+ float3 viewPosition = normalize(input.viewPosition);
+ float3 halfVector = normalize(lightVector + viewPosition);
+
+ // use lit function to calculate phong shading
+ // x component contains the ambient coefficient
+ // y component contains the diffuse coefficient:
+ // max(dot(normal, lightVector),0)
+ // z component contains the specular coefficient:
+ // dot(normal, lightVector) < 0 || dot(normal, halfVector) < 0 ?
+ // 0 : pow(dot(normal, halfVector), shininess)
+ // NOTE: This is actually Blinn-Phong shading, not Phong shading
+ // which would use the reflection vector instead of the half vector
+
+ float4 phong_coeff = lit(dot(normal, lightVector),
+ dot(normal, halfVector), shininess);
+
+ float4 ambient = light_ambient * phong_coeff.x * input.color;
+ float4 diffuse = light_diffuse * phong_coeff.y * input.color;
+ float4 specular = light_specular * phong_coeff.z * input.color;
+
+ return ambient + diffuse + specular;
+}
+
+// Here we tell our effect file *which* functions are
+// our vertex and pixel shaders.
+
+// #o3d VertexShaderEntryPoint vertexShaderFunction
+// #o3d PixelShaderEntryPoint pixelShaderFunction
+// #o3d MatrixLoadOrder RowMajor
+ </textarea>
+ </td>
+ </tr>
+</table>
+</body>
+</html>
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