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diff --git a/o3d/samples/hellocube.html b/o3d/samples/hellocube.html new file mode 100644 index 0000000..4ad4eb4 --- /dev/null +++ b/o3d/samples/hellocube.html @@ -0,0 +1,312 @@ +<!-- +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. +--> + +<!-- +This sample shows how to place an O3D area in a page and draw simple +3D shape in 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> +Hello Cube: Getting started with O3D +</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'); + +// Events +// Run the init() function once the page has finished loading. +// Run the uninit() function when the page has is unloaded. +window.onload = init; +window.onunload = uninit; + +// global variables +var g_o3d; +var g_math; +var g_client; +var g_pack; +var g_clock = 0; +var g_timeMult = 1; +var g_cubeTransform; +var g_finished = false; // for selenium testing + +/** + * Creates an O3D shape representing a cube. The shape consists of + * a single primitive with eight vertices and 12 triangles (two for each face + * of the cube). + * @param {o3d.Material} material the material used by the primitive. + * @return {o3d.Shape} The Shape object created. + */ +function createCube(material) { + // Create a Shape object for the mesh. + var cubeShape = g_pack.createObject('Shape'); + + // Create the Primitive that will contain the geometry data for + // the cube. + var cubePrimitive = g_pack.createObject('Primitive'); + + // Create a StreamBank to hold the streams of vertex data. + var streamBank = g_pack.createObject('StreamBank'); + + // Assign the material that was passed in to the primitive. + cubePrimitive.material = material; + + // Assign the Primitive to the Shape. + cubePrimitive.owner = cubeShape; + + // Assign the StreamBank to the Primitive. + cubePrimitive.streamBank = streamBank; + + // The cube is made of 12 triangles. There's eight vertices in total which + // are shared between the face triangles. + cubePrimitive.primitiveType = g_o3d.Primitive.TRIANGLELIST; + cubePrimitive.numberPrimitives = 12; // 12 triangles + cubePrimitive.numberVertices = 8; // 8 vertices in total + + // Generate the draw element for the cube primitive. + cubePrimitive.createDrawElement(g_pack, null); + + // Create a javascript array that stores the X, Y and Z coordinates of each + // of the 8 corners of the cube. + var positionArray = [ + -0.5, -0.5, 0.5, // vertex 0 + 0.5, -0.5, 0.5, // vertex 1 + -0.5, 0.5, 0.5, // vertex 2 + 0.5, 0.5, 0.5, // vertex 3 + -0.5, 0.5, -0.5, // vertex 4 + 0.5, 0.5, -0.5, // vertex 5 + -0.5, -0.5, -0.5, // vertex 6 + 0.5, -0.5, -0.5 // vertex 7 + ]; + + // The following array defines how vertices are to be put together to form + // the triangles that make up the cube's faces. In the index array, every + // three elements define a triangle. So for example vertices 0, 1 and 2 + // make up the first triangle, vertices 2, 1 and 3 the second one, etc. + var indicesArray = [ + 0, 1, 2, // face 1 + 2, 1, 3, + 2, 3, 4, // face 2 + 4, 3, 5, + 4, 5, 6, // face 3 + 6, 5, 7, + 6, 7, 0, // face 4 + 0, 7, 1, + 1, 7, 3, // face 5 + 3, 7, 5, + 6, 0, 4, // face 6 + 4, 0, 2 + ]; + + // Create buffers containing the vertex data. + var positionsBuffer = g_pack.createObject('VertexBuffer'); + var positionsField = positionsBuffer.createField('FloatField', 3); + positionsBuffer.set(positionArray); + + var indexBuffer = g_pack.createObject('IndexBuffer'); + indexBuffer.set(indicesArray); + + // Associate the positions Buffer with the StreamBank. + streamBank.setVertexStream( + g_o3d.Stream.POSITION, // semantic: This stream stores vertex positions + 0, // semantic index: First (and only) position stream + positionsField, // field: the field this stream uses. + 0); // start_index: How many elements to skip in the + // field. + + // Associate the triangle indices Buffer with the primitive. + cubePrimitive.indexBuffer = indexBuffer; + + return cubeShape; +} + +/** + * This method gets called every time O3D renders a frame. Here's where + * we update the cube's transform to make it spin. + * @param {o3d.RenderEvent} renderEvent The render event object that gives + * us the elapsed time since the last time a frame was rendered. + */ +function renderCallback(renderEvent) { + g_clock += renderEvent.elapsedTime * g_timeMult; + // Rotate the cube around the Y axis. + g_cubeTransform.identity(); + g_cubeTransform.rotateY(2.0 * g_clock); +} + + +/** + * Creates the client area. + */ +function init() { + o3djs.util.makeClients(initStep2); +} + +/** + * Initializes O3D, creates the cube and sets up the transform and + * render graphs. + * @param {Array} clientElements Array of o3d object elements. + */ +function initStep2(clientElements) { + // Initializes global variables and libraries. + var o3dElement = clientElements[0]; + g_client = o3dElement.client; + g_o3d = o3dElement.o3d; + g_math = o3djs.math; + + // Create a pack to manage the objects created. + g_pack = g_client.createPack(); + + // Create the render graph for a view. + var viewInfo = o3djs.rendergraph.createBasicView( + g_pack, + g_client.root, + g_client.renderGraphRoot); + + // Set up a perspective projection. + viewInfo.drawContext.projection = g_math.matrix4.perspective( + g_math.degToRad(30), // 30 degree fov. + g_client.width / g_client.height, + 1, // Near plane. + 5000); // Far plane. + + // Set up our view transformation to look towards the world origin where the + // cube is located. + viewInfo.drawContext.view = g_math.matrix4.lookAt([0, 1, 5], // eye + [0, 0, 0], // target + [0, 1, 0]); // up + + // Create an Effect object and initialize it using the shaders from the + // text area. + var redEffect = g_pack.createObject('Effect'); + var shaderString = document.getElementById('effect').value; + redEffect.loadFromFXString(shaderString); + + // Create a Material for the mesh. + var redMaterial = g_pack.createObject('Material'); + + // Set the material's drawList. + redMaterial.drawList = viewInfo.performanceDrawList; + + // Apply our effect to this material. The effect tells the 3D hardware + // which shaders to use. + redMaterial.effect = redEffect; + + // Create the Shape for the cube mesh and assign its material. + var cubeShape = createCube(redMaterial); + + // Create a new transform and parent the Shape under it. + g_cubeTransform = g_pack.createObject('Transform'); + g_cubeTransform.addShape(cubeShape); + + // Parent the cube's transform to the client root. + g_cubeTransform.parent = g_client.root; + + // Set our render callback for animation. + // This sets a function to be executed every time a frame is rendered. + g_client.setRenderCallback(renderCallback); + + g_finished = true; // for selenium testing. +} + +/** + * Removes any callbacks so they don't get called after the page has unloaded. + */ +function uninit() { + if (g_client) { + g_client.cleanup(); + } +} + +</script> +</head> +<body> +<h1>Hello Cube</h1> +This example shows how to display a spinning red cube in O3D. +<br/> + + +<!-- Start of O3D plugin --> +<div id="o3d" style="width: 600px; height: 600px;"></div> +<!-- End of O3D plugin --> + +<!-- Don't render the textarea --> +<div style="display:none"> +<!-- Start of effect --> +<textarea id="effect"> + // World View Projection matrix that will transform the input vertices + // to screen space. + float4x4 worldViewProjection : WorldViewProjection; + + // input parameters for our vertex shader + struct VertexShaderInput { + float4 position : POSITION; + }; + + // input parameters for our pixel shader + struct PixelShaderInput { + float4 position : POSITION; + }; + + /** + * The vertex shader simply transforms the input vertices to screen space. + */ + PixelShaderInput vertexShaderFunction(VertexShaderInput input) { + PixelShaderInput output; + + // Multiply the vertex positions by the worldViewProjection matrix to + // transform them to screen space. + output.position = mul(input.position, worldViewProjection); + return output; + } + + /** + * This pixel shader just returns the color red. + */ + float4 pixelShaderFunction(PixelShaderInput input): COLOR { + return float4(1, 0, 0, 1); // Red. + } + + // Here we tell our effect file *which* functions are + // our vertex and pixel shaders. + + // #o3d VertexShaderEntryPoint vertexShaderFunction + // #o3d PixelShaderEntryPoint pixelShaderFunction + // #o3d MatrixLoadOrder RowMajor +</textarea> +<!-- End of effect --> +</div> +</body> +</html> |