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<!--
Google I/O O3D Sample.
This sample shows the steps to make a simple frame rate independent game.
-->
<!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>
Google I/O O3D Sample
</title>
<link rel="stylesheet" type="text/css" href="assets/style.css" />
<!-- Include sample javascript library functions-->
<script type="text/javascript" src="../o3djs/base.js"></script>
<!-- Our javascript code -->
<script type="text/javascript" id="o3dscript">
o3djs.require('o3djs.util');
o3djs.require('o3djs.math');
o3djs.require('o3djs.rendergraph');
o3djs.require('o3djs.primitives');
o3djs.require('o3djs.material');
// Events
// init() once the page has finished loading.
// unload() when the page is unloaded.
window.onload = init;
window.onunload= unload;
// global variables
var g_o3dElement;
var g_o3d;
var g_math;
var g_client;
var g_viewInfo;
var g_pack;
var g_root;
var g_globalParams;
var g_o3dWidth;
var g_o3dHeight;
var g_o3dElement;
var g_keyDown = []; // which keys are down by key code.
var g_playerTransform;
var g_playerXPosition = 0;
var g_playerZPosition = 0;
var g_eye = [15, 25, 50];
var g_target = [0, 10, 0];
var g_up = [0, 1, 0];
var g_viewMatrix;
/**
* Updates the projection matrix.
*/
function updateProjection() {
g_viewInfo.drawContext.projection = g_math.matrix4.perspective(
g_math.degToRad(45), // field of view.
g_o3dWidth / g_o3dHeight, // aspect ratio
0.1, // Near plane.
5000); // Far plane.
}
/*
* Updates the camera.
*/
function updateCamera() {
g_viewMatrix = g_math.matrix4.lookAt(g_eye, g_target, g_up);
g_viewInfo.drawContext.view = g_viewMatrix;
};
/**
* Updates global variables of the client's size if they have changed.
*/
function updateClientSize() {
var newWidth = g_client.width;
var newHeight = g_client.height;
if (g_o3dWidth != newWidth || g_o3dHeight != newHeight) {
g_o3dWidth = newWidth;
g_o3dHeight = newHeight;
updateProjection();
}
}
/**
* Creates the client area.
*/
function init() {
o3djs.util.makeClients(initStep2);
}
/**
* Initializes O3D and creates one shape.
* @param {Array} clientElements Array of o3d object elements.
*/
function initStep2(clientElements) {
// Initializes global variables and libraries.
g_o3dElement = clientElements[0];
g_o3d = g_o3dElement.o3d;
g_math = o3djs.math;
g_client = g_o3dElement.client;
// Creates a pack to manage our resources/assets
g_pack = g_client.createPack();
g_root = g_pack.createObject('Transform');
g_viewInfo = o3djs.rendergraph.createBasicView(
g_pack,
g_root,
g_client.renderGraphRoot);
updateCamera();
var redMaterial = o3djs.material.createBasicMaterial(
g_pack,
g_viewInfo,
[0.2, 1, 0.2, 1]); // green
var checkerMaterial = o3djs.material.createMaterialFromFile(
g_pack, 'shaders/checker.shader', g_viewInfo.performanceDrawList);
g_globalParams = o3djs.material.createAndBindStandardParams(g_pack);
g_globalParams.lightWorldPos.value = [30, 60, 40];
g_globalParams.lightColor.value = [1, 1, 1, 1];
// Create a ground plane.
var shape = o3djs.primitives.createPlane(
g_pack, checkerMaterial, 100, 100, 10, 10);
var transform = g_pack.createObject('Transform');
transform.parent = g_root;
transform.addShape(shape);
// Create a cylinder.
var shape = o3djs.primitives.createCylinder(
g_pack, redMaterial, 2.5, 5, 20, 1,
g_math.matrix4.translation([0, 2.5, 0]));
var transform = g_pack.createObject('Transform');
transform.parent = g_root;
transform.addShape(shape);
g_playerTransform = transform;
// Setup a render callback for per frame processing.
g_client.setRenderCallback(onRender);
o3djs.event.addEventListener(g_o3dElement, 'keydown', onKeyDown);
o3djs.event.addEventListener(g_o3dElement, 'keyup', onKeyUp);
window.g_finished = true; // for selenium testing.
}
/**
* Tracks key down events.
* @param {Event} e keyboard event.
*/
function onKeyDown(e) {
g_keyDown[e.keyCode] = true;
}
/**
* Tracks key up events.
* @param {Event} e keyboard event.
*/
function onKeyUp(e) {
g_keyDown[e.keyCode] = false;
}
/**
* Look at keys.
*/
function handleMoveKeys() {
var directionX = 0;
var directionZ = 0;
if (g_keyDown[37] || g_keyDown[65]) { directionX = -3; }
if (g_keyDown[39] || g_keyDown[68]) { directionX = 3; }
if (g_keyDown[38] || g_keyDown[87]) { directionZ = -3; }
if (g_keyDown[40] || g_keyDown[83]) { directionZ = 3; }
g_playerXPosition += directionX;
g_playerZPosition += directionZ;
g_playerTransform.identity();
g_playerTransform.translate(g_playerXPosition, 0, g_playerZPosition);
}
/**
* Called every frame.
* @param {!o3d.RenderEvent} renderEvent Rendering Information.
*/
function onRender(renderEvent) {
var elapsedTime = renderEvent.elapsedTime;
updateClientSize();
handleMoveKeys();
};
/**
* Remove any callbacks so they don't get called after the page has unloaded.
*/
function unload() {
if (g_client) {
g_client.cleanup();
}
}
</script>
</head>
<body>
<table style="width: 100%; height:100%;">
<tr style="height: 50px;"><td>
<div style="width: 100%; height: 50px; font-size: large;">
<img src="assets/colorbar.png" width="100%" height="10px"/><br/>
Google I/O 2009 O3D Sample
</div>
</td></tr>
<tr style="height: 100%;"><td>
<div style="width: 100%; height: 100%;">
<div id="o3d" style="width: 100%; height: 100%;"></div>
</div>
</td></tr>
</table>
</body>
</html>