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<!--
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<!--
Translate2 manipulator
This sample shows how to use the o3djs.manipulators.Translate2 class
to interactively drag objects around the scene.
-->
<!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>
Translate2 Manipulator
</title>
<script type="text/javascript" src="../o3djs/base.js"></script>
<script type="text/javascript" id="o3dscript">
o3djs.require('o3djs.util');
o3djs.require('o3djs.math');
o3djs.require('o3djs.quaternions');
o3djs.require('o3djs.rendergraph');
o3djs.require('o3djs.primitives');
o3djs.require('o3djs.manipulators');
o3djs.require('o3djs.effect');
o3djs.require('o3djs.cameracontroller');
// global variables
var g_o3dElement;
var g_client;
var g_o3d;
var g_math;
var g_mainPack;
var g_mainViewInfo;
var g_mainRoot;
var g_lightPosition = [5, 5, 7];
var g_lastCubeTransform;
var g_primitives = [];
var g_manager;
var g_cameraController;
/**
* Creates the client area.
*/
function initClient() {
window.g_finished = false; // for selenium testing.
// Runs the sample in V8. Comment out this line to run it in the browser
// JavaScript engine, for example if you want to debug it.
// TODO(kbr): we need to investigate why turning this on is
// significantly slower than leaving it disabled.
// o3djs.util.setMainEngine(o3djs.util.Engine.V8);
o3djs.util.makeClients(main);
}
/**
* Initializes global variables, positions camera, draws shapes.
* @param {Array} clientElements Array of o3d object elements.
*/
function main(clientElements) {
var o3dElement = clientElements[0];
// Init global variables.
initGlobals(clientElements);
// Add the shapes to the transform heirarchy.
createShapes();
// Add the manipulators to the transform hierarchy.
createManipulators();
// Set up the view and projection transformations.
initContext();
// Start picking; it won't do anything until the scene finishes loading.
o3djs.event.addEventListener(o3dElement, 'mousedown', onMouseDown);
o3djs.event.addEventListener(o3dElement, 'mousemove', onMouseMove);
o3djs.event.addEventListener(o3dElement, 'mouseup', onMouseUp);
window.g_finished = true; // for selenium testing.
}
function onMouseDown(e) {
if(e.button == 2) {
g_cameraController.mousedown(e);
} else {
g_manager.mousedown(e.x, e.y,
g_mainViewInfo.drawContext.view,
g_mainViewInfo.drawContext.projection,
g_client.width,
g_client.height);
}
}
function onMouseMove(e) {
g_cameraController.mousemove(e);
g_mainViewInfo.drawContext.view = g_cameraController.calculateViewMatrix();
g_manager.mousemove(e.x, e.y,
g_mainViewInfo.drawContext.view,
g_mainViewInfo.drawContext.projection,
g_client.width,
g_client.height);
g_manager.updateInactiveManipulators();
}
function onMouseUp(e) {
if(e.button == 2) {
g_cameraController.mouseup(e);
} else {
g_manager.mouseup();
g_manager.updateInactiveManipulators();
}
}
/**
* Initializes global variables and libraries.
*/
function initGlobals(clientElements) {
g_o3dElement = clientElements[0];
window.g_client = g_client = g_o3dElement.client;
g_o3d = g_o3dElement.o3d;
g_math = o3djs.math;
// Create a pack to manage the objects created.
g_mainPack = g_client.createPack();
// Make a root transform for our scene.
g_mainRoot = g_mainPack.createObject('Transform');
// Create the render graph for the scene view.
g_mainViewInfo = o3djs.rendergraph.createBasicView(
g_mainPack,
g_mainRoot,
g_client.renderGraphRoot);
}
/**
* Sets up reasonable view and projection matrices.
*/
function initContext() {
// Set up a perspective transformation for the projection.
g_mainViewInfo.drawContext.projection = g_math.matrix4.perspective(
g_math.degToRad(30), // 30 degree frustum.
g_o3dElement.clientWidth / g_o3dElement.clientHeight, // Aspect ratio.
1, // Near plane.
5000); // Far plane.
// Set up our view transformation using our CameraController.
g_cameraController = o3djs.cameracontroller.createCameraController(
[0, 2, 0], // centerPos
23, // backpedal
0, // heightAngle
0); // rotationAngle
g_mainViewInfo.drawContext.view = g_cameraController.calculateViewMatrix();
}
/**
* Creates shapes using the primitives utility library, and adds them to the
* transform graph at the root node.
*/
function createShapes() {
// Create a little tree-like hierarchy of cubes
createCubeTree(2, 1.5, [0, 0, 0], g_mainRoot);
g_lastCubeTransform.scale(3, 1, 1);
}
/**
* Creates a small tree of cubes to demonstrate interaction with a
* hierarchy of shapes.
*/
function createCubeTree(depth, edgeLength, translation, parent) {
var cur = createCube(edgeLength, translation, parent);
if (depth > 0) {
createCubeTree(depth - 1,
edgeLength / 1.5,
o3djs.math.addVector(translation,
[-1.2 * edgeLength,
1.0 * edgeLength,
0]),
cur);
createCubeTree(depth - 1,
edgeLength / 1.5,
o3djs.math.addVector(translation,
[1.2 * edgeLength,
1.0 * edgeLength,
0]),
cur);
}
return cur;
}
/**
* Creates a cube shape using the primitives utility library, with an
* optional translation and parent. Returns the newly-created
* transform for the cube.
*/
function createCube(edgeLength, opt_translation, opt_parent) {
var cube = o3djs.primitives.createCube(
g_mainPack,
// A green phong-shaded material.
o3djs.material.createBasicMaterial(g_mainPack,
g_mainViewInfo,
[0, 1, 0, 1]),
edgeLength);
var transform = g_mainPack.createObject('Transform');
g_lastCubeTransform = transform;
transform.addShape(cube);
if (opt_translation) {
transform.translate(opt_translation);
}
if (opt_parent) {
transform.parent = opt_parent;
} else {
transform.parent = g_mainRoot;
}
g_primitives.push(transform);
return transform;
}
/**
* Creates manipulators attached to the objects we've just created.
*/
function createManipulators() {
// Create a separate pack for the manipulators so they don't get mixed in
// with the main scene's objects.
var pack = g_client.createPack();
// Create a root transform for the manipulators so they are 100% separate
// from the scene's transforms.
var manipulatorRoot = pack.createObject('Transform');
g_manager = o3djs.manipulators.createManager(
pack,
manipulatorRoot,
g_client.renderGraphRoot,
g_mainViewInfo.root.priority + 1,
g_mainViewInfo.drawContext);
var jj = 2;
for (var ii = 0; ii < g_primitives.length; ii++) {
var manip = g_manager.createTranslate2();
manip.attachTo(g_primitives[ii]);
manip.setOffsetTranslation([0, -1.5, 0]);
// Demonstrate that we can drag along arbitrary directions.
if ((++jj % 4) == 0) {
manip.setOffsetRotation(o3djs.quaternions.rotationY(Math.PI / 4));
}
}
}
/**
* 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 onload="initClient()" onunload="unload()">
<h1>Translate2 Manipulator Sample</h1>
This example shows how to move objects around the scene using the
Translate2 manipulator.
<br/>
<!-- Start of O3D plugin -->
<div id="o3d" style="width: 600px; height: 600px;"></div>
<!-- End of O3D plugin -->
</body>
</html>
|
