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<html>
<head>
<title>Bullet/WebGL Demo</title>
<script src="CubicVR.js" type="text/javascript"></script>
<script type="text/javascript">var arguments = [];</script>
<script src="bullet_1_1_q1.ccsimple.js" type="text/javascript"></script>
<script src="bullet_glue.js" type="text/javascript"></script>
<style type="text/css">
body { background-color: #eee; }
</style>
<script type="text/javascript">
/**
Steps to create the demo:
* Run the bullet test in the test runner, using HelloWorld.cpp from this directory, get the generated .js file
* Preferably use optimizations, etc.
* Disable typed arrays, probably.
* Prevent the compiled bullet from running main(), we don't need it anymore. For example, put a |return;| at the beginning of callMain().
* Fix an inttoptr issue in compiled bullet, if built with QUANTUM == 1 (division by 16 should be 4)
* Go to the demos/webgl directory
* Run the demangler: python ../../third_party/demangler.py bullet_1_1_q1.js . > bullet.names
* Edit bullet_glue to use the right mangled names, with the output from the demangler
* Add some randomness to the initial cube positions by editing zz_prepare (search for 2.1 in the source)
* Optionally, run through closure compiler
*/
var NUM = 5;
var NUMRANGE = [1,2,3,4,5];
var boxes = [];
function simulatePhysics(dt) {
simulateBulletDemo(dt);
// Read bullet data into JS objects
var pos = [0,0,0];
var quat = new CubicVR.Quaternion;
for (var i = 0; i < NUM; i++) {
readBulletObject(i+1, pos, quat);
var renderObject = boxes[i];
renderObject.position[0] = pos[0];
renderObject.position[1] = pos[1];
renderObject.position[2] = pos[2];
renderObject.rotation = quat.toEuler();
}
}
var dts = 0, num = 0, lastHUD = Date.now();
function showFPS(dt) {
var now = Date.now();
dts += dt;
num++;
if (now - lastHUD > 333) {
document.getElementById('out2').innerHTML = '<b>FPS: ' + Math.ceil(1/(dts/num)) + '</b>';
lastHUD = now;
dts = 0;
num = 0;
}
t = now;
}
function startUp() {
var canvas = document.getElementById("canvas");
canvas.width = screen.width*0.70;
canvas.height = screen.height*0.55;
gl = CubicVR.GLCore.init(canvas, "CubicVR_Core.vs", "CubicVR_Core.fs");
if (!gl) {
alert("Sorry, no WebGL support :(");
return;
};
var scene = new CubicVR.Scene(canvas.width, canvas.height, 70);
var light = new CubicVR.Light({
type: CubicVR.enums.light.type.POINT,
method: CubicVR.enums.light.method.DYNAMIC,
diffuse: [1, 1, 1],
specular: [0.25, 0.25, 0.25],
position: [0, 5, 20],
distance: 200
});
scene.bindLight(light);
scene.camera.position = [0, 2.4, 17];
scene.camera.target = [0, 2.4, 0];
var boxMaterials = NUMRANGE.map(function(i) {
return new CubicVR.Material({
textures: {
color: new CubicVR.Texture("cube" + i + ".jpg")
}
});
});
var boxMeshes = boxMaterials.map(function(boxMaterial) {
return new CubicVR.primitives.box({
size: 2.0,
material: boxMaterial,
uvmapper: {
projectionMode: CubicVR.enums.uv.projection.CUBIC,
scale: [2, 2, 2]
}
}).triangulateQuads().compile().clean();
});
for (var i = 0; i < NUM; i++) {
boxes[i] = new CubicVR.SceneObject({ mesh: boxMeshes[i], position: [0, -10000, 0] });
scene.bindSceneObject(boxes[i], true);
}
var FLOOR_SIZE = 100;
var floorMaterial = new CubicVR.Material({
textures: {
color: new CubicVR.Texture("cube3.jpg")
}
});
var floorMesh = new CubicVR.primitives.box({
size: FLOOR_SIZE,
material: floorMaterial,
uvmapper: {
projectionMode: CubicVR.enums.uv.projection.CUBIC,
scale: [FLOOR_SIZE, FLOOR_SIZE, FLOOR_SIZE]
}
}).triangulateQuads().compile().clean();
var floor_ = new CubicVR.SceneObject({ mesh: floorMesh, position: [0, -FLOOR_SIZE/2-6, 0] });
scene.bindSceneObject(floor_, true);
var totalTime = 0;
var lastCenter = [0,0,0];
var timeCenterFixed = 0;
function noticeCenter(dt) {
totalTime += dt;
var currCenter = [0,0,0];
for (var i = 0; i < NUM; i++) {
currCenter = CubicVR.vec3.add(currCenter, boxes[i].position);
}
currCenter = CubicVR.vec3.multiply(currCenter, 1/NUM);
var diff = CubicVR.vec3.length(CubicVR.vec3.subtract(currCenter, lastCenter))/dt;
if (diff < 0.01) {
timeCenterFixed += dt;
if (timeCenterFixed >= 1.0 && totalTime > 5.0 &&
(currCenter[1] < -4.99 || totalTime > 11.0) ) restart();
} else {
timeCenterFixed = 0;
}
lastCenter = currCenter;
}
var mvc = new CubicVR.MouseViewController(canvas, scene.camera);
CubicVR.MainLoop(function(timer, gl) {
var dt = timer.getLastUpdateSeconds();
simulatePhysics(dt);
noticeCenter(dt);
scene.render();
showFPS(dt);
});
}
function restart() {
totalTime = 0;
restartBullet();
}
</script>
</head>
<body onload="startUp()">
<center>
<h2>Bullet/WebGL Demo</h2>
<!--form onsubmit="restart(); return false">
<input type="submit" value="restart">
</form-->
<canvas id="canvas" width="600" height="500"></canvas>
<br><br>
<div id="out2">waka</div>
<p>
This is the <b><a href="http://www.bulletphysics.com">Bullet physics engine</a></b>, compiled from C++ to JavaScript using <b><a href="http://emscripten.org">Emscripten</a></b>, with rendering by <b><a href="https://github.com/cjcliffe/CubicVR.js/">CubicVR.js</a></b> using WebGL.
</p><p>
<ul>
<li>Adjust the view by dragging the mouse over the canvas.</li>
<li>Note that the first drop of the cubes may be slow - give the JITs time to warm up.</li>
</ul>
</p>
</center>
</body>
</html>
|
