OimoPhysics is a 3D physics engine. It supports rigid bodies and has some out of the box collision detectors such as sphere/box and box/shape. There are two built-in shapes ready to be used: box and sphere.
Sample
/* Copyright (c) 2012 EL-EMENT saharan
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this
* software and associated documentation * files (the "Software"), to deal in the Software
* without restriction, including without limitation the rights to use, copy, * modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to
* whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.element.oimo.physics.test {
import com.element.oimo.physics.collision.shape.BoxShape;
import com.element.oimo.physics.collision.shape.Shape;
import com.element.oimo.physics.collision.shape.ShapeConfig;
import com.element.oimo.physics.collision.shape.SphereShape;
import com.element.oimo.physics.dynamics.RigidBody;
import com.element.oimo.physics.dynamics.World;
import com.element.oimo.math.Mat33;
import com.element.oimo.math.Quat;
import com.element.oimo.math.Vec3;
import com.element.oimo.physics.OimoPhysics;
import com.element.oimo.physics.util.DebugDraw;
import flash.display.Sprite;
import flash.display.Stage3D;
import flash.events.Event;
import flash.events.KeyboardEvent;
import flash.text.TextField;
import flash.text.TextFormat;
import flash.ui.Keyboard;
import net.hires.debug.Stats;
/**
* 動作テスト
* @author saharan
*/
[SWF(width = "640", height = "480", frameRate = "60")]
public class BoxTest extends Sprite {
private var s3d:Stage3D;
private var world:World;
private var renderer:DebugDraw;
private var rigid:RigidBody;
private var count:uint;
private var tf:TextField;
private var fps:Number;
private var l:Boolean;
private var r:Boolean;
private var u:Boolean;
private var d:Boolean;
private var ctr:RigidBody;
public function BoxTest() {
if (stage) init();
else addEventListener(Event.ADDED_TO_STAGE, init);
}
private function init(e:Event = null):void {
removeEventListener(Event.ADDED_TO_STAGE, init);
var debug:Stats = new Stats();
debug.x = 570;
addChild(debug);
tf = new TextField();
tf.selectable = false;
tf.defaultTextFormat = new TextFormat("_monospace", 12, 0xffffff);
tf.x = 0;
tf.y = 0;
tf.width = 400;
tf.height = 400;
addChild(tf);
trace(OimoPhysics.DESCRIPTION);
initWorld();
fps = 0;
s3d = stage.stage3Ds[0];
s3d.addEventListener(Event.CONTEXT3D_CREATE, onContext3DCreated);
s3d.requestContext3D();
stage.addEventListener(KeyboardEvent.KEY_DOWN, function(e:KeyboardEvent):void {
var code:uint = e.keyCode;
if (code == Keyboard.W) {
u = true;
}
if (code == Keyboard.S) {
d = true;
}
if (code == Keyboard.A) {
l = true;
}
if (code == Keyboard.D) {
r = true;
}
if (code == Keyboard.SPACE) {
initWorld();
}
});
stage.addEventListener(KeyboardEvent.KEY_UP, function(e:KeyboardEvent):void {
var code:uint = e.keyCode;
if (code == Keyboard.W) {
u = false;
}
if (code == Keyboard.S) {
d = false;
}
if (code == Keyboard.A) {
l = false;
}
if (code == Keyboard.D) {
r = false;
}
});
addEventListener(Event.ENTER_FRAME, frame);
}
private function initWorld():void {
world = new World();
if (!renderer) renderer = new DebugDraw(640, 480);
renderer.setWorld(world);
var rb:RigidBody;
var s:Shape;
var c:ShapeConfig = new ShapeConfig();
c.restitution = 0;
rb = new RigidBody();
c.position.init(0, -0.5, 0);
c.rotation.init();
s = new BoxShape(32, 1, 32, c);
rb.addShape(s);
rb.setupMass(RigidBody.BODY_STATIC);
world.addRigidBody(rb);
c.rotation.init();
var width:uint = 6;
var height:uint = 6;
var depth:uint = 6;
var bw:Number = 0.7;
var bh:Number = 0.7;
var bd:Number = 0.7;
for (var i:int = 0; i < width; i++) {
for (var j:int = 0; j < height; j++) {
for (var k:int = 0; k < depth; k++) { rb = new RigidBody(); c.position.init( (i - (width - 1) * 0.5) * bw, j * (bh * 1.1) + bh * 0.5 + 0.05, (k - (depth - 1) * 0.5) * bd ); s = new BoxShape(bw, bh, bd, c); rb.addShape(s); rb.setupMass(RigidBody.BODY_DYNAMIC); world.addRigidBody(rb); } } } c.friction = 2; c.position.init(0, 1, 8); c.density = 10; c.rotation.init(); s = new SphereShape(1, c); ctr = new RigidBody(); ctr.addShape(s); ctr.setupMass(RigidBody.BODY_DYNAMIC); world.addRigidBody(ctr); } private function onContext3DCreated(e:Event = null):void { renderer.setContext3D(s3d.context3D); renderer.camera(0, 2, 4); } private function frame(e:Event = null):void { count++; var ang:Number = (320 - mouseX) * 0.01 + Math.PI * 0.5; renderer.camera( ctr.position.x + Math.cos(ang) * 8, ctr.position.y + (240 - mouseY) * 0.1, ctr.position.z + Math.sin(ang) * 8, ctr.position.x, ctr.position.y, ctr.position.z ); if (l) { ctr.linearVelocity.x -= Math.cos(ang - Math.PI * 0.5) * 0.8; ctr.linearVelocity.z -= Math.sin(ang - Math.PI * 0.5) * 0.8; } if (r) { ctr.linearVelocity.x -= Math.cos(ang + Math.PI * 0.5) * 0.8; ctr.linearVelocity.z -= Math.sin(ang + Math.PI * 0.5) * 0.8; } if (u) { ctr.linearVelocity.x -= Math.cos(ang) * 0.8; ctr.linearVelocity.z -= Math.sin(ang) * 0.8; } if (d) { ctr.linearVelocity.x += Math.cos(ang) * 0.8; ctr.linearVelocity.z += Math.sin(ang) * 0.8; } world.step(); fps += (1000 / world.performance.totalTime - fps) * 0.5; if (fps > 1000 || fps != fps) {
fps = 1000;
}
tf.text =
"Rigid Body Count: " + world.numRigidBodies + "\n" +
"Shape Count: " + world.numShapes + "\n" +
"Contacts Count: " + world.numContacts + "\n\n" +
"Broad Phase Time: " + world.performance.broadPhaseTime + "ms\n" +
"Narrow Phase Time: " + world.performance.narrowPhaseTime + "ms\n" +
"Constraints Time: " + world.performance.constraintsTime + "ms\n" +
"Update Time: " + world.performance.updateTime + "ms\n" +
"Total Time: " + world.performance.totalTime + "ms\n" +
"Physics FPS: " + fps.toFixed(2) + "\n"
;
renderer.render();
var len:uint = world.numRigidBodies;
var rbs:Vector. = world.rigidBodies;
for (var i:int = 0; i < len; i++) {
var r:RigidBody = rbs[i];
if (r.position.y < -12) {
r.position.init(Math.random() * 8 - 4, Math.random() * 4 + 8, Math.random() * 8 - 4);
r.linearVelocity.x *= 0.8;
r.linearVelocity.z *= 0.8;
}
}
}
}
}
