// forked from petit's Bringing Physics to Sandy 3D, using JigLibFlash package { import flash.events.Event; import jiglib.math.JNumber3D; import jiglib.plugin.sandy3d.Sandy3DPhysics; import jiglib.plugin.sandy3d.Sandy3DMesh; import sandy.view.BasicView; import sandy.materials.attributes.LightAttributes; import sandy.materials.attributes.LineAttributes; import sandy.materials.attributes.PhongAttributes; import sandy.materials.attributes.MaterialAttributes; import sandy.materials.attributes.GouraudAttributes; import sandy.materials.ColorMaterial; import sandy.materials.Appearance; import jiglib.physics.RigidBody; /** * The application shows balls rolling on slopes * Extending the BasicView sets up the Sandy scen for us :) * To get a nice bouncing, I mosty play with restitution. * No doubt this could be enhanced in quite a few ways * Go on and fork me :) * * @author petit@petitpub.com */ public class BallsOnSlopes extends BasicView { private var physics:Sandy3DPhysics; // The physic engine adapter class private var ground:RigidBody; private var balls:Array; // An array of chained objects private const NUM_BALLS:int = 3; /** * Set up the experiment */ public function BallsOnSlopes(){ super.init(600,400); balls = new Array(); scene.light.setDirection(1,-1,2); camera.z = -800; camera.y = 200; camera.lookAt(0, 200, 0); // Create an instance of the physics engine physics = new Sandy3DPhysics(scene, 3); createObjects(); render(); // reset on click stage.addEventListener ("click", click); } /** * Create the ground, ramps and balls */ private function createObjects():void { // Create some materials var groundAttributes:MaterialAttributes = new MaterialAttributes( new LineAttributes(0.5,0xECECEC,0.6), new LightAttributes(true)); var groundMaterial:ColorMaterial = new ColorMaterial(0x26A6D0, 1, groundAttributes); var backMaterial:ColorMaterial = new ColorMaterial(0xFF552A, 0.6); var slopeAttributes:MaterialAttributes = new MaterialAttributes( new LightAttributes(true)); var slopeMaterial:ColorMaterial = new ColorMaterial(0x1B9A1B, 0.8, slopeAttributes); slopeMaterial.lightingEnable = true; var ballAttributes:MaterialAttributes = new MaterialAttributes( new PhongAttributes(true,0.2,15,2 )); var ballMaterial:ColorMaterial = new ColorMaterial(0xFFAA2A, 1, ballAttributes); ballMaterial.lightingEnable = true; // Create the ground ground = physics.createGround("ground", new Appearance(groundMaterial), 800, 0, 10); physics.getMesh(ground).enableForcedDepth = true; physics.getMesh(ground).forcedDepth = 40040; ground.restitution = 0.6; // Create the back wall var backWall:RigidBody = physics.createCube("back", new Appearance( backMaterial ), 600, 2, 400, 2); physics.getMesh(backWall).forcedDepth = 40020; backWall.z = 200; backWall.y = 200; backWall.restitution = 1.6; backWall.movable = false; // Create the slopes var slope1:RigidBody = physics.createCube("slope1", new Appearance(slopeMaterial), 50, 200, 8, 2); physics.getMesh(slope1).useSingleContainer = false; slope1.x = -250; slope1.y = 300; slope1.z = 100; slope1.rotationX = -25; slope1.movable = false; var slope2:RigidBody = physics.createCube("slope2", new Appearance(slopeMaterial), 50, 300, 8, 2); physics.getMesh(slope2).useSingleContainer = false; slope2.x = -250; slope2.y = 200; slope2.z = -100; slope2.rotationX = 35; slope2.movable = false; // Create multiple balls for ( var i:int = 0; i < NUM_BALLS; i++) { balls[i]=physics.createSphere("ball" + 1, new Appearance(ballMaterial), 20, 8, 8); balls[i].x = -250; balls[i].y = 400 + 40 * i; balls[i].z = 160; //physics.getMesh(balls[i]).useSingleContainer = false; balls[i].restitution = 1.8; } } /** * Overrides the simpleRender method to call the time step method of the rendering engine. * @param event The ENTER_FRAME or timer event - the heart beat of Sandy */ override public function simpleRender( event:Event = null ):void { physics.step( ); super.simpleRender( event ); for ( var i:int = 0; i < NUM_BALLS; i++) { if (balls [i].z < camera.z) { balls[i].x = -250; balls[i].y = 400 + 40 * i; balls[i].z = 16; } } } public function click( event:Event = null ):void { for ( var i:int = 0; i < NUM_BALLS; i++) { balls[i].x = -250; balls[i].y = 400 + 40 * i; balls[i].z = 16; balls[i].setActive(); } } } }