[JigLibFlash] Terrain Physics

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favorite:26
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license : MIT License
modified : 2010-12-12 10:37:11

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package {
    import flash.display.*;
    import flash.events.*;
    import flash.geom.*;
    import flash.utils.*;
    import jiglib.physics.*;
    import jiglib.plugin.papervision3d.*;
    import org.papervision3d.materials.*;
    import org.papervision3d.materials.special.*;
    import org.papervision3d.objects.primitives.*;
    import org.papervision3d.view.*;

[SWF(width="465",height="465",frameRate="60")]
    public class Main extends BasicView {
        
        public static const MAX_ITEMS:int = 10;
        public static const GROUND_SIZE:int = 1500;
        public static const GROUND_HEIGHT:int = 600;
        
        private var spehres:Vector.<RigidBody>;
        private var physics:Papervision3DPhysics;

public function Main(){
            // 初期設定
            stage.quality = StageQuality.LOW;
            opaqueBackground = 0x0;

// カメラの位置
            camera.y = 700;

// 3Dの物理エンジン
            physics = new Papervision3DPhysics(scene, 10);

// 地面を作成
            var groundMat:WireframeMaterial = new WireframeMaterial(0x999999);
            // パーリンノイズででこぼこ作成
            var bmd:BitmapData = new BitmapData(100, 100, false, 0x0);
            bmd.perlinNoise(40, 40, 1, 1, true, false, 7, true);
            // でこぼこ
            var ground:RigidBody = physics.createTerrain(bmd, groundMat, GROUND_SIZE, GROUND_SIZE, GROUND_HEIGHT, 15, 15);
            ground.friction = 0.1;
            ground.restitution = 0.8;
            ground.y = -GROUND_HEIGHT;

//　球体のテクスチャ
            var wireFrameMat:WireframeMaterial = new WireframeMaterial(0xFF0000);
            var colorMat:ColorMaterial = new ColorMaterial(0x0, 0.76);
            var compMat:CompositeMaterial = new CompositeMaterial();
            compMat.addMaterial(colorMat);
            compMat.addMaterial(wireFrameMat);

spehres = new Vector.<RigidBody>();
            for (var i:int = 0; i < 10; i++){
                var rigidBody:RigidBody = physics.createSphere(compMat, 100 * Math.random() + 20, 8, 6);
                rigidBody.restitution = 0.8;
                rigidBody.friction = 1;
                spehres[i] = rigidBody;
            }
            resetAll();

addEventListener(Event.ENTER_FRAME, enterFrameHandler);
            stage.addEventListener(MouseEvent.CLICK, 　resetAll);
            startRendering();
        }
        
        private function enterFrameHandler(e:Event = null):void {
            // 角度に応じてカメラの位置を設定
            var msec:Number = getTimer();
            camera.x = 1000 * Math.sin(msec / 2000);
            camera.z = 1000 * Math.cos(msec / 2000);
            camera.y = 500 * Math.sin(msec / 2500) + 900;

// 範囲からでた球体を初期位置に戻す
            resetBody();
            
            // 物理演算
            physics.engine.integrate(0.4);
        }
        
        private function resetBody():void {
            for (var i:int = 0; i < spehres.length; i++){
                var rigidBody:RigidBody = spehres[i];
                var pos:Vector3D = rigidBody.currentState.position;
                if (pos.x < -GROUND_SIZE/2 || pos.x > GROUND_SIZE/2 || pos.z < -GROUND_SIZE/2 || pos.z > GROUND_SIZE/2){
                    var force:Number = (Math.random() - 0.5) * 500;
                    rigidBody.moveTo(new Vector3D(0, 1000, 0));
                    rigidBody.addBodyForce(new Vector3D(force, 0, force), new Vector3D(force, 0, force));
                }
            }
        }
        
        private function resetAll(e:Event = null):void {
            for (var i:int = 0; i < spehres.length; i++){
                var rigidBody:RigidBody = spehres[i];
                var force:Number = (Math.random() - 0.5) * 500;
                rigidBody.moveTo(new Vector3D(0, 1000, 0));
                rigidBody.addBodyForce(new Vector3D(force, 0, force), new Vector3D(force, 0, force));
            }
        }
    }
}

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