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标题: Flash3D学习——Sandy学习笔记 [5] [打印本页]

作者: . 时间: 2012-8-23 11:12
标题: Flash3D学习——Sandy学习笔记 [5]

还有场景自适应的问题，需要说明一下。
摄像机的镜头可视角度使用 fov（vertical field of view angle）来定义。

换算公式：
var fl:Numer = (viewport.height / 2) / Math.tan (camera.fov / 2 * (Math.PI / 180));
代码：
package

{

import flash.display.Sprite;

import flash.events.*;

import flash.ui.*;

import flash.display.Bitmap;

import flash.display.BitmapData;

import flash.display.Loader;

import flash.net.URLRequest;

import flash.display.Stage;

import flash.display.StageAlign;

import flash.display.StageScaleMode;

import sandy.core.Scene3D;

import sandy.core.scenegraph.*;

import sandy.primitive.*;

import sandy.materials.*;

import sandy.materials.attributes.*;

import sandy.core.data.*;

/**

   * ...

   * @author ever5u

   */

public class fuxi extends Sprite

{

      private var scene:Scene3D;

      private var camera:Camera3D;

      public function fuxi() {

         stage.scaleMode = StageScaleMode.NO_SCALE;

         stage.align = StageAlign.TOP_LEFT;

         //创建一个摄像机

         camera = new Camera3D(300, 300);

         camera.x = 100;

         camera.y = 100;

         camera.z = -300;

         camera.lookAt(0,0,0);

         //创建一个 Group

         var root:Group = createScene();

         //创建场景

         scene = new Scene3D( "scene", this, camera, root );

         //创建实时侦听

         addEventListener( Event.ENTER_FRAME, enterFrameHandler );

         stage.addEventListener (Event.RESIZE, onResize);

      }

      var box = new Box("box", 100, 100, 100);

      var Plane

lane3D;

      public function createScene() {

         var g:Group = new Group();



         //在场景画一个坐标定位点

         Plane = new Plane3D("Texture", 300, 300);

         var myXLine

ine3D = new Line3D( "x-coord", new Point3D( -20, 0, 0), new Point3D( 20, 0, 0 ));

var myYLine

ine3D = new Line3D( "y-coord", new Point3D(0, -20, 0), new Point3D( 0, 20, 0 ));

var myZLine

ine3D = new Line3D( "z-coord", new Point3D(0, 0, -20), new Point3D( 0, 0, 20 ));



         g.addChild(myXLine);

         g.addChild(myYLine);

         g.addChild(myZLine);

         g.addChild( box );

         return g;

      }

      public function enterFrameHandler(_evt:Event) {

         box.rotateX = mouseX;

         box.rotateY = mouseY;

         scene.render();

      }

      function onResize (e:Event):void{

         // 获取场景宽高

         var w:Number = stage.stageWidth;

         var h:Number = stage.stageHeight;

         // 设置视野宽高

         scene.camera.viewport.width = w;

         scene.camera.viewport.height = h;

         // 获取物体box与摄像机间的距离

         var d:Number = box.getPosition ("camera").getNorm ();

         // 保持摄像机观看比例

         scene.camera.fov = 2 * Math.atan2 (h / 2, d) * (180 / Math.PI);

         // 执行渲染

         scene.render();

      }

}

}
效果：
http://www.blueidea.com/articleimg/2009/11/7221/Sandy_3.swf

作者: 铁锹 时间: 2012-8-23 11:16
谢谢分享。不错啊~继续加油

作者: 她。 时间: 2012-8-23 11:19
谢谢楼主的分享，但是图片不能显示呢

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