【Flash3D测试】4万个三角形作波浪运动 - 纳金网

{
import alternativa.engine3d.controllers.SimpleObjectController;
import alternativa.engine3d.core.VertexAttributes;
import alternativa.engine3d.lights.DirectionalLight;
import alternativa.engine3d.materials.FillMaterial;
import alternativa.engine3d.materials.Material;
import alternativa.engine3d.materials.TextureMaterial;
import alternativa.engine3d.materials.VertexLightTextureMaterial;
import alternativa.engine3d.objects.Mesh;
import alternativa.engine3d.resources.BitmapTextureResource;
import alternativa.engine3d.resources.Geometry;
import flash.display.Sprite;
import flash.events.Event;
import flash.sensors.Geolocation;
[SWF(frameRate="60")]
public class WaveTest extends AlternativaTemplate
{
[Embed(source="texture.jpg")]
static private const EmbedTexture:Class;
private var mesh:Mesh;
private var col:Number=150;
private var row:Number=150;
private var ds:Number=1000/col;
private var directionalLight:DirectionalLight;
private var directionalLight1:DirectionalLight;
private var material:VertexLightTextureMaterial;
private var vertices:Vector.;
private var indices:Vector.;
private var uvt:Vector.;
private var controller:SimpleObjectController;
private var t:Number=0;
public function WaveTest()
{
initLight();
//构建顶点属性
makeGeo();
camera.y=-300;
camera.z=550;
camera.x=ds*row*0.5;
camera.rotationX=deg2rad(-130);
rootContainer.addChild(mesh);
/* for(var i:int=0;i {
var a:Mesh=mesh.clone() as Mesh;
a.z+=2*(i+1);
rootContainer.addChild(a);
}
var b:Mesh=mesh.clone() as Mesh;
b.z+=200;
rootContainer.addChild(b);
*/ controller=new SimpleObjectController(stage,mesh,200);
}
//*/
override protected function onEnterFrame(e:Event):void
{
for(var i:int=0;i {
for(var j:int=0;j {
// vertices[(i*col+j)*3+2]=25*(Math.sin((i-j+t)/(col+row)*Math.PI*7));
vertices[(i*col+j)*3+2]=25*(Math.sin((i+0.5*j+t)/(col+row)*Math.PI*8)+0.21*Math.sin((i-j+t)/(col+row)*Math.PI*15));
}
}
t++;
// mesh.geometry.updateVertexBufferInContextFromVector(1,vertices,0,col*row);
var vertex:Vector.=new Vector.();
vertex.length=mesh.geometry.numVertices*8;
if (1){ //upload way 1
mesh.geometry.setAttributeValues(VertexAttributes.POSITION, vertices);
mesh.geometry.upload(stage3D.context3D);
} else { //upload way 2
for (j = 0; j < mesh.geometry.numVertices; j++){
vertex[uint(j * 8)] = vertices[uint(j * 3)];
vertex[uint(j * 8 + 1)] = vertices[uint(j * 3 + 1)];
vertex[uint(j * 8 + 2)] = vertices[uint(j * 3 + 2)];
vertex[uint(j * 8)+3]=uvt[j*2];
vertex[uint(j * 8)+4]=uvt[j*2+1];
}
mesh.geometry.updateVertexBufferInContextFromVector(0, vertex, 0, mesh.geometry.numVertices);
}
controller.update();
}
private function makeGeo():void
{
var attributes:Array = new Array();
attributes[0] = VertexAttributes.POSITION;
attributes[1] = VertexAttributes.POSITION;
attributes[2] = VertexAttributes.POSITION;
attributes[3] = VertexAttributes.TEXCOORDS[0];
attributes[4] = VertexAttributes.TEXCOORDS[0];
attributes[5] = VertexAttributes.NORMAL;
attributes[6] = VertexAttributes.NORMAL;
attributes[7] = VertexAttributes.NORMAL;
var geometry:Geometry = new Geometry();
geometry.addVertexStream(attributes);//添加顶点属性到几何体
geometry.numVertices = col*row;//顶点数量
preparePositionAndUV(geometry);
prepareIndices(geometry);
// geometry.setAttributeValues(VertexAttributes.NORMAL,Vector.(normal));
mesh = new Mesh();//创建一个网格
mesh.geometry = geometry;//网格几何体赋值
var texture:BitmapTextureResource = new BitmapTextureResource(new EmbedTexture().bitmapData);
var material:Material = new VertexLightTextureMaterial(texture);
var m:TextureMaterial=new TextureMaterial(texture);
// var m:FillMaterial = new FillMaterial(0xFF0000);//搞个材质填充
mesh.addSurface(m, 0,2*(col-1)*(row-1));//创建Surface
mesh.calculateBoundBox();//计算(必须)
}
private function prepareIndices(geometry:Geometry):void
{
indices=new Vector.();
for(var i:int=0;i {
for(var j:int=0;j {
indices.push(i*col+j,(i+1)*col+j,i*col+j+1,i*col+j+1,(i+1)*col+j,(i+1)*col+j+1);
}
}
geometry.indices =indices;
}
private function preparePositionAndUV(geometry:Geometry):void
{
vertices =new Vector.();
uvt=new Vector.();
for(var i:int=0;i {
for(var j:int =0;j {
vertices.push(i*ds,j*ds,0);
uvt.push(0.08*row*i/(row-1),0.08*col*(1-j/(col-1)));
}
}
geometry.setAttributeValues(VertexAttributes.POSITION,vertices);
//指定几何体由哪些顶点构成
geometry.setAttributeValues(VertexAttributes.TEXCOORDS[0], uvt);//为顶点分配uv贴图坐标
}
private function initLight():void
{
//主光源，大概在左上角
directionalLight = new DirectionalLight(0xffffff);
directionalLight.x = 0;
directionalLight.y = -100;
directionalLight.z = 50;
directionalLight.rotationX = -90*Math.PI/180;
// directionalLight.rotationZ = -70*Math.PI/180;
rootContainer.addChild(directionalLight);
//辅光源，大概在右下角，如果没有这个辅光的话，没有被主光源照到的
//的位置全黑，效果很不好
directionalLight1 = new DirectionalLight(0x4B4B4B);
directionalLight1.x = 500;
directionalLight1.y = -300;
directionalLight1.z = -200;
directionalLight1.rotationX = -45 * Math.PI / 180;
directionalLight1.rotationZ = 45 * Math.PI / 180;
rootContainer.addChild(directionalLight1);
}
}
}
下面是基类AlternativaTemplate：
package
{
import alternativa.engine3d.core.Camera3D;
import alternativa.engine3d.core.Object3D;
import alternativa.engine3d.core.Resource;
import alternativa.engine3d.core.View;
import alternativa.engine3d.materials.FillMaterial;
import alternativa.engine3d.objects.Sprite3D;
import alternativa.engine3d.primitives.Box;
import flash.display.Sprite;
import flash.display.Stage3D;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.events.Event;
public class AlternativaTemplate extends Sprite
{
protected var rootContainer:Object3D = new Object3D();
protected var camera:Camera3D;
protected var stage3D:Stage3D;
public function AlternativaTemplate()
{
stage.align = StageAlign.TOP_LEFT;
stage.scaleMode = StageScaleMode.NO_SCALE;
// CAMERA
camera = new Camera3D(0.1, 10000);
camera.view = new View(stage.stageWidth, stage.stageHeight);
addChild(camera.view);
addChild(camera.diagram);
rootContainer.addChild(camera);
//*/
// INIT Stage3D
stage3D = stage.stage3Ds[0];
stage3D.addEventListener(Event.CONTEXT3D_CREATE, onContextCreate);
stage3D.requestContext3D();
}
private function enterFrameHandler(event:Event):void
{
onEnterFrame(event);
camera.render(stage3D);
}
protected function onEnterFrame(e:Event):void
{
// 请在子类中覆盖；
}
protected function onContextCreate(event:Event):void
{
for each(var resource:Resource in rootContainer.getResources(***e)){
resource.upload(stage3D.context3D);
}
stage.addEventListener(Event.ENTER_FRAME, enterFrameHandler);
stage.addEventListener(Event.RESIZE,onResize);
}
//使视口适应窗口的变化。。。
private function onResize(event:Event):void
{
camera.view.width=stage.stageWidth;
camera.view.height=stage.stageHeight;
}
//两个实用的弧度和角度转换函数。。。
protected function rad2deg(radnum:Number):Number{
return radnum*180/Math.PI;
}
protected function deg2rad(degnum:Number):Number
{
return degnum*Math.PI/180;
}
}
}

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