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标题: java3D的材质设计 [打印本页]

作者: yeu1233 时间: 2012-9-18 11:38
标题: java3D的材质设计
import java.awt.*;

import javax.media.*;

import javax.media.j3d.*;

import javax.vecmath.*;

import com.sun.j3d.*;

import com.sun.j3d.utils.*;

import com.sun.j3d.utils.geometry.*;

import com.sun.j3d.utils.image.TextureLoader;

import com.sun.j3d.utils.universe.SimpleUniverse;

/*

* 创建物体外观对象:Appearance.

* 创建物体的材质对象Material,它通过5过属性指定物体如何显示,其中有4个属性是颜色:环境(Ambient)

* 放射(Emissive),漫射(Diffuse)和镜射(Specular),第5个属性是发光(Shininess),这些属性

* 的值均为数字类型.每个颜色属性指定了物体的在特有情况下如何发光,比如,环境色反射在环境中发射

* 方向无法确定的光线,漫射光反射来自一个方向的光线,所以当光线垂直摄入表面时会更亮.对大多数

* 物体可以确定给环境光和满射光成分制定同一颜色,给放射光指定黑色,

* 通过Appearance的setMaterial方法设置物体的材质

* 创建物体的纹理对象Texture.TextureLoader类根据图片生成纹理,调用他的getTexture方法获

* 取纹理对象Texture,需要设置Texture的边界模型和颜色

* 通过Appearance的setTexture方法设置物体的纹理*/

public class Grahoics3D {

static class PictureBall{

  public PictureBall(){

SimpleUniverse universe=new SimpleUniverse();

BranchGroup group=new BranchGroup();

//建立颜色

Color3f black=new Color3f(0.0f,0.0f,0.0f);

Color3f white=new Color3f(1.0f,1.0f,1.0f);

Color3f red=new Color3f(0.7f,0.7f,0.7f);

//建立纹理贴图

//必须是2的幂,例如128像素宽,256像素高

//当载入图片后可以指定想要如何使用图片,例如:RGB使用图片的颜色

//LUMINANCE使用图片显示黑白

TextureLoader loader=new TextureLoader("D:/javap/23.jpg","RGB",new Container());

Texture texture=loader.getTexture();//创建纹理对象

texture.setBoundaryModeS(Texture.WRAP);

texture.setBoundaryModeT(Texture.WRAP);

texture.setBoundaryColor(new Color4f(0.0f,1.0f,0.0f,0.0f));

//建立纹理属性

//可以用PEPLACE,BLEND或MODULATE

TextureAttributes textAttr=new TextureAttributes();

textAttr.setTextureMode(TextureAttributes.MODULATE);

Appearance ap=new Appearance();

ap.setTexture(texture);

ap.setTextureAttributes(textAttr);

//建立材质,5个参数分别为(环境,放射,漫射,镜射,发光)

ap.setMaterial(new Material(red,red,black,black,50.0f));

//创建一个球来展示纹理

//如果使用一个简单物理如球体,则需要通过设置"原始标记"允许纹理化

int primflags=Primitive.GENERATE_TEXTURE_COORDS;

Sphere sphere=new Sphere(0.5f,primflags,ap);

group.addChild(sphere);

//创建灯光,定向光源

Color3f light1Color=new Color3f(1f,1f,1f);

BoundingSphere bounds=new BoundingSphere(new Point3d(0.0,0.0,0.0),1000.0);

Vector3f light1Direction=new Vector3f(4.0f,-7.0f,-12.0f);

DirectionalLight light1=new DirectionalLight(light1Color,light1Direction);

light1.setInfluencingBounds(bounds);

group.addChild(light1);

//建立一个环境光源

AmbientLight ambientLight=new AmbientLight(new Color3f(0.5f,0.5f,0.5f));

group.addChild(ambientLight);

//注视球体

universe.getViewingPlatform().setNominalViewingTransform();

universe.addBranchGraph(group);

  }

}

public static void main(String args[]){

  PictureBall pictureBall=new PictureBall();

}

}

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