Doja平台上实现多个纹理

Doja平台上实现多个纹理

作者：飘飘白云

这个程序在imode平台上实现了原生模型上使用多个纹理的效果，这一次光照效果比较明显。程序中使用的图片image2.bmp来自j2medev网站。

源程序和资源下载：点击这里

import com.nttdocomo.ui.*;

import com.nttdocomo.opt.ui.j3d.*;

import javax.microedition.io.*;

//

/**

* @author ppby 2006-01-26

* Doja3D texture effect on primitive object

*/

public class DojaTexture extends IApplication {

private Canvas3D canv;

public void start() {

try {

canv = new Canvas3D();

Display.setCurrent(canv);

Thread thread = new Thread(canv);

thread.start();

} catch (IllegalThreadStateException itse) {

itse.printStackTrace();

} catch (Exception e) {

e.printStackTrace();

}

}

}

/**

* Canvas class

*/

class Canvas3D extends Canvas implements Runnable {

//quad vertexex array

private int[] quadV =

{

-120,-120, 120, 120, -120, 120, 120, 120, 120, -120, 120, 120, // front

120, -120, -120, -120, -120, -120,-120, 120, -120, 120, 120, -120, // back

-120, -120, -120, -120, -120, 120, -120, 120, 120, -120, 120, -120, // left

120, -120, 120, 120, -120, -120, 120, 120, -120, 120, 120, 120, // right

-120, 120, 120, 120, 120, 120, 120, 120, -120, -120, 120, -120, // top

120, -120, -120, -120, -120, -120,-120, -120, 120, 120, -120, 120, // bottom

};

//normals array for each vertex of quad

private int[] quadN =

{

0, 0, 4096, 0, 0, 4096, 0, 0, 4096, 0, 0, 4096,

0, 0, -4096, 0, 0, -4096, 0, 0, -4096, 0, 0, -4096,

-4096, 0, 0, -4096, 0, 0, -4096, 0, 0, -4096, 0, 0,

4096, 0, 0, 4096, 0, 0, 4096, 0, 0, 4096, 0, 0,

0, 4096, 0, 0, 4096, 0, 0, 4096, 0, 0, 4096, 0,

0, -4096, 0, 0, -4096, 0, 0, -4096, 0, 0, -4096, 0,

};

//texture array for each vertex of quad primitive

// One image containing two textures of 96x96, the whole image is 192x96

// the values given is the pixel values of the image.

private int[] quadT =

{

96, 96, 192, 96, 192, 0, 96, 0,

0, 96, 96, 96, 96, 0, 0, 0,

0, 96, 96, 96, 95, 0, 0, 0,

0, 96, 96, 96, 95, 0, 0, 0,

0, 96, 96, 96, 95, 0, 0, 0,

0, 96, 96, 96, 95, 0, 0, 0,

};

//color array for each vertex of quad primitive

private int[] quadC =

{

0xff << 16, //red

0xff << 8, //green

0xff << 4, //blue

0xff << 8 | 0xff << 16, //yellow

0xff << 16 | 0xff << 4,

0xff << 8 | 0xff << 4,

};

//quad primitive array

private PrimitiveArray quadPrim = null;

Graphics g = null;

// 3D affine transformation matrix

private AffineTrans viewT = new AffineTrans();

private AffineTrans affineT = new AffineTrans();

private AffineTrans rotateT = new AffineTrans();

private int rotX, rotY; // Variable for rotation

private int nAmLight = 2048 ;//ambient light intensity

private Texture quadTexture; // texture to use for the primitive figure.

public Canvas3D() {

g = this.getGraphics();

try {

// Set a camera:(eye position,look at position,up direction)

viewT.lookAt(

new Vector3D(0, 0, 800),

new Vector3D(0, 0, 200),

new Vector3D(0, 4096, 0)

);

//setup quad primitive data

setupPrim();

// load the texture to use for the primitive.

quadTexture = new Texture(Connector.openDataInputStream("resource:///image2.bmp"), false);

} catch (Exception e) {

System.out.println("Init data failed");

e.printStackTrace();

}

}

public void run() {

while (true) {

updateAffineTrans();

render();

try {

Thread.sleep(100); // wait 100ms

} catch (InterruptedException ie) {

System.out.println("Run error~~");

}

}

}

public void setupPrim()

{

quadPrim = new PrimitiveArray(

Graphics3D.PRIMITIVE_QUADS,

Graphics3D.NORMAL_PER_VERTEX

|Graphics3D.TEXTURE_COORD_PER_VERTEX

|Graphics3D.COLOR_NONE //no color for each face

|Graphics3D.ATTR_LIGHT, //enable light

6

);

//set quad primitive data

int[] primVer = quadPrim.getVertexArray();

int[] primTex = quadPrim.getTextureCoordArray();

int[] primNor = quadPrim.getNormalArray();

arrayCopy(primVer,quadV);

arrayCopy(primNor,quadN);

arrayCopy(primTex,quadT);

System.out.println("ver " + primVer.length + " tex " + primTex.length + " Nor " + primNor.length);

}

public void updateAffineTrans()

{

affineT.setIdentity();

//rotate y axis

rotateT.setIdentity();

rotateT.setRotateY(rotY);

affineT.mul(rotateT);

//rotate x axis

rotateT.setIdentity();

rotateT.setRotateX(rotX);

affineT.mul(rotateT,affineT);

}

public void arrayCopy(int[] dist,int[] src)

{

for(int i = 0;i < dist.length;i++)

{

dist[i] = src[i];

}

}

public void render()

{

try {

g.lock();

// Background Clear

g.setColor(Graphics.getColorOfRGB(0, 0, 0));

g.fillRect(0, 0, getWidth(), getHeight());

Graphics3D g3d = (Graphics3D) g;

g3d.setClipRect3D(0, 0, getWidth(),getHeight());

g3d.setScreenScale(4096/2, 4096/2);

g3d.setScreenCenter(getWidth()>>1, getHeight()>>1);

g3d.setPerspective(200, 10000, 4096*50/360);

//set light

g3d.setAmbientLight(nAmLight);

g3d.setDirectionLight(new Vector3D(1,1,0),4096/2);

g3d.enableLight(true);

//set viewport

affineT.mul(viewT,affineT);

g3d.setViewTrans(affineT); // Set view coordinate matrix

//set texture for quad primitive

g3d.setPrimitiveTextureArray(quadTexture);

g3d.setPrimitiveTexture(0);

//render quad

g3d.renderPrimitives(quadPrim, 0);

g3d.flush();

g.setColor(Graphics.getColorOfRGB(0, 255, 0xff));

g.drawString("Rotate:up,down,left,right key.", 5, 5+ Font.getDefaultFont().getHeight());

g.drawString("Light :KEY_7,KEY_9.", 5, 10+2*Font.getDefaultFont().getHeight());

g.unlock(true);

} catch (Exception e) {

System.out.println("Paint() err");

e.printStackTrace();

}

}

/**

* Key event process.

*/

public void processEvent(int type, int param) {

try {

if (type == Display.KEY_PRESSED_EVENT) {

switch (param) {

//rotate

case Display.KEY_UP:

rotX -= 128;

rotX %= 4096;

break;

case Display.KEY_DOWN:

rotX += 128;

rotX %= 4096;

break;

case Display.KEY_LEFT:

rotY -= 128;

rotY %= 4096;

break;

case Display.KEY_RIGHT:

rotY += 128;

rotY %= 4096;

break;

//light

case Display.KEY_7:

nAmLight -= 512;

nAmLight %= 4096;

nAmLight = (nAmLight<0? 1:nAmLight);

break;

case Display.KEY_9:

nAmLight += 512;

nAmLight = (nAmLight>=4096 ? 4095:nAmLight);

nAmLight %= 4096;

break;

}

}

} catch (Exception e) {

System.out.println("Set attribute value err");

e.printStackTrace();

}

}

public void paint(Graphics _g) {

}

}