import javax.microedition.lcdui.*;
import javax.microedition.m3g.*;
public class MyCanvas extends Canvas {
private Graphics3D graphics3d;
private Camera camera;
private Light light;
private float angle = 0.0f;
private Transform transform = new Transform();
private Background background = new Background();
private VertexBuffer vbuffer;
private IndexBuffer indexbuffer;
private Appearance appearance;
private Material material = new Material();
private Image image;
public MyCanvas() {
// 创建Displayable对象以探听命令事件
setCommandListener(new CommandListener() {
public void commandAction(Command c, Displayable d) {
if (c.getCommandType() == Command.EXIT) {
MIDletMain.quitApp();}}
});
try { init();}
catch(Exception e) { e.printStackTrace();}
}
/**
* 组件的初始化
*/
private void init() throws Exception {
addCommand(new Command("Exit", Command.EXIT, 1));
graphics3d = Graphics3D.getInstance();
camera = new Camera();
camera.setPerspective( 60.0f,(float)getWidth()/ (float)getHeight(), 1.0f, 1000.0f );
light = new Light();
light.setColor(0xffffff);
light.setIntensity(1.25f);
short[] vert = {
5, 5, 5, -5, 5, 5, 5,-5, 5, -5,-5, 5,
-5, 5,-5, 5, 5,-5, -5,-5,-5, 5,-5,-5,
-5, 5, 5, -5, 5,-5, -5,-5, 5, -5,-5,-5,
5, 5,-5, 5, 5, 5, 5,-5,-5, 5,-5, 5,
5, 5,-5, -5, 5,-5, 5, 5, 5, -5, 5, 5,
5,-5, 5, -5,-5, 5, 5,-5,-5, -5,-5,-5 };
VertexArray vertArray = new VertexArray(vert.length / 3, 3, 2);
vertArray.set(0, vert.length/3, vert);
//立方体的各个结点法线
byte[] norm = {
0, 0, 127, 0, 0, 127, 0, 0, 127, 0, 0, 127,
0, 0,-127, 0, 0,-127, 0, 0,-127, 0, 0,-127,
-127, 0, 0, -127, 0, 0, -127, 0, 0, -127, 0, 0,
127, 0, 0, 127, 0, 0, 127, 0, 0, 127, 0, 0,
0, 127, 0, 0, 127, 0, 0, 127, 0, 0, 127, 0,
0,-127, 0, 0,-127, 0, 0,-127, 0, 0,-127, 0 };
VertexArray normArray = new VertexArray(norm.length / 3, 3, 1);
normArray.set(0, norm.length/3, norm);
//各个结点的纹理坐标
short[] tex = {
1, 0, 0, 0, 1, 1, 0, 1,
1, 0, 0, 0, 1, 1, 0, 1,
1, 0, 0, 0, 1, 1, 0, 1,
1, 0, 0, 0, 1, 1, 0, 1,
1, 0, 0, 0, 1, 1, 0, 1,
1, 0, 0, 0, 1, 1, 0, 1 };
VertexArray texArray = new VertexArray(tex.length / 2, 2, 2);
texArray.set(0, tex.length/2, tex);
int[] stripLen = { 4, 4, 4, 4, 4, 4 };
// 对象的VertexBuffer
VertexBuffer vb = vbuffer = new VertexBuffer();
vb.setPositions(vertArray, 1.0f, null);
vb.setNormals(normArray);
vb.setTexCoords(0, texArray, 1.0f, null);
indexbuffer = new TriangleStripArray( 0, stripLen );
//纹理图像
image = Image.createImage( "/pic1.png" );
Image2D image2D = new Image2D( Image2D.RGB, image );
Texture2D texture = new Texture2D( image2D );
texture.setFiltering(Texture2D.FILTER_NEAREST,
Texture2D.FILTER_NEAREST);
texture.setWrapping(Texture2D.WRAP_CLAMP,Texture2D.WRAP_CLAMP);
texture.setBlending(Texture2D.FUNC_MODULATE);
// 创建外观（Appearance）对象
appearance = new Appearance();
appearance.setTexture(0, texture);
appearance.setMaterial(material);
material.setColor(Material.DIFFUSE, 0xFFFFFFFF);
material.setColor(Material.SPECULAR, 0xFFFFFFFF);
material.setShininess(100.0f);
background.setColor(0xffffcc);
}
protected void paint(Graphics g) {
graphics3d.bindTarget(g, true,
Graphics3D.DITHER |
Graphics3D.TRUE_COLOR);
graphics3d.clear(background);
//设置照相机
Transform transform = new Transform();
transform.postTranslate(0.0f, 0.0f, 30.0f);
graphics3d.setCamera(camera, transform);
//设置灯光
graphics3d.resetLights();
graphics3d.addLight(light, transform);
//设置旋转
angle += 1.0f;
transform.setIdentity();
transform.postRotate(angle, 1.0f, 1.0f, 1.0f);
graphics3d.render(vbuffer, indexbuffer, appearance, transform);
graphics3d.releaseTarget();
}
} |