m3gcanvas.java

手机3D游戏直接模式示例!!!基本3D游戏元素都有

import javax.microedition.lcdui.game.*;
import javax.microedition.lcdui.*;
import javax.microedition.m3g.*;


public class M3GCanvas extends GameCanvas implements Runnable {
	private Graphics3D g3d;
	private Graphics g2d;
	private Transform tempTransform;
	//private World world;
	private VertexBuffer vertexBuffer;
	private IndexBuffer indexBuffer;
	private Appearance appearance;
	private Mesh mesh;
	private Background bg;
	private Camera camera;
	private Light light;
	private Texture2D texImg;

	public M3GCanvas() {
		super(false);
		setFullScreenMode(false);
		// TODO Auto-generated constructor stub	
		try{
			createScene();		
		}catch(Exception e){
			System.out.println("failed to create scene");
		}
		Thread t = new Thread(this);
		t.start();
	}

	public void run() {
		// TODO Auto-generated method stub
		g2d = getGraphics();
		while(true){
			try{
				g3d.bindTarget(g2d, true, 0);
				g3d.clear(bg);
				tempTransform.postRotate(3.0f, 0.0f, 1.0f, 0.0f);
				g3d.render(mesh, tempTransform);
			}finally{
				g3d.releaseTarget();
			}
			flushGraphics();
		}
	}
	
	private void makeGeometry(){
		short []POINTS = new short[]{	
			-1,-1, 1,    1,-1, 1,   0, 1, 0,
			 1,-1, 1,    1,-1,-1,   0, 1, 0,
			 1,-1,-1,   -1,-1,-1,   0, 1, 0,
			-1,-1,-1,   -1,-1, 1,   0, 1, 0,
			-1,-1, 1,    1,-1, 1,   1,-1,-1,
			-1,-1, 1,    1,-1,-1,  -1,-1,-1,
		};	
		short []TEXTURES = new short[]{
			0,255,       255,255,       127,  0,
			0,255,       255,255,       127,  0,
			0,255,       255,255,       127,  0,
			0,255,       255,255,       127,  0,
			0,  0,       255,  0,       255,255,
			0,  0,       255,255,         0,255,
		};
		byte []COLORS = new byte[]{
			0,(byte)255,0,0,0,(byte)255,(byte)255,0,0,
			0,0,(byte)255,(byte)255,0,(byte)255,(byte)255,0,0,
			(byte)255,0,(byte)255,0,(byte)255,(byte)255,(byte)255,0,0,
			0,(byte)255,(byte)255,0,(byte)255,0,(byte)255,0,0,
			0,(byte)255,0,0,0,(byte)255,(byte)255,0,(byte)255,
			0,(byte)255,0,(byte)255,0,(byte)255,0,(byte)255,(byte)255,
		};
		byte []NORMALS = {
			0,(byte)447,(byte)894,0,(byte)447,(byte)894,0,(byte)447,(byte)894,
			(byte)894,(byte)447,0,(byte)894,(byte)447,0,(byte)894,(byte)447,0,
			0,(byte)447,(byte)-894,0,(byte)447,(byte)-894,0,(byte)447,(byte)-894,
			(byte)-894,(byte)447,0,(byte)-894,(byte)447,0,(byte)-894,(byte)447,0,
			0,(byte)-127,0,0,(byte)-127,0,0,(byte)-127,0,
			0,(byte)-127,0,0,(byte)-127,0,0,(byte)-127,0,
		};
		int []INDICES = new int[]{
			0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17	
		};
		int []LENGTH = new int[]{
			3,3,3,3,3,3
		};
		VertexArray POSITION_ARRAY = new VertexArray(POINTS.length/3,3,2);
		POSITION_ARRAY.set(0, POINTS.length/3, POINTS);
		VertexArray COLOR_ARRAY = new VertexArray(COLORS.length/3,3,1);
		COLOR_ARRAY.set(0, COLORS.length/3, COLORS);
		VertexArray NORMAL_ARRAY = new VertexArray(NORMALS.length/3,3,1);
		NORMAL_ARRAY.set(0, NORMALS.length/3, NORMALS);
		VertexArray TEXCOORD_ARRAY = new VertexArray(TEXTURES.length/2,2,2);
		TEXCOORD_ARRAY.set(0, TEXTURES.length/2, TEXTURES);
		indexBuffer = new TriangleStripArray(INDICES,LENGTH);
		vertexBuffer = new VertexBuffer();
		vertexBuffer.setPositions(POSITION_ARRAY, 1.0f, null);
		vertexBuffer.setColors(COLOR_ARRAY);
		vertexBuffer.setNormals(NORMAL_ARRAY);
		vertexBuffer.setTexCoords(0, TEXCOORD_ARRAY, 1/255.0f, null);
		mesh = new Mesh(vertexBuffer,indexBuffer,null);
	}
	 private Texture2D createBrickTexture(String path){
	        Texture2D texture = null;
	        try{
	            Image texImg = Image.createImage(path);
	            texture = new Texture2D(new Image2D(Image2D.RGB, texImg)); 
	            texture.setWrapping(Texture2D.WRAP_REPEAT, Texture2D.WRAP_REPEAT); 
	            texture.setBlending(Texture2D.FUNC_DECAL);
	            texture.setFiltering(Texture2D.FILTER_BASE_LEVEL, Texture2D.FILTER_NEAREST); 
	        }catch(Exception e){
	           
	        }        
	        
	        return texture;
	 }
	
	private void makeAppearance()throws Exception{
		appearance = new Appearance();
		CompositingMode compositionmode = new CompositingMode();
		compositionmode.setBlending(CompositingMode.ALPHA);
		compositionmode.setAlphaWriteEnable(true);
		compositionmode.setColorWriteEnable(true);
		compositionmode.setDepthWriteEnable(true);
		compositionmode.setDepthTestEnable(true);
		appearance.setCompositingMode(compositionmode);
		texImg = createBrickTexture("/texture1.png");
//		Texture2D first_texture = new Texture2D(new Image2D(Image2D.RGB,texImg));
//		first_texture.setWrapping(Texture2D.WRAP_REPEAT,Texture2D.WRAP_REPEAT);
//		first_texture.setBlending(Texture2D.FUNC_MODULATE);
//		first_texture.setFiltering(Texture2D.FILTER_BASE_LEVEL, Texture2D.FILTER_NEAREST);
//		appearance.setTexture(0, first_texture);
//		texImg = createBrickTexture("/texture2.png");
//		Texture2D second_texture = new Texture2D(new Image2D(Image2D.RGBA,texImg));
//		second_texture.setWrapping(Texture2D.WRAP_CLAMP,Texture2D.WRAP_CLAMP);
//		second_texture.setBlending(Texture2D.FUNC_DECAL);  
//		second_texture.setFiltering(Texture2D.FILTER_LINEAR, Texture2D.FILTER_LINEAR);
//		appearance.setTexture(1, second_texture);
		appearance.setTexture(0, texImg);
		Material material = new Material();
		material.setColor(Material.AMBIENT, 0x00000000);
		material.setColor(Material.EMISSIVE, 0x00000000);
		material.setColor(Material.DIFFUSE, 0xffffffff);
		material.setColor(Material.SPECULAR, 0xff000000);
		material.setShininess(1.0f);
		appearance.setMaterial(material);
		PolygonMode polygonMode = new PolygonMode();
		polygonMode.setPerspectiveCorrectionEnable(true);
		polygonMode.setWinding(PolygonMode.WINDING_CCW);
		polygonMode.setCulling(PolygonMode.CULL_BACK);
		polygonMode.setShading(PolygonMode.SHADE_SMOOTH);
		appearance.setPolygonMode(polygonMode);
		Fog fog = new Fog();
		fog.setMode(Fog.EXPONENTIAL);
		fog.setDensity(0.005f);
		fog.setColor(0xffff00);
		appearance.setFog(fog);
		mesh.setAppearance(0, appearance);
	}
	
	private void createScene()throws Exception{
		g3d = Graphics3D.getInstance();
		camera = new Camera();
		float aspect = (float)getWidth()/(float)getHeight();
		camera.setPerspective(45.0f, aspect, 1.0f, 1000.0f);
		tempTransform = new Transform();
		tempTransform.postTranslate(0, 0, 9.0f);
		g3d.setCamera(camera, tempTransform);
		light = new Light();
		light.setMode(Light.OMNI);
		light.setColor(0xff0000);
		tempTransform.setIdentity();
		tempTransform.postTranslate(0, 0, 20.0f);
		g3d.addLight(light, tempTransform);
		tempTransform.setIdentity();
		makeGeometry();
		makeAppearance();
		bg = new Background();
		bg.setColor(0x000000);
	}

}