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LightSampleCanvas.java
资源名称：J2ME&Game.rar　[点击查看]
上传用户：gyyuli
上传日期：2013-07-09
资源大小：3050k
文件大小：12k
源码类别：

J2ME

开发平台：

Java

LightSampleCanvas.java：源码内容
  3. import javax.microedition.lcdui.*;
  4. import javax.microedition.lcdui.game.*;
  6. import javax.microedition.m3g.*;
  8. class LightSampleCanvas extends GameCanvas implements Runnable{
  9.   
  10.     private Graphics3D g3d; // Graphics object used to render the world.
  11.     private World world; // This world contains the camera and the pyramidMesh.
  12.     private Camera camera; // the camera in the scene
  13.     private Mesh icosahedronMesh; // the icosahedron in the scene
  14.     private Light light;
  15.     private int lightIndex = 0;
  16.     private javax.microedition.midlet.MIDlet midlet;
  17.     private Image SwitchImage = null;
  18.     private final int SCREEN_WIDTH;
  19.     private final int SCREEN_HEIGHT;
  21.     public LightSampleCanvas(javax.microedition.midlet.MIDlet m){
  22.         super(false);
  23.         midlet = m;
  24.         try{
  25.             SwitchImage = Image.createImage("/switch.png");
  27.         }catch(Exception e){
  28.             System.out.println("FAILED TO LOAD IMAGES!!");
  29.         }
  30.           
  31.        setFullScreenMode(true);
  33.         SCREEN_WIDTH = getWidth();
  34.         SCREEN_HEIGHT = getHeight(); 
  35.        
  36.         g3d = Graphics3D.getInstance();
  37.         world = new World();
  39.         camera = new Camera();
  40.         world.addChild(camera); // add the camera to the world.
  42.         light = new Light();                    // Create a new light
  43.         light.translate(0.0f, 0.0f, -1.0f); // The light position
  44.         light.setMode(Light.SPOT);   // Light Mode
  45.         light.setColor(0xFFFFFF);           // The color of the light 'WHITE'
  46.         light.setSpotExponent(128.0f); // splot light concentration 0 to 128
  47.         light.setSpotAngle(60);
  48.         world.addChild(light);                // Add the light to the world to be rendered.
  50.         // Constructs a perspective projection matrix and sets that as the current projection matrix.
  51.         camera.setPerspective(60.0f, (float)SCREEN_WIDTH / (float)SCREEN_HEIGHT, 0.1f, 50f);
  52.         
  53.         
  54.         icosahedronMesh = createIcosahedron(); // create our Icosahedron.
  55.         
  56.         icosahedronMesh.setTranslation(0.0f, 0.0f, -3.0f); // move the icosahedron 3 units into the screen.
  57.         world.addChild(icosahedronMesh);
  59.         world.setActiveCamera(camera);
  60.         
  61.         Thread t = new Thread(this);
  62.         t.start();
  63.     }
  64.     
  65.     public void keyPressed(int key){
  66.         switch(key){
  67.           
  68.             case -7:
  69.                 nextLight();    // change light
  70.                 break;
  71.             case -11:
  72.                 midlet.notifyDestroyed();
  73.                 break;
  74.         }
  75.     }
  76.     
  77.     /*
  78.      * Change the Light Mode to be used.
  79.      */
  80.     public void nextLight(){
  81.         //lightIndex = lightIndex == 3?0:lightIndex+1;
  82.         lightIndex = 3;
  83.         switch(lightIndex){
  84.             case 0:
  85.                 light.setMode(Light.AMBIENT);
  86.                 break;
  87.             case 1:
  88.                 light.setMode(Light.DIRECTIONAL);
  89.                 break;
  90.             case 2:
  91.                 light.setMode(Light.OMNI);
  92.                 break;
  93.             case 3:
  94.                 light.setMode(Light.SPOT);
  95.                 break;
  96.         }
  97.     }
  98.     
  100.     
  101.     public void draw3D(Graphics g){
  102.         g.setColor(0x000000);
  103.         g.fillRect(0, 0, getWidth(), getHeight());
  104.         try{
  105.             g3d.bindTarget(g); // Binds the given Graphics or mutable Image2D as the rendering target of this Graphics3D
  106.             g3d.render(world); // Render the world
  107.         }finally{
  108.             g3d.releaseTarget();
  109.         }
  110.     }
  112.     private void draw2D(Graphics g){
  113.         g.setColor(0xFFFFFF);
  114.         switch(lightIndex){
  115.             case 0:
  116.                 g.drawString("Ambient", 0, 0, 0);
  117.                 break;
  118.             case 1:
  119.                 g.drawString("Directional", 0, 0, 0);
  120.                 break;
  121.             case 2:
  122.                 g.drawString("Omni", 0, 0, 0);
  123.                 break;
  124.             case 3:
  125.                 g.drawString("Spot", 0, 0, 0);
  126.                 break;
  127.         }
  128.         
  129.         g.drawImage(SwitchImage, SCREEN_WIDTH, SCREEN_HEIGHT, Graphics.RIGHT | Graphics.BOTTOM);
  130.     }
  131.     
  132.     public void run() {
  133.         Graphics g = getGraphics();
  135.         while(true){
  136.             
  137.        
  138.                // icosahedronMesh.postRotate(1.0f, 0.0f, 1.0f, 0.0f);
  139.              
  140.         
  141.       //  light.postRotate(1.0f, 1.0f, 0.0f, 0.0f); //enable this to make the light rotate around it's x-axis
  142.         
  143.             draw3D(g);
  144.             draw2D(g);
  145.             
  146.             flushGraphics();
  147.         }
  148.     }
  151.     private Mesh createIcosahedron(){
  152.         final short X = 525;
  153.         final short Z = 850;
  154.         short[]ORG_POINTS = new short[] {-X, 0, Z,      X, 0, Z,    -X, 0, -Z,      X, 0, -Z,
  155.                                                                    0, Z, X,      0, Z, -X,    0, -Z, X,      0, -Z, -X,
  156.                                                                    Z, X, 0,     -Z, X, 0,     Z, -X, 0,     -Z, -X, 0};
  158.         int []ORG_INDICES = new int[] {0,4, 1,        0,9,4,       9,5,4,       4,5,8,      4,8,1,
  159.                                                             8,10,1,       8,3,10,     5,3,8,       5,2,3,       2,7,3,
  160.                                                             7,10,3,       7,6,10,     7,11,6,     11,0,6,     0,1,6,
  161.                                                             6,1,10,       9,0,11,     9,11,2,     9,2,5,       7,2,11};
  164.         short[]POINTS = new short[72*3];
  165.         int []INDICES = new int[80*3+80];
  167.         for(int i=0; i<36; i++){
  168.             POINTS[i] = ORG_POINTS[i];
  169.         }
  170.         for(int i=0; i<60; i++){
  171.             INDICES[i] = ORG_INDICES[i];
  172.         }
  173.         
  174.         // Start sub deviding
  175.         // every triangle should become 4 triangles.
  176.         VEK v12, v23, v31;
  177.         int pointIndex = 36;
  178.         int numPoints  = 12;
  179.         int indiceIndex = 60;
  180.         for(int i=0; i<60; i+=3){
  181.             VEK v1 = new VEK(POINTS[INDICES[i]*3], POINTS[INDICES[i]*3+1], POINTS[INDICES[i]*3+2]);
  182.             VEK v2 = new VEK(POINTS[INDICES[i+1]*3], POINTS[INDICES[i+1]*3+1], POINTS[INDICES[i+1]*3+2]);
  183.             VEK v3 = new VEK(POINTS[INDICES[i+2]*3], POINTS[INDICES[i+2]*3+1], POINTS[INDICES[i+2]*3+2]);
  185.             v12 = new VEK(v1.X + v2.X, v1.Y + v2.Y, v1.Z+v2.Z);
  186.             v23 = new VEK(v2.X + v3.X, v2.Y + v3.Y, v2.Z+v3.Z);
  187.             v31 = new VEK(v3.X + v1.X, v3.Y + v1.Y, v3.Z+v1.Z);
  189.             v12 = MATH.vekNormalizePoint(v12);
  190.             v23 = MATH.vekNormalizePoint(v23);
  191.             v31 = MATH.vekNormalizePoint(v31);
  192.             
  193.             // 3 new points
  194.             POINTS[pointIndex] = v12.X;     // numPoints
  195.             POINTS[pointIndex+1] = v12.Y;
  196.             POINTS[pointIndex+2] = v12.Z;
  198.             POINTS[pointIndex+3] = v23.X; // numPoints + 1
  199.             POINTS[pointIndex+4] = v23.Y;
  200.             POINTS[pointIndex+5] = v23.Z;
  202.             POINTS[pointIndex+6] = v31.X; // numPoints + 2
  203.             POINTS[pointIndex+7] = v31.Y;
  204.             POINTS[pointIndex+8] = v31.Z;
  205.             pointIndex+=9;
  206.             
  207.             // 4 new triangles
  208.             INDICES[indiceIndex] = INDICES[i];
  209.             INDICES[indiceIndex+1] = numPoints;
  210.             INDICES[indiceIndex+2] = numPoints+2;
  212.             INDICES[indiceIndex+3] = INDICES[i+1];
  213.             INDICES[indiceIndex+4] = numPoints+1;
  214.             INDICES[indiceIndex+5] = numPoints;
  216.             INDICES[indiceIndex+6] = INDICES[i+2];
  217.             INDICES[indiceIndex+7] = numPoints+2;
  218.             INDICES[indiceIndex+8] = numPoints+1;
  219.             
  220.             INDICES[indiceIndex+9] = numPoints;
  221.             INDICES[indiceIndex+10] = numPoints+1;
  222.             INDICES[indiceIndex+11] = numPoints+2;
  223.             
  224.             indiceIndex += 12;
  225.             numPoints +=3;
  226.         }
  227.         
  228.         // a normal is created for every point.
  229.         short[] NORMALS = new short[POINTS.length];
  230.         VEK a, b, c;
  231.          for(int i=0; i<NORMALS.length; i+=3){
  232.              a = new VEK(POINTS[i], POINTS[i+1], POINTS[i+2]);
  233.              VEK v = MATH.vekNormalizeNormal(a);
  234.              NORMALS[i] = v.X;
  235.              NORMALS[i+1] = v.Y;
  236.              NORMALS[i+2] = v.Z;
  237.          }
  238.         
  239.         
  240.         int []LENGTH = new int[100];// {3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3};
  241.         for(int i=0; i<100; i++){
  242.             LENGTH[i] = 3;
  243.         }
  244.         VertexArray POSITION_ARRAY, NORMAL_ARRAY;
  245.         IndexBuffer INDEX_BUFFER;
  246.         
  247.         // Create a VertexArray to be used by the VertexBuffer
  248.         POSITION_ARRAY = new VertexArray(POINTS.length / 3, 3, 2);
  249.         POSITION_ARRAY.set(0, POINTS.length / 3, POINTS);
  250.         NORMAL_ARRAY = new VertexArray(NORMALS.length / 3, 3, 2);
  251.         NORMAL_ARRAY.set(0, NORMALS.length / 3, NORMALS);
  252.         INDEX_BUFFER = new TriangleStripArray(INDICES, LENGTH);
  254.         // VertexBuffer holds references to VertexArrays that contain the positions, colors, normals, 
  255.         // and texture coordinates for a set of vertices
  256.         VertexBuffer vertexBuffer = new VertexBuffer();
  257.         vertexBuffer.setPositions(POSITION_ARRAY,(1.0f/1000.0f), null);
  258.         vertexBuffer.setNormals(NORMAL_ARRAY);
  259.         
  260.         // Create the 3D object defined as a polygonal surface
  261.         Mesh mesh = new Mesh(vertexBuffer, INDEX_BUFFER, null);
  262.         
  263.         Appearance appearance = new Appearance(); // A set of component objects that define the rendering attributes of a Mesh
  264.         PolygonMode polygonMode = new PolygonMode(); // An Appearance component encapsulating polygon-level attributes
  265.         polygonMode.setPerspectiveCorrectionEnable(true);
  266.         polygonMode.setCulling(PolygonMode.CULL_FRONT); // Use CULL_FRONT for performance
  267.         appearance.setPolygonMode(polygonMode);
  269.         Material material = new Material();
  270.         material.setColor(Material.AMBIENT, 0xFFFFFF);
  271.         material.setVertexColorTrackingEnable(true);
  272.         appearance.setMaterial(material);
  273.  
  274.         mesh.setAppearance(0, appearance); // Set the appearance to the 3D object        
  276.         return mesh;
  277.     }
  278. }
  280. class VEK{
  281.     public short X;
  282.     public short Y;
  283.     public short Z;
  285.     public VEK(){
  286.         X=Y=Z=0;
  287.     }
  289.     public VEK(int x, int y, int z){
  290.         X = (short)x;
  291.         Y = (short)y;
  292.         Z = (short)z;
  293.     }
  294.     public String toString(){
  295.         return "X=" + X + " Y=" + Y + " Z=" + Z;
  296.     }
  297. }
  299. /*
  300.  *  A few extra math methods used to create the Icosahedron
  301.  */
  302. class MATH{
  303.     public static VEK vekCalculateNormal(VEK v1, VEK v2, VEK v3)  // calculate the normal for a triangle
  304.     {
  305.             VEK q = new VEK(v2.X - v1.X, v2.Y- v1.Y, v2.Z -v1.Z);
  306.             VEK p = new VEK(v3.X - v1.X, v3.Y- v1.Y, v3.Z -v1.Z);
  307.             VEK c = new VEK(p.Y*q.Z - p.Z * q.Y, p.Z*q.X - p.X*q.Z, p.X*q.Y - p.Y*q.X);
  308.             return c;
  309.     }
  311.     public static double vekLength(VEK u) // return the length of the vektor
  312.     {
  313.             return Math.sqrt((u.X*u.X) + (u.Y*u.Y) + (u.Z*u.Z));
  314.     }
  315.     
  316.     public static VEK vekNormalizeNormal(VEK u)  // Normalize a NORMAL
  317.     {
  318.             double length = vekLength(u);
  320.             if(length==0){
  321.                     u.X=u.Y=u.Z=0;
  322.                      return u;
  323.             }
  324.             double a, b, c;
  325.             a = u.X / length;
  326.             b = u.Y / length;
  327.             c = u.Z / length;
  328.             a *= 127;
  329.             b *= 127;
  330.             c *= 127;
  331.             u.X = (short)(a);
  332.             u.Y = (short)(b);
  333.             u.Z = (short)(c);
  334.             return u;
  335.     }
  337.     public static VEK vekNormalizePoint(VEK u)  // Normalize a POINT
  338.     {
  339.             double length = vekLength(u);
  341.             if(length==0){
  342.                     u.X=u.Y=u.Z=0;
  343.                      return u;
  344.             }
  345.             double a, b, c;
  346.             a = u.X / length;
  347.             b = u.Y / length;
  348.             c = u.Z / length;
  349.             a *= 1000;
  350.             b *= 1000;
  351.             c *= 1000;
  352.             u.X = (short)(a);
  353.             u.Y = (short)(b);
  354.             u.Z = (short)(c);
  355.             return u;
  356.     }
  357. }