Java 类com.badlogic.gdx.graphics.Mesh 实例源码

@Override
public void create() {

        rotationSpeed = 0.5f;
        mesh = new Mesh(true, 4, 6,
                        new VertexAttribute(VertexAttributes.Usage.Position, 3,"attr_Position"),
                        new VertexAttribute(Usage.TextureCoordinates, 2, "attr_texCoords"));
        texture = new Texture(Gdx.files.internal("data/Jellyfish.jpg"));
        mesh.setVertices(new float[] { 
                         -1024f, -1024f, 0, 0, 1,
                          1024f, -1024f, 0, 1, 1,
                          1024f,  1024f, 0, 1, 0,
                         -1024f,  1024f, 0, 0, 0
        });
        mesh.setIndices(new short[] { 0, 1, 2, 2, 3, 0 });

        cam = new OrthographicCamera(Gdx.graphics.getWidth(), Gdx.graphics.getHeight());            
        xScale = Gdx.graphics.getWidth()/(float)TARGET_WIDTH;
        yScale = Gdx.graphics.getHeight()/(float)TARGET_HEIGHT;
        font = loadBitmapFont("default.fnt", "default.png");
        scale = Math.min(xScale, yScale);
        cam.zoom = 1/scale;
      //  cam.project(start_position);
        cam.position.set(0, 0, 0);
        batch = new SpriteBatch();
}

/**
 * Instantiates a new ShaderEffect. The ShaderEffect will NOT own shader
 * program, so it will not dispose it either!
 * 
 * @param program
 *            the ShaderProgram to use for this effect
 */
public ShaderEffect(ShaderProgram program) {
    this.program = program;

    if (meshRefCount++ <= 0) {
        mesh = new Mesh(VertexDataType.VertexArray, true, 4, 0,
                new VertexAttribute(Usage.Position, 2, ShaderProgram.POSITION_ATTRIBUTE),
                new VertexAttribute(Usage.TextureCoordinates, 2, ShaderProgram.TEXCOORD_ATTRIBUTE + "0"));

        // @formatter:off
        float[] verts = {
                // vertex    texture
                  -1, -1,    0f, 0f,
                   1, -1,    1f, 0f,
                   1,  1,    1f, 1f,
                  -1,  1,    0f, 1f,
        };
        // @formatter:on

        mesh.setVertices(verts);
    }
}

public void rebuildModel(Chunk chunk) {
    // System.out.println("m"+c.x+" "+c.z);

    if (chunk != c) {
        System.out
                .println("On essais de build le model du mauvais chunk !");
        return;
    }

    if (c.disposed) {
        return;// disposed...
    }

    Mesh ancienMeshSol = c.modelSol;

    c.modelSol = buildModelSol();

    if (ancienMeshSol != null) {
        ancienMeshSol.dispose();
    }
    c.changed = true;
}

public void init() {
    final int numVertices = this.vertexResolution * this.vertexResolution;
    final int numIndices = (this.vertexResolution-1) * (this.vertexResolution-1) * 6;

    mesh = new Mesh(true, numVertices, numIndices, attribs);
    this.vertices = new float[numVertices * stride];
    mesh.setIndices(buildIndices());
    buildVertices();
    mesh.setVertices(vertices);

    MeshPart meshPart = new MeshPart(null, mesh, 0, numIndices, GL30.GL_TRIANGLES);
    meshPart.update();
    ModelBuilder mb = new ModelBuilder();
    mb.begin();
    mb.part(meshPart, material);
    model = mb.end();
    modelInstance = new ModelInstance(model);
    modelInstance.transform = transform;
}

public PositionalLight (RayHandler rayHandler, int rays, Color color, float distance, float x, float y, float directionDegree) {
    super(rayHandler, rays, color, directionDegree, distance);
    start.x = x;
    start.y = y;
    sin = new float[rays];
    cos = new float[rays];
    endX = new float[rays];
    endY = new float[rays];

    lightMesh = new Mesh(VertexDataType.VertexArray, false, vertexNum, 0, new VertexAttribute(Usage.Position, 2,
        "vertex_positions"), new VertexAttribute(Usage.ColorPacked, 4, "quad_colors"),
        new VertexAttribute(Usage.Generic, 1, "s"));
    softShadowMesh = new Mesh(VertexDataType.VertexArray, false, vertexNum * 2, 0, new VertexAttribute(Usage.Position, 2,
        "vertex_positions"), new VertexAttribute(Usage.ColorPacked, 4, "quad_colors"),
        new VertexAttribute(Usage.Generic, 1, "s"));
    setMesh();
}

/** Directional lights simulate light source that locations is at infinite distance. Direction and intensity is same everywhere.
 * -90 direction is straight from up.
 * 
 * @param rayHandler
 * @param rays
 * @param color
 * @param directionDegree */
public DirectionalLight (RayHandler rayHandler, int rays, Color color, float directionDegree) {

    super(rayHandler, rays, color, directionDegree, Float.POSITIVE_INFINITY);

    vertexNum = (vertexNum - 1) * 2;

    start = new Vector2[rayNum];
    end = new Vector2[rayNum];
    for (int i = 0; i < rayNum; i++) {
        start[i] = new Vector2();
        end[i] = new Vector2();
    }
    setDirection(direction);

    lightMesh = new Mesh(VertexDataType.VertexArray, staticLight, vertexNum, 0, new VertexAttribute(Usage.Position, 2,
        "vertex_positions"), new VertexAttribute(Usage.ColorPacked, 4, "quad_colors"),
        new VertexAttribute(Usage.Generic, 1, "s"));
    softShadowMesh = new Mesh(VertexDataType.VertexArray, staticLight, vertexNum, 0, new VertexAttribute(Usage.Position, 2,
        "vertex_positions"), new VertexAttribute(Usage.ColorPacked, 4, "quad_colors"),
        new VertexAttribute(Usage.Generic, 1, "s"));
    update();
}

/** Creates chain light from specified vertices
 * 
 * @param rayHandler not {@code null} instance of RayHandler
 * @param rays number of rays - more rays make light to look more realistic but will decrease performance, can't be less than
 *           MIN_RAYS
 * @param color color, set to {@code null} to use the default color
 * @param distance distance of light
 * @param rayDirection direction of rays
 *           <ul>
 *           <li>1 = left</li>
 *           <li>-1 = right</li>
 *           </ul>
 * @param chain float array of (x, y) vertices from which rays will be evenly distributed */
public RavChainLight (RayHandler rayHandler, int rays, Color color, float distance, int rayDirection, float[] chain) {
    super(rayHandler, rays, color, distance, 0f);

    rayStartOffset = ChainLight.defaultRayStartOffset;
    this.rayDirection = rayDirection;
    vertexNum = (vertexNum - 1) * 2;
    endX = new float[rays];
    endY = new float[rays];
    startX = new float[rays];
    startY = new float[rays];
    this.chain = (chain != null) ? new FloatArray(chain) : new FloatArray();

    lightMesh = new Mesh(VertexDataType.VertexArray, false, vertexNum, 0,
        new VertexAttribute(Usage.Position, 2, "vertex_positions"), new VertexAttribute(Usage.ColorPacked, 4, "quad_colors"),
        new VertexAttribute(Usage.Generic, 1, "s"));
    softShadowMesh = new Mesh(VertexDataType.VertexArray, false, vertexNum * 2, 0,
        new VertexAttribute(Usage.Position, 2, "vertex_positions"), new VertexAttribute(Usage.ColorPacked, 4, "quad_colors"),
        new VertexAttribute(Usage.Generic, 1, "s"));
    setMesh();
}

/**
     * Generates a convex hull based on the model as the shape
     */
    public EntityConstructor(String name, Model model, float mass, boolean disableDeactivation) {
        Mesh modelMesh = model.meshes.get(0);
        btCollisionShape shape = new btConvexHullShape(modelMesh.getVerticesBuffer(), modelMesh.getNumVertices(), modelMesh.getVertexSize());


//        btTriangleIndexVertexArray i = new btTriangleIndexVertexArray(model.meshParts);
//        btGImpactMeshShape shapeImp = new btGImpactMeshShape(i);
//
//        shapeImp.setLocalScaling(new Vector3(1f, 1f, 1f));
//        shapeImp.setMargin(0.05f);
//        shapeImp.updateBound();
//        optimizing the shape
//        btShapeHull hull = new btShapeHull((btConvexShape) shape);
//        hull.buildHull(shape.getMargin());

//        shape = new btConvexHullShape(hull);

//        btCompoundShape shape = new btCompoundShape();
//        shape.addChildShape(new Matrix4(), shapeImp);

        createConstructionInfo(name, model, mass, shape, disableDeactivation);
    }

public void init() {
    final int numVertices = this.vertexResolution * vertexResolution;
    final int numIndices = (this.vertexResolution - 1) * (vertexResolution - 1) * 6;

    mesh = new Mesh(true, numVertices, numIndices, attribs);
    this.vertices = new float[numVertices * stride];
    mesh.setIndices(buildIndices());
    buildVertices();
    mesh.setVertices(vertices);

    MeshPart meshPart = new MeshPart(null, mesh, 0, numIndices, GL20.GL_TRIANGLES);
    meshPart.update();
    ModelBuilder mb = new ModelBuilder();
    mb.begin();
    mb.part(meshPart, material);
    model = mb.end();
    modelInstance = new ModelInstance(model);
    modelInstance.transform = transform;
}

/**
 * Creates Vector3 objects from the vertices of the mesh. The resulting array follows the ordering of the provided
 * index array.
 *
 * @param mesh
 * @param indices
 * @return
 */
private static Vector3[] createVertexVectors(Mesh mesh, short[] indices) {
    FloatBuffer verticesBuffer = mesh.getVerticesBuffer();
    int positionOffset = mesh.getVertexAttributes().findByUsage(VertexAttributes.Usage.Position).offset / 4;
    int vertexSize = mesh.getVertexSize() / 4;
    Vector3[] vertexVectors = new Vector3[mesh.getNumIndices()];
    for (int i = 0; i < indices.length; i++) {
        short index = indices[i];
        int a = index * vertexSize + positionOffset;
        float x = verticesBuffer.get(a++);
        float y = verticesBuffer.get(a++);
        float z = verticesBuffer.get(a);
        vertexVectors[index] = new Vector3(x, y, z);
    }
    return vertexVectors;
}

public static Model createInfiniteWaterPart(TypeInterpreter interpreter, int landscapeIndex, PlanetConfig planetConfig) {
    ModelBuilder modelBuilder = new ModelBuilder();
    MeshBuilder builder = new MeshBuilder();
    float waterHeight = interpreter.it.get(landscapeIndex).endValue;
    builder.begin(PlanetPart.VERTEX_ATTRIBUTES, GL20.GL_TRIANGLES);
    infiniteWaterHeight = waterHeight * planetConfig.landscapeHeight - 1;
    Vector3 corner01 = new Vector3(-INFINITE_WATER_SIZE, -INFINITE_WATER_SIZE, infiniteWaterHeight);
    Vector3 corner02 = new Vector3(INFINITE_WATER_SIZE, -INFINITE_WATER_SIZE, infiniteWaterHeight);
    Vector3 corner03 = new Vector3(INFINITE_WATER_SIZE, INFINITE_WATER_SIZE, infiniteWaterHeight);
    Vector3 corner04 = new Vector3(-INFINITE_WATER_SIZE, INFINITE_WATER_SIZE, infiniteWaterHeight);
    builder.rect(corner01, corner02, corner03, corner04, new Vector3(0, 0, 1));
    Material waterMaterial = planetConfig.layerConfigs.get(landscapeIndex).material;
    Mesh mesh = builder.end();
    modelBuilder.begin();
    modelBuilder.part(PlanetPart.LANDSCAPE_PART_NAME + landscapeIndex, mesh, GL20.GL_TRIANGLES, waterMaterial);
    return modelBuilder.end();
}

/**
 * Creates a water plane.
 * @param chunk The chunk.
 */
private void createWaterPart(Chunk chunk, int landscapeIndex) {
    MeshBuilder builder = meshBuilders.get(landscapeIndex);
    float WATER_HEIGHT = interpreter.it.get(landscapeIndex).endValue;
    builder.begin(VERTEX_ATTRIBUTES, GL20.GL_TRIANGLES);
    float z = WATER_HEIGHT * planetConfig.landscapeHeight;
    float width = chunk.getWidth() * tileSize;
    float height = chunk.getHeight() * tileSize;

    Vector3 corner01 = new Vector3(0f, 0f, z);
    Vector3 corner02 = new Vector3(width, 0f, z);
    Vector3 corner03 = new Vector3(width, height, z);
    Vector3 corner04 = new Vector3(0f, height, z);

    builder.rect(corner01, corner02, corner03, corner04, new Vector3(0, 0, 1));
    Material waterMaterial = planetConfig.layerConfigs.get(landscapeIndex).material;
    Mesh mesh = builder.end();
    modelBuilder.node().id = LANDSCAPE_NODE_NAME + landscapeIndex;
    modelBuilder.part(LANDSCAPE_PART_NAME + landscapeIndex, mesh, GL20.GL_TRIANGLES, waterMaterial);
}

private void buildMesh() {
  mesh = new Mesh(true, SIZE, 6, VertexAttribute.Position(), VertexAttribute.TexCoords(0));
  mesh.setVertices(vertices);

  short[] indices = new short[6];
  int v = 0;
  for (int i = 0; i < indices.length; i += 6, v += 4) {
    indices[i] = (short)(v);
    indices[i + 1] = (short)(v + 2);
    indices[i + 2] = (short)(v + 1);
    indices[i + 3] = (short)(v + 1);
    indices[i + 4] = (short)(v + 2);
    indices[i + 5] = (short)(v + 3);
  }

  mesh.setIndices(indices);
}

public static Mesh build(float size, TextureRegion region) {
  Mesh mesh = new Mesh(true, SIZE, 6, VertexAttribute.Position(), VertexAttribute.TexCoords(0));
  mesh.setVertices(verticies(size, region));
  mesh.setAutoBind(false);
  short[] indices = new short[6];
  int v = 0;
  for (int i = 0; i < indices.length; i += 6, v += 4) {
    indices[i] = (short)(v);
    indices[i + 1] = (short)(v + 2);
    indices[i + 2] = (short)(v + 1);
    indices[i + 3] = (short)(v + 1);
    indices[i + 4] = (short)(v + 2);
    indices[i + 5] = (short)(v + 3);
  }

  mesh.setIndices(indices);

  return mesh;
}

public ImmediateModeRenderer20 (int maxVertices, boolean hasNormals, boolean hasColors, int numTexCoords, ShaderProgram shader) {
    this.maxVertices = maxVertices;
    this.numTexCoords = numTexCoords;
    this.shader = shader;

    VertexAttribute[] attribs = buildVertexAttributes(hasNormals, hasColors, numTexCoords);
    mesh = new Mesh(false, maxVertices, 0, attribs);

    vertices = new float[maxVertices * (mesh.getVertexAttributes().vertexSize / 4)];
    vertexSize = mesh.getVertexAttributes().vertexSize / 4;
    normalOffset = mesh.getVertexAttribute(Usage.Normal) != null ? mesh.getVertexAttribute(Usage.Normal).offset / 4 : 0;
    colorOffset = mesh.getVertexAttribute(Usage.ColorPacked) != null ? mesh.getVertexAttribute(Usage.ColorPacked).offset / 4
        : 0;
    texCoordOffset = mesh.getVertexAttribute(Usage.TextureCoordinates) != null ? mesh
        .getVertexAttribute(Usage.TextureCoordinates).offset / 4 : 0;

    shaderUniformNames = new String[numTexCoords];
    for (int i = 0; i < numTexCoords; i++) {
        shaderUniformNames[i] = "u_sampler" + i;
    }
}

/** Initializes the batch with the given amount of decal objects the buffer is able to hold when full.
 * 
 * @param size Maximum size of decal objects to hold in memory */
public void initialize (int size) {
    vertices = new float[size * Decal.SIZE];
    mesh = new Mesh(Mesh.VertexDataType.VertexArray, false, size * 4, size * 6, new VertexAttribute(
        VertexAttributes.Usage.Position, 3, ShaderProgram.POSITION_ATTRIBUTE), new VertexAttribute(
        VertexAttributes.Usage.ColorPacked, 4, ShaderProgram.COLOR_ATTRIBUTE), new VertexAttribute(
        VertexAttributes.Usage.TextureCoordinates, 2, ShaderProgram.TEXCOORD_ATTRIBUTE + "0"));

    short[] indices = new short[size * 6];
    int v = 0;
    for (int i = 0; i < indices.length; i += 6, v += 4) {
        indices[i] = (short)(v);
        indices[i + 1] = (short)(v + 2);
        indices[i + 2] = (short)(v + 1);
        indices[i + 3] = (short)(v + 1);
        indices[i + 4] = (short)(v + 2);
        indices[i + 5] = (short)(v + 3);
    }
    mesh.setIndices(indices);
}

@Deprecated
public static Model createFromMesh (final Mesh mesh, int indexOffset, int vertexCount, int primitiveType,
    final Material material) {
    Model result = new Model();
    MeshPart meshPart = new MeshPart();
    meshPart.id = "part1";
    meshPart.indexOffset = indexOffset;
    meshPart.numVertices = vertexCount;
    meshPart.primitiveType = primitiveType;
    meshPart.mesh = mesh;

    NodePart partMaterial = new NodePart();
    partMaterial.material = material;
    partMaterial.meshPart = meshPart;
    Node node = new Node();
    node.id = "node1";
    node.parts.add(partMaterial);

    result.meshes.add(mesh);
    result.materials.add(material);
    result.nodes.add(node);
    result.meshParts.add(meshPart);
    result.manageDisposable(mesh);
    return result;
}

/** End building the mesh and returns the mesh */
public Mesh end () {
    if (this.attributes == null) throw new RuntimeException("Call begin() first");
    endpart();

    final Mesh mesh = new Mesh(true, vertices.size / stride, indices.size, attributes);
    mesh.setVertices(vertices.items, 0, vertices.size);
    mesh.setIndices(indices.items, 0, indices.size);

    for (MeshPart p : parts)
        p.mesh = mesh;
    parts.clear();

    attributes = null;
    vertices.clear();
    indices.clear();

    return mesh;
}

@Override
public void setMesh(Mesh mesh, Model model){
    super.setMesh(mesh, model);
    vertexSize = mesh.getVertexSize()/4;
    positionOffset = mesh.getVertexAttribute(Usage.Position).offset/4;
    int indicesCount = mesh.getNumIndices();
    if(indicesCount >0){
        indices = new short[indicesCount];
        mesh.getIndices(indices);
        triangleCount = indices.length/3;
    }
    else indices = null;
    vertexCount = mesh.getNumVertices();
    vertices = new float[ vertexCount* vertexSize];
    mesh.getVertices(vertices);
}

/** Constructs a new PolygonSpriteBatch. Sets the projection matrix to an orthographic projection with y-axis point upwards,
 * x-axis point to the right and the origin being in the bottom left corner of the screen. The projection will be pixel perfect
 * with respect to the current screen resolution.
 * <p>
 * The defaultShader specifies the shader to use. Note that the names for uniforms for this default shader are different than
 * the ones expect for shaders set with {@link #setShader(ShaderProgram)}. See {@link SpriteBatch#createDefaultShader()}.
 * @param size The max number of vertices and number of triangles in a single batch. Max of 10920.
 * @param defaultShader The default shader to use. This is not owned by the PolygonSpriteBatch and must be disposed separately. */
public PolygonSpriteBatch (int size, ShaderProgram defaultShader) {
    // 32767 is max index, so 32767 / 3 - (32767 / 3 % 3) = 10920.
    if (size > 10920) throw new IllegalArgumentException("Can't have more than 10920 triangles per batch: " + size);

    mesh = new Mesh(VertexDataType.VertexArray, false, size, size * 3, new VertexAttribute(Usage.Position, 2,
        ShaderProgram.POSITION_ATTRIBUTE), new VertexAttribute(Usage.ColorPacked, 4, ShaderProgram.COLOR_ATTRIBUTE),
        new VertexAttribute(Usage.TextureCoordinates, 2, ShaderProgram.TEXCOORD_ATTRIBUTE + "0"));

    vertices = new float[size * VERTEX_SIZE];
    triangles = new short[size * 3];

    if (defaultShader == null) {
        shader = SpriteBatch.createDefaultShader();
        ownsShader = true;
    } else
        shader = defaultShader;

    projectionMatrix.setToOrtho2D(0, 0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
}

@Override
public void flush () {
    if (vertexIndex == 0) return;

    renderCalls++;
    totalRenderCalls++;
    int trianglesInBatch = triangleIndex;
    if (trianglesInBatch > maxTrianglesInBatch) maxTrianglesInBatch = trianglesInBatch;

    lastTexture.bind();
    Mesh mesh = this.mesh;
    mesh.setVertices(vertices, 0, vertexIndex);
    mesh.setIndices(triangles, 0, triangleIndex);

    if (blendingDisabled) {
        Gdx.gl.glDisable(GL20.GL_BLEND);
    } else {
        Gdx.gl.glEnable(GL20.GL_BLEND);
        if (blendSrcFunc != -1) Gdx.gl.glBlendFunc(blendSrcFunc, blendDstFunc);
    }

    mesh.render(customShader != null ? customShader : shader, GL20.GL_TRIANGLES, 0, trianglesInBatch);

    vertexIndex = 0;
    triangleIndex = 0;
}

@Override
public void onSurfaceCreated (javax.microedition.khronos.opengles.GL10 gl, EGLConfig config) {
    eglContext = ((EGL10)EGLContext.getEGL()).eglGetCurrentContext();
    setupGL(gl);
    logConfig(config);
    updatePpi();

    Mesh.invalidateAllMeshes(app);
    Texture.invalidateAllTextures(app);
    Cubemap.invalidateAllCubemaps(app);
    ShaderProgram.invalidateAllShaderPrograms(app);
    FrameBuffer.invalidateAllFrameBuffers(app);

    logManagedCachesStatus();

    Display display = app.getWindowManager().getDefaultDisplay();
    this.width = display.getWidth();
    this.height = display.getHeight();
    this.mean = new WindowedMean(5);
    this.lastFrameTime = System.nanoTime();

    gl.glViewport(0, 0, this.width, this.height);
}

@Override
public void getRenderables (Array<Renderable> renderables, Pool<Renderable> pool) {
    renderedChunks = 0;
    for (int i = 0; i < chunks.length; i++) {
        VoxelChunk chunk = chunks[i];
        Mesh mesh = meshes[i];
        if (dirty[i]) {
            int numVerts = chunk.calculateVertices(vertices);
            numVertices[i] = numVerts / 4 * 6;
            mesh.setVertices(vertices, 0, numVerts * VoxelChunk.VERTEX_SIZE);
            dirty[i] = false;
        }
        if (numVertices[i] == 0) continue;
        Renderable renderable = pool.obtain();
        renderable.material = materials[i];
        renderable.mesh = mesh;
        renderable.meshPartOffset = 0;
        renderable.meshPartSize = numVertices[i];
        renderable.primitiveType = GL20.GL_TRIANGLES;
        renderables.add(renderable);
        renderedChunks++;
    }
}

public void setupScene () {
    plane = new Mesh(true, 4, 6, new VertexAttribute(Usage.Position, 3, ShaderProgram.POSITION_ATTRIBUTE), new VertexAttribute(
        Usage.Normal, 3, ShaderProgram.NORMAL_ATTRIBUTE));
    plane.setVertices(new float[] {-10, -1, 10, 0, 1, 0, 10, -1, 10, 0, 1, 0, 10, -1, -10, 0, 1, 0, -10, -1, -10, 0, 1, 0});
    plane.setIndices(new short[] {3, 2, 1, 1, 0, 3});

    texture = new Texture(Gdx.files.internal("data/badlogic.jpg"), Format.RGB565, true);
    texture.setFilter(TextureFilter.MipMap, TextureFilter.Nearest);

    cam = new PerspectiveCamera(67, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
    cam.position.set(0, 5, 10);
    cam.lookAt(0, 0, 0);
    cam.update();
    controller = new PerspectiveCamController(cam);

    projector = new PerspectiveCamera(67, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
    projector.position.set(2, 3, 2);
    projector.lookAt(0, 0, 0);
    projector.normalizeUp();
    projector.update();
}

@Override
public void create () {
    String vertexShader = "attribute vec4 a_position;    \n" + "attribute vec4 a_color;\n" + "attribute vec2 a_texCoord0;\n"
        + "uniform mat4 u_worldView;\n" + "varying vec4 v_color;" + "varying vec2 v_texCoords;"
        + "void main()                  \n" + "{                            \n" + "   v_color = vec4(1, 1, 1, 1); \n"
        + "   v_texCoords = a_texCoord0; \n" + "   gl_Position =  u_worldView * a_position;  \n"
        + "}                            \n";
    String fragmentShader = "#ifdef GL_ES\n" + "precision mediump float;\n" + "#endif\n" + "varying vec4 v_color;\n"
        + "varying vec2 v_texCoords;\n" + "uniform sampler2D u_texture;\n" + "void main()                                  \n"
        + "{                                            \n" + "  gl_FragColor = v_color * texture2D(u_texture, v_texCoords);\n"
        + "}";

    shader = new ShaderProgram(vertexShader, fragmentShader);
    if (shader.isCompiled() == false) {
        Gdx.app.log("ShaderTest", shader.getLog());
        Gdx.app.exit();
    }

    mesh = new Mesh(true, 4, 6, VertexAttribute.Position(), VertexAttribute.ColorUnpacked(), VertexAttribute.TexCoords(0));
    mesh.setVertices(new float[] {-0.5f, -0.5f, 0, 1, 1, 1, 1, 0, 1, 0.5f, -0.5f, 0, 1, 1, 1, 1, 1, 1, 0.5f, 0.5f, 0, 1, 1, 1,
        1, 1, 0, -0.5f, 0.5f, 0, 1, 1, 1, 1, 0, 0});
    mesh.setIndices(new short[] {0, 1, 2, 2, 3, 0});
    texture = new Texture(Gdx.files.internal("data/bobrgb888-32x32.png"));
}

@Override
public void create () {
    mesh = new Mesh(true, 3, 0, new VertexAttribute(Usage.Position, 3, "a_Position"), new VertexAttribute(Usage.ColorPacked, 4,
        "a_Color"), new VertexAttribute(Usage.TextureCoordinates, 2, "a_texCoords"));
    float c1 = Color.toFloatBits(255, 0, 0, 255);
    float c2 = Color.toFloatBits(255, 0, 0, 255);
    float c3 = Color.toFloatBits(0, 0, 255, 255);

    mesh.setVertices(new float[] {-0.5f, -0.5f, 0, c1, 0, 0, 0.5f, -0.5f, 0, c2, 1, 0, 0, 0.5f, 0, c3, 0.5f, 1});

    stencilMesh = new Mesh(true, 3, 0, new VertexAttribute(Usage.Position, 3, "a_Position"), new VertexAttribute(
        Usage.ColorPacked, 4, "a_Color"), new VertexAttribute(Usage.TextureCoordinates, 2, "a_texCoords"));
    stencilMesh.setVertices(new float[] {-0.5f, 0.5f, 0, c1, 0, 0, 0.5f, 0.5f, 0, c2, 1, 0, 0, -0.5f, 0, c3, 0.5f, 1});

    texture = new Texture(Gdx.files.internal("data/badlogic.jpg"));

    spriteBatch = new SpriteBatch();
    frameBuffer = new FrameBuffer(Format.RGB565, 128, 128, false);
    stencilFrameBuffer = new FrameBuffer(Format.RGB565, 128, 128, false, true);
    createShader(Gdx.graphics);
}

private void init(String tex0, float w, float h) {
    setTexture0(tex0);

    // Init comparator
    comp = new DistToCameraComparator<IRenderable>();
    // Init vertices
    float[] vertices = new float[20];
    fillVertices(vertices, w, h);

    // We wont need indices if we use GL_TRIANGLE_FAN to draw our quad
    // TRIANGLE_FAN will draw the verts in this order: 0, 1, 2; 0, 2, 3
    mesh = new Mesh(VertexDataType.VertexArray, true, 4, 6, new VertexAttribute(Usage.Position, 2, ShaderProgram.POSITION_ATTRIBUTE), new VertexAttribute(Usage.ColorPacked, 4, ShaderProgram.COLOR_ATTRIBUTE), new VertexAttribute(Usage.TextureCoordinates, 2, ShaderProgram.TEXCOORD_ATTRIBUTE + "0"));

    mesh.setVertices(vertices, 0, vertices.length);
    mesh.getIndicesBuffer().position(0);
    mesh.getIndicesBuffer().limit(6);

    short[] indices = new short[] { 0, 1, 2, 0, 2, 3 };
    mesh.setIndices(indices);

    quaternion = new Quaternion();
    aux = new Vector3();

}

@Override
protected void initVertices() {
    meshes = new MeshData[2];
    maxVertices = MAX_VERTICES;

    // ORIGINAL LINES
    curr = new MeshData();
    meshes[0] = curr;

    VertexAttribute[] attribs = buildVertexAttributes();
    curr.mesh = new Mesh(false, maxVertices, 0, attribs);

    curr.vertices = new float[maxVertices * (curr.mesh.getVertexAttributes().vertexSize / 4)];
    curr.vertexSize = curr.mesh.getVertexAttributes().vertexSize / 4;
    curr.colorOffset = curr.mesh.getVertexAttribute(Usage.ColorPacked) != null ? curr.mesh.getVertexAttribute(Usage.ColorPacked).offset / 4 : 0;
}

private void initVertices(int index) {
    if (meshes[index] == null) {
        currext = new MeshDataExt();
        meshes[index] = currext;
        curr = currext;

        maxVertices = MAX_VERTICES;
        currext.maxIndices = maxVertices + maxVertices / 2;

        VertexAttribute[] attribs = buildVertexAttributes();
        currext.mesh = new Mesh(Mesh.VertexDataType.VertexArray, false, maxVertices, currext.maxIndices, attribs);

        currext.indices = new short[currext.maxIndices];
        currext.vertexSize = currext.mesh.getVertexAttributes().vertexSize / 4;
        currext.vertices = new float[maxVertices * currext.vertexSize];

        currext.colorOffset = currext.mesh.getVertexAttribute(Usage.ColorPacked) != null ? currext.mesh.getVertexAttribute(Usage.ColorPacked).offset / 4 : 0;
        currext.uvOffset = currext.mesh.getVertexAttribute(Usage.TextureCoordinates) != null ? currext.mesh.getVertexAttribute(Usage.TextureCoordinates).offset / 4 : 0;
    } else {
        currext = (MeshDataExt) meshes[index];
        curr = currext;
    }
}

@Override
protected void initVertices() {
    meshes = new MeshData[1];
    curr = new MeshData();
    meshes[0] = curr;

    aux = new Vector3();

    /** Init renderer **/
    maxVertices = 3000000;

    VertexAttribute[] attribs = buildVertexAttributes();
    curr.mesh = new Mesh(false, maxVertices, 0, attribs);

    curr.vertices = new float[maxVertices * (curr.mesh.getVertexAttributes().vertexSize / 4)];
    curr.vertexSize = curr.mesh.getVertexAttributes().vertexSize / 4;
    curr.colorOffset = curr.mesh.getVertexAttribute(Usage.ColorPacked) != null ? curr.mesh.getVertexAttribute(Usage.ColorPacked).offset / 4 : 0;
    pmOffset = curr.mesh.getVertexAttribute(Usage.Tangent) != null ? curr.mesh.getVertexAttribute(Usage.Tangent).offset / 4 : 0;
    sizeOffset = curr.mesh.getVertexAttribute(Usage.Generic) != null ? curr.mesh.getVertexAttribute(Usage.Generic).offset / 4 : 0;
}

private void init(float w, float h) {
    // Init comparator
    comp = new DistToCameraComparator<IRenderable>();
    // Init vertices
    float[] vertices = new float[20];
    fillVertices(vertices, w, h);

    // We wont need indices if we use GL_TRIANGLE_FAN to draw our quad
    // TRIANGLE_FAN will draw the verts in this order: 0, 1, 2; 0, 2, 3
    mesh = new Mesh(VertexDataType.VertexArray, true, 4, 6, new VertexAttribute(Usage.Position, 2, ShaderProgram.POSITION_ATTRIBUTE), new VertexAttribute(Usage.ColorPacked, 4, ShaderProgram.COLOR_ATTRIBUTE), new VertexAttribute(Usage.TextureCoordinates, 2, ShaderProgram.TEXCOORD_ATTRIBUTE + "0"));

    mesh.setVertices(vertices, 0, vertices.length);
    mesh.getIndicesBuffer().position(0);
    mesh.getIndicesBuffer().limit(6);

    short[] indices = new short[] { 0, 1, 2, 0, 2, 3 };
    mesh.setIndices(indices);

    quaternion = new Quaternion();
    aux = new Vector3();

}

@Override
protected void initVertices() {
    /** STARS **/
    meshes = new MeshData[1];
    curr = new MeshData();
    meshes[0] = curr;

    aux1 = new Vector3();

    maxVertices = 10000000;

    VertexAttribute[] attribs = buildVertexAttributes();
    curr.mesh = new Mesh(false, maxVertices, 0, attribs);

    curr.vertices = new float[maxVertices * (curr.mesh.getVertexAttributes().vertexSize / 4)];
    curr.vertexSize = curr.mesh.getVertexAttributes().vertexSize / 4;
    curr.colorOffset = curr.mesh.getVertexAttribute(Usage.ColorPacked) != null ? curr.mesh.getVertexAttribute(Usage.ColorPacked).offset / 4 : 0;
    pmOffset = curr.mesh.getVertexAttribute(Usage.Tangent) != null ? curr.mesh.getVertexAttribute(Usage.Tangent).offset / 4 : 0;
    additionalOffset = curr.mesh.getVertexAttribute(Usage.Generic) != null ? curr.mesh.getVertexAttribute(Usage.Generic).offset / 4 : 0;

}

/**
 * Billboard quad render, for planets and stars.
 */
@Override
public void render(ShaderProgram shader, float alpha, Mesh mesh, ICamera camera) {
    compalpha = alpha;

    float size = getFuzzyRenderSize(camera);

    Vector3 aux = aux3f1.get();
    shader.setUniformf("u_pos", transform.getTranslationf(aux));
    shader.setUniformf("u_size", size);

    shader.setUniformf("u_color", ccPale[0], ccPale[1], ccPale[2], alpha * opacity);
    shader.setUniformf("u_inner_rad", getInnerRad());
    shader.setUniformf("u_distance", (float) distToCamera);
    shader.setUniformf("u_apparent_angle", (float) viewAngleApparent);
    shader.setUniformf("u_thpoint", (float) THRESHOLD_POINT() * camera.getFovFactor());

    // Whether light scattering is enabled or not
    shader.setUniformi("u_lightScattering", (this instanceof Star && PostProcessorFactory.instance.getPostProcessor().isLightScatterEnabled()) ? 1 : 0);

    shader.setUniformf("u_radius", (float) getRadius());

    // Sprite.render
    mesh.render(shader, GL20.GL_TRIANGLES, 0, 6);
}

/**
 * Quad rendering
 */
@Override
public void render(ShaderProgram shader, float alpha, Mesh mesh, ICamera camera) {
    double thpointTimesFovfactor = GlobalConf.scene.STAR_THRESHOLD_POINT * camera.getFovFactor() * .5e-1f;
    double thupOverFovfactor = Constants.THRESHOLD_UP / camera.getFovFactor();
    double thdownOverFovfactor = Constants.THRESHOLD_DOWN / camera.getFovFactor();
    double innerRad = 0.006 + GlobalConf.scene.STAR_POINT_SIZE * 0.008;
    float alph = alpha * this.opacity;

    /** GENERAL UNIFORMS **/
    shader.setUniformf("u_thpoint", (float) GlobalConf.scene.STAR_THRESHOLD_POINT * camera.getFovFactor());
    // Light glow always disabled with star groups
    shader.setUniformi("u_lightScattering", 0);
    shader.setUniformf("u_inner_rad", (float) innerRad);

    /** RENDER ACTUAL STARS **/
    boolean focusRendered = false;
    for (int i = 0; i < N_CLOSEUP_STARS; i++) {
        renderCloseupStar(i, active[i], camera, shader, mesh, thpointTimesFovfactor, thupOverFovfactor, thdownOverFovfactor, alph);
        focusRendered = focusRendered || active[i] == focusIndex;
    }
    if (focus != null && !focusRendered) {
        renderCloseupStar(1, focusIndex, camera, shader, mesh, thpointTimesFovfactor, thupOverFovfactor, thdownOverFovfactor, alph);
    }

}

/**
 * Billboard quad rendering
 */
@Override
public void render(ShaderProgram shader, float alpha, Mesh mesh, ICamera camera) {
    // Bind texture
    if (clusterTex != null) {
        clusterTex.bind(0);
        shader.setUniformi("u_texture0", 0);
    }

    float fa = 1 - fadeAlpha;

    Vector3 aux = aux3f1.get();
    shader.setUniformf("u_pos", transform.getTranslationf(aux));
    shader.setUniformf("u_size", size);
    shader.setUniformf("u_color", col[0] * fa, col[1] * fa, col[2] * fa, col[3] * alpha * opacity * 4f);
    // Sprite.render
    mesh.render(shader, GL20.GL_TRIANGLES, 0, 6);
}

/**
 * Billboard quad rendering
 */
@Override
public void render(ShaderProgram shader, float alpha, Mesh mesh, ICamera camera) {
    compalpha = alpha;

    float size = getFuzzyRenderSize(camera);

    Vector3 aux = aux3f1.get();
    shader.setUniformf("u_pos", transform.getTranslationf(aux));
    shader.setUniformf("u_size", size);

    shader.setUniformf("u_color", cc[0], cc[1], cc[2], alpha * (1 - fadeOpacity));
    shader.setUniformf("u_inner_rad", getInnerRad());
    shader.setUniformf("u_distance", (float) distToCamera);
    shader.setUniformf("u_apparent_angle", (float) viewAngleApparent);
    shader.setUniformf("u_thpoint", (float) THRESHOLD_POINT() * camera.getFovFactor());

    // Whether light scattering is enabled or not
    shader.setUniformi("u_lightScattering", 0);

    shader.setUniformf("u_radius", (float) getRadius());

    // Sprite.render
    mesh.render(shader, GL20.GL_TRIANGLES, 0, 6);
}

/** End building the mesh and returns the mesh */
public Mesh end() {
    if (this.attributes == null)
        throw new RuntimeException("Call begin() first");
    endpart();

    final Mesh mesh = new Mesh(true, vertices.size / stride, indices.size, attributes);
    mesh.setVertices(vertices.items, 0, vertices.size);
    mesh.setIndices(indices.items, 0, indices.size);

    for (MeshPart p : parts)
        p.mesh = mesh;
    parts.clear();

    attributes = null;
    vertices.clear();
    indices.clear();

    return mesh;
}

public ImmediateRenderer(int maxVertices, boolean hasNormals, boolean hasColors, int numTexCoords, ShaderProgram shader) {
    this.maxVertices = maxVertices;
    this.numTexCoords = numTexCoords;
    this.shader = shader;

    VertexAttribute[] attribs = buildVertexAttributes(hasNormals, hasColors, numTexCoords);
    mesh = new Mesh(false, maxVertices, 0, attribs);

    vertices = new float[maxVertices * (mesh.getVertexAttributes().vertexSize / 4)];
    vertexSize = mesh.getVertexAttributes().vertexSize / 4;
    normalOffset = mesh.getVertexAttribute(Usage.Normal) != null ? mesh.getVertexAttribute(Usage.Normal).offset / 4 : 0;
    colorOffset = mesh.getVertexAttribute(Usage.ColorPacked) != null ? mesh.getVertexAttribute(Usage.ColorPacked).offset / 4 : 0;
    texCoordOffset = mesh.getVertexAttribute(Usage.TextureCoordinates) != null ? mesh.getVertexAttribute(Usage.TextureCoordinates).offset / 4 : 0;

    shaderUniformNames = new String[numTexCoords];
    for (int i = 0; i < numTexCoords; i++) {
        shaderUniformNames[i] = "u_sampler" + i;
    }
}

@Deprecated
public static Model createFromMesh(final Mesh mesh, int indexOffset, int vertexCount, int primitiveType, final Material material) {
    Model result = new Model();
    MeshPart meshPart = new MeshPart();
    meshPart.id = "part1";
    meshPart.offset = indexOffset;
    meshPart.size = vertexCount;
    meshPart.primitiveType = primitiveType;
    meshPart.mesh = mesh;

    NodePart partMaterial = new NodePart();
    partMaterial.material = material;
    partMaterial.meshPart = meshPart;
    Node node = new Node();
    node.id = "node1";
    node.parts.add(partMaterial);

    result.meshes.add(mesh);
    result.materials.add(material);
    result.nodes.add(node);
    result.meshParts.add(meshPart);
    result.manageDisposable(mesh);
    return result;
}

public Renderer20 (int maxVertices, boolean hasNormals, boolean hasColors, int numTexCoords, ShaderProgram shader) {
    this.maxVertices = maxVertices;
    this.numTexCoords = numTexCoords;
    this.shader = shader;

    VertexAttribute[] attribs = buildVertexAttributes(hasNormals, hasColors, numTexCoords);
    mesh = new Mesh(false, maxVertices, 0, attribs);

    vertices = new float[maxVertices * (mesh.getVertexAttributes().vertexSize / 4)];
    vertexSize = mesh.getVertexAttributes().vertexSize / 4;
    normalOffset = mesh.getVertexAttribute(Usage.Normal) != null ? mesh.getVertexAttribute(Usage.Normal).offset / 4 : 0;
    colorOffset = mesh.getVertexAttribute(Usage.ColorPacked) != null ? mesh.getVertexAttribute(Usage.ColorPacked).offset / 4
        : 0;
    texCoordOffset = mesh.getVertexAttribute(Usage.TextureCoordinates) != null ? mesh
        .getVertexAttribute(Usage.TextureCoordinates).offset / 4 : 0;
}