Examples of com.badlogic.gdx.graphics.VertexAttribute

com.badlogic.gdx.graphics.VertexAttribute
A single vertex attribute defined by its {@link Usage}, its number of components and its shader alias. The Usage is needed for the fixed function pipeline of OpenGL ES 1.x. Generic attributes are not supported in the fixed function pipeline. The number of components defines how many components the attribute has. The alias defines to which shader attribute this attribute should bind. The alias is used by a {@link Mesh} when drawing with a {@link ShaderProgram}. The alias can be changed at any time. @author mzechner

    int textureUnit = 0;
    int numAttributes = attributes.size();


    for (int i = 0; i < numAttributes; i++) {


      VertexAttribute attribute = attributes.get(i);
      switch (attribute.usage) {
      case Usage.Position:
        break; // no-op, we always need a position bound in gles
      case Usage.Color:
      case Usage.ColorPacked:

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    final GL20 gl = Gdx.gl20;
    final int numAttributes = attributes.size();
    byteBuffer.limit(buffer.limit() * 4);
    if (locations == null) {
      for (int i = 0; i < numAttributes; i++) {
        final VertexAttribute attribute = attributes.get(i);
        final int location = shader.getAttributeLocation(attribute.alias);
        if (location < 0)
          continue;
        shader.enableVertexAttribute(location);
        
        byteBuffer.position(attribute.offset);
        if (attribute.usage == Usage.ColorPacked)
          shader.setVertexAttribute(location, attribute.numComponents, GL20.GL_UNSIGNED_BYTE, true, 
            attributes.vertexSize, byteBuffer);
        else
          shader.setVertexAttribute(location, attribute.numComponents, GL20.GL_FLOAT, false, 
            attributes.vertexSize, byteBuffer);
      }
    } else {
      for (int i = 0; i < numAttributes; i++) {
        final VertexAttribute attribute = attributes.get(i);
        final int location = locations[i];
        if (location < 0)
          continue;
        shader.enableVertexAttribute(location);

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    }


    final int numAttributes = attributes.size();
    if (locations == null) {
      for (int i = 0; i < numAttributes; i++) {
        final VertexAttribute attribute = attributes.get(i);
        final int location = shader.getAttributeLocation(attribute.alias);
        if (location < 0)
          continue;
        shader.enableVertexAttribute(location);
  
        if (attribute.usage == Usage.ColorPacked)
          shader.setVertexAttribute(location, attribute.numComponents, GL20.GL_UNSIGNED_BYTE, true, attributes.vertexSize,
            attribute.offset);
        else
          shader.setVertexAttribute(location, attribute.numComponents, GL20.GL_FLOAT, false, attributes.vertexSize,
            attribute.offset);
      }
    } else {
      for (int i = 0; i < numAttributes; i++) {
        final VertexAttribute attribute = attributes.get(i);
        final int location = locations[i];
        if (location < 0)
          continue;
        shader.enableVertexAttribute(location);

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  /** @param usage bitwise mask of the {@link com.badlogic.gdx.graphics.VertexAttributes.Usage}, only Position, Color, Normal and
   *           TextureCoordinates is supported. */
  public static VertexAttributes createAttributes (long usage) {
    final Array<VertexAttribute> attrs = new Array<VertexAttribute>();
    if ((usage & Usage.Position) == Usage.Position)
      attrs.add(new VertexAttribute(Usage.Position, 3, ShaderProgram.POSITION_ATTRIBUTE));
    if ((usage & Usage.Color) == Usage.Color) attrs.add(new VertexAttribute(Usage.Color, 4, ShaderProgram.COLOR_ATTRIBUTE));
    if ((usage & Usage.ColorPacked) == Usage.ColorPacked)
      attrs.add(new VertexAttribute(Usage.ColorPacked, 4, ShaderProgram.COLOR_ATTRIBUTE));
    if ((usage & Usage.Normal) == Usage.Normal)
      attrs.add(new VertexAttribute(Usage.Normal, 3, ShaderProgram.NORMAL_ATTRIBUTE));
    if ((usage & Usage.TextureCoordinates) == Usage.TextureCoordinates)
      attrs.add(new VertexAttribute(Usage.TextureCoordinates, 2, ShaderProgram.TEXCOORD_ATTRIBUTE + "0"));
    final VertexAttribute attributes[] = new VertexAttribute[attrs.size];
    for (int i = 0; i < attributes.length; i++)
      attributes[i] = attrs.get(i);
    return new VertexAttributes(attributes);
  }

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    this.vindex = 0;
    this.istart = 0;
    this.part = null;
    this.stride = attributes.vertexSize / 4;
    this.vertex = new float[stride];
    VertexAttribute a = attributes.findByUsage(Usage.Position);
    if (a == null) throw new GdxRuntimeException("Cannot build mesh without position attribute");
    posOffset = a.offset / 4;
    posSize = a.numComponents;
    a = attributes.findByUsage(Usage.Normal);
    norOffset = a == null ? -1 : a.offset / 4;

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  public SpriteCache (int size, ShaderProgram shader, boolean useIndices) {
    this.shader = shader;


    if (useIndices && size > 5460) throw new IllegalArgumentException("Can't have more than 5460 sprites per batch: " + size);


    mesh = new Mesh(true, size * (useIndices ? 4 : 6), useIndices ? size * 6 : 0, 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.setAutoBind(false);


    if (useIndices) {
      int length = size * 6;
      short[] indices = new short[length];

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    int textureUnit = 0;
    int numAttributes = attributes.size();


    for (int i = 0; i < numAttributes; i++) {
      VertexAttribute attribute = attributes.get(i);


      switch (attribute.usage) {
      case Usage.Position:
        gl.glEnableClientState(GL11.GL_VERTEX_ARRAY);
        gl.glVertexPointer(attribute.numComponents, GL10.GL_FLOAT, attributes.vertexSize, attribute.offset);

View Full Code Here

    }


    final int numAttributes = attributes.size();
    if (locations == null) {
      for (int i = 0; i < numAttributes; i++) {
        final VertexAttribute attribute = attributes.get(i);
        final int location = shader.getAttributeLocation(attribute.alias);
        if (location < 0)
          continue;
        shader.enableVertexAttribute(location);
  
        if (attribute.usage == Usage.ColorPacked)
          shader.setVertexAttribute(location, attribute.numComponents, GL20.GL_UNSIGNED_BYTE, true, attributes.vertexSize,
            attribute.offset);
        else
          shader.setVertexAttribute(location, attribute.numComponents, GL20.GL_FLOAT, false, attributes.vertexSize,
            attribute.offset);
      }
    } else {
      for (int i = 0; i < numAttributes; i++) {
        final VertexAttribute attribute = attributes.get(i);
        final int location = locations[i];
        if (location < 0)
          continue;
        shader.enableVertexAttribute(location);

View Full Code Here

    int textureUnit = 0;
    int numAttributes = attributes.size();


    for (int i = 0; i < numAttributes; i++) {


      VertexAttribute attribute = attributes.get(i);
      switch (attribute.usage) {
      case Usage.Position:
        break; // no-op, we also need a position bound in gles
      case Usage.Color:
      case Usage.ColorPacked:

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   * The buffers for the vertices and indices are shared amonst both. */
  public void set(final Mesh mesh, int offset, int count) {
    if ((count <= 0) || ((count % 3) != 0))
      throw new com.badlogic.gdx.utils.GdxRuntimeException("Mesh must be indexed and triangulated");


    VertexAttribute posAttr = mesh.getVertexAttribute(Usage.Position);
    
    if (posAttr == null)
      throw new com.badlogic.gdx.utils.GdxRuntimeException("Mesh doesn't have a position attribute");
    
    setVertices(mesh.getVerticesBuffer(), mesh.getVertexSize(), mesh.getNumVertices(), posAttr.offset);

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