在jogl中使用VAO应用颜色

时间:2015-05-08 06:50:17

标签: colors rendering jogl worldwind vao

我试图在jogl中为我的多边形着色。我已将顶点存储在数组中,三角形顺序的索引数组和颜色数组。代码如下,但我面临的问题是三角形是白色,而不是颜色缓冲区的颜色。

    float f[] = {1000,2000,-4000,-2000,-2000,-4000,2000,-2000,-4000,1000,-4000,-4000};
    FloatBuffer buffer = GLBuffers.newDirectFloatBuffer(12);
    this.coordCount = 12;
    buffer.put(f);
    buffer.rewind();

    int indx[] = {0,1,2,1,3,2};
    IntBuffer indxBuffer = GLBuffers.newDirectIntBuffer(6); //Total number of vertices
    this.indexCount = 6;
    indxBuffer.put(indx);
    indxBuffer.rewind();

    float color[] = {1,0,1,0,0,0,0,0,0,1,0,0};
    FloatBuffer colorBuffer = GLBuffers.newDirectFloatBuffer(12);
    colorBuffer.put(color);
    colorBuffer.rewind();

    gl.glDisable(GL.GL_TEXTURE_2D);
    gl.glEnableClientState(GLPointerFunc.GL_COLOR_ARRAY);
    gl.glEnableClientState(GLPointerFunc.GL_VERTEX_ARRAY);
    gl.glFrontFace(GL.GL_CCW);

    gl.glVertexPointer(3, GL.GL_FLOAT, 0, buffer);
    gl.glColorPointer(3, GL.GL_FLOAT, 0, colorBuffer);

    gl.glDrawElements(GL.GL_TRIANGLES, this.indexCount, GL.GL_UNSIGNED_INT, indxBuffer);

    gl.glDisableClientState(GLPointerFunc.GL_COLOR_ARRAY);
    gl.glDisableClientState(GLPointerFunc.GL_VERTEX_ARRAY);
    gl.glEnable(GL.GL_TEXTURE_2D);

我在NASA世界风球上做这个渲染。但我不认为这会导致任何问题。有人能帮我解决问题吗?我被困在这一段时间了。

谢谢,

1 个答案:

答案 0 :(得分:0)

得到解决方案,只需启用颜色和材料。

   gl.glEnable(GL2.GL_COLOR_MATERIAL);
   gl.glColorMaterial(GL2.GL_FRONT_AND_BACK, GL2.GL_DIFFUSE);