如何在android中绘制球体

    // 球体的顶点位置

    0.0f, 0.0f, 0.0f,

    0.0f, 0.0f, -30.0f,

    0.0f, 0.0f, 0.0f,

    0.0f, 0.0f, 30.0f

    0.5f, 0.5f, 0.5f,

    0.5f, 0.5f, 0.5f,

    0.5f, 0.5f, 0.5f,

    0.5f, 0.5f, 0.5f

glSurfaceView = new GLSurfaceView(this);

glSurfaceView.setEGLContextClientVersion(2);

glSurfaceView.setRenderer(new BallRenderer(this));

setContentView(glSurfaceView);

private Context context;

public BallRenderer(Context context) {

    this.context = context;

}

@Override

public void onSurfaceCreated(GL10 gl, EGLConfig config) {

    // 初始化着色器

    BallShader.init(gl);

}

@Override

public void onSurfaceChanged(GL10 gl, int width, int height) {

    // 适应屏幕大小

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

}

@Override

public void onDrawFrame(GL10 gl) {

    // 绘制球体

    BallShader.draw(gl, ballVertices, ballColors);

}

    + "attribute vec4 a_color; \n"

    + "varying vec4 v_color; \n"

    + "void main() { \n"

    + "   gl_Position = a_position; \n"

    + "   v_color = a_color; \n"

    + "}\n";

    1.0f, 0.0f, 0.0f,

    1.0f, 0.0f, 0.0f,

    1.0f, 0.0f, 0.0f,

    1.0f, 0.0f, 0.0f

    0.0f, 0.0f, 0.0f,

    0.0f, 0.0f, -30.0f,

    0.0f, 0.0f, 0.0f,

    0.0f, 0.0f, 30.0f

// 创建一个着色器

int[] shader = new int[1];

glGenVertexArrays(1, shader, 0);

glGenBuffers(1, ballVertexBuffer, 0);

glGenTextures(1, ballTexture, 0);

// 将着色器编译成程序可用的代码

shader[0] = Shader.createFromAsset(context, BALL_SHADER, this);

// 将顶点数据复制到VBO中

glBindVertexArray(shader[0]);