想要旋转我的立方体。我怎么能这样做呢？

Question

我想旋转我的立方体，并添加4个按钮，以加快速度，向下移动，向上移动和向下移动。你能帮我一下吗？颜色是黄色的。cube.cube下的4个按钮应围绕y轴旋转。

public class MyGLRenderer implements Renderer {
Context context; 


Cube cube;

public MyGLRenderer(Context context) {

    this.context = context;


    cube = new Cube();
}

// Call back when the surface is first created or re-created
@Override
public void onSurfaceCreated(GL10 gl, EGLConfig config) {
    // clear-value for color and depth, enabling depth-test, etc.
    gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f); // Set color's clear-value to black
}

// Call back after onSurfaceCreated() or whenever the window's size changes
@Override
public void onSurfaceChanged(GL10 gl, int width, int height) {
    if (height == 0)
        height = 1;
    float aspect = (float) width / height;

    // Set the viewport (display area) to cover the entire window
    gl.glViewport(0, 0, width, height);

    // Select projection matrix: projection matrix or model-view matrix
    gl.glMatrixMode(GL10.GL_PROJECTION);
    // Reset projection matrix
    gl.glLoadIdentity();

    GLU.gluPerspective(gl, 45, aspect, 0.1f, 100.f);

    // Select model-view matrix
    gl.glMatrixMode(GL10.GL_MODELVIEW);
    // Reset
    gl.glLoadIdentity();

}

// Call back to draw the current frame.
@Override
public void onDrawFrame(GL10 gl) {
    // Clear color and depth buffers using clear-value set earlier
    gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);

    // Reset model-view matrix
    gl.glLoadIdentity();
    // Translate into the screen
    gl.glTranslatef(0.0f, 0.0f, -5.0f); 


    // Draw cube
    cube.draw(gl);
}

}

Answer 1

这就是你要找的：https://www.opengl.org/sdk/docs/man2/xhtml/glRotate.xml，你必须把它放在glTranslatef前面