如何在opengl es 2.0中的2D游戏中设置深度范围？

因此，我目前正在为Android进行2D游戏项目，并且正在使用Opengl ES 2.0。我的深度缓冲区默认范围是0.0到1.0，但我想将其扩展到0.0-100.0。我尝试使用GLES20.glDepthRangef，但它似乎对我不起作用。Z值超出范围的图像：0.0-1.0不会显示在屏幕上。我想念什么吗？我将不胜感激！

private final float[] mtrxProjection = new float[16];
private final float[] mtrxView = new float[16];
private final float[] mtrxProjectionAndView = new float[16];

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

        //current width and height.
        swp = width;
        shp = height;

        // Redo the Viewport, making it fullscreen.
        GLES20.glViewport(0, 0, (int)swp, (int)shp);

        // Clear our matrices
        for(int i=0;i<16;i++)
        {
            mtrxProjection[i] = 0.0f;
            mtrxView[i] = 0.0f;
            mtrxProjectionAndView[i] = 0.0f;
        }

        // Setup our screen width and height for normal sprite translation.
        Matrix.orthoM(mtrxProjection, 0, 0f, swp, 0.0f, shp, 0, 100);

        // Depth testing
        GLES20.glEnable( GLES20.GL_DEPTH_TEST );
        GLES20.glDepthFunc( GLES20.GL_LEQUAL );
        GLES20.glDepthMask( true ); 
        GLES20.glDepthRangef(0,  100);

        // Set the camera position (View matrix)
        Matrix.setLookAtM(mtrxView, 0, 0f, 0f, 1f, 0f, 0f, 0f, 0f, 1.0f, 0.0f);

        // Calculate the projection and view transformation
        Matrix.multiplyMM(mtrxProjectionAndView, 0, mtrxProjection, 0, mtrxView, 0);
}

这是我的顶点着色器：

public static final String vs_Image =
        "uniform mat4 u_MVPMatrix;" + // u_MVPMatrix is the mtrxProjectionAndView calculated above
        "attribute vec4 a_position;" +
        "attribute vec2 a_texCoord;" +
        "varying vec2 v_texCoord;" +
        "void main() {" +
        "  gl_Position = u_MVPMatrix * a_position;" +
        "  v_texCoord = a_texCoord;" +
        "}";