Code example for GL10

Methods: glFrustumf, glLoadIdentity, glMatrixMode, glViewport

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        mTriangle.draw(gl);
    } 
 
    public void onSurfaceChanged(GL10 gl, int w, int h) {
        gl.glViewport(0, 0, w, h);
 
        /* 
        * Set our projection matrix. This doesn't have to be done 
        * each time we draw, but usually a new projection needs to 
        * be set when the viewport is resized. 
        */ 
 
        float ratio = (float) w / h;
        gl.glMatrixMode(GL10.GL_PROJECTION);
        gl.glLoadIdentity();
        gl.glFrustumf(-ratio, ratio, -1, 1, 3, 7);
 
    } 
 
    private Context mContext;
    private Triangle mTriangle;
    private int mTextureID;