public class Projections extends JPanel implements GLEventListener, KeyListener {

    static GLAutoDrawable glDraw;

    double ctrlpoints[] = {
            -1.5, -1.5, 4.0, -0.5, -1.5, 2.0,
                0.5, -1.5, -1.0, 1.5, -1.5, 2.0,
            -1.5, -0.5, 1.0, -0.5, -0.5, 3.0,
                0.5, -0.5, 0.0, 1.5, -0.5, -1.0,
            -1.5, 0.5, 4.0, -0.5, 0.5, 0.0,
                0.5, 0.5, 3.0, 1.5, 0.5, 4.0,
            -1.5, 1.5, -2.0, -0.5, 1.5, -2.0,
                0.5, 1.5, 0.0, 1.5, 1.5, -1.0
        };

    @Override
    public void display(GLAutoDrawable gLDrawable) {
        GL gl = gLDrawable.getGL();
        gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
        gl.glColor3d(1.0, 0.0, 0.0);

        gl.glMapGrid2d(1/60,0.0,1.0,1/60,0.0,1.0);
        gl.glEvalMesh2(GL.GL_LINE, 0, 1/60, 0, 1/60);

    }

    @Override
    public void displayChanged(GLAutoDrawable arg0, boolean arg1, boolean arg2) {
        // TODO Auto-generated method stub

    }

    @Override
    public void init(GLAutoDrawable gLDrawable) {
        glDraw = gLDrawable;
        GL gl = gLDrawable.getGL();
        gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
        gl.glMap2d(GL.GL_MAP2_VERTEX_3, 0, 1, 3, 4,
                   0, 1, 12, 4, ctrlpoints,0);

        gl.glEnable(GL.GL_MAP2_VERTEX_3);


    }

    @Override
    public void reshape(GLAutoDrawable drawable, int x, int y, int width,
            int height) {
        GL gl = drawable.getGL();
        GLU glu = new GLU();
        gl.glViewport(0, 0, width, height);
        gl.glMatrixMode(GL.GL_PROJECTION);
        gl.glLoadIdentity();
        if (width <= height)
            gl.glOrtho(-5.0, 5.0, -5.0*(double)height/(double)width,
                5.0*(double)height/(double)width, -5.0, 5.0);
        else
            gl.glOrtho(-5.0*(double)width/(double)height,
                5.0*(double)width/(double)height, -5.0, 5.0, -5.0, 5.0);

        gl.glMatrixMode(GL.GL_MODELVIEW);
        gl.glLoadIdentity();
    }