How to draw a 3D donut chart in OpenGL?

I would like to draw a chart in OpenGL similar to the do开发者_如何学JAVAnut graph at the bottom-right of this example.

I have experience with drawing 2D charts such as the main chart in the example but what confuses me about the one I want to draw is the correct type of primitive to use when drawing the 3D chart. I have considered using GL_QUAD_STRIP and GL_POLYGON but neither seem quite right for the task. Where should I begin?

I will be using JOGL with Java to draw the chart, if that helps at all. Also, I don't necessarily need to extrude certain slices of the chart as shown in the example.

Update: I do need to use OpenGL for drawing even if there are easier alteratives. This is part of my research for an assignment that requires OpenGL rendering.

_{(source: ofmichaelanderson.com)}

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Just use GL_TRIANGLE_STRIP, there will be four strips per segment of the donut (or torus): top, bottom, outer and inner. If you decide to support extrusion, you will of course need "endcaps" for each segment, too.

You can probably find tutorials by searching for torus rendering.

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Are there any specific reasons why you want to use OpenGL to draw these charts?

I've been hearing pretty good things about JFreechart.