Jean-Sébastien, Sorry that I sounded a bit desperate for quick answers, but I really appreciate the hint you've given me. I didn't think about using vectors, having the excuse that I haven't attended any Computer Graphics course. This project I'm participating in is from my Research Internship, and the software is only a small tool ina bigger picture.
Once again, thank you for your patience. Renan M Z Mendes
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