Drawing Hermite curves in OpenGL

Question

How can I draw Hermite curves using OpenGL, are there any built in functions? I saw some examples on-line that show how to use evaluators to draw Bezier curves but could not fin

Answer 1

As Steven mentioned, you can convert a cubic Hermite curve to a cubic Bezier curve. It's actually quite simple.

A typical cubic Hermite curve is defined with two points and two vectors:

• P0 -- start point
• V0 -- derivative at P0
• P1 -- end point
• V1 -- derivative at P1

The conversion to a cubic Bezier is simply:

B0 = P0
B1 = P0 + V0/3
B2 = P1 - V1/3
B3 = P1

You can then draw your Bezier curve using and evaluator or any other way you wish.