Fractal mountains using Sierpinski gasket in OpenGL

Question

I\'m reading a book on OpenGL, \"Interactive Computer Graphics\" by Edward Angel. In it, he asks you to modify a Sierpinski gasket algorithm to yield fractal mountains. To do so

Answer 1

By "perturb" he likely means adding a bit of noise to the new midpoint.

Answer 2

Here's a thought: "perturb" the midpoint by displacing it in the direction perpendicular to the side and form a small hat-shaped segment.

Go from this:

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to this:

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