Rotating Sierpinski 3D Tetrahedron (Also done with GL thanks to
Gigatron)
lazarus / 39-Graphics

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Boleeman · 2025-08-06 08:56

A rotating Sierpinski Tetrahedron

Used Tbgrabmp. Now also done in GL (thanks Gigatron)


It slows right down at level 4

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Gigatron · 2025-08-06 16:41

Hi

I tried to do a conversion with the glLine command, it's good for
level 4 and 5 no more. I will send you the source code as soon as I
have finished the new version of the glCanvas library.

Regards

** Edit ***

@Boleeman , here is the project1.zip with the GL version;

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Boleeman · 2025-08-09 01:46

Thanks Gigatron for the GL upgrade. Much appreciated.

The rotation is much smoother.

Even got level 6 to work reasonably well by lowering the alpha to
about 70 and line width to 0.5.
At that level and with those settings it takes on a fine glass
appearance.

I have got to use GL more often for animations, as it seems to be much
smoother (buffered). I have seen some excellent WebGL JavaScript
animations, also using shaders so it would be nice to learn to do it
with Lazarus.

I was also curious about Guva's RayLib animation codes, but as I am
running out of HDD space of my old laptop, I will need to install that
on a newer laptop.

Gigatron, I noticed that when I compile your code I get a much smaller
exe file (just under 2 Mb) whereas my usual exe size is just over 3Mb.
Not sure how you did that?

Gigatron, thanks for doing that conversion. I will learn from that, as
my GL knowledge it not that great.
I did some Koch GL curve ages ago and kinda struggled to get things
working. I got it in the end though.