Recently I've been asked about how to make a Tetra-Pod with Dynamo. After I created one, I felt it's a quite simple but good example of using geometrical construction in Dynamo, so I'm posting about it.
Basically, the geometry of a Tetra-Pod is from a regular tetrahedron as it's name. So if a regular tetrahedron could be created, making a Tetra-Pod wouldn't be very difficult.
Actually, I've already posted about creating five types of regular polyhedrons a few years ago.(You can read the post here) I've used math to find each necessary angles at the post. This time, I didn't use any math calculations to find angles. Only pure geometrical methods were used instead. Geometrical constructions are useful especially when you want to avoid errors of float numbers.
1. Define regular triangle for bottom (in geometrical method)
Four lines which connect between center point and each apexes can be found. They are four legs of a Tetra-Pod.
Now, a fine accurate Tetra-Pod geometry is generated without any complicated math.