this is not a question about a project but rather a discussion (If anybody is interested) about cutting slices of 4D objects in 3D space.
I saw the other day this video:
Where the creators of the game “miegakure” created 4D objects (It’s easy to calculate in 4D eucledian space apparently- just add one coordinate) and then presented on the screen only 3d slices of those shapes.
I bet this can be done in GH, and once I find some time I’ll give it a try, but I’m just asking if anybody else has tried something like this…
You don’t have too. Rhino already has 4d objects (excluding time) :
If you follow the video, you could argue that a 3d nurbscurve/surface which is rational/weighted is actually a curve of higher dimension and the factor of weighting just looks 3d to us because we cannot imagine a higher dimension.
no pretty icons ha?
Anyway, Grasshopper never stops amazing me!!!
I have to accellerate my coding lessons’ pace!
Well, yes if you’re willing to do a lot of coding up front. None of the data types in RhinoCommon or GH are designed with more than 3 dimensions in mind. Even
Point4d isn’t really a four-dimensional entity, the ‘d’ stands for ‘double-precision’, not ‘dimension’. It’s actually a three-dimensional homogeneous coordinate and should be considered as a scaling factor for the first three values (x, y, z).
In addition to 4-d points, vectors and planes (which are all reasonably straightforward), you’ll also have to create a 4-d mesh type (4-d tetrahedrons instead of 3-d triangles). This does not strike me as particularly straightforward. Then the intersection code for tetrahedrons and planes yielding a three-dimensional triangle mesh… phew, better you than me.