New to Grasshopper and Kangaroo and having trouble finding a solution, though I’m thinking I can’t be too far off.
I’m trying to create catenary columns that extend to a common height, as seen in this first image:
The following axonometric, shows a worm’s-eye view of what I’m referring to, as these are columns, and not simply extruded arches.
My initial attempts utilizing tutorials on youtube have involved creating anchor points around the edge of roof. This first attempt, in section, simply offset anchor points for the columns. Whilst these appear to be catenary arches, the peaks of the arches are extremely low.
With my second attempt, I tried to ‘button’ to the tops of the lower arches to the correct elevation with anchor-points at their pinnacle. Evidently, however, it didn’t work, and I was left with these bizarre forms.
My most recent attempt, is getting closer but not quite there. I isolated the tributary area of each column, as shown below, and focused on one column at a time. Anchoring the edges of its span, I once again anchored the column at a lower elevation. I figured that halfway between columns is where the highest point would need to be.
While this got me much closer, this section shows that these aren’t the catenary arches that I was looking for. The larger spans are nearly horizontal as they rise, and the more narrow spans meet at a point as opposed to a more rounded curve as seen in the first image.
If anyone could provide some feedback or point me in the right direction, it would be very much appreciated! This is my first time using grasshopper and kangaroo, so advice might have to be in layman’s terms.
Here’s what I’m working with in Grasshopper