Massing - problem with aligning patern

[Anonymous]

I'm working on a pattern-based structure. My model consists of two masses (one for he "wall" vertical portion of the structure and the other one for the funky, irregular "roof"/slanted portion). I'm applying patterns to my mass elements in order to simulate steel framing that's meant to be a sort of shade. I'm experiencing a lot of trouble with making the patterns on both parts match perfectly. I guess it' due to the fact that one of the surfaces is not flat, but I believe there must be some kind of solution!

I would like the pattern on the upper surface to look just like the one on the lower one and by that I mean having the exact same spacing in elevation view on each row and the irregularities to be just cut off (exactly like it happens with a fixed distance grid setting on the wall portion). However, despite using same exact properties i just won't work and the grid is getting deformed in elevation view no matter what I do.

You can see what I'm talking about by looking at attached picture (pattern on the left and how the surface I'm working on looks like on the right).

I tried using align option but it makes it look even worse (picture 2).

Any help would be greatly appreciated. I'm also attaching my file. Thank you.

[Alfredo_Medina · Accepted solution]

For the upper, slanted, portion, disable the grids, erase the pattern, draw reference planes at the desired places, and do the division again by intersection, disabling UV grids, selecting the reference planes.

[Anonymous]

Thank you very much, it seems to work just fine! I actually tried this before but didn't realize that the reference planes/lines have to go through the whole surface and tried drawing the pattern itself instead of rectangular grid that would later down the line get the pattern applied. Needles to say I was getting errors and dropped this method. Now I actually got it right, thank you!