Tiles or shingles tangential to sphere surface

[art3mis]

Using a scatter and new copytopoints SOP to try and wrap tiles or shingles around a sphere.

The issue is that the tiles all have the same orientation. (see attached) They need to wrap the surface.

I've tried adding a new points SOP with Class = points and Attribute = Normal with the VEXpression

 self + value

and can change the direction of the tiles but only globally.

Can anyone have a look at the attached .hip and tell me what I am missing?

tiles_wrap_sphere.hiplc

Edited June 22, 2017 by art3mis

[Noobini]

after the sphere simply do attribwrangle, @N = @N;

then scatter, then copytopoints

(or in terms of the new Points, just self instead of + value, then scatter, then copytopoints)

Edited June 22, 2017 by Noobini

[art3mis]

Thanks! Tried both suggestions but...nope. Again orientation is changed but all tiles have the same orientation. Something missing I think...

I think I need to modify self + value in my Points sop so that the normals are all tangential to the sphere surface.

Edited June 22, 2017 by art3mis

[Noobini]

01) your sphere is still a primitive, I've set it to polygon

02) your 'plane' must be Z facing...because Z is the axis that is used to line up with the normal....if it is a ''pointy' object...like the pig head...naturally you want the top of the head to line up with the normal...so in the file I included the pig head turned 90deg. Plug this in and see...much easier than to see with a plane.

 

tiles_aligned.hipnc

tiles_aligned_randomrot.hipnc

Edited June 22, 2017 by Noobini

[art3mis]

Thanks! Appreciated. Also another thing that was confusing me is that a default Sphere only contains a single point.