Beginner: create a CRT screen curve from a quad

Forums Technical Discussion Beginner: create a CRT screen curve from a quad

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OrangyTang: Member; 12 posts; Joined: Jan. 2020; Offline

July 25, 2020 4:25 p.m.

I'm trying to model the front of an old CRT-tube style tv, but I'm stuck trying to make the curved front. Normally I know this kind of shape as a barrel distortion, but searching any searches with ‘houdini’ and ‘barrel’ end up with the wrong Houdini

I managed to subdivide the edges with a Resample, and it feels like it should be possible with a Bend but I can't get the right kind of punched-outwards bulge with it.

What node(s) should I be looking at here?

Thanks.


smbell: Member; 90 posts; Joined: Feb. 2017; Offline

July 25, 2020 8:12 p.m.

Easiest thing is probably to just use a lattice to pull the center area out a bit.

Grid > Shelf tool “Lattice” > select the center points of the edit node > translate in Z

Edited by smbell - July 25, 2020 20:14:33

Attachments:
Screenshot_15.jpg (66.4 KB)
Screenshot_16.jpg (42.8 KB)


eikonoklastes: Member; 447 posts; Joined: April 2018; Offline

July 26, 2020 3:46 a.m.

Could just cut a large sphere with a box.

Attachments:
Annotation 2020-07-26 114627.png (146.8 KB)


eikonoklastes: Member; 447 posts; Joined: April 2018; Offline

July 26, 2020 3:52 a.m.

Just realised, using a Ray would probably be cleaner and faster.

Attachments:
Annotation 2020-07-26 115106.png (85.5 KB)
curved screen.hiplc (117.1 KB)

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