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3 Dimensional Chat / Hollow function

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JeroenNL
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Posted: 9th Sep 2003 00:32
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Hi there,

I've heard modellers talk about Hollow functions. As I'm writing a 3d modeller (level editor) myself (the DeleD program i've mentioned on this forum before ) I would like to know more about it. What does it do, how does it work? Can anyone enlighten me?

Bye,
Jeroen

Use DeleD to get skilled in 3d editing! Visit http://www.gamefortress.com/delgine for more info.
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CattleRustler
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Posted: 9th Sep 2003 01:12
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in Valve Hammer the Hollow or Make Hollow routine takes a selected piece of geometry, and hollows it out from the inside (geometric center). So lets say I have a cube, select it, choose make hollow, input dialog asks for wall thickness in units, set the wall thickness, apply. The function carves out the geometry to leave a hollow space within.

As far as how to program one I have absolutely no idea

-RUST-
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Hamish McHaggis
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Posted: 9th Sep 2003 01:30
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As far as I can think, you'd just flip the object normals, then extrude all the faces outwards.

Brains are for idiots.

Athelon XP 1400 Plus - Nvidia Geforce MX400 - 256mb RAM
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CattleRustler
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Posted: 9th Sep 2003 01:38
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errm, yeah, whatever he just said


-RUST-
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JeroenNL
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Posted: 9th Sep 2003 11:14
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Yeah I understand perfectly what you both are saying. I think I definately should build this into DeleD.

Are there any functions simular to Hollow that should be in a 3d editor?

Use DeleD to get skilled in 3d editing! Visit http://www.gamefortress.com/delgine for more info.
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CattleRustler
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Posted: 9th Sep 2003 17:58
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yes, the "MakeMyEntireMap" function !


good luck

-RUST-
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JeroenNL
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Posted: 9th Sep 2003 18:05
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I've already made that function!

Use DeleD to get skilled in 3d editing! Visit http://www.gamefortress.com/delgine for more info.
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Dreamora
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Posted: 10th Sep 2003 06:28
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Carve or something similar should be in.
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JeroenNL
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Posted: 10th Sep 2003 10:32
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Can you explain the Carve function?

Use DeleD to get skilled in 3d editing! Visit http://www.gamefortress.com/delgine for more info.
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JeroenNL
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Posted: 12th Sep 2003 16:59
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Well, I implemented the Hollow function in DeleD. I do this by extruding all polygons of the object by a certain amount (e.g 50 units) and then use the Reverse Vertice Order of each original polygon. Works like a charm!

Use DeleD to get skilled in 3d editing! Visit http://www.gamefortress.com/delgine for more info.
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granada
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Posted: 12th Sep 2003 18:36
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just gets better all the time

just trying to learn
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CattleRustler
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Posted: 12th Sep 2003 19:28
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Quote: "Can you explain the Carve function?"


I think you mean something similar to 3DStudio Max Boolean functions.
In 3dsmax you can use one object to carve away from another. Let's say you had a cube, then you make a long cylinder, you position the cylinder so it is skewering thru the cube, you carve out the cube using the cylinder, and you're left with a cube with a hole completely thru it. There are other variations of the Boolean operations but I can't rightly explain it. Maybe someone else here can explain further, but that's the one "carve" operation I know of.

-RUST-
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spooky
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Posted: 13th Sep 2003 14:54
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Also, these boolean operations come in Upgrade 6 I believe. There is a good post about it somewhere but I can't find it.

If your mansion house needs haunting, just call Rentaghost!
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