Aligning flats on 3D sectors

[Rex Claussen]

I did a search on the forums and came up empty. How do I align flats on 3D sectors that do not fit within an editing grid (typically the 64*64 grid). I have some crates that are suspended from an overhead conveyor chain, and the in-game sectors overlap the grid. The flats for the crate tops and bottoms don't look right, because of course they are being drawn to fit the grid.

I tried using Line_AlignFloor & Line_AlignCeiling on the dummy sector but that didn't work. I even tried using those specials on the in-game sector (which I knew was not going to work), and sure enough it did not work.

[Graf Zahl]

There both specials are nasty and useless: They need to be used in a script, limiting their usefulness considerably.

You have to use

Sector_SetRotation = 185,
Sector_SetCeilingOffset = 186,
Sector_SetFloorOffset = 187,
Sector_SetCeilingScale = 188,
Sector_SetFloorScale = 189,

to change alignment - all in a script. For 3D floors it must be done in the control sector but you have tp swap ceiling and floor for obvious reasons.

[Rex Claussen]

Graf, I couldn't quite grasp what you were saying. It sounded like you were saying that Line_AlignFloor & Line_AlignCeiling need to be used in a script (but don't work), but then it also sounded like you said the other specials need to be used in a script.

Furthermore, what do those values represent (i.e., 185 - 189), and where are they inserted in the specials? Do I need to use all these specials to align flats? And will I need to play with the angles, etc. to see what works?

It would be great if you can provide an example. Thanks.

[Graf Zahl]

Yes, you need to use the specials i a script. But since the Line_* specials in some way need a reference line to work with they are a bit difficult to use. I never found a way to do it with them. The numbers are just the internal definitions because I was too lazy to edit them out.

Best look in the ZDoom Wiki for further information. If you need some maps as examples, there's a few uses in KDiZD.

[Enjay]

Sector_SetCeilingOffset = 186,
Sector_SetFloorOffset = 187,

Although Graf's name for those is actually a better description of what they do, you'll find them in the Wiki and zspecial.acs as Sector_SetCeilingPanning and Sector_SetFloorPanning.

[Graf Zahl]

Ugh. Please don't tell me that their internal names is different than their real name.

I remember being confused by this before and getting compiler errors.

Also there's Sector_SetFloor/CeilingScale2 specials which can be passed fixed point values for more precise scaling.

[Rex Claussen]

I got it to work using Sector_SetCeilingPanning and Sector_SetFloorPanning. Thanks.