r_locksurfaces

[blendogames]

I was wondering if it would be possible to get the r_locksurfaces to work correctly. r_locksurfaces is a debug command used to pause the culling update, allowing one to move around to see what is and isn't being rendered.

I should note that r_locksurfaces does not work in retail Doom 3, and only seems to work in Quake 4.

[DanielGibson]

I only get a black screen, only the HUD is still rendered. Is it the same for you?
(I'm not sure whether you meant "doesn't do anything useful at all" or "doesn't properly stop culling as it's supposed to")

[DanielGibson]

So far I couldn't figure out what's going wrong :-/

Normally I'd use Renderdoc to figure out what the engine is trying to render and why it doesn't and work backwards from there, but unfortunately Renderdoc doesn't support OpenGL 1.x - and while it claims to support OpenGL ES2.0 and 3.x, I couldn't get d3wasm to work either (it's based on dhewm3 and r_locksurfaces behaves the same there), it seems to crash when capturing a frame..

One more thing I might try (when I find some time again) is trying out d3wasm+renderdoc on another Linux machine that doesn't have a nvidia GPU (the crash seems to happen in a nvidia lib).

(No, I can't use nvidia nsight either, newer versions don't support my GPU anymore and older versions don't seem to work, possibly because my driver version is too new for them. I hate computers.)

[blendogames]

Yes, I'm also seeing the same black screen & HUD -- sorry, I didn't explain it very well! The player is still able to move around, but unfortunately the world is rendered as a black screen.

[DanielGibson]

Can you test this branch: https://github.com/DanielGibson/dhewm3/tree/r_locksurfaces-dhewm3 ?
It seems to work for me ;)

Note:

• Mirrors (and probably other kinds of subviews) might not do exactly what you expect (fixing this wouldn't be easy)
• It always renders whatever would be visible from the "locked" position right now, so for example if you look towards a closed door, set r_lockSurfaces 1 and then walk towards the door so it opens, the stuff behind the door is visible (if it's visible from the original position with the opened door). If this is a problem, just use noclip so doors don't open.
• You probably want to disable shadows (r_shadows 0 - is there some CVar for fullbright?), otherwise areas whichs polys are still rendered (but the corresponding lights are not) will just be black
• r_useScissor is automatically disabled while r_lockSurfaces is enabled
• I'd set r_clear 1 so not-rendered areas aren't black (which esp. in Doom3 itself isn't very meaningful) but purple
• It's probably still a good idea to additionally use r_showTris 1 (with r_useScissor 0) to check what's really rendered

[DanielGibson]

Windows binaries of that branch: dhewm3-1.5.2pre-win32-locksurfaces.zip

[blendogames]

r_locksurfaces now works great! Amazingly helpful feature, this is fantastic.

[DanielGibson]

Awesome, thanks for testing!

Merged it into the master branch.