BUG while displaying Sprites after using render.RenderView()

[EstevanTH]

Hello everyone,

I designed mirrors for vehicles in GMod. They use the function [I]render.RenderView()[/I] to render the mirror view and to capture it into a texture.

But once I used this function, sprites disappear or sometimes appear while they should not, during the current frame. This bug affects [I]env_sprite[/I] entities as well as sprites created with [I]render.DrawSprite()[/I].

I believe (but I am not sure) that [I]render.RenderView()[/I] alters the internal engine function used by [I]util.PixelVisible()[/I], also causing [I]env_sprite[/I]s not to appear correctly.

Here are sources so you can see by yourself:
- For the mirrors, the ones included in my truck: [URL="http://steamcommunity.com/sharedfiles/filedetails/?id=264862065"]MomoCars Truck Nuke for TTT, RP, Sandbox! (driveable)[/URL]
- The mirrors manual: [URL="http://gmod-games.thouvest.dyndns.info/developpers/vehicle_mirror.php"]Working mirrors for vehicles in Garry's Mod[/URL]
- For Lua sprites, simply use GMod lights in Sandbox
- For [I]env_sprite[/I] sprites, you can use this map: [URL="http://steamcommunity.com/sharedfiles/filedetails/?id=253540088"]RP_ChristmasTown Official[/URL]

Note: the sprites blink because of the FPS limiter of the mirrors, because they only disappear when the mirror content is rendered.
Note 2: the sprites do not appear in the mirrors neither.

Screenshot:
[IMG]https://www.dropbox.com/s/hu47youl0hxumy2/Truck_Nuke_Sprites_Bug.gif?dl=1[/IMG]

Thanks for your helpful advices!

Momo.

[Dgc2002]

I'd like some info on this as well. I made a simple overhead mini-map that worked fine except it affected lights in a similar way as in your post. My issue was opposite though, the mini-map cam could see lights that the player could not. Because of this lights that should be behind walls would render for the player(you would see the glow through walls.)

[EstevanTH]

Yeah, this is actually the same problem: the render origin for sprites visibility becomes incorrect.

Maybe there is a {position / angle / FOV} that allows to restore the player's render origin for sprites visibility. But it is not easy to find it. You can do the [I]render.RenderView()[/I] once after all other ones with these special parameters. But I have no idea yet of what parameters to set.

[Acecool]

You need a separate pixel visible handler per light. If you reuse the same pixel visible handler, you'll get these issues.

[EstevanTH]

Okay, but... I am not responsible of lights, only of the mirrors!!

And as you can see, the problem happens on [I]env_sprite[/I] entities spawned by the map, so I can do nothing... Also, it happens with [I]every[/I] sprite, even that from Sandbox lights and lamps!

And I do not understand what you mean: in Sandbox lamps and lights, the hook [I]ENT:DrawTranslucent[/I] is used. As I understood, it is called on every render target (main view, reflections, etc.), and it is called again at least once when [I]render.RenderView()[/I] is called. If this is true then the PixVis handle is refreshed for each render target.

Sorry but I can do nothing with your advice. But thanks for the information you brought me. :-)

[EstevanTH]

Okay, I gave a try about the PixVis handle.
I did something different.
On the base of Sandbox lights and lamps for my truck, I tried in 2 ways not to use the PixVis handle (so I do not do the DrawTranslucent at all, by returning).

It does not work. Sprites still disappear. Maybe I did not found the right test.
I tested 2 things:
- a flag that I set in the mirror while rendering,
- the current render target

If you have a better idea of a condition, I'm here to test it.