Resolved Depth Buffer bug

[Akabenko]

PAC3 models is invisible in resolved depth buffer.

Run this code. NeedsDepthPass activate render of depth buffer. And then check PAC3 models on Reaolved depth texture.

hook.Run("NeedsDepthPass", "ResolvedDepthBuffer", function()
return true end)

hook.Add("HUDPaint", "DebugDepth", function()
render.DrawTextureToScreen(render.GetResolvedFullFrameDepth())
end)

[Akabenko]

Facepunch/garrysmod-requests#3189

[Akabenko]

[pingu7867]

Even with render.OverrideDepthEnable immediately before the models' DrawModel calls, I couldn't get it to write depth yesterday. So the problem probably lies with the entities themselves.

There might be something preventing it due to what type of entity it is or some of the flags it's created with. I think that's a lead.

[pingu7867]

PAC model entities are set to nodraw. I still don't really understand how the rendering pipeline works at the Source engine level, but from what I can understand, manually calling the DrawModel function doesn't write depth but the entity draw calls (whatever they are) from the engine do.

There are some operations on actual entities that pac does which do show up if we skip the ent:DrawModel() call and un-nodraw the parts' entities, but the rendering override-related ones don't. For example color modulation (we use render.SetColorModulation instead of ENT:SetColor) and material binding don't apply, but model scale, bones, bonemerging do apply.

[Akabenko]

@pingu7867 SSAODepth Pass can see models, if then called from PrePlayerDraw, PostPlayerDraw or RenderOverride. PreDrawOpaqueRenderables and PostDrawOpaqueRenderables not called from SSAODepthPass.

[Akabenko]

So if Rubat will Run PreDrawOpaqueRenderables and PostDrawOpaqueRenderables from SSAODepthPass, then

render_MaterialOverride and render_ModelMaterialOverride of PAC3 will kill render of Depth. So its nice to check flags arg of drawing function to STUDIO_SHADOWDEPTHTEXTURE and STUDIO_SSAODEPTHTEXTURE to avoid running this funcs in depth passes.

Removed lines: