Material proxy and render texture problem

[xDShot]

I'm making a material with procedurally changeable texture on it. More precisely - with changeable text. For sample, I added this code:

local rttexture = GetRenderTarget( "MyTextRTback", 512, 256 )
local function RenderTextTexture( side, mat )

mat:SetTexture( "$basetexture", rttexture )

local oldW = ScrW()
local oldH = ScrH()

local OldRT = render.GetRenderTarget()

local renderwidth = 512
local renderheight = 256

-- Set up our view for drawing to the texture
render.SetRenderTarget( rttexture )
render.SetViewPort( 0, 0, renderwidth, renderheight )
cam.Start2D()
render.Clear( 0, 0, 0, 255 )
draw.DrawText( "Sample text", "Trebuchet18", 0, 0, Color( 255, 255, 255, 255 ), TEXT_ALIGN_CENTER )
cam.End2D()
render.SetRenderTarget( OldRT )
render.SetViewPort( 0, 0, oldW, oldH )
end

matproxy.Add( {
name = "MyText",
init = function( self, mat, values ) end,
bind = function( self, mat, ent )
RenderTextTexture( "back", mat )
end
} )

And added MyText proxy into vmt.

The problem is that the material becomes fully invisible. How do I make it to proprely render text on it?

[xDShot]

bump

[thegrb93]

I'd use render.pushRenderTarget instead to clean up the code. Also try checking if you can see your rendertarget is rendering correctly with mat_texturelist. If it is, then it's something wrong with the material or proxy.

[xDShot]

Could you please put some examples using those render.pushRenderTarget and render.popRender? I still don't get it what are they supped to do.

>Also try checking if you can see your rendertarget is rendering correctly with mat_texturelist
How?

[Mijyuoon]

Could you please put some examples using those render.pushRenderTarget and render.popRender? I still don't get it what are they supped to do.

They're supposed to do exactly same shit you're doing with all this clusterf*ck but without actually doing it.
local oldW = ScrW()
local oldH = ScrH()

local OldRT = render.GetRenderTarget()

local renderwidth = 512
local renderheight = 256

render.SetRenderTarget( rttexture )
render.SetViewPort( 0, 0, renderwidth, renderheight )
-- stuff here
render.SetRenderTarget( OldRT )
render.SetViewPort( 0, 0, oldW, oldH )

You can (and should) be using this instead.
render.PushRenderTarget( rttexture)
-- stuff here
render.PopRenderTarget()

[xDShot]

> Or did you just copypaste that bit from somewhere without understanding what it does?

the stuff was copypasted from garrysmod/gamemodes/sandbox/entities/weapons/gmod_tool/cl_viewscreen.lua - function SWEP:RenderScreen(). I don't get it why it does work for tool screen but not any random material. Mine is still invisible.

[xDShot]

bump

[xDShot]

bump