cam.Start3D2D
From GMod Wiki
| Function | |
| Syntax |
cam.Start3D2D( Vector position, Angle normal, Number scale ) Where is this used? |
| Description: | |
| Positions the rendering camera three dimensionally to draw on a plane. | |
| Returns: | nil |
| Part of Library: | cam |
| Realm: |
 |
| BBCode Link: | [b][url=http://wiki.garrysmod.com/?title=Cam.Start3D2D]Cam.Start3D2D [img]http://wiki.garrysmod.com/favicon.ico[/img][/url][/b] |
Examples
| Description | Print text on the screen in 3d. |
|---|---|
| Used on | |
| Code |
cam.Start3D2D( Vector(0, 0, 0), Angle(0, 0, 0), 1 )
draw.DrawText("Your Mother", "ScoreboardText", 0, 0, Color(255, 255, 255, 255), TEXT_ALIGN_CENTER )
cam.End3D2D()
|
| Output | Draws "Your Mother" at the Vector 0, 0, 0. |
| Description | Print 3D2D text above every player's world model. |
|---|---|
| Used on | |
| Code | surface.CreateFont ( "coolvetica", 40, 400, true, false, "CV20", true ) function DrawName( ply ) if !ply:Alive() then return end local offset = Vector( 0, 0, 85 ) local ang = LocalPlayer():EyeAngles() local pos = ply:GetPos() + offset + ang:Up() ang:RotateAroundAxis( ang:Forward(), 90 ) ang:RotateAroundAxis( ang:Right(), 90 ) cam.Start3D2D( pos, Angle( 0, ang.y, 90 ), 0.25 ) draw.DrawText( ply:GetName(), "CV20", 2, 2, Color( 255, 255, 255, 255 ), TEXT_ALIGN_CENTER ) cam.End3D2D() end hook.Add( "PostPlayerDraw", "DrawName", DrawName ) |
| Output | Draws the player's name above their world model. |
Additional Notes
- Seems to only work when called in ENT.Draw, ENT.DrawTranslucent, EFFECT.Render, Gamemode.PostDrawOpaqueRenderables , Gamemode.HUDPaint or SWEP.ViewModelDrawn. You may also use this inside of RenderScreenspaceEffects, if it's wrapped in cam.Start3D and cam.End3D.
- This may be used to draw a computer screen on a prop.
- It should also be noted that the position and angle do not seem to update when this is hooked via HUDPaint.
- The HUDPaint will draw in relevance to the HUD orthographic projection, to update, hook it to a render function such as ENT:Draw() and make use of surface drawing to render properly and to avoid overlaps of certain places.
-
Forgetting the scale argument can cause a hilarious rendering failThis doesn't seem to happen anymore, but you can get the same effect (IgnoreZ) by forgetting cam.End3D2D()
- These functions may be helpful for converting between Draw3D2D screen coordinates and world coordinates:
--[[ Converts from Draw3D2D screen coordinates to world coordinates. x and y are the coordinates to transform, in pixels. vPos is the position you gave Start3D2D. The screen is drawn from this point in the world. scale is a number you also gave to Start3D2D. The Draw3D2D screen is scaled this much aRot is the angles you gave Start3D2D. The screen is drawn rotated according to these angles. ]]-- local function ScreenToWorld(x,y,vPos,scale,aRot) local vWorldPos=Vector(x*scale,(-y)*scale,0); vWorldPos:Rotate(aRot); vWorldPos=vWorldPos+vPos; return vWorldPos; end --[[ Converts from world coordinates to Draw3D2D screen coordinates. vWorldPos is a vector in the world nearby a Draw3D2D screen. vPos is the position you gave Start3D2D. The screen is drawn from this point in the world. scale is a number you also gave to Start3D2D. aRot is the angles you gave Start3D2D. The screen is drawn rotated according to these angles. ]]-- local function WorldToScreen(vWorldPos,vPos,vScale,aRot) local vWorldPos=vWorldPos-vPos; vWorldPos:Rotate(Angle(0,-aRot.y,0)); vWorldPos:Rotate(Angle(-aRot.p,0,0)); vWorldPos:Rotate(Angle(0,0,-aRot.r)); return vWorldPos.x/vScale,(-vWorldPos.y)/vScale; end
