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Finished rendering proof of concept; starting git repo for continued development
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‎gmod_worldportal.fgd

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//=============================================================================
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//
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// Purpose: Garry's Mod world portal declarations
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//
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//=============================================================================
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@include "base.fgd"
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@BaseClass = LinkedPortalDoor : "An entity that can be linked to another door and create a passage between them dynamically."
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[
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input SetPair(integer) : "Changes the pair of portals this portal belongs to"
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input Open(void) : "Open the door and cause the portal to activate."
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input Close(void) : "Close the door and cause the portal to deactivate."
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output OnOpen(void) : "Called when the door has started its open animation."
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output OnClose(void) : "Called when the door has started its close animation."
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output OnEntityTeleportFromMe(void) : "When any entity is teleported from this portal to the linked partner."
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output OnPlayerTeleportFromMe(void) : "When the player is teleported from this portal to the linked partner."
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output OnEntityTeleportToMe(void) : "When any entity is teleported from this linked partner to the portal."
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output OnPlayerTeleportToMe(void) : "When the player is teleported from this linked partner to the portal."
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]
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@PointClass base(Targetname, Parentname, Angles, LinkedPortalDoor) studio("models/editor/axis_helper_thick.mdl") = linked_portal_door :
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"A door which is linked by a portal to another 'linked_portal_door' entity."
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[
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pair(integer) : "Pair" : 1 : "Unique identifier for a set of portals."
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width(integer) : "Width" : 128 : "Width of the desired portal."
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height(integer) : "Height" : 128 : "Height of the desired portal."
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startactive(integer) : "Start Active" : 1 : "Whether to start the linkage as active from the start."
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]

‎lua/autorun/client/init.lua

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local portals
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local matView = CreateMaterial(
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"UnlitGeneric",
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"GMODScreenspace",
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{
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["$basetexturetransform"] = "center .5 .5 scale -1 -1 rotate 0 translate 0 0",
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["$texturealpha"] = "0",
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["$vertexalpha"] = "1",
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}
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)
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local matDummy = Material( "debug/white" )
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-- Render the portal views
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local drawing = false
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hook.Add( "RenderScene", "WorldPortalRenderHook", function( plyOrigin, plyAngles)
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if ( not portals ) then return end
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if ( drawing ) then return end
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local oldWepColor = LocalPlayer():GetWeaponColor()
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LocalPlayer():SetWeaponColor( Vector(0, 0, 0) ) --no more phys gun glaw or beam
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for _, portal in ipairs( portals ) do
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-- Render view from portal
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local oldRT = render.GetRenderTarget()
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render.SetRenderTarget( portal.texture )
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render.Clear( 0, 0, 0, 255 )
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render.ClearDepth()
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render.ClearStencil()
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render.EnableClipping(true)
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--render.PopCustomClipPlane()
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render.PushCustomClipPlane(portals[portal.exit].forward, portals[portal.exit].forward:Dot(portals[portal.exit].pos) )
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local rotation = portals[portal.exit].forward:Angle() - portal.forward:Angle()
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rotation = rotation + Angle( 0, 180, 0)
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local offset = LocalPlayer():EyePos() - portal.pos
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--offset = calculateNewOffset( portal, offset )
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offset:Rotate( rotation )
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local camPos = portals[portal.exit].pos + offset
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local camAngles = plyAngles + rotation
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drawing = true
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render.RenderView( {
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x = 0,
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y = 0,
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w = ScrW(),
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h = ScrH(),
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origin = camPos,
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angles = camAngles,
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drawpostprocess = true,
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drawhud = false,
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drawmonitors = false,
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drawviewmodel = false,
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} )
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drawing = false
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render.PopCustomClipPlane()
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render.EnableClipping(false)
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render.SetRenderTarget( oldRT )
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end
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LocalPlayer():SetWeaponColor( oldWepColor )
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end )
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hook.Add( "PreDrawOpaqueRenderables", "WorldPortalRenderHook", function()
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render.UpdateScreenEffectTexture()
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if ( not portals ) then return end
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if ( drawing ) then return end
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for _, portal in ipairs( portals ) do
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-- Draw view over portal
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render.ClearStencil()
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render.SetStencilEnable( true )
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render.SetStencilWriteMask( 1 )
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render.SetStencilTestMask( 1 )
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render.SetStencilFailOperation( STENCILOPERATION_KEEP )
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render.SetStencilZFailOperation( STENCILOPERATION_KEEP )
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render.SetStencilPassOperation( STENCILOPERATION_REPLACE )
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render.SetStencilCompareFunction( STENCILCOMPARISONFUNCTION_ALWAYS )
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render.SetStencilReferenceValue( 1 )
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render.SetMaterial( matDummy )
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render.SetColorModulation( 1, 1, 1 )
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render.DrawQuadEasy( portal.pos, portal.forward, portal.width, portal.height, Color( 255, 255, 255, 255) )
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render.SetStencilCompareFunction( STENCILCOMPARISONFUNCTION_EQUAL )
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render.SetStencilPassOperation( STENCILOPERATION_REPLACE )
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render.SetStencilReferenceValue( 1 )
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matView:SetTexture( "$basetexture", portal.texture )
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render.SetMaterial( matView )
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render.DrawScreenQuad()
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render.SetStencilEnable( false )
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end
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end )
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-- Receive portal info
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net.Receive("WorldPortalUpdate", function()
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portals = {}
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for i = 1, net.ReadInt( 16 ) do
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portals[i] = {}
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portals[i].pos = net.ReadVector()
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portals[i].width = net.ReadInt( 16 )
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portals[i].height = net.ReadInt( 16 )
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portals[i].forward = net.ReadVector()
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portals[i].exit = net.ReadInt( 16 )
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portals[i].texture = GetRenderTarget("portal" .. i,
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ScrW(),
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ScrH(),
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false
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)
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end
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end )
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-- Set it to draw the player while rendering portals
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-- Calling Start3D to fix this is incredibly hacky
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hook.Add( "PostDrawEffects", "WorldPortalPotentialFix", function()
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cam.Start3D( EyePos(), EyeAngles() )
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cam.End3D()
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end)
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hook.Add( "ShouldDrawLocalPlayer", "WorldPortalRenderHook", function()
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return drawing
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end)

‎lua/autorun/server/init.lua

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-- Send portal render code
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AddCSLuaFile( "autorun/client/init.lua" )
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-- Precache network string
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util.AddNetworkString( "WorldPortalUpdate" )
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-- Send info about portals to clients
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local function WorldPortalUpdate( ply )
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ply:DrawViewModel(false)
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local portals = ents.FindByClass( "linked_portal_door" )
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net.Start( "WorldPortalUpdate" )
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net.WriteInt( #portals, 16 )
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for _, portal in ipairs( portals ) do
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net.WriteVector( portal:GetPos() )
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net.WriteInt( portal.width, 16 )
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net.WriteInt( portal.height, 16 )
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net.WriteVector( portal.forward )
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net.WriteInt( table.KeyFromValue( portals, portal.exit ), 16 )
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end
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net.Send( ply )
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end
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hook.Add( "PlayerInitialSpawn", "WorldPortalUpdateTransmission", WorldPortalUpdate )
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-- Set up visibility through portals
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hook.Add( "SetupPlayerVisibility", "WorldPortalVisibility", function( ply, ent )
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for _, portal in ipairs( ents.FindByClass( "linked_portal_door" ) ) do
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AddOriginToPVS( portal:GetPos() )
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end
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end )

‎lua/entities/linked_portal_door/init.lua

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ENT.Type = "point"
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-- Find paired entity
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-- not the most efficient implementation, but good enough for now
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function ENT:Think()
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-- Determine exit portal
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if ( !self.exit ) then
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for _, ent in ipairs( ents.FindByClass( "linked_portal_door" ) ) do
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if ( ent ~= self and ent.pair == self.pair ) then
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self.exit = ent
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end
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end
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end
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end
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-- Collect properties
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function ENT:KeyValue( key, value )
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if ( key == "pair" ) then
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self.pair = tonumber( value )
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elseif ( key == "width" ) then
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self.width = tonumber( value )
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elseif ( key == "height" ) then
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self.height = tonumber( value )
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elseif ( key == "angles" ) then
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local args = value:Split( " " )
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for k, arg in pairs( args ) do
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args[k] = tonumber(arg)
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end
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self.forward = Angle( unpack(args) ):Forward()
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print( value, forward )
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end
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end

‎maps/spacial_bullshit.bsp

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