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gamemodes/sandbox/entities/effects/propspawn.lua

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+--[[
+| This file was obtained through the combined efforts
+| of Madbluntz & Plymouth Antiquarian Society.
+|
+| Credits: lifestorm, Gregory Wayne Rossel JR.,
+| 	Maloy, DrPepper10 @ RIP, Atle!
+|
+| Visit for more: https://plymouth.thetwilightzone.ru/
+--]]
+
+
+local cl_drawspawneffect = CreateConVar( "cl_drawspawneffect", "1", { FCVAR_ARCHIVE }, "Whether to draw the spawn effect when spawning objects." )
+
+local matRefract = Material( "models/spawn_effect" )
+
+function EFFECT:Init( data )
+
+	if ( !cl_drawspawneffect:GetBool() ) then return end
+
+	-- This is how long the spawn effect
+	-- takes from start to finish.
+	self.Time = 0.5
+	self.LifeTime = CurTime() + self.Time
+
+	local ent = data:GetEntity()
+
+	if ( !IsValid( ent ) ) then return end
+	if ( !ent:GetModel() ) then return end
+
+	self.ParentEntity = ent
+	self:SetModel( ent:GetModel() )
+	self:SetPos( ent:GetPos() )
+	self:SetAngles( ent:GetAngles() )
+	self:SetParent( ent )
+
+	self.OldRenderOverride = self.ParentEntity.RenderOverride
+	self.ParentEntity.SpawnEffect = self
+	self.ParentEntity.RenderOverride = self.RenderParent
+
+
+end
+
+function EFFECT:Think()
+
+	if ( !cl_drawspawneffect:GetBool() ) then return false end
+	if ( !IsValid( self.ParentEntity ) ) then return false end
+
+	local PPos = self.ParentEntity:GetPos()
+	self:SetPos( PPos + ( EyePos() - PPos ):GetNormal() )
+
+	if ( self.LifeTime > CurTime() ) then
+		return true
+	end
+
+	-- Remove the override only if our override was not overridden.
+	if ( self.ParentEntity.RenderOverride == self.RenderParent ) then
+		self.ParentEntity.RenderOverride = self.OldRenderOverride
+	end
+	self.ParentEntity.SpawnEffect = nil
+
+	return false
+
+end
+
+function EFFECT:Render()
+end
+
+function EFFECT:RenderOverlay( entity )
+
+	local Fraction = ( self.LifeTime - CurTime() ) / self.Time
+	local ColFrac = ( Fraction - 0.5 ) * 2
+
+	Fraction = math.Clamp( Fraction, 0, 1 )
+	ColFrac = math.Clamp( ColFrac, 0, 1 )
+
+	-- Change our model's alpha so the texture will fade out
+	--entity:SetColor( 255, 255, 255, 1 + 254 * (ColFrac) )
+
+	-- Place the camera a tiny bit closer to the entity.
+	-- It will draw a big bigger and we will skip any z buffer problems
+	local EyeNormal = entity:GetPos() - EyePos()
+	local Distance = EyeNormal:Length()
+	EyeNormal:Normalize()
+
+	local Pos = EyePos() + EyeNormal * Distance * 0.01
+
+	-- Start the new 3d camera position
+	local bClipping = self:StartClip( entity, 1.2 )
+	cam.Start3D( Pos, EyeAngles() )
+
+		-- If our card is DX8 or above draw the refraction effect
+		if ( render.GetDXLevel() >= 80 ) then
+
+			-- Update the refraction texture with whatever is drawn right now
+			render.UpdateRefractTexture()
+
+			matRefract:SetFloat( "$refractamount", Fraction * 0.1 )
+
+			-- Draw model with refraction texture
+			render.MaterialOverride( matRefract )
+				entity:DrawModel()
+			render.MaterialOverride()
+
+		end
+
+	-- Set the camera back to how it was
+	cam.End3D()
+	render.PopCustomClipPlane()
+	render.EnableClipping( bClipping )
+
+end
+
+function EFFECT:RenderParent()
+
+	if ( !IsValid( self ) ) then return end
+	if ( !IsValid( self.SpawnEffect ) ) then self.RenderOverride = nil return end
+
+	local bClipping = self.SpawnEffect:StartClip( self, 1 )
+
+	self:DrawModel()
+
+	render.PopCustomClipPlane()
+	render.EnableClipping( bClipping )
+
+	self.SpawnEffect:RenderOverlay( self )
+
+end
+
+function EFFECT:StartClip( model, spd )
+
+	local mn, mx = model:GetRenderBounds()
+	local Up = ( mx - mn ):GetNormal()
+	local Bottom = model:GetPos() + mn
+	local Top = model:GetPos() + mx
+
+	local Fraction = ( self.LifeTime - CurTime() ) / self.Time
+	Fraction = math.Clamp( Fraction / spd, 0, 1 )
+
+	local Lerped = LerpVector( Fraction, Bottom, Top )
+
+	local normal = Up
+	local distance = normal:Dot( Lerped )
+
+	local bEnabled = render.EnableClipping( true )
+	render.PushCustomClipPlane( normal, distance )
+
+	return bEnabled
+
+end