How does a Nail entity work , lua wise.

[Zencro]

For instance I'd like to create an entity that would act something like glue , but without actually needed a toolgun. I tried looking at the nail entity from sandbox but that didn't give me any clues , so does anybody know or have any idea how the nail entity work?

[RTM xBEASTx]

[url]http://luabin.foszor.com/code/gamemodes/sandbox/entities/weapons/gmod_tool/stools/nail.lua[/url]
Source.

[lua]
TOOL.Category = "Constraints"
TOOL.Name = "#Nail"
TOOL.Command = nil
TOOL.ConfigName = nil

TOOL.ClientConVar["forcelimit"] = "0"

TOOL.RightClickAutomatic = true

cleanup.Register( "nails" )

function TOOL:LeftClick( trace )

// Bail if we hit world or a player
if ( !trace.Entity:IsValid() || trace.Entity:IsPlayer() ) then return false end

// If there's no physics object then we can't constraint it!
if ( SERVER && !util.IsValidPhysicsObject( trace.Entity, trace.PhysicsBone ) ) then return false end

local tr = {}
tr.start = trace.HitPos
tr.endpos = trace.HitPos + (self:GetOwner():GetAimVector() * 16.0)
tr.filter = { self:GetOwner(), trace.Entity }
local trTwo = util.TraceLine( tr )

if ( trTwo.Hit && !trTwo.Entity:IsPlayer() ) then

// Get client's CVars
local forcelimit = self:GetClientNumber( "forcelimit" )

// Client can bail now
if ( CLIENT ) then return true end

local vOrigin = trace.HitPos - (self:GetOwner():GetAimVector() * 8.0)
local vDirection = self:GetOwner():GetAimVector():Angle()

vOrigin = trace.Entity:WorldToLocal( vOrigin )

// Weld them!
local constraint, nail = MakeNail( trace.Entity, trTwo.Entity, trace.PhysicsBone, trTwo.PhysicsBone, forcelimit, vOrigin, vDirection )
if !constraint:IsValid() then return end

undo.Create("Nail")
undo.AddEntity( constraint )
undo.AddEntity( nail )
undo.SetPlayer( self:GetOwner() )
undo.Finish()

self:GetOwner():AddCleanup( "nails", constraint )
self:GetOwner():AddCleanup( "nails", nail )

return true

end

end

function MakeNail( Ent1, Ent2, Bone1, Bone2, forcelimit, Pos, Ang )

local constraint = constraint.Weld( Ent1, Ent2, Bone1, Bone2, forcelimit, false )

constraint.Type = "Nail"
constraint.Pos = Pos
constraint.Ang = Ang

Pos = Ent1:LocalToWorld( Pos )

local nail = ents.Create( "gmod_nail" )
nail:SetPos( Pos )
nail:SetAngles( Ang )
nail:SetParentPhysNum( Bone1 )
nail:SetParent( Ent1 )

nail:Spawn()
nail:Activate()

constraint:DeleteOnRemove( nail )

return constraint, nail
end

duplicator.RegisterConstraint( "Nail", MakeNail, "Ent1", "Ent2", "Bone1", "Bone2", "forcelimit", "Pos", "Ang" )

function TOOL:RightClick( trace )

self:GetWeapon():SetNextSecondaryFire( CurTime() + 0.2 )
return self:LeftClick( trace )

end

function TOOL:Reload( trace )

if (!trace.Entity:IsValid() || trace.Entity:IsPlayer() ) then return false end
if ( CLIENT ) then return true end

local bool = constraint.RemoveConstraints( trace.Entity, "Nail" )
return bool

end[/lua]

[Donkie]

The nail tool is basicly just a weld, with an added nail detailentity. You see the magic happen in the "MakeNail" function, it's where the two props gets welded, and the nail gets put inbetween them.
At line 21 it makes a trace between the first prop, and into the next prop, that's where it declares if another prop is near enough to make a nail to it.

Could you clarify what you mean with "glue"?

[King Flawless]

The nail its self is just for visuals it works by just welding the props

[Zencro]

I already realized most of this :P , that's what my second post was for. Thanks anyways for the will to help.