Add ENTITY:DeterminePhysgunHalo() for all entities

[Zaurzo]

This will allow entities to modify how the physgun halo is drawn on them. This function has three returns: the entity or entities to draw the halo on, the color of the halo, and the size.

function ENT:DeterminePhysgunHalo(ply, color, size, weapon, boneid, pos)
    return self, color, size
end

The first return value can either be an entity, or a table of entities. I want to allow a table of entities, so that, for example, you can draw the halo on any entities that are parented to the physgunned entity. If it's nil, or it's not an entity or table of entities, it will suppress the halo.

The second and third return value is the halo color and size. These are optional, and it will fallback to the default color and size if omitted.

Example

Before:

Code:

function ENT:DeterminePhysgunHalo()
    local entsToHalo = self.haloTab

    if not entsToHalo then
        entsToHalo = { self }
        self.haloTab = entsToHalo
    end

    local light = self.light

    if not IsValid(light) then
        self.light = self:GetChildren()[1]

        return self
    end

    entsToHalo[2] = light

    return entsToHalo
end

After:

Example 2

Rainbow physgun halo:

function ENT:DeterminePhysgunHalo()

    return self, HSVToColor( ( CurTime() * 100 ) % 360, 1, 1 )

end