local FrameTime = FrameTime

local function calc_velocity(self, part)
    local diff = part.cached_pos - (part.last_pos or Vector(0,0,0))
    part.last_pos = part.cached_pos

    part.last_vel_smooth = part.last_vel_smooth or 0
    part.last_vel_smooth = (part.last_vel_smooth + (diff:Length() - part.last_vel_smooth) * FrameTime() * 4)

    return part.last_vel_smooth
end

PART.Inputs =
{
    time = RealTime,
    synced_time = CurTime,
    random = function(s, p)
        return math.random()
    end,

    camera_distance = function(self, parent)
        return p.cached_pos:Distance(pac.EyePos)
    end,
    angle_distance = function(self, parent)
        return math.Clamp(math.abs(pac.EyeAng:Forward():DotProduct((parent.cached_pos - pac.EyePos):GetNormalized())) - 0.5, 0, 1)
    end,

    -- outfit owner
    owner_velocity_length = function(self, parent)
        local owner = self:GetOwner(self.RootOwner)

        if owner:IsValid() then
            return parent:GetOwner(self.RootOwner):GetVelocity():Length()
        end

        return 0
    end,
    owner_velocity_forward = function(self, parent)
        local owner = self:GetOwner(self.RootOwner)

        if owner:IsValid() then
            return owner:EyeAngles():Forward():Dot(calc_velocity(parent))
        end

        return 0
    end,
    owner_velocity_right = function(self, parent)
        local owner = self:GetOwner(self.RootOwner)

        if owner:IsValid() then
            return owner:EyeAngles():Right():Dot(calc_velocity(parent))
        end

        return 0
    end,
    owner_velocity_up = function(self, parent)
        local owner = self:GetOwner(self.RootOwner)

        if owner:IsValid() then
            return owner:EyeAngles():Up():Dot(calc_velocity(parent))
        end

        return 0
    end,

    -- parent part
    parent_velocity_length = function(self, parent)
        parent = parent.Parent

        if parent:IsValid() then
            return calc_velocity(parent)
        end

        return 0
    end,
    parent_velocity_forward = function(self, parent)
        parent = parent.Parent

        if parent:IsValid() then
            return parent.cached_ang:Forward():Dot(calc_velocity(parent))
        end

        return 0
    end,
    parent_velocity_right = function(self, parent)
        parent = parent.Parent

        if parent:IsValid() then
            return parent.cached_ang:Right():Dot(calc_velocity(parent))
        end

        return 0
    end,
    parent_velocity_up = function(self, parent)
        parent = parent.Parent

        if parent:IsValid() then
            return parent.cached_ang:Up():Dot(calc_velocity(parent))
        end

        return 0
    end
}