1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
{-# LANGUAGE GADTs #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE StandaloneDeriving #-}
module Hkl.Detector
( Detector(..)
, ImXpadS140
, Xpad32
, ZeroD
, coordinates
) where
import Data.Vector.Storable ( Vector
, fromList
)
import Hkl.PyFAI.Npt ( NptPoint ( NptPoint ) )
data ImXpadS140
data Xpad32
data ZeroD
data Detector a where
ImXpadS140 :: Detector ImXpadS140
Xpad32 :: Detector Xpad32
ZeroD :: Detector ZeroD
deriving instance Show (Detector a)
-- | Xpad Family
type Gap = Double
type Width = Int
type Index = Int
-- an xpad line is like this (pixel size, index)
-- | s 0 | s 1 | s 2 | ... | 5/2 s (w - 1) || 5/2 s w | s (w + 1) | ...
xpadLine :: Width -> Index -> Double
xpadLine w i'
| i' == 0 = s / 2
| i' == 1 = s * 3 / 2
| idx == 0 = s * (fromIntegral i' + 3 * fromIntegral c - 1 / 4)
| idx <= (w - 2) = s * (fromIntegral i' + 3 * fromIntegral c + 1 / 2)
| idx == (w - 1) = s * (fromIntegral i' + 3 * fromIntegral c + 5 / 4)
| otherwise = error $ "wront coordinates" ++ show i'
where
s = 130e-6
(c, idx) = divMod i' w
xpadLineWithGap :: Width -> Gap -> Index -> Double
xpadLineWithGap w g i' = s / 2 + (s * fromIntegral i') + g * fromIntegral (div i' w)
where
s = 130e-6
interp :: (Int -> Double) -> Double -> Double
interp f p
| p0 == p1 = f p0
| otherwise = (p - fromIntegral p0) * (f p1 - f p0) + f p0
where
p0 :: Int
p0 = floor p
p1 :: Int
p1 = ceiling p
-- compute the coordinated at a given point
coordinates :: Detector a -> NptPoint -> Vector Double
coordinates ZeroD (NptPoint 0 0) = fromList [0, 0, 0]
coordinates ZeroD _ = error "No coordinates in a ZeroD detecteor"
coordinates ImXpadS140 (NptPoint x y) =
fromList [ interp (xpadLine 120) y
, interp (xpadLine 80) x
, 0
]
coordinates Xpad32 (NptPoint x y) =
fromList [ interp (xpadLineWithGap 120 3.57e-3) y
, interp (xpadLine 80) x
, 0]
|
