Detector Geometry customization

2023-04-12 19:22:13 +00:00
parent 94ba13b3a1
commit 0973f3725d
52 changed files with 1335 additions and 973 deletions
@@ -1,49 +0,0 @@
-// Copyright (2019-2022) Paul Scherrer Institute
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-#include <cmath>
-#include "DiffractionGeometry.h"
-
-DiffractionGeometry::DiffractionGeometry(float in_beam_x_pxl, float in_beam_y_pxl, float in_detector_distance_mm,
-                                         float in_pixel_size_mm, float in_wavelength_A, Coord in_scattering_vector)
-        : beam_x_pxl(in_beam_x_pxl),
-        beam_y_pxl(in_beam_y_pxl),
-        detector_distance_mm(in_detector_distance_mm),
-        pixel_size_mm(in_pixel_size_mm),
-        wavelength_A(in_wavelength_A),
-        scattering_vector(in_scattering_vector) {}
-
-Coord DiffractionGeometry::DetectorToLab(float x_pxl, float y_pxl) const {
-    // Assumes planar detector, 90 deg towards beam
-    return {(x_pxl - beam_x_pxl) * pixel_size_mm ,
-            (y_pxl - beam_y_pxl) * pixel_size_mm ,
-            detector_distance_mm};
-}
-
-Coord DiffractionGeometry::DetectorToRecip(float x_pxl, float y_pxl) const {
-    return DetectorToLab(x_pxl, y_pxl).Normalize() / wavelength_A - scattering_vector;
-}
-
-float DiffractionGeometry::PxlToRes(float detector_x, float detector_y) const {
-    auto lab = DetectorToLab(detector_x, detector_y);
-
-    float beam_path = lab.Length();
-    if (beam_path == detector_distance_mm) return INFINITY;
-
-    float cos_2theta = detector_distance_mm / beam_path;
-    // cos(2theta) = cos(theta)^2 - sin(theta)^2
-    // cos(2theta) = 1 - 2*sin(theta)^2
-    // Technically two solutions for two theta, but it makes sense only to take positive one in this case
-    float sin_theta = sqrt((1-cos_2theta)/2);
-    return wavelength_A / (2 * sin_theta);
-}
-
-float DiffractionGeometry::ResToPxl(float resolution) const {
-    if (resolution == 0)
-        return INFINITY;
-
-    float sin_theta = wavelength_A / (2 * resolution);
-    float theta = asin(sin_theta);
-    float tan_2theta = tan(2 * theta);
-    return tan_2theta * detector_distance_mm / pixel_size_mm;
-}