134 lines
4.9 KiB
C++
134 lines
4.9 KiB
C++
// Copyright (2019-2023) Paul Scherrer Institute
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#include <catch2/catch_all.hpp>
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#include "../common/DiffractionGeometry.h"
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#include <iostream>
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TEST_CASE("RecipToDetector_1", "[LinearAlgebra][Coord]") {
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DiffractionExperiment x(DetectorGeometry(8, 2));
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x.BeamX_pxl(1024).BeamY_pxl(1024).DetectorDistance_mm(120);
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float pos_x = 512, pos_y = 512;
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auto recip = DetectorToRecip(x, pos_x, pos_y);
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auto [proj_x, proj_y] = RecipToDector(x, recip);
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REQUIRE(proj_x == Catch::Approx(pos_x));
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REQUIRE(proj_y == Catch::Approx(pos_y));
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REQUIRE((recip - DetectorToRecip(x, proj_x, proj_y)).Length() < 0.00000001f);
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REQUIRE(DistFromEwaldSphere(x, recip) < 4e-4);
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}
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TEST_CASE("RecipToDetector_2", "[LinearAlgebra][Coord]") {
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DiffractionExperiment x(DetectorGeometry(8, 2));
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x.BeamX_pxl(1024).BeamY_pxl(1024).DetectorDistance_mm(120);
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float pos_x = 1023, pos_y = 1023;
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auto recip = DetectorToRecip(x, pos_x, pos_y);
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auto [proj_x, proj_y] = RecipToDector(x, recip);
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REQUIRE(proj_x == Catch::Approx(pos_x));
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REQUIRE(proj_y == Catch::Approx(pos_y));
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REQUIRE((recip - DetectorToRecip(x, proj_x, proj_y)).Length() < 0.00000001f);
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REQUIRE(DistFromEwaldSphere(x, recip) < 4e-4);
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}
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TEST_CASE("RecipToDetector_3", "[LinearAlgebra][Coord]") {
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DiffractionExperiment x(DetectorGeometry(8, 2));
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x.BeamX_pxl(1024).BeamY_pxl(1024).DetectorDistance_mm(120);
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float pos_x = 30, pos_y = 30;
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auto recip = DetectorToRecip(x, pos_x, pos_y);
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auto [proj_x, proj_y] = RecipToDector(x, recip);
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REQUIRE(proj_x == Catch::Approx(pos_x));
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REQUIRE(proj_y == Catch::Approx(pos_y));
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REQUIRE((recip - DetectorToRecip(x, proj_x, proj_y)).Length() < 0.00000001f);
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REQUIRE(DistFromEwaldSphere(x, recip) < 4e-4);
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}
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TEST_CASE("Phi","") {
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DiffractionExperiment x(DetectorGeometry(8, 2, 8, 36));
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x.DetectorDistance_mm(75).PhotonEnergy_keV(WVL_1A_IN_KEV);
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x.BeamX_pxl(1000).BeamY_pxl(1000);
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REQUIRE(Phi(x, 2000, 1000) == Catch::Approx(0.0));
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REQUIRE(Phi(x, 1000, 2000) == Catch::Approx(M_PI_2));
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REQUIRE(Phi(x, 2000, 2000) == Catch::Approx(M_PI_4));
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}
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TEST_CASE("Cos2Theta","") {
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DiffractionExperiment x(DetectorGeometry(8, 2, 8, 36));
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x.DetectorDistance_mm(75).PhotonEnergy_keV(WVL_1A_IN_KEV);
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x.BeamX_pxl(1000).BeamY_pxl(1000);
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// det distance == 1000 pixel
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// theta = 30 deg
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// tan(2 * theta) = sqrt(3)
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REQUIRE(CosTwoTheta(x, 1000, 1000 * (1.0 + sqrt(3))) == Catch::Approx(0.5f));
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}
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TEST_CASE("PxlToRes","") {
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DiffractionExperiment x(DetectorGeometry(8, 2, 8, 36));
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x.DetectorDistance_mm(75).PhotonEnergy_keV(WVL_1A_IN_KEV);
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// sin(theta) = 1/2
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// theta = 30 deg
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// tan(2 * theta) = sqrt(3)
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REQUIRE(PxlToRes(x, 0, 1000 * sqrt(3)) == Catch::Approx(1.0));
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// sin(theta) = 1/4
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// theta = 14.47 deg
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// tan(2 * theta) = 0.55328333517
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REQUIRE(PxlToRes(x, 1000 * 0.55328333517 * cosf(1), 1000 * 0.55328333517 * sinf(1)) == Catch::Approx(2.0));
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}
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TEST_CASE("ResToPxl","") {
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DiffractionExperiment x(DetectorGeometry(8, 2, 8, 36));
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x.DetectorDistance_mm(75).PhotonEnergy_keV(WVL_1A_IN_KEV);
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// sin(theta) = 1/2
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// theta = 30 deg
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// tan(2 * theta) = sqrt(3)
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REQUIRE(ResToPxl(x, 1.0) == Catch::Approx(1000 * sqrt(3)));
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// sin(theta) = 1/4
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// theta = 14.47 deg
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// tan(2 * theta) = 0.55328333517
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REQUIRE(ResToPxl(x, 2.0) == Catch::Approx(1000 * 0.55328333517));
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}
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TEST_CASE("SolidAngleCorrection","") {
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DiffractionExperiment x;
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x.PhotonEnergy_keV(WVL_1A_IN_KEV);
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x.BeamX_pxl(1000).BeamY_pxl(1000).DetectorDistance_mm(75);
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REQUIRE(CalcAzIntSolidAngleCorr(x, 0.0) == 1.0f);
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REQUIRE(CalcAzIntSolidAngleCorr(x, 2 * M_PI) == Catch::Approx(0.5f * 0.5f * 0.5f));
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// theta = 30 deg
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// cos (2 * theta) = 1/2
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REQUIRE(CalcAzIntSolidAngleCorr(x, 1000, 1000) == 1.0f);
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REQUIRE(CalcAzIntSolidAngleCorr(x, 1000 * (1.0 + sqrt(3)), 1000) == Catch::Approx(0.5f * 0.5f * 0.5f));
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}
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TEST_CASE("PolarizationCorrection","") {
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DiffractionExperiment x;
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x.PhotonEnergy_keV(WVL_1A_IN_KEV);
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x.BeamX_pxl(1000).BeamY_pxl(1000).DetectorDistance_mm(75);
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// Circular polarization 0.5*(1+cos(2theta)^2)
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x.PolarizationFactor(0);
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REQUIRE(CalcAzIntPolarizationCorr(x, 1000 * (1.0 + sqrt(3)), 1000, 0) == Catch::Approx(0.5f * (1 + 0.5f * 0.5f)));
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REQUIRE(CalcAzIntPolarizationCorr(x, 1000, 1000 * (1.0 + sqrt(3)), 0) == Catch::Approx(0.5f * (1 + 0.5f * 0.5f)));
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// Horizontal polarization
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x.PolarizationFactor(1);
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// No correction in vertical direction
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REQUIRE(CalcAzIntPolarizationCorr(x, 1000, 1000 * (1.0 + sqrt(3)), 1) == Catch::Approx(1.0f));
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REQUIRE(CalcAzIntPolarizationCorr(x, 1000, 1000 * (1.0 - sqrt(3)), 1) == Catch::Approx(1.0f));
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// cos(2*theta)^2 in horizontal direction
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REQUIRE(CalcAzIntPolarizationCorr(x, 1000 * (1.0 + sqrt(3)), 1000, 1) == Catch::Approx(0.5f * 0.5f));
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REQUIRE(CalcAzIntPolarizationCorr(x, 1000 * (1.0 - sqrt(3)), 1000, 1) == Catch::Approx(0.5f * 0.5f));
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}
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