79 lines
3.0 KiB
C++
79 lines
3.0 KiB
C++
// Copyright (2019-2023) Paul Scherrer Institute
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#include <cmath>
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#include "RadialIntegrationMapping.h"
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#include "../common/JFJochException.h"
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#include "../common/DiffractionGeometry.h"
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RadialIntegrationMapping::RadialIntegrationMapping(const DiffractionExperiment& experiment) :
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low_q(experiment.GetLowQForRadialInt_recipA()),
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high_q(experiment.GetHighQForRadialInt_recipA()),
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q_spacing(experiment.GetQSpacingForRadialInt_recipA()),
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pixel_to_bin_raw(experiment.GetModulesNum() * RAW_MODULE_SIZE),
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max_bin_number(0)
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{
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if (q_spacing < 0.0)
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throw JFJochException(JFJochExceptionCategory::InputParameterInvalid,
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"Q-spacing has to be >= 0.0");
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if (low_q >= high_q)
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throw JFJochException(JFJochExceptionCategory::InputParameterInvalid,
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"Low-Q must be smaller than high-Q");
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if (low_q <= 0)
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throw JFJochException(JFJochExceptionCategory::InputParameterInvalid,
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"Low-Q must be > 0");
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if (std::ceil((high_q-low_q) / q_spacing ) >= UINT16_MAX)
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throw JFJochException(JFJochExceptionCategory::InputParameterInvalid,
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"Cannot accommodate more than 65536 rings");
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for (int m = 0; m < experiment.GetModulesNum(); m++) {
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for (int pxl = 0; pxl < RAW_MODULE_SIZE; pxl++) {
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auto [x,y] = RawToConvertedCoordinate(experiment, m, pxl);
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double pixel_q = 2 * M_PI / PxlToRes(experiment, x, y);
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if ((pixel_q < low_q) || (pixel_q >= high_q))
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pixel_to_bin_raw[m * RAW_MODULE_SIZE + pxl] = UINT16_MAX;
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else
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pixel_to_bin_raw[m * RAW_MODULE_SIZE + pxl] = std::floor((pixel_q - low_q) / q_spacing);
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}
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}
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// In principle max bin number is equal to std::floor((high_q - low_q) / q_spacing), but it might be lower than this
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// depending on detector distance and beam center position
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for (const auto &i: pixel_to_bin_raw) {
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if ((i != UINT16_MAX) && (i > max_bin_number))
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max_bin_number = i;
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}
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bin_to_q.resize(max_bin_number + 1);
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for (int i = 0; i < max_bin_number + 1; i++)
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bin_to_q[i] = static_cast<float>(q_spacing * (i + 0.5) + low_q);
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solid_angle_corr.resize(max_bin_number + 1);
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for (int i = 0; i < max_bin_number + 1; i++)
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solid_angle_corr[i] = 1.0f / CalcRadIntSolidAngleCorr(experiment, bin_to_q[i]);
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}
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uint16_t RadialIntegrationMapping::GetBinNumber() const {
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return max_bin_number + 1;
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}
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const std::vector<uint16_t> &RadialIntegrationMapping::GetPixelToBinMappingRaw() const {
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return pixel_to_bin_raw;
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}
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const std::vector<float> &RadialIntegrationMapping::GetBinToQ() const {
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return bin_to_q;
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}
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const std::vector<float> &RadialIntegrationMapping::GetSolidAngleCorr() const {
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return solid_angle_corr;
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}
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double RadialIntegrationMapping::QToBin(double q) const {
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return std::min(static_cast<double>(max_bin_number), std::max(0.0, (q - low_q) / q_spacing));
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}
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