45 lines
756 B
C++
45 lines
756 B
C++
#include <cmath>
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#include <corecrt_math_defines.h>
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#include <stdexcept>
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#include "Numeric.h"
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using namespace MbD;
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double MbD::Numeric::arcTan0to2piYoverX(double y, double x)
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{
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//"(y/x) arcTan in the range 0 to 2*pi."
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//"Double arcTan0to2piY: 1.0d overX: 1.0d."
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if (x > 0.0) {
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if (y >= 0) {
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//"First quadrant."
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return std::atan2(y, x);
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}
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else {
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//"Forth quadrant."
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return 2.0 * M_PI + std::atan2(y, x);
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}
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}
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else {
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if (x < 0.0) {
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//"Second and Third quadrants."
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return M_PI + std::atan2(y, x);
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}
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else {
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//"x = 0"
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if (y > 0.0) {
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return M_PI / 2.0;
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}
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else {
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if (y < 0.0) {
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return 1.5 * M_PI;
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}
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else {
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throw std::invalid_argument("atan2(0, 0) is not defined.");
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}
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}
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}
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}
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}
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