35 lines
1.2 KiB
C++
35 lines
1.2 KiB
C++
// Maths.cpp : Définit les fonctions de la bibliothèque statique.
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//
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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#include "Maths.hpp"
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#include <cmath>
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float Maths::FOVHToV(float fovH, float aspect) {
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return 2.0f * std::atan(std::tan(fovH * 0.5f * (M_PI / 180.0f)) / aspect) * (180.0f / M_PI);
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}
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float Maths::FOVVToH(float fovV, float aspect) {
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return 2.0f * std::atan(std::tan(fovV * 0.5f * (M_PI / 180.0f)) * aspect) * (180.0f / M_PI);
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}
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double Maths::DegreesToRadians(double degrees) {
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return degrees * M_PI / 180.0;
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}
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// Converts radians in degree
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double Maths::RadiansToDegrees(double radians) {
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return radians * 180.0 / M_PI;
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}
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double Maths::CompensateHorizontalFOV(double baseHorizontalFOVDeg, double baseAspectRatio, double targetAspectRatio) {
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double baseFOVRad = DegreesToRadians(baseHorizontalFOVDeg);
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// Step 1 : FOV vertical from horizontal FOV
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double verticalFOVRad = 2.0 * std::atan(std::tan(baseFOVRad / 2.0) / baseAspectRatio);
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// Step 2 : New horizontal FOV for target aspect ratio
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double newFOVRad = 2.0 * std::atan(std::tan(verticalFOVRad / 2.0) * targetAspectRatio);
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return RadiansToDegrees(newFOVRad);
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} |