30 lines
1.2 KiB
C++
30 lines
1.2 KiB
C++
#include "Camera.h"
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#include <numbers>
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void raytry::Camera::for_each_ray(const QImage &image, const std::function<void(int, int, raytry::Ray)> &consumer) {
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const auto widthf = static_cast<float>(image.width());
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const auto heightf = static_cast<float>(image.height());
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const float widthToHeight = widthf / heightf;
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const float tan = std::tan(std::max(1.0f, std::min(hfov, 179.0f)) * std::numbers::pi_v<float> / 360);
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const float xblub = 2 * planeDistance * tan / widthf;
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QVector3D zeroOrigin{
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positionVec.x() - (xblub * (widthf / 2)),
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positionVec.y(),
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positionVec.z() + (xblub * widthToHeight * (heightf / 2))};
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zeroOrigin += forwardVec * planeDistance;
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for (int y = 0; y < image.height(); ++y) {
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for (int x = 0; x < image.width(); ++x) {
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const QVector3D &directionVec = zeroOrigin + QVector3D(static_cast<float>(x) * xblub, 0.0f, -static_cast<float>(y) * xblub * widthToHeight);
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consumer(x, y, Ray(positionVec, (directionVec - positionVec).normalized()));
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}
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}
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}
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const QVector3D &raytry::Camera::pos() const {
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return positionVec;
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}
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const QVector3D &raytry::Camera::fwd() const {
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return forwardVec;
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}
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