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#include <stdexcept>
#include "camera.h"
Camera::Camera(SceneCameraData cameraData) :
m_pos(cameraData.pos),
m_heightAngle(cameraData.heightAngle),
m_focalLength(cameraData.focalLength),
m_aperture(cameraData.aperture)
{
// VIEW MATRIX INTIALIZATION
// cast to 3 for dots & cross
glm::vec3 look3{cameraData.look.x, cameraData.look.y, cameraData.look.z};
glm::vec3 up3{cameraData.up.x, cameraData.up.y, cameraData.up.z};
// calculate new basis
glm::vec3 e0 = -glm::normalize(look3);
glm::vec3 e1 = glm::normalize(up3 - glm::dot(up3, e0) * e0);
glm::vec3 e2 = glm::cross(e1, e0);
glm::mat4 alignment
{
e2.x, e1.x, e0.x, 0.f,
e2.y, e1.y, e0.y, 0.f,
e2.z, e1.z, e0.z, 0.f,
0.f, 0.f, 0.f, 1.f
};
glm::mat4 translation
{
1.f, 0.f, 0.f, 0.f,
0.f, 1.f, 0.f, 0.f,
0.f, 0.f, 1.f, 0.f,
-cameraData.pos.x, -cameraData.pos.y, -cameraData.pos.z, 1.f
};
m_viewMatrix = alignment * translation;
m_inverse = glm::inverse(m_viewMatrix);
}
glm::mat4 Camera::getViewMatrix() const {
// Optional TODO: implement the getter or make your own design
return m_viewMatrix;
}
glm::mat4 Camera::getInverseViewMatrix() const {
// Optional TODO: implement the getter or make your own design
return m_inverse;
}
float Camera::getAspectRatio() const {
// Optional TODO: implement the getter or make your own design
throw std::runtime_error("not implemented");
}
float Camera::getHeightAngle() const {
// Optional TODO: implement the getter or make your own design
return m_heightAngle;
}
float Camera::getFocalLength() const {
// Optional TODO: implement the getter or make your own design
return m_focalLength;
}
float Camera::getAperture() const {
// Optional TODO: implement the getter or make your own design
return m_aperture;
}
glm::vec3 Camera::getPos() const {
return m_pos;
}
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