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#ifndef VIEWPOINT_H
#define VIEWPOINT_H
#include "vector.h"
// 100 degrees
#define FOV 1.74533
typedef struct {
// Viewpoint dimensions
unsigned int width;
unsigned int height;
// Position and orientation
vector_t position, target;
// Viewpoint shift vectors
// Calculated at initialisation
vector_t qx, qy;
// Left button center pixel location
vector_t blc;
} viewpoint_t;
// Todo handle initial setup
void viewpoint_init(viewpoint_t *view);
void viewpoint_ray(viewpoint_t *view, vector_t *r, unsigned x, unsigned y);
#endif
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