typedef union {
	int i;
	unsigned int u;
	float f;
	const void *v;
	const char *s;
} Arg;

typedef struct {
	float x, y, z;
} Point;

typedef struct {
	Point pos;
	float azim, rad;
} Camera;

typedef struct {
	Point p[3];
	unsigned int col;
} Triangle;

extern Camera cam;
extern float hfov, vfov;
extern void *ren;