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/*
* File: ray.h
* Summary: Ray definition
* Written by: Linley Henzell
*/
#ifndef RAY_H
#define RAY_H
int shoot_ray(double accx, double accy, const double slope,
int maxrange, int xpos[], int ypos[]);
struct ray_def
{
public:
double accx;
double accy;
double slope;
int quadrant; // 0 down-right, 1 down-left, 2 up-left, 3 up-right
int fullray_idx; // for cycling: where did we come from?
public:
ray_def(double accx = 0.0, double accy = 0.0, double slope = 0.0,
int quadrant = 0, int fullray_idx = -1);
int x() const;
int y() const;
coord_def pos() const;
// returns the direction taken (0,1,2)
int advance(bool shorten = false, const coord_def *p = NULL);
int advance_through(const coord_def &point);
void advance_and_bounce();
void regress();
int footprint(int radius2, coord_def pos[]) const;
// Gets/sets the slope in terms of degrees, with 0 = east, 90 = north,
// 180 = west, 270 = south, 360 = east, -90 = south, etc
double get_degrees() const;
void set_degrees(double deg);
private:
int _find_next_intercept();
int raw_advance();
double reflect(bool x, double oldc, double newc) const;
void set_reflect_point(const double oldx, const double oldy,
bool blocked_x, bool blocked_y);
};
#endif
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