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/*
* File: ray.h
* Summary: Ray definition
* Written by: Linley Henzell
*/
#ifndef RAY_H
#define RAY_H
// quadrant
enum quad_type
{
QUAD_SE = 0,
QUAD_SW = 1,
QUAD_NW = 2,
QUAD_NE = 3
};
// direction of advance:
enum adv_type
{
ADV_X = 0, // changed x
ADV_Y = 1, // changed y
ADV_XY = 2 // changed x and y (diagonal)
};
struct ray_def
{
public:
double accx;
double accy;
double slope;
quad_type quadrant;
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,
quad_type quadrant = QUAD_SE, int fullray_idx = -1);
int x() const;
int y() const;
coord_def pos() const;
// returns the direction taken
adv_type advance(bool shorten = false, const coord_def *p = NULL);
adv_type 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);
protected:
adv_type raw_advance_0();
void flip();
adv_type 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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