//#define DEBUG
//#define CHECKS
+#define SPLAY
typedef enum {DIR_UP, DIR_DOWN} segment_dir_t;
typedef enum {EVENT_CROSS, EVENT_END, EVENT_CORNER, EVENT_START, EVENT_HORIZONTAL} eventtype_t;
point_t a;
point_t b;
fillstyle_t*style;
+#ifdef DEBUG
int tmp;
+#endif
struct _edge *next;
} edge_t;
fillstyle_t* (*diff)(windstate_t*left, windstate_t*right);
} windrule_t;
+#define SEGNR(s) ((s)?(s)->nr:-1)
+
typedef struct _segment {
point_t a;
point_t b;
windstate_t wind;
int nr;
+#ifdef SPLAY
+ struct _segment*parent;
+ struct _segment*leftchild;
+ struct _segment*rightchild;
+#endif
struct _segment*left;
struct _segment*right;
char changed;
#define XPOS_INT(s,ypos) ((int)ceil(XPOS((s),ypos)))
#define XDIFF(s1,s2,ypos) (((s1)->k + (double)(s1)->delta.x*ypos)*(s2)->delta.y - \
- ((s2)->k + (double)(s1)->delta.x*ypos)*(s1)->delta.y)
-
-// rewrite as XDIFF==0?
-#define XPOS_EQ(s1,s2,ypos) (XPOS((s1),(ypos))==XPOS((s2),(ypos)))
+ ((s2)->k + (double)(s2)->delta.x*ypos)*(s1)->delta.y)
typedef struct _gfxpoly {
double gridsize;