struct _edge *next;
} edge_t;
+typedef struct _windstate
+{
+ char is_filled;
+ int wind_nr;
+ int num_polygons;
+} windstate_t;
+
+typedef struct _windrule
+{
+ windstate_t (*start)(int num_polygons);
+ windstate_t (*add)(windstate_t left, fillstyle_t*edge, segment_dir_t dir, int polygon_nr);
+ fillstyle_t* (*diff)(windstate_t*left, windstate_t*right);
+} windrule_t;
+
typedef struct _segment {
point_t a;
point_t b;
double k; //k = a.x*b.y-a.y*b.x = delta.y*a.x - delta.x*a.y (=0 for points on the segment)
segment_dir_t dir;
- fillstyle_t*style;
-
+ fillstyle_t*fs;
+ fillstyle_t*fs_out;
+ char fs_out_ok;
+
+ int polygon_nr;
+ windstate_t wind;
int nr;
+
struct _segment*left;
struct _segment*right;
point_t pos;
- point_t new_point;
- point_t new_pos;
dict_t scheduled_crossings;
} segment_t;
#define LINE_EQ(p,s) ((double)(s)->delta.y*(p).x - (double)(s)->delta.x*(p).y - (s)->k)
#define XPOS(s,ypos) ((s)->a.x + ceil(((s)->delta.x * (double)((ypos) - (s)->a.y)) / (s)->delta.y))
-typedef edge_t gfxpoly_t;
-gfxpoly_t* gfxpoly_new();
+typedef struct _gfxpoly {
+ double gridsize;
+ edge_t*edges;
+} gfxpoly_t;
+
+gfxpoly_t* gfxpoly_new(double gridsize);
+char gfxpoly_check(gfxpoly_t*poly);
void gfxpoly_dump(gfxpoly_t*poly);
-gfxpoly_t* gfxpoly_process(gfxpoly_t*poly);
+gfxpoly_t* gfxpoly_process(gfxpoly_t*poly, windrule_t*windrule);
typedef struct _event {
eventtype_t type;
segment_t*s2;
} event_t;
-void segment_init(segment_t*s, int32_t x1, int32_t y1, int32_t x2, int32_t y2);
-segment_t*segment_new(int32_t x1, int32_t y1, int32_t x2, int32_t y2);
-void segment_insert_before(segment_t**list, segment_t*add);
-
#endif