ptrude/: path extrusion, work in progress

ptrude/path.h

@@ -0,0 +1,28 @@
+#ifndef PATH_H
+#define PATH_H
+
+#include <stdio.h>
+
+
+struct vertex {
+	double x, y;
+	double r;	/* minimum bend radius; 0 = use previous value */
+	double d;	/* max. distance of corner from ideal arc; 0 = prev */
+	const char *tag;
+	struct vertex *next;
+};
+
+struct path {
+	struct vertex *vertices;
+	struct vertex **last;
+};
+
+
+void free_path(struct path *path);
+
+struct path *round_path(const struct path *path, double r, double d);
+
+struct path *load_path(FILE *file);
+void save_path(FILE *file, const struct path *path);
+
+#endif /* !PATH_H */