ptrude/: changed extrusion from xy path to xz path; variable number of faces

ptrude/extrude.h

@@ -0,0 +1,26 @@
+/*
+ * extrude.h - Perform the extrusion
+ *
+ * Written 2011 by Werner Almesberger
+ * Copyright 2011 by Werner Almesberger
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef EXTRUDE_H
+#define	EXTRUDE_H
+
+struct point {
+	double x, y, z;
+};
+
+
+void extrude(const struct path *path, const struct path *shape,
+    double r, double d,
+    void (*face)(void *data, struct point a, struct point b, struct point c),
+    void *data);
+
+#endif /* !EXTRUDE_H */