added comment.

diff --git a/lib/drawer.c b/lib/drawer.c
index 1b4f7e9..bf8f5cd 100644 (file)
--- a/lib/drawer.c
+++ b/lib/drawer.c
@@ -236,6 +236,9 @@ static int approximate3(const struct cspline*s, struct qspline*q, int size, doub
 
        /* convert control point representation to 
           d*x^3 + c*x^2 + b*x + a */
+
+       /* FIXME: we need to do this for the subspline between [start,end],
+          not [0,1] */
        dx= s->end.x  - s->control2.x*3 + s->control1.x*3 - s->start.x;
        dy= s->end.y  - s->control2.y*3 + s->control1.y*3 - s->start.y;