done circumcircle but it doesn't work so well

[moebius2.git] / common.c

diff --git a/common.c b/common.c
index 32701815aa753bcd1e43a4e71ee5d1cd1c43214b..cc72ed3341dfd9f8c2f56cf82259e7fcaf3a899d 100644 (file)
--- a/common.c
+++ b/common.c
@@ -51,12 +51,16 @@ void xprod(double r[D3], const double a[D3], const double b[D3]) {
   r[2]= a[0]*b[1] - a[1]*b[0];
 }
 
-void xprod_norm(double r[D3], const double a[D3], const double b[D3],
-               double absepsilon, double one) {
+void normalise(double v[D3], double one, double absepsilon) {
   int k;
+  double multby= one/(magnD(v) + absepsilon);
+  K v[k] *= multby;
+}
+
+void xprod_norm(double r[D3], const double a[D3], const double b[D3],
+               double one, double absepsilon) {
   xprod(r,a,b);
-  double multby= one/(magnD(r) + absepsilon);
-  K r[k] *= multby;
+  normalise(r, absepsilon, one);
 }
 
 double dotprod(const double a[D3], const double b[D3]) {