can rotate but does not normalise

[moebius2.git] / common.c

diff --git a/common.c b/common.c
index 146e5d54ef44a3f6fd9fc3f9879d1bc5d1fc7c34..ba61341dc9bc45c457feba0ba87b112190df3c6a 100644 (file)
--- a/common.c
+++ b/common.c
@@ -4,15 +4,15 @@
 
 #include "common.h"
 
-double hypotD1(const double pq[D3]) {
+double magnD(const double pq[D3]) {
   gsl_vector v;
 
   v.size= D3;
   v.stride= 1;
-  v.vector.data= pq;
+  v.data= (double*)pq;
   /* owner and block ought not to be used */
 
-  return gsl_blas_snrm2(&v);
+  return gsl_blas_dnrm2(&v);
 }
 
 double hypotD(const double p[D3], const double q[D3]) {
@@ -20,22 +20,38 @@ double hypotD(const double p[D3], const double q[D3]) {
   double pq[D3];
 
   K pq[k]= p[k] - q[k];
-  return hypotD1(pq);
+  return magnD(pq);
 }
 
 double hypotD2(const double p[D3], const double q[D3]) {
+  int k;
   double d2= 0;
+  
   K d2= ffsqa(p[k] - q[k], d2);
   return d2;
 }
 
 double hypotD2plus(const double p[D3], const double q[D3], double d2) {
+  int k;
   K d2= ffsqa(p[k] - q[k], d2);
   return d2;
 }
 
 void xprod(double r[D3], const double a[D3], const double b[D3]) {
-  r[0]= a[1]*b[2] - a[2]*b[1]);
-  r[1]= a[2]*b[0] - a[0]*b[2]);
-  r[2]= a[0]*b[1] - a[1]*b[0]);
+  r[0]= a[1]*b[2] - a[2]*b[1];
+  r[1]= a[2]*b[0] - a[0]*b[2];
+  r[2]= a[0]*b[1] - a[1]*b[0];
+}
+
+void libdie(const char *lib, int l, const char *str) {
+  fprintf(stderr,"%s library call failed, line %d: %s\n", lib, l, str);
 }
+
+void gsldie(int l, const char *what, int status) {
+  fprintf(stderr,"gsl function failed, line %d: %s: %s\n",
+         l, what, gsl_strerror(status));
+  exit(-1);
+}
+
+void diee(const char *what) { perror(what); exit(16); }
+void flushoutput(void) { if (fflush(stdout)||ferror(stdout)) diee("stdout"); }