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-rw-r--r--src/refine.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/refine.c b/src/refine.c
index 20fc431..5d1b59a 100644
--- a/src/refine.c
+++ b/src/refine.c
@@ -272,7 +272,8 @@ double refine_do_cell(ControlContext *ctx) {
rf->partner->x = old_x;
rf->partner->y = old_y;
#if REFINE_DEBUG
- printf("=> %+10.5f %+10.5f nm^-1\n", dx/DISPFACTOR, dy/DISPFACTOR);
+ double mod = sqrt(dx*dx + dy*dy)/DISPFACTOR;
+ printf("=> %+10.5f %+10.5f nm^-1 (length %10.5f nm^1)\n", dx/DISPFACTOR, dy/DISPFACTOR, mod);
#endif /* REFINE_DEBUG */
d[f].dx = dx;