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-rw-r--r--src/bltGrElemOp.C3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/bltGrElemOp.C b/src/bltGrElemOp.C
index ab56db2..01444e4 100644
--- a/src/bltGrElemOp.C
+++ b/src/bltGrElemOp.C
@@ -46,6 +46,9 @@ extern "C" {
#define ELEM_SOURCE_VALUES 0
#define ELEM_SOURCE_VECTOR 1
+#define SetRange(l) ((l).range = ((l).max > (l).min) ? ((l).max - (l).min) : DBL_EPSILON)
+#define SetWeight(l, lo, hi) ((l).min = (lo), (l).max = (hi), SetRange(l))
+
// Defs
extern int Blt_GetPenFromObj(Tcl_Interp* interp, Graph* graphPtr,