1 files changed, 18 insertions, 0 deletions
diff --git a/flower/interval.cc b/flower/interval.cc
new file mode 100644
index 0000000000..b307f4c634
--- /dev/null
+++ b/flower/interval.cc
@@ -0,0 +1,18 @@
+#include <assert.h> 
+#include "interval.hh"
+#include <math.h>
+
+const Real INFTY = HUGE;
+
+void
+Interval::set_empty() {
+    min = INFTY;
+    max = -INFTY;
+}
+
+Real
+Interval::length() const {
+    assert(max >= min);
+    return max-min;
+}
+