Add a module for adaptive step control.

1 files changed, 1 insertions, 0 deletions

diff --git a/common.h b/common.h
index 9c36a33..d6f55f0 100644
--- a/common.h
+++ b/common.h
@@ -22,6 +22,7 @@
 #define SGN(x) ((x) >= 0.0 ? 1.0 : -1.0)
 #define MAX(x, y) ((x) > (y) ? (x) : (y))
 #define MIN(x, y) ((x) > (y) ? (y) : (x))
+#define CLIP(val, min, max) (MIN(MAX(val, min), max))
 #define ARRAY_ELEMS(arr) (sizeof(arr) / sizeof(*arr))
 
 #include <stdio.h>