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-rw-r--r--src/core/common.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/core/common.h b/src/core/common.h
index 7b4ff4a0..b58b93af 100644
--- a/src/core/common.h
+++ b/src/core/common.h
@@ -215,6 +215,7 @@ void re3_assert(const char *expr, const char *filename, unsigned int lineno, con
#define ABS(a) (((a) < 0) ? (-(a)) : (a))
#define norm(value, min, max) (((value) < (min)) ? 0 : (((value) > (max)) ? 1 : (((value) - (min)) / ((max) - (min)))))
+#define lerp(norm, min, max) ( (norm) * ((max) - (min)) + (min) )
#define STRINGIFY(x) #x
#define STR(x) STRINGIFY(x)