*shader and time

1 files changed, 19 insertions, 0 deletions

diff --git a/src/libjin/time/je_timer.h b/src/libjin/time/je_timer.h
index 1209827..95c1925 100644
--- a/src/libjin/time/je_timer.h
+++ b/src/libjin/time/je_timer.h
@@ -131,6 +131,25 @@ namespace JinEngine
         #endif
         }
 
+        ///
+        /// Delta time between frames.
+        ///
+        extern float deltaTime;
+
+        inline void step()
+        {
+            static float previous = 0;
+            static float current = getSecond();
+            previous = current;
+            current = getSecond();
+            deltaTime = current - previous;
+        }
+
+        inline float getDeltaTime()
+        {
+            return deltaTime;
+        }
+
     } // namespace Time
 } // namespace JinEngine