1 files changed, 4 insertions, 0 deletions
diff --git a/app.cpp b/app.cpp
index 95f730b..0f57a71 100644
--- a/app.cpp
+++ b/app.cpp
@@ -515,6 +515,7 @@ int WinMain(
 #endif
 
 void App::init(const char* name) {
+	dt = 0.0f;
 	internal = (App_Internal*)arena_alloc(
 		arena,
 		sizeof *internal
@@ -536,6 +537,7 @@ void App::destroy() {
 
 void App::begin() {
 	int j;
+	begin_t = get_time();
 	for (j = 0; j < key_count; j++)
 		key_states[j] &= ~(
 			key_state_just_pressed | key_state_just_released
@@ -548,6 +550,8 @@ void App::begin() {
 }
 
 void App::end() {
+	end_t = get_time();
+	dt = (float)((double)(end_t - begin_t) / 1000000000.0);
 	internal->end(this);
 }