Frametime-independent dynamics.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/interface.cpp b/src/interface.cpp
index 11e297e..3a6a294 100644
--- a/src/interface.cpp
+++ b/src/interface.cpp
@@ -15,7 +15,7 @@ static sf::Vector2f compute_pan(sf::RenderWindow *window, sf::Vector2f pan_ref)
 	return -(vmouse - pan_ref);
 }
 
-void state_t::tick(void)
+void state_t::tick(double dt)
 {
 	sf::Vector2u size;
 	sf::Event event;
@@ -24,7 +24,7 @@ void state_t::tick(void)
 
 	size = window->getSize();
 
-	camera.zoom = (camera.zoom + camera.target_zoom) / 2;
+	camera.zoom = expfade(camera.zoom, camera.target_zoom, 15, dt);
 
 	{
 		float view_scale;