From cdd75000effac0216588766234cfa5b3e8e304d5 Mon Sep 17 00:00:00 2001
From: Paweł Redman <pawel.redman@gmail.com>
Date: Wed, 8 Nov 2017 12:26:43 +0100
Subject: Frametime-independent dynamics.

---
 src/main.cpp | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

(limited to 'src/main.cpp')

diff --git a/src/main.cpp b/src/main.cpp
index 1059cb6..f6a2de5 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -20,6 +20,8 @@ int main()
 	render::state_t render(&window);
 	game::state_t game;
 	interface::state_t interface(&window, &game);
+	size_t frame = 0;
+	double before = NAN;
 
 	window.setVerticalSyncEnabled(false);
 
@@ -29,21 +31,28 @@ int main()
 	game.start();
 
 	while (1) {
-		double now = (nano_clock() - t0) * 1.0e-9;
+		double now = (nano_clock() - t0) * 1.0e-9, dt;
 
-		game.tick(now);
-		interface.tick();
+		if (frame)
+			dt = now - before;
+		else
+			dt = 0.01;
+
+		game.tick(now, dt);
+		interface.tick(dt);
 		if (!window.isOpen())
 			break;
 
 		window.clear();
-		render.begin_frame(now);
+		render.begin_frame(now, dt);
 		render.render(&game);
 		interface.render_to(&render);
 		render.end_frame();
+
+		before = now;
+		frame++;
 	}
 
 	game.stop();
-
 	return 0;
 }
-- 
cgit