From 3ee74cdb1b4fd2bf9eefdf6bcd8439b27cbb7336 Mon Sep 17 00:00:00 2001
From: cflip <cflip@cflip.net>
Date: Fri, 1 Apr 2022 21:23:01 -0600
Subject: Add a game timer

This adds a delta time that ensures that everything moves at the same
speed regardless of framerate or system.
---
 src/main.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'src/main.cpp')

diff --git a/src/main.cpp b/src/main.cpp
index 25e6fea..b417b45 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -5,6 +5,7 @@
 #include "window.h"
 
 #include <SDL_keycode.h>
+#include <chrono>
 
 int main(int argc, char** argv)
 {
@@ -107,7 +108,12 @@ int main(int argc, char** argv)
 		}
 	});
 
+	auto lastTime = std::chrono::high_resolution_clock::now();
 	while (!window.shouldClose()) {
+		auto now = std::chrono::high_resolution_clock::now();
+		float deltaTime = std::chrono::duration_cast<std::chrono::duration<float>>(now - lastTime).count() * 100;
+		lastTime = now;
+
 		window.update();
 		bitmap.clear(0xff224466);
 
@@ -116,7 +122,7 @@ int main(int argc, char** argv)
 		if (left) xOffs -= cameraMoveSpeed;
 		if (right) xOffs += cameraMoveSpeed;
 
-		level.update();
+		level.update(deltaTime);
 		level.draw(bitmap, xOffs, yOffs);
 
 		int xx = (hoveredTile.x - hoveredTile.y) * (TileSize / 2) - xOffs;
-- 
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