From 36097212c07ba98c9ecade40195c677211010e46 Mon Sep 17 00:00:00 2001
From: Tom Smeding <tom.smeding@gmail.com>
Date: Mon, 25 Jun 2018 14:56:49 +0200
Subject: Better keydown/keyup handling

---
 game.js | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/game.js b/game.js
index a2d5552..fa8ff23 100644
--- a/game.js
+++ b/game.js
@@ -244,22 +244,23 @@ function advancePhysics(deltaT) {
 }
 
 function setupBindings() {
+	var up = false, down = false;
+
+	function padUpdate() {
+		padVel = (down - up) * padBaseSpeed;
+		socket.emit("padvec", padPos, padVel);
+	}
+
 	window.addEventListener("keydown", function(ev) {
-		if (ev.key == "w" || ev.key == "ArrowUp") {
-			padVel = -padBaseSpeed;
-			socket.emit("padvec", padPos, padVel);
-		} else if (ev.key == "s" || ev.key == "ArrowDown") {
-			padVel = padBaseSpeed;
-			socket.emit("padvec", padPos, padVel);
-		}
+		if (ev.key == "w" || ev.key == "ArrowUp") up = true;
+		else if (ev.key == "s" || ev.key == "ArrowDown") down = true;
+		padUpdate();
 	});
 
 	window.addEventListener("keyup", function(ev) {
-		if (ev.key == "w" || ev.key == "ArrowUp" ||
-					ev.key == "s" || ev.key == "ArrowDown") {
-			padVel = 0;
-			socket.emit("padvec", padPos, padVel);
-		}
+		if (ev.key == "w" || ev.key == "ArrowUp") up = false;
+		else if (ev.key == "s" || ev.key == "ArrowDown") down = false;
+		padUpdate();
 	});
 }
 
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