From ed5f9128c1da9f1888c17e9f5e9de4cd6971290e Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Sun, 8 Aug 2021 13:12:51 +0200
Subject: Naively implemented Timeline

---
 derelict.js | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/derelict.js b/derelict.js
index 4be97ef..0e629b9 100644
--- a/derelict.js
+++ b/derelict.js
@@ -10,23 +10,29 @@ const GRID_EXTENT = 100 * SCALE
 class Timeline {
 	start
 	finish
-	current = 0
+	current
 
 	simple_list = []
 
 	register(wreck) {
-		// TODO: Consider expiration right away
-		if (this.start === undefined || wreck.timestamp < this.start)
-			this.start = wreck.timestamp
-		if (this.finish === undefined || wreck.timestamp > this.finish)
-			this.finish = wreck.timestamp
+		if (this.start === undefined || wreck.timestamp - EXPIRY < this.start) {
+			this.start = wreck.timestamp - EXPIRY
+			if (this.current === undefined || this.current == this.start)
+				this.current = this.start
+		}
+		if (this.finish === undefined || wreck.timestamp + EXPIRY > this.finish)
+			this.finish = wreck.timestamp + EXPIRY
 		// TODO: Implement more reliable and optimized data structure for timeline.
 		this.simple_list.push(wreck)
 	}
 
-	setTo(time) {}  // TODO: Implement
-	moveForward(time) {}  // TODO: Implement
-	moveBackward(time) {}  // TODO: Implement
+	update() {
+		this.simple_list.forEach(wreck => wreck.toggleKilled(this.current))
+	}
+
+	setTo(time) {
+		this.current = time
+	}
 }
 
 class Grid {
-- 
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