From e22b9d4535f34e9dabfbf15fa0c847ac4f4c3887 Mon Sep 17 00:00:00 2001
From: BKcore <thibaut.despoulain@bkcore.com>
Date: Mon, 15 Oct 2012 17:58:19 +0200
Subject: [PATCH] Added bkcore.hexgl.RaceData class to store ship states.

---
 bkcore/hexgl/RaceData.js | 72 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 bkcore/hexgl/RaceData.js

diff --git a/bkcore/hexgl/RaceData.js b/bkcore/hexgl/RaceData.js
new file mode 100644
index 0000000..a32cefe
--- /dev/null
+++ b/bkcore/hexgl/RaceData.js
@@ -0,0 +1,72 @@
+ /*
+ * HexGL
+ * @author Thibaut 'BKcore' Despoulain <http://bkcore.com>
+ * @license This work is licensed under the Creative Commons Attribution-NonCommercial 3.0 Unported License. 
+ *          To view a copy of this license, visit http://creativecommons.org/licenses/by-nc/3.0/.
+ */
+
+var bkcore = bkcore || {};
+bkcore.hexgl = bkcore.hexgl || {};
+
+bkcore.hexgl.RaceData = function(track, mode, shipControls)
+{
+	this.track = track;
+	this.mode = mode;
+	this.shipControls = shipControls;
+
+	this.data = [];
+	this.last = 0;
+	this.seek = 0;
+
+	this._p = new THREE.Vector3();
+	this._q = new THREE.Quaternion();
+}
+
+bkcore.hexgl.RaceData.prototype.load = function(data)
+{
+	this.data = data;
+	this.last = data.length - 1;
+}
+
+bkcore.hexgl.RaceData.prototype.tick = function(time)
+{
+	this.data.push(new bkcore.hexgl.RaceTick(
+		time,
+		this.shipControls.getPosition(),
+		this.shipControls.getQuaternion()
+	));
+	++this.last;
+}
+
+bkcore.hexgl.RaceData.prototype.applyInterpolated = function(time)
+{
+	while(this.seek < this.last && this.data[this.seek+1].time < time)
+		++this.seek;
+
+	var prev = this.data[this.seek];
+
+	// no interpolation
+	if(this.seek == this.last && time >= prev.time
+		|| this.seek == 0)
+		this.apply(prev.position, prev.quaternion);
+
+	// interpolation
+	var next = this.data[this.seek+1];
+	var t = (time-prev.time) / (next.time-prev.time);
+	this._p.copy(prev.position).lerpSelf(next.position, t);
+	this._q.copy(prev.quaternion).slerpSelf(next.quaternion, t);
+	
+	this.shipControls.teleport(this._p, this._q);
+}
+
+bkcore.hexgl.RaceData.prototype.reset = function()
+{
+	this.seek = 0;
+}
+
+bkcore.hexgl.RaceTick = function(time, position, quaternion)
+{
+	this.time = time;
+	this.position = position;
+	this.quaternion = quaternion;
+}
\ No newline at end of file