From 7e213690c8a084398efdb763bc1503e45b2bb73f Mon Sep 17 00:00:00 2001
From: RHY3756547 <rhy3756547@hotmail.com>
Date: Fri, 8 Sep 2017 17:17:00 +0100
Subject: [PATCH] netKart

---
 code/formats/net/netKart.js | 113 ++++++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 code/formats/net/netKart.js

diff --git a/code/formats/net/netKart.js b/code/formats/net/netKart.js
new file mode 100644
index 0000000..6e50af1
--- /dev/null
+++ b/code/formats/net/netKart.js
@@ -0,0 +1,113 @@
+//
+// netKart.js
+//--------------------
+// Singleton for serializing and restoring kart data.
+// by RHY3756547
+//
+// includes: gl-matrix.js (glMatrix 2.0)
+// /entities/kart.js
+//
+
+window.netKart = new function() {
+	var animNames = ["drive", "win", "lose", "spin"]
+	this.saveKart = saveKart;
+	this.restoreKart = restoreKart;
+
+	function saveKart(view, off, k, input) { // requires 0x60 bytes of space from the offset location
+		saveVec3(view, off, k.pos);
+		saveVec3(view, off+0xC, k.vel);
+		view.setFloat32(off+0x18, k.angle, true);
+		view.setFloat32(off+0x1C, k.physicalDir, true);
+		view.setFloat32(off+0x20, k.driftOff, true);
+		if (k.cannon != null) view.setUint16(off+0x24, k.cannon, true);
+		else view.setUint16(off+0x24, 0xFFFF, true);
+
+		view.setUint16(off+0x26, k.airTime, true);
+		view.setUint16(off+0x28, k.lastCollided, true);
+
+		view.setUint8(off+0x2A, k.boostMT);
+		view.setUint8(off+0x2B, k.boostNorm);
+
+		view.setUint16(off+0x2C, k.stuckTo, true);
+		view.setUint8(off+0x2E, k.wheelTurn);
+
+		saveVec3(view, off+0x30, k.kartColVel);
+		view.setUint8(off+0x3C, k.kartColTimer);
+
+		saveVec3(view, off+0x3D, k.kartTargetNormal);
+		saveVec3(view, off+0x49, k.trackAttach);
+
+		var driftFlags = ((k.drifting)?1:0)|(k.driftMode<<1)|((k.driftLanded)?8:0);
+		view.setUint8(off+0x55, driftFlags);
+
+		view.setUint8(off+0x56, animNames.indexOf(k.animMode));
+
+		var binput = ((input.accel)?1:0)|((input.decel)?2:0)|((input.drift)?4:0);
+		view.setUint8(off+0x57, binput);
+
+		view.setFloat32(off+0x58, input.turn, true);
+		view.setFloat32(off+0x5C, input.airTurn, true);		
+	}
+
+	function restoreKart(view, off, k) { // we use the same endianness format as the ds to avoid confusion.
+		try {
+			k.pos = readVec3(view, off, k.pos);
+			k.vel = readVec3(view, off+0xC, k.vel);
+			k.angle = view.getFloat32(off+0x18, true);
+			k.physicalDir = view.getFloat32(off+0x1C, true);
+			k.driftOff = view.getFloat32(off+0x20, true);
+			k.cannon = view.getUint16(off+0x24, true);
+			if (k.cannon == 0xFFFF) k.cannon = null;
+
+			k.airTime = view.getUint16(off+0x26, true);
+			k.lastCollided = view.getUint16(off+0x28, true);
+
+			k.boostMT = view.getUint8(off+0x2A);
+			k.boostNorm = view.getUint8(off+0x2B);
+
+			k.stuckTo = view.getUint16(off+0x2C, true);
+			k.wheelTurn = view.getUint8(off+0x2E);
+
+			k.kartColVel = readVec3(view, off+0x30, k.kartColVel);
+			k.kartColTimer = view.getUint8(off+0x3C);
+
+			k.kartTargetNormal = readVec3(view, off+0x3D, k.kartTargetNormal);
+			k.trackAttach = readVec3(view, off+0x49, k.trackAttach);
+
+			var driftFlags = view.getUint8(off+0x55);
+
+			k.drifting = driftFlags&1;
+			k.driftMode = (driftFlags>>1)&3;
+			k.driftLanded = driftFlags&8;
+
+			k.animMode = animNames[view.getUint8(off+0x56)];
+
+			k.controller.binput = view.getUint8(off+0x57);
+
+			k.controller.turn = view.getFloat32(off+0x58, true);
+			k.controller.airTurn = view.getFloat32(off+0x5C, true);
+
+		} catch (err) {
+			console.err("Kart restore failure:"+err.message);
+			//failed to restore kart data. may wish to disconnect on this, but it's probably better to not react.
+		}
+	}
+
+	function saveVec3(view, off, vec) { 
+		var vec = vec;
+		if (vec == null) vec = [NaN, NaN, NaN];
+		view.setFloat32(off, vec[0], true);
+		view.setFloat32(off+4, vec[1], true);
+		view.setFloat32(off+8, vec[2], true);
+	}
+
+	function readVec3(view, off, vec) { 
+		var first = view.getFloat32(off, true);
+		if (isNaN(first)) return null;
+		vec = vec3.create();
+		vec[0] = first;
+		vec[1] = view.getFloat32(off+4, true);
+		vec[2] = view.getFloat32(off+8, true);
+		return vec;
+	}
+}
\ No newline at end of file