add support for marble attribute changing

src/Marble.hx

@@ -1,5 +1,6 @@
 package src;
 
+import mis.MisParser;
 import gui.MarblePickerGui;
 import collision.CollisionPool;
 import net.NetPacket.MarbleNetFlags;
@@ -564,6 +565,8 @@ class Marble extends GameObject {
 			this.helicopter.z = 1e8;
 			this.helicopter.scale(0.3 / 0.2);
 
+			loadMarbleAttributes();
+
 			if (this.controllable || this.connection != null) {
 				var worker = new ResourceLoaderWorker(onFinish);
 				worker.addTask(fwd -> level.addDtsObject(this.helicopter, fwd));
@@ -654,6 +657,36 @@ class Marble extends GameObject {
 		shadowVolume.material.removePass(shadowVolume.material.mainPass);
 	}
 
+	function loadMarbleAttributes() {
+		var attribs = this.level.mission.marbleAttributes;
+		if (attribs.exists("maxrollvelocity"))
+			this._maxRollVelocity = MisParser.parseNumber(attribs.get("maxrollvelocity"));
+		if (attribs.exists("angularacceleration"))
+			this._angularAcceleration = MisParser.parseNumber(attribs.get("angularacceleration"));
+		if (attribs.exists("jumpimpulse"))
+			this._jumpImpulse = MisParser.parseNumber(attribs.get("jumpimpulse"));
+		if (attribs.exists("kineticfriction"))
+			this._kineticFriction = MisParser.parseNumber(attribs.get("kineticfriction"));
+		if (attribs.exists("staticfriction"))
+			this._staticFriction = MisParser.parseNumber(attribs.get("staticfriction"));
+		if (attribs.exists("brakingacceleration"))
+			this._brakingAcceleration = MisParser.parseNumber(attribs.get("brakingacceleration"));
+		if (attribs.exists("gravity"))
+			this._gravity = MisParser.parseNumber(attribs.get("gravity"));
+		if (attribs.exists("airaccel"))
+			this._airAccel = MisParser.parseNumber(attribs.get("airaccel"));
+		if (attribs.exists("maxdotslide"))
+			this._maxDotSlide = MisParser.parseNumber(attribs.get("maxdotslide"));
+		if (attribs.exists("minbouncevel"))
+			this._minBounceVel = MisParser.parseNumber(attribs.get("minbouncevel"));
+		if (attribs.exists("minbouncespeed"))
+			this._minBounceSpeed = MisParser.parseNumber(attribs.get("minbouncespeed"));
+		if (attribs.exists("mintrailvel"))
+			this._minTrailVel = MisParser.parseNumber(attribs.get("mintrailvel"));
+		if (attribs.exists("bouncekineticfriction"))
+			this._bounceKineticFriction = MisParser.parseNumber(attribs.get("bouncekineticfriction"));
+	}
+
 	function findContacts(collisionWorld:CollisionWorld, timeState:TimeState) {
 		this.contacts = queuedContacts;
 		CollisionPool.clear();

src/Mission.hx

@@ -40,6 +40,7 @@ class Mission {
 	public var game:String;
 	public var hasEgg:Bool;
 	public var isCustom:Bool;
+	public var marbleAttributes:Map<String, String>;
 
 	var next:Mission;
 
@@ -64,6 +65,7 @@ class Mission {
 		var misParser = new MisParser(misText);
 		var contents = misParser.parse();
 		root = contents.root;
+		marbleAttributes = contents.marbleAttributes;
 
 		function scanMission(simGroup:MissionElementSimGroup) {
 			for (element in simGroup.elements) {

src/mis/MisParser.hx

@@ -88,7 +88,7 @@ class MisParser {
 		startText = outsideText;
 
 		while (marbleAttributesRegEx.match(startText)) {
-			marbleAttributes.set(marbleAttributesRegEx.matched(1), this.resolveExpression(marbleAttributesRegEx.matched(2)));
+			marbleAttributes.set(marbleAttributesRegEx.matched(1).toLowerCase(), this.resolveExpression(marbleAttributesRegEx.matched(2)));
 			startText = marbleAttributesRegEx.matchedRight();
 		}