PraseTja: Add branches

- Needs the following changes to the database: change `easy`, `normal`, `hard`, and `oni` to `TEXT` type
- When adding songs to the database and if, for example, a song's 7-star difficulty has a branch, instead of `7` input `7 B`, this is to display song's branch support on the song selection
- Branch can be forced in debug

public/src/css/debug.css

@@ -44,7 +44,8 @@
 	box-sizing: border-box;
 }
 
-#debug .input-slider{
+#debug .input-slider,
+#debug .select{
 	display: flex;
 	width: 100%;
 	height: 30px;
@@ -59,7 +60,8 @@
 	padding: 2px 4px;
 	text-align: center;
 }
-#debug .input-slider>span{
+#debug .input-slider>span,
+#debug .select>span{
 	display: block;
 	width: 10%;
 	height: 100%;
@@ -70,10 +72,19 @@
 	line-height: 2em;
 	cursor: pointer;
 }
-#debug .input-slider>span:hover{
+#debug .input-slider>span:hover,
+#debug .select>span:hover{
 	opacity: 1;
 	background: #333;
 }
+#debug .select select{
+	width: 90%;
+	height: 100%;
+	box-sizing: border-box;
+	font-size: 18px;
+	font-family: sans-serif;
+	padding: 2px 4px;
+}
 
 #debug label{
 	display: block;
@@ -111,6 +122,7 @@
 	margin-left: 3px;
 }
 
-#debug .autoplay-label{
+#debug .autoplay-label,
+#debug .branch-hide{
 	display: none;
 }

public/src/js/canvasdraw.js

@@ -1167,6 +1167,7 @@
 		var firstTop = config.multiplayer ? 0 : 30
 		var secondTop = config.multiplayer ? 0 : 8
 		
+		config.percentage = Math.max(0, Math.min(1, config.percentage))
 		var cleared = config.percentage - 1 / 50 >= config.clear
 		
 		var gaugeW = 14 * 50

public/src/js/circle.js

@@ -1,6 +1,5 @@
 class Circle{
 	constructor(config){
-		// id, ms, type, text, speed, endTime, requiredHits
 		this.id = config.id
 		this.ms = config.start
 		this.originalMS = this.ms
@@ -23,38 +22,13 @@ class Circle{
 		this.gogoChecked = false
 		this.beatMS = config.beatMS
 		this.fixedPos = config.fixedPos
-	}
-	getMS(){
-		return this.ms
-	}
-	getEndTime(){
-		return this.endTime
-	}
-	getType(){
-		return this.type
-	}
-	getLastFrame(){
-		return this.lastFrame
+		this.branch = config.branch
+		this.section = config.section
 	}
 	animate(ms){
 		this.animating = true
 		this.animT = ms
 	}
-	isAnimated(){
-		return this.animating
-	}
-	getAnimT(){
-		return this.animT
-	}
-	getPlayed(){
-		return this.isPlayed
-	}
-	isAnimationFinished(){
-		return this.animationEnded
-	}
-	endAnimation(){
-		this.animationEnded = true
-	}
 	played(score, big){
 		this.score = score
 		this.isPlayed = score <= 0 ? score - 1 : (big ? 2 : 1)
@@ -65,16 +39,4 @@ class Circle{
 			this.timesKa++
 		}
 	}
-	getScore(){
-		return this.score
-	}
-	getID(){
-		return this.id
-	}
-	getText(){
-		return this.text
-	}
-	getSpeed(){
-		return this.speed
-	}
 }

public/src/js/debug.js

@@ -8,15 +8,19 @@ class Debug{
 		this.debugDiv.innerHTML = assets.pages["debug"]
 		document.body.appendChild(this.debugDiv)
 		
-		this.titleDiv = this.debugDiv.getElementsByClassName("title")[0]
-		this.minimiseDiv = this.debugDiv.getElementsByClassName("minimise")[0]
-		this.offsetDiv = this.debugDiv.getElementsByClassName("offset")[0]
-		this.measureNumDiv = this.debugDiv.getElementsByClassName("measure-num")[0]
-		this.restartCheckbox = this.debugDiv.getElementsByClassName("change-restart")[0]
-		this.autoplayLabel = this.debugDiv.getElementsByClassName("autoplay-label")[0]
-		this.autoplayCheckbox = this.debugDiv.getElementsByClassName("autoplay")[0]
-		this.restartBtn = this.debugDiv.getElementsByClassName("restart-btn")[0]
-		this.exitBtn = this.debugDiv.getElementsByClassName("exit-btn")[0]
+		this.titleDiv = this.byClass("title")
+		this.minimiseDiv = this.byClass("minimise")
+		this.offsetDiv = this.byClass("offset")
+		this.measureNumDiv = this.byClass("measure-num")
+		this.branchHideDiv = this.byClass("branch-hide")
+		this.branchSelectDiv = this.byClass("branch-select")
+		this.branchSelect = this.branchSelectDiv.getElementsByTagName("select")[0]
+		this.branchResetBtn = this.branchSelectDiv.getElementsByClassName("reset")[0]
+		this.restartCheckbox = this.byClass("change-restart")
+		this.autoplayLabel = this.byClass("autoplay-label")
+		this.autoplayCheckbox = this.byClass("autoplay")
+		this.restartBtn = this.byClass("restart-btn")
+		this.exitBtn = this.byClass("exit-btn")
 		
 		this.moving = false
 		pageEvents.add(window, ["mousedown", "mouseup", "blur"], this.stopMove.bind(this))
@@ -26,6 +30,8 @@ class Debug{
 		pageEvents.add(this.restartBtn, "click", this.restartSong.bind(this))
 		pageEvents.add(this.exitBtn, "click", this.clean.bind(this))
 		pageEvents.add(this.autoplayCheckbox, "change", this.toggleAutoplay.bind(this))
+		pageEvents.add(this.branchSelect, "change", this.branchChange.bind(this))
+		pageEvents.add(this.branchResetBtn, "click", this.branchReset.bind(this))
 		
 		this.offsetSlider = new InputSlider(this.offsetDiv, -60, 60, 3)
 		this.offsetSlider.onchange(this.offsetChange.bind(this))
@@ -39,6 +45,9 @@ class Debug{
 		this.updateStatus()
 		pageEvents.send("debug")
 	}
+	byClass(name){
+		return this.debugDiv.getElementsByClassName(name)[0]
+	}
 	startMove(event){
 		if(event.which === 1){
 			event.stopPropagation()
@@ -88,17 +97,23 @@ class Debug{
 	}
 	updateStatus(){
 		if(debugObj.controller && !this.controller){
+			this.controller = debugObj.controller
+			
 			this.restartBtn.style.display = "block"
 			this.autoplayLabel.style.display = "block"
+			if(this.controller.parsedSongData.branches){
+				this.branchHideDiv.style.display = "block"
+			}
 			
-			this.controller = debugObj.controller
 			var selectedSong = this.controller.selectedSong
 			this.defaultOffset = selectedSong.offset || 0
 			if(this.songFolder === selectedSong.folder){
 				this.offsetChange(this.offsetSlider.get(), true)
+				this.branchChange(null, true)
 			}else{
 				this.songFolder = selectedSong.folder
 				this.offsetSlider.set(this.defaultOffset)
+				this.branchReset(null, true)
 			}
 			
 			var measures = this.controller.parsedSongData.measures
@@ -128,6 +143,7 @@ class Debug{
 		if(this.controller && !debugObj.controller){
 			this.restartBtn.style.display = ""
 			this.autoplayLabel.style.display = ""
+			this.branchHideDiv.style.display = ""
 			this.controller = null
 		}
 	}
@@ -142,6 +158,11 @@ class Debug{
 			songData.measures.forEach(measure => {
 				measure.ms = measure.originalMS + offset
 			})
+			if(songData.branches){
+				songData.branches.forEach(branch => {
+					branch.ms = branch.originalMS + offset
+				})
+			}
 			if(this.restartCheckbox.checked && !noRestart){
 				this.restartSong()
 			}
@@ -171,21 +192,44 @@ class Debug{
 			}
 		}
 	}
+	branchChange(event, noRestart){
+		if(this.controller){
+			var game = this.controller.game
+			var name = this.branchSelect.value
+			game.branch = name === "auto" ? false : name
+			game.branchSet = false
+			if(this.restartCheckbox.checked && !noRestart){
+				this.restartSong()
+			}
+		}
+	}
+	branchReset(event, noRestart){
+		this.branchSelect.value = "auto"
+		this.branchChange(null, noRestart)
+	}
 	clean(){
 		this.offsetSlider.clean()
+		this.measureNumSlider.clean()
 		
 		pageEvents.remove(window, ["mousedown", "mouseup", "blur"])
 		pageEvents.mouseRemove(this)
+		pageEvents.remove(this.titleDiv, "mousedown")
 		pageEvents.remove(this.title, "mousedown")
 		pageEvents.remove(this.minimiseDiv, "click")
 		pageEvents.remove(this.restartBtn, "click")
 		pageEvents.remove(this.exitBtn, "click")
 		pageEvents.remove(this.autoplayCheckbox, "change")
+		pageEvents.remove(this.branchSelect, "change")
+		pageEvents.remove(this.branchResetBtn, "click")
 		
 		delete this.titleDiv
 		delete this.minimiseDiv
 		delete this.offsetDiv
 		delete this.measureNumDiv
+		delete this.branchHideDiv
+		delete this.branchSelectDiv
+		delete this.branchSelect
+		delete this.branchResetBtn
 		delete this.restartCheckbox
 		delete this.autoplayLabel
 		delete this.autoplayCheckbox

public/src/js/game.js

@@ -19,8 +19,8 @@ class Game{
 			difficulty: this.rules.difficulty
 		}
 		this.HPGain = 100 / this.songData.circles.filter(circle => {
-			var type = circle.getType()
-			return type === "don" || type === "ka" || type === "daiDon" || type === "daiKa"
+			var type = circle.type
+			return (type === "don" || type === "ka" || type === "daiDon" || type === "daiKa") && (!circle.branch || circle.branch.active)
 		}).length
 		this.paused = false
 		this.started = false
@@ -28,6 +28,8 @@ class Game{
 		this.musicFadeOut = 0
 		this.fadeOutStarted = false
 		this.currentTimingPoint = 0
+		this.sectionNotes = []
+		this.sectionDrumroll = 0
 		
 		assets.songs.forEach(song => {
 			if(song.id == selectedSong.folder){
@@ -69,17 +71,18 @@ class Game{
 	}
 	updateCirclesStatus(){
 		var nextSet = false
+		var ms = this.elapsedTime
 		var circles = this.songData.circles
 		var startIndex = this.currentCircle === 0 ? 0 : this.currentCircle - 1
-		for(var i = startIndex; i < circles.length && i < this.currentCircle + 2; i++){
+		var index = 0
+		for(var i = startIndex; i < circles.length; i++){
 			var circle = circles[i]
-			if(!circle.getPlayed()){
-				var ms = this.elapsedTime
-				var type = circle.getType()
+			if((!circle.branch || circle.branch.active) && !circle.isPlayed){
+				var type = circle.type
 				var drumrollNotes = type === "balloon" || type === "drumroll" || type === "daiDrumroll"
-				var endTime = circle.getEndTime() + (drumrollNotes ? 0 : this.rules.bad)
+				var endTime = circle.endTime + (drumrollNotes ? 0 : this.rules.bad)
 				
-				if(ms >= circle.getMS()){
+				if(ms >= circle.ms){
 					if(drumrollNotes && !circle.rendaPlayed && ms < endTime){
 						circle.rendaPlayed = true
 						if(this.rules.difficulty === "easy"){
@@ -101,7 +104,7 @@ class Game{
 							this.updateCurrentCircle()
 							if(this.controller.multiplayer === 1){
 								var value = {
-									pace: (ms - circle.getMS()) / circle.timesHit
+									pace: (ms - circle.ms) / circle.timesHit
 								}
 								if(type === "drumroll" || type === "daiDrumroll"){
 									value.kaAmount = circle.timesKa / circle.timesHit
@@ -111,6 +114,7 @@ class Game{
 						}else{
 							var currentScore = 0
 							circle.played(-1, type === "daiDon" || type === "daiKa")
+							this.sectionNotes.push(0)
 							this.controller.displayScore(currentScore, true)
 							this.updateCurrentCircle()
 							this.updateCombo(currentScore)
@@ -126,6 +130,56 @@ class Game{
 					nextSet = true
 					this.currentCircle = i
 				}
+				if(index++ > 1){
+					break
+				}
+			}
+		}
+		var branches = this.songData.branches
+		if(branches){
+			if(this.controller.multiplayer === 2 || this.branch){
+				var parent = this.controller.multiplayer === 2 ? p2 : this
+				var view = this.controller.view
+				if(view.branch !== parent.branch){
+					view.branchAnimate = {
+						ms: ms,
+						fromBranch: view.branch
+					}
+					view.branch = parent.branch
+				}
+				if(!parent.branchSet){
+					parent.branchSet = true
+					for(var i = 0; i < branches.length; i++){
+						this.setBranch(branches[i], parent.branch)
+					}
+				}
+			}else{
+				var measures = this.songData.measures
+				for(var i = 0; i < measures.length; i++){
+					var measure = measures[i]
+					if(measure.ms > ms){
+						break
+					}else if(measure.nextBranch && !measure.gameChecked){
+						measure.gameChecked = true
+						var branch = measure.nextBranch
+						if(branch.type){
+							if(branch.type === "drumroll"){
+								var accuracy = this.sectionDrumroll
+							}else{
+								var accuracy = this.sectionNotes.reduce((a, b) => a + b) / this.sectionNotes.length * 100
+							}
+							if(accuracy >= branch.requirement[1]){
+								this.setBranch(branch, "master")
+							}else if(accuracy >= branch.requirement[0]){
+								this.setBranch(branch, "advanced")
+							}else{
+								this.setBranch(branch, "normal")
+							}
+						}else if(this.controller.multiplayer === 1){
+							p2.send("branch", "normal")
+						}
+					}
+				}
 			}
 		}
 	}
@@ -160,7 +214,7 @@ class Game{
 		}
 	}
 	checkKey(keyCodes, circle, check){
-		if(circle && !circle.getPlayed()){
+		if(circle && !circle.isPlayed){
 			if(!this.checkScore(circle, check)){
 				return
 			}
@@ -171,7 +225,7 @@ class Game{
 	}
 	checkScore(circle, check){
 		var ms = this.elapsedTime
-		var type = circle.getType()
+		var type = circle.type
 		
 		var keysDon = check === "don" || check === "daiDon"
 		var keysKa = check === "ka" || check === "daiKa"
@@ -182,7 +236,7 @@ class Game{
 		
 		var keyTime = this.controller.getKeyTime()
 		var currentTime = keysDon ? keyTime["don"] : keyTime["ka"]
-		var relative = currentTime - circle.getMS()
+		var relative = currentTime - circle.ms
 		
 		if(typeDon || typeKa){
 			if(-this.rules.bad >= relative || relative >= this.rules.bad){
@@ -219,10 +273,11 @@ class Game{
 			this.updateCombo(score)
 			this.updateGlobalScore(score, typeDai && keyDai ? 2 : 1, circle.gogoTime)
 			this.updateCurrentCircle()
-			if(this.controller.multiplayer == 1){
+			this.sectionNotes.push(score === 450 ? 1 : (score === 230 ? 0.5 : 0))
+			if(this.controller.multiplayer === 1){
 				var value = {
 					score: score,
-					ms: circle.getMS() - currentTime,
+					ms: circle.ms - currentTime,
 					dai: typeDai ? keyDai ? 2 : 1 : 0
 				}
 				if((!keysDon || !typeDon) && (!keysKa || !typeKa)){
@@ -231,12 +286,12 @@ class Game{
 				p2.send("note", value)
 			}
 		}else{
-			if(circle.getMS() > currentTime || currentTime > circle.getEndTime()){
+			if(circle.ms > currentTime || currentTime > circle.endTime){
 				return true
 			}
 			if(keysDon && type === "balloon"){
 				this.checkBalloon(circle)
-				if(check === "daiDon" && !circle.getPlayed()){
+				if(check === "daiDon" && !circle.isPlayed){
 					this.checkBalloon(circle)
 				}
 			}else if((keysDon || keysKa) && (type === "drumroll" || type === "daiDrumroll")){
@@ -256,24 +311,25 @@ class Game{
 			circle.played(score)
 			if(this.controller.multiplayer == 1){
 				p2.send("drumroll", {
-					pace: (this.elapsedTime - circle.getMS()) / circle.timesHit
+					pace: (this.elapsedTime - circle.ms) / circle.timesHit
 				})
 			}
 		}else{
 			var score = 300
 			circle.hit()
 		}
-		this.globalScore.drumroll ++
+		this.globalScore.drumroll++
+		this.sectionDrumroll++
 		this.globalScore.points += score
 		this.view.setDarkBg(false)
 	}
 	checkDrumroll(circle, keysKa){
 		var ms = this.elapsedTime
-		var dai = circle.getType() === "daiDrumroll"
+		var dai = circle.type === "daiDrumroll"
 		var score = 100
 		circle.hit(keysKa)
 		var keyTime = this.controller.getKeyTime()
-		if(circle.getType() === "drumroll"){
+		if(circle.type === "drumroll"){
 			var sound = keyTime["don"] > keyTime["ka"] ? "don" : "ka"
 		}else{
 			var sound = keyTime["don"] > keyTime["ka"] ? "daiDon" : "daiKa"
@@ -291,6 +347,9 @@ class Game{
 		circleAnim.animate(ms)
 		this.view.drumroll.push(circleAnim)
 		this.globalScore.drumroll++
+		if(this.controller.multiplayer !== 2){
+			this.sectionDrumroll++
+		}
 		this.globalScore.points += score * (dai ? 2 : 1)
 		this.view.setDarkBg(false)
 	}
@@ -298,11 +357,11 @@ class Game{
 		var ms = this.elapsedTime
 		if(!this.lastCircle){
 			var circles = this.songData.circles
-			this.lastCircle = circles[circles.length - 1].getEndTime()
+			this.lastCircle = circles[circles.length - 1].endTime
 			if(this.controller.multiplayer){
 				var syncWith = this.controller.syncWith
 				var syncCircles = syncWith.game.songData.circles
-				var syncLastCircle = syncCircles[syncCircles.length - 1].getEndTime()
+				var syncLastCircle = syncCircles[syncCircles.length - 1].endTime
 				if(syncLastCircle > this.lastCircle){
 					this.lastCircle = syncLastCircle
 				}
@@ -410,7 +469,14 @@ class Game{
 		return this.songData.circles
 	}
 	updateCurrentCircle(){
-		this.currentCircle++
+		var circles = this.songData.circles
+		do{
+			var circle = circles[++this.currentCircle]
+		}while(circle && circle.branch && !circle.branch.active)
+		if(circle && circle.section){
+			this.sectionNotes = []
+			this.sectionDrumroll = 0
+		}
 	}
 	getCurrentCircle(){
 		return this.currentCircle
@@ -464,4 +530,16 @@ class Game{
 		}
 		this.globalScore.points += Math.floor(score * multiplier / 10) * 10
 	}
+	setBranch(branch, name){
+		var names = ["normal", "advanced", "master"]
+		for(var i in names){
+			if(names[i] in branch){
+				branch[names[i]].active = names[i] === name
+			}
+		}
+		branch.active = name
+		if(this.controller.multiplayer === 1){
+			p2.send("branch", name)
+		}
+	}
 }

public/src/js/importsongs.js

@@ -199,7 +199,7 @@
 				songObj.subtitle = songObj.subtitle_en = subtitle
 				songObj.preview = meta.demostart ? Math.floor(meta.demostart * 1000) : 0
 				if(meta.level){
-					songObj.stars[this.courseTypes[diff]] = meta.level
+					songObj.stars[this.courseTypes[diff]] = meta.level + (meta.branch ? " B" : "")
 				}
 				if(meta.wave){
 					songObj.music = this.otherFiles[dir + meta.wave.toLowerCase()]

public/src/js/keyboard.js

@@ -199,8 +199,8 @@ class Keyboard{
 			if(
 				sound === "don"
 				&& circle
-				&& !circle.getPlayed()
-				&& circle.getType() === "balloon"
+				&& !circle.isPlayed
+				&& circle.type === "balloon"
 				&& circle.requiredHits - circle.timesHit <= 1
 			){
 				this.controller.playSound("se_balloon")

public/src/js/mekadon.js

@@ -6,12 +6,12 @@ class Mekadon{
 		this.lastHit = -Infinity
 	}
 	play(circle){
-		var type = circle.getType()
-		if((type === "balloon" || type === "drumroll" || type === "daiDrumroll") && this.getMS() > circle.getEndTime()){
+		var type = circle.type
+		if((type === "balloon" || type === "drumroll" || type === "daiDrumroll") && this.getMS() > circle.endTime){
 			circle.played(-1, false)
 			this.game.updateCurrentCircle()
 		}
-		type = circle.getType()
+		type = circle.type
 		if(type === "balloon"){
 			this.playDrumrollAt(circle, 0, 30)
 		}else if(type === "drumroll" || type === "daiDrumroll"){
@@ -21,7 +21,7 @@ class Mekadon{
 		}
 	}
 	playAt(circle, ms, score, dai, reverse){
-		var currentMs = circle.getMS() - this.getMS()
+		var currentMs = circle.ms - this.getMS()
 		if(ms > currentMs - 10){
 			return this.playNow(circle, score, dai, reverse)
 		}
@@ -36,18 +36,19 @@ class Mekadon{
 		}
 	}
 	miss(circle){
-		var currentMs = circle.getMS() - this.getMS()
+		var currentMs = circle.ms - this.getMS()
 		if(0 >= currentMs - 10){
 			this.controller.displayScore(0, true)
 			this.game.updateCurrentCircle()
 			this.game.updateCombo(0)
 			this.game.updateGlobalScore(0, 1, circle.gogoTime)
+			this.game.sectionNotes.push(0)
 			return true
 		}
 	}
 	playNow(circle, score, dai, reverse){
 		var kbd = this.controller.getBindings()
-		var type = circle.getType()
+		var type = circle.type
 		var keyDai = false
 		var playDai = !dai || dai === 2
 		var drumrollNotes = type === "balloon" || type === "drumroll" || type === "daiDrumroll"
@@ -55,7 +56,7 @@ class Mekadon{
 		if(drumrollNotes){
 			var ms = this.getMS()
 		}else{
-			var ms = circle.getMS()
+			var ms = circle.ms
 		}
 		
 		if(reverse){
@@ -95,6 +96,7 @@ class Mekadon{
 			this.game.updateGlobalScore(score, keyDai ? 2 : 1, circle.gogoTime)
 			this.game.updateCurrentCircle()
 			circle.played(score, keyDai)
+			this.game.sectionNotes.push(score === 450 ? 1 : (score === 230 ? 0.5 : 0))
 		}
 		this.lastHit = ms
 		return true

public/src/js/p2.js

@@ -109,6 +109,7 @@ class P2Connection{
 				this.dai = 2
 				this.kaAmount = 0
 				this.results = false
+				this.branch = "normal"
 				break
 			case "gameend":
 				this.otherConnected = false
@@ -141,6 +142,10 @@ class P2Connection{
 					this.kaAmount = response.value.kaAmount
 				}
 				break
+			case "branch":
+				this.branch = response.value
+				this.branchSet = false
+				break
 			case "session":
 				this.clearMessage("users")
 				this.otherConnected = true
@@ -161,10 +166,10 @@ class P2Connection{
 	}
 	play(circle, mekadon){
 		if(this.otherConnected || this.notes.length > 0){
-			var type = circle.getType()
+			var type = circle.type
 			var drumrollNotes = type === "balloon" || type === "drumroll" || type === "daiDrumroll"
 			
-			if(drumrollNotes && mekadon.getMS() > circle.getEndTime()){
+			if(drumrollNotes && mekadon.getMS() > circle.endTime){
 				circle.played(-1, false)
 				mekadon.game.updateCurrentCircle()
 			}
@@ -177,7 +182,7 @@ class P2Connection{
 				var note = this.notes[0]
 				if(note.score >= 0){
 					var dai = 1
-					if(circle.getType() === "daiDon" || circle.getType() === "daiKa"){
+					if(circle.type === "daiDon" || circle.type === "daiKa"){
 						dai = this.dai
 					}
 					if(mekadon.playAt(circle, note.ms, note.score, dai, note.reverse)){

public/src/js/parsetja.js

@@ -59,7 +59,9 @@
 							if(!(courseName in courses)){
 								courses[courseName] = {}
 							}
-							courses[courseName][name] = currentCourse[name]
+							if(name !== "branch"){
+								courses[courseName][name] = currentCourse[name]
+							}
 						}
 						courses[courseName].start = lineNum + 1
 						courses[courseName].end = this.data.length
@@ -70,6 +72,8 @@
 						hasSong = true
 						courses[courseName].end = lineNum
 					}
+				}else if(name.startsWith("branchstart") && inSong){
+					courses[courseName].branch = true
 				}
 				
 			}else if(!inSong){
@@ -128,9 +132,13 @@
 		var balloons = meta.balloon || []
 		
 		var lastDrumroll = false
+		
 		var branch = false
-		var branchType
-		var branchPreference = "m"
+		var branchObj = {}
+		var currentBranch = false
+		var branchSettings = {}
+		var branchPushed = false
+		var sectionBegin = true
 		
 		var currentMeasure = []
 		var firstNote = true
@@ -138,19 +146,19 @@
 		var circleID = 0
 		
 		var pushMeasure = () => {
-			if(barLine){
-				var note = currentMeasure[0]
-				if(note){
-					var speed = note.bpm * note.scroll / 60
-				}else{
-					var speed = bpm * scroll / 60
-				}
-				this.measures.push({
-					ms: ms,
-					originalMS: ms,
-					speed: speed
-				})
+			var note = currentMeasure[0]
+			if(note){
+				var speed = note.bpm * note.scroll / 60
+			}else{
+				var speed = bpm * scroll / 60
 			}
+			this.measures.push({
+				ms: ms,
+				originalMS: ms,
+				speed: speed,
+				visible: barLine,
+				branch: currentBranch
+			})
 			if(currentMeasure.length){
 				for(var i = 0; i < currentMeasure.length; i++){
 					var note = currentMeasure[i]
@@ -182,7 +190,9 @@
 							gogoTime: note.gogo,
 							endTime: note.endTime,
 							requiredHits: note.requiredHits,
-							beatMS: 60000 / note.bpm
+							beatMS: 60000 / note.bpm,
+							branch: currentBranch,
+							section: note.section
 						})
 						if(lastDrumroll === note){
 							lastDrumroll = circleObj
@@ -204,59 +214,112 @@
 				var line = line.slice(1).toLowerCase()
 				var [name, value] = this.split(line, " ")
 				
-				if(!branch || branch && branchType === branchPreference){
-					switch(name){
-						case "gogostart":
-							gogo = true
-							break
-						case "gogoend":
-							gogo = false
-							break
-						case "bpmchange":
-							bpm = parseFloat(value)
-							break
-						case "scroll":
-							scroll = parseFloat(value)
-							break
-						case "measure":
-							var [numerator, denominator] = value.split("/")
-							measure = numerator / denominator * 4
-							break
-						case "delay":
-							ms += (parseFloat(value) || 0) * 1000
-							break
-						case "barlineon":
-							barLine = true
-							break
-						case "barlineoff":
-							barLine = false
-							break
-					}
-				}
 				switch(name){
+					case "gogostart":
+						gogo = true
+						break
+					case "gogoend":
+						gogo = false
+						break
+					case "bpmchange":
+						bpm = parseFloat(value)
+						break
+					case "scroll":
+						scroll = parseFloat(value)
+						break
+					case "measure":
+						var [numerator, denominator] = value.split("/")
+						measure = numerator / denominator * 4
+						break
+					case "delay":
+						ms += (parseFloat(value) || 0) * 1000
+						break
+					case "barlineon":
+						barLine = true
+						break
+					case "barlineoff":
+						barLine = false
+						break
 					case "branchstart":
 						branch = true
-						branchType = ""
+						currentBranch = false
+						branchPushed = false
+						branchSettings = {
+							ms: ms,
+							gogo: gogo,
+							bpm: bpm,
+							scroll: scroll,
+							sectionBegin: sectionBegin
+						}
 						value = value.split(",")
-						var forkType = value[0].toLowerCase()
-						if(forkType === "r" || parseFloat(value[2]) <= 100){
-							branchPreference = "m"
-						}else if(parseFloat(value[1]) <= 100){
-							branchPreference = "e"
-						}else{
-							branchPreference = "n"
+						if(!this.branches){
+							this.branches = []
+						}
+						branchObj = {
+							ms: ms,
+							originalMS: ms,
+							type: value[0].toLowerCase() === "r" ? "drumroll" : "perfect",
+							requirement: [
+								parseFloat(value[1]),
+								parseFloat(value[2])
+							]
 						}
 						break
 					case "branchend":
-					case "section":
 						branch = false
+						currentBranch = false
+						if(this.measures.length !== 0){
+							this.measures[this.measures.length - 1].nextBranch = {
+								ms: ms,
+								originalMS: ms,
+								active: "normal"
+							}
+						}
+						break
+					case "section":
+						sectionBegin = true
+						if(branch && !currentBranch){
+							branchSettings.sectionBegin = true
+						}
 						break
 					case "n": case "e": case "m":
-						branchType = name
+						if(!branchPushed){
+							branchPushed = true
+							this.branches.push(branchObj)
+							if(this.measures.length === 1 && branchObj.type === "drumroll"){
+								for(var i = circles.length; i--;){
+									var circle = circles[i]
+									if(circle.endTime && circle.type === "drumroll" || circle.type === "daiDrumroll" || circle.type === "balloon"){
+										this.measures.push({
+											ms: circle.endTime,
+											originalMS: circle.endTime,
+											speed: circle.bpm * circle.scroll / 60,
+											visible: false,
+											branch: circle.branch
+										})
+										break
+									}
+								}
+							}
+							if(this.measures.length !== 0){
+								this.measures[this.measures.length - 1].nextBranch = branchObj
+							}
+						}
+						ms = branchSettings.ms
+						gogo = branchSettings.gogo
+						bpm = branchSettings.bpm
+						scroll = branchSettings.scroll
+						sectionBegin = branchSettings.sectionBegin
+						var branchName = name === "m" ? "master" : (name === "e" ? "advanced" : "normal")
+						currentBranch = {
+							name: branchName,
+							active: branchName === "normal"
+						}
+						branchObj[branchName] = currentBranch
 						break
 				}
 				
-			}else if(!branch || branch && branchType === branchPreference){
+			}else{
 				
 				var string = line.split("")
 				
@@ -278,8 +341,10 @@
 								txt: type.txt,
 								gogo: gogo,
 								bpm: bpm,
-								scroll: scroll
+								scroll: scroll,
+								section: sectionBegin
 							}
+							sectionBegin = false
 							if(lastDrumroll){
 								circleObj.endDrumroll = lastDrumroll
 								lastDrumroll = false
@@ -293,15 +358,19 @@
 								txt: type.txt,
 								gogo: gogo,
 								bpm: bpm,
-								scroll: scroll
+								scroll: scroll,
+								section: sectionBegin
 							}
+							sectionBegin = false
 							if(lastDrumroll){
 								if(symbol === "9"){
 									currentMeasure.push({
 										endDrumroll: lastDrumroll,
 										bpm: bpm,
-										scroll: scroll
+										scroll: scroll,
+										section: sectionBegin
 									})
+									sectionBegin = false
 									lastDrumroll = false
 								}else{
 									currentMeasure.push({
@@ -327,8 +396,10 @@
 								currentMeasure.push({
 									endDrumroll: lastDrumroll,
 									bpm: bpm,
-									scroll: scroll
+									scroll: scroll,
+									section: sectionBegin
 								})
+								sectionBegin = false
 								lastDrumroll = false
 							}else{
 								currentMeasure.push({
@@ -359,6 +430,10 @@
 			lastDrumroll.originalEndTime = ms
 		}
 		
+		if(this.branches){
+			circles.sort((a, b) => a.ms > b.ms ? 1 : -1)
+			circles.forEach((circle, i) => circle.id = i + 1)
+		}
 		return circles
 	}
 }

public/src/js/songselect.js

@@ -351,7 +351,7 @@ class SongSelect{
 			down: code == 40
 			// Down
 		}
-		if(key.cancel && event){
+		if(event && (code == 27 || code == 8)){
 			event.preventDefault()
 		}
 		if(this.state.screen === "song"){
@@ -1322,27 +1322,47 @@ class SongSelect{
 								outlineSize: currentUra ? this.songAsset.letterBorder : 0
 							})
 						})
-						var songStars = currentUra ? currentSong.stars[4] : currentSong.stars[i]
-						for(var j = 0; j < 10; j++){
-							if(songSel){
-								var yPos = _y + 113 + j * 17
-							}else{
-								var yPos = _y + 178 + j * 19.5
-							}
-							if(10 - j > songStars){
-								ctx.fillStyle = currentUra ? "#187085" : (songSel ? "#e97526" : "#e7e7e7")
-								ctx.beginPath()
-								ctx.arc(_x, yPos, songSel ? 4.5 : 5, 0, Math.PI * 2)
-								ctx.fill()
-							}else{
-								this.draw.diffStar({
-									ctx: ctx,
-									songSel: songSel,
-									ura: currentUra,
-									x: _x,
-									y: yPos,
-									ratio: ratio
-								})
+						var songStarsArray = (currentUra ? currentSong.stars[4] : currentSong.stars[i]).toString().split(" ")
+						var songStars = songStarsArray[0]
+						var songBranch = songStarsArray[1] === "B"
+						var elapsedMS = this.state.screenMS > this.state.moveMS ? this.state.screenMS : this.state.moveMS
+						var fade = ((ms - elapsedMS) % 2000) / 2000
+						if(songBranch && fade > 0.25 && fade < 0.75){
+							this.draw.verticalText({
+								ctx: ctx,
+								text: strings.songBranch,
+								x: _x,
+								y: _y + (songSel ? 110 : 185),
+								width: songSel ? 44 : 56,
+								height: songSel ? 160 : 170,
+								fill: songSel && !currentUra ? "#c85200" : "#fff",
+								fontSize: songSel ? 25 : 27,
+								fontFamily: songSel ? "Meiryo, Microsoft YaHei, sans-serif" : this.font,
+								outline: songSel ? false : "#f22666",
+								outlineSize: songSel ? 0 : this.songAsset.letterBorder
+							})
+						}else{
+							for(var j = 0; j < 10; j++){
+								if(songSel){
+									var yPos = _y + 113 + j * 17
+								}else{
+									var yPos = _y + 178 + j * 19.5
+								}
+								if(10 - j > songStars){
+									ctx.fillStyle = currentUra ? "#187085" : (songSel ? "#e97526" : "#e7e7e7")
+									ctx.beginPath()
+									ctx.arc(_x, yPos, songSel ? 4.5 : 5, 0, Math.PI * 2)
+									ctx.fill()
+								}else{
+									this.draw.diffStar({
+										ctx: ctx,
+										songSel: songSel,
+										ura: currentUra,
+										x: _x,
+										y: yPos,
+										ratio: ratio
+									})
+								}
 							}
 						}
 						var currentDiff = this.selectedDiff - this.diffOptions.length

public/src/js/soundbuffer.js

@@ -86,7 +86,7 @@ class SoundGain{
 		this.volume = amount
 	}
 	setCrossfade(amount){
-		this.setVolume(Math.pow(Math.sin(Math.PI / 2 * amount), 1 / 4))
+		this.setVolume(Math.sqrt(Math.sin(Math.PI / 2 * amount)))
 	}
 	fadeIn(duration, time, absolute){
 		this.fadeVolume(0, this.volume * this.volume, duration, time, absolute)

public/src/js/strings.js

@@ -34,6 +34,7 @@
 	this.normal = "ふつう"
 	this.hard = "むずかしい"
 	this.oni = "おに"
+	this.songBranch = "譜面分岐あり"
 	this.sessionStart = "オンラインセッションを開始する！"
 	this.sessionEnd = "オンラインセッションを終了する"
 	this.loading = "ロード中..."
@@ -135,6 +136,7 @@ function StringsEn(){
 	this.normal = "Normal"
 	this.hard = "Hard"
 	this.oni = "Extreme"
+	this.songBranch = "Forked Paths"
 	this.sessionStart = "Begin an Online Session!"
 	this.sessionEnd = "End Online Session"
 	this.loading = "Loading..."
@@ -236,6 +238,7 @@ function StringsCn(){
 	this.normal = "普通"
 	this.hard = "困难"
 	this.oni = "魔王"
+	this.songBranch = "有分数分支"
 	this.sessionStart = "开始在线会话!"
 	this.sessionEnd = "结束在线会话"
 	this.loading = "加载中..."
@@ -337,6 +340,7 @@ function StringsTw(){
 	this.normal = "普通"
 	this.hard = "困難"
 	this.oni = "魔王"
+	this.songBranch = "有分數分支"
 	this.sessionStart = "開始多人模式!"
 	this.sessionEnd = "結束多人模式"
 	this.loading = "讀取中..."
@@ -438,6 +442,7 @@ function StringsKo(){
 	this.normal = "보통"
 	this.hard = "어려움"
 	this.oni = "귀신"
+	this.songBranch = "악보 분기 있습니다"
 	this.sessionStart = "온라인 세션 시작!"
 	this.sessionEnd = "온라인 세션 끝내기"
 	this.loading = "로딩 중..."

public/src/js/titlescreen.js

@@ -18,7 +18,11 @@ class Titlescreen{
 		this.setLang(allStrings[this.lang], true)
 		
 		if(songId){
-			this.goNext()
+			if(localStorage.getItem("tutorial") === "true"){
+				new SongSelect(false, false, this.touched, this.songId)
+			}else{
+				new Tutorial(false, this.songId)
+			}
 		}else{
 			this.addLangs()
 			

public/src/js/view.js

@@ -75,6 +75,18 @@
 		this.gogoTime = 0
 		this.drumroll = []
 		this.touchEvents = 0
+		if(this.controller.parsedSongData.branches){
+			this.branch = "normal"
+			this.branchAnimate = {
+				ms: -Infinity,
+				fromBranch: "normal"
+			}
+			this.branchMap = {
+				"normal": "rgba(0, 0, 0, 0)",
+				"advanced": "rgba(29, 129, 189, 0.4)",
+				"master": "rgba(230, 29, 189, 0.4)"
+			}
+		}
 		
 		this.beatInterval = this.controller.parsedSongData.beatInfo.beatInterval
 		this.font = strings.font
@@ -693,6 +705,18 @@
 			}
 			ctx.fillRect(padding, barY, winW - padding, barH)
 		}
+		if(this.branchAnimate && ms <= this.branchAnimate.ms + 300){
+			var alpha = Math.max(0, (ms - this.branchAnimate.ms) / 300)
+			ctx.globalAlpha = 1 - alpha
+			ctx.fillStyle = this.branchMap[this.branchAnimate.fromBranch]
+			ctx.fillRect(padding, barY, winW - padding, barH)
+			ctx.globalAlpha = alpha
+		}
+		if(this.branch){
+			ctx.fillStyle = this.branchMap[this.branch]
+			ctx.fillRect(padding, barY, winW - padding, barH)
+			ctx.globalAlpha = 1
+		}
 		if(keyTime[sound] > ms - 130){
 			var gradients = {
 				"don": "255, 0, 0",
@@ -1102,7 +1126,7 @@
 			var timeForDistance = this.posToMs(distanceForCircle, measure.speed)
 			var startingTime = measure.ms - timeForDistance
 			var finishTime = measure.ms + this.posToMs(this.slotPos.x - this.slotPos.paddingLeft + 3, measure.speed)
-			if(ms >= startingTime && ms <= finishTime){
+			if(measure.visible && (!measure.branch || measure.branch.active) && ms >= startingTime && ms <= finishTime){
 				var measureX = this.slotPos.x + this.msToPos(measure.ms - ms, measure.speed)
 				this.ctx.strokeStyle = "#bdbdbd"
 				this.ctx.lineWidth = 3
@@ -1111,6 +1135,14 @@
 				this.ctx.lineTo(measureX, measureY + measureH)
 				this.ctx.stroke()
 			}
+			if(this.multiplayer !== 2 && ms >= measure.ms && measure.nextBranch && !measure.viewChecked && measure.gameChecked){
+				measure.viewChecked = true
+				this.branchAnimate = {
+					ms: ms,
+					fromBranch: this.branch
+				}
+				this.branch = measure.nextBranch.active
+			}
 		})
 	}
 	updateNoteFaces(){
@@ -1137,17 +1169,17 @@
 		
 		for(var i = circles.length; i--;){
 			var circle = circles[i]
-			var speed = circle.getSpeed()
+			var speed = circle.speed
 			
 			var timeForDistance = this.posToMs(distanceForCircle + this.slotPos.size / 2, speed)
-			var startingTime = circle.getMS() - timeForDistance
-			var finishTime = circle.getEndTime() + this.posToMs(this.slotPos.x - this.slotPos.paddingLeft + this.slotPos.size * 2, speed)
+			var startingTime = circle.ms - timeForDistance
+			var finishTime = circle.endTime + this.posToMs(this.slotPos.x - this.slotPos.paddingLeft + this.slotPos.size * 2, speed)
 			
-			if(circle.getPlayed() <= 0 || circle.getScore() === 0){
-				if(ms >= startingTime && ms <= finishTime && circle.getPlayed() !== -1){
+			if(circle.isPlayed <= 0 || circle.score === 0){
+				if((!circle.branch || circle.branch.active) && ms >= startingTime && ms <= finishTime && circle.isPlayed !== -1){
 					this.drawCircle(circle)
 				}
-			}else if(!circle.isAnimated()){
+			}else if(!circle.animating){
 				// Start animation to gauge
 				circle.animate(ms)
 			}
@@ -1165,9 +1197,9 @@
 		for(var i = 0; i < circles.length; i++){
 			var circle = circles[i]
 			
-			if(circle.isAnimated()){
+			if(circle.animating){
 				
-				var animT = circle.getAnimT()
+				var animT = circle.animT
 				if(ms < animT + 490){
 					
 					if(circle.fixedPos){
@@ -1183,7 +1215,7 @@
 					var pos = this.animateBezier[3]
 					this.drawCircle(circle, pos, (ms - animT - 490) / 160)
 				}else{
-					circle.endAnimation()
+					circle.animationEnded = true
 				}
 			}
 		}
@@ -1211,13 +1243,13 @@
 		var lyricsSize = 20 * mul
 		
 		var fill, size, faceID
-		var type = circle.getType()
+		var type = circle.type
 		var ms = this.getMS()
-		var circleMs = circle.getMS()
-		var endTime = circle.getEndTime()
-		var animated = circle.isAnimated()
-		var speed = circle.getSpeed()
-		var played = circle.getPlayed()
+		var circleMs = circle.ms
+		var endTime = circle.endTime
+		var animated = circle.animating
+		var speed = circle.speed
+		var played = circle.isPlayed
 		var drumroll = 0
 		var endX = 0
 		
@@ -1323,9 +1355,9 @@
 			ctx.fill()
 			ctx.globalAlpha = 1
 		}
-		if(!circle.isAnimated()){
+		if(!circle.animating){
 			// Text
-			var text = circle.getText()
+			var text = circle.text
 			var textX = circlePos.x
 			var textY = circlePos.y + 83 * mul
 			ctx.font = lyricsSize + "px Kozuka, Microsoft YaHei, sans-serif"
@@ -1466,7 +1498,7 @@
 		if(this.gogoTime){
 			var circles = this.controller.parsedSongData.circles
 			var lastCircle = circles[circles.length - 1]
-			var endTime = lastCircle.getEndTime() + 3000
+			var endTime = lastCircle.endTime + 3000
 			if(ms >= endTime){
 				this.toggleGogoTime({
 					gogoTime: 0,

public/src/views/debug.html

@@ -9,6 +9,17 @@
 	<div class="measure-num input-slider">
 		<span class="reset">x</span><input type="text" value="" readonly><span class="minus">-</span><span class="plus">+</span>
 	</div>
+	<div class="branch-hide">
+		<div>Branch:</div>
+		<div class="branch-select select">
+			<span class="reset">x</span><select>
+				<option value="auto" selected>Auto</option>
+				<option value="normal">Normal</option>
+				<option value="advanced">Advanced</option>
+				<option value="master">Master</option>
+			</select>
+		</div>
+	</div>
 	<label><input class="change-restart" type="checkbox">Restart on change</label>
 	<label class="autoplay-label"><input class="autoplay" type="checkbox">Auto play</label>
 	<div class="bottom-btns">

server.py

@@ -185,6 +185,7 @@ async def connection(ws, path):
 					if "other_user" in user and "ws" in user["other_user"]:
 						if type == "note"\
 							or type == "drumroll"\
+							or type == "branch"\
 							or type == "gameresults":
 							await user["other_user"]["ws"].send(msgobj(type, value))
 						elif type == "songsel" and user["session"]: