From eafcfa4deb7cb8ea413c193715620d77a610bb3a Mon Sep 17 00:00:00 2001
From: oc <ckcz123@126.com>
Date: Sat, 5 May 2018 01:54:57 +0800
Subject: [PATCH] setVolume

---
 _server/blockly/MotaAction.g4 | 18 ++++++++++++++++++
 _server/editor_blockly.js     |  1 +
 docs/event.md                 |  8 ++++++++
 libs/control.js               |  6 ++++--
 libs/core.js                  |  4 ++++
 libs/events.js                | 11 +++++++++++
 6 files changed, 46 insertions(+), 2 deletions(-)

diff --git a/_server/blockly/MotaAction.g4 b/_server/blockly/MotaAction.g4
index c0cc73ff..6949caff 100644
--- a/_server/blockly/MotaAction.g4
+++ b/_server/blockly/MotaAction.g4
@@ -216,6 +216,7 @@ action
     |   pauseBgm_s
     |   resumeBgm_s
     |   playSound_s
+    |   setVolume_s
     |   win_s
     |   lose_s
     |   if_s
@@ -834,6 +835,19 @@ var code = '{"type": "playSound", "name": "'+EvalString_0+'"},\n';
 return code;
 */
 
+setVolume_s
+    :   '设置音量' Int Newline
+    ;
+
+/* setVolume_s
+tooltip : setVolume: 设置音量
+helpUrl : https://ckcz123.github.io/mota-js/#/event?id=setVolume-%e8%ae%be%e7%bd%ae%e9%9f%b3%e9%87%8f
+default : [90]
+colour : this.soundColor
+var code = '{"type": "setVolume", "value": '+Int_0+'},\n';
+return code;
+*/
+
 win_s
     :   '游戏胜利,结局' ':' EvalString? Newline
     ;
@@ -1452,6 +1466,10 @@ ActionParser.prototype.parseAction = function() {
       this.next = MotaActionBlocks['resumeBgm_s'].xmlText([
         this.next]);
       break
+    case "setVolume":
+      this.next = MotaActionBlocks['setVolume_s'].xmlText([
+        data.value, this.next]);
+      break
     case "setValue":
       this.next = MotaActionBlocks['setValue_s'].xmlText([
         MotaActionBlocks['idString_e'].xmlText([data.name]),
diff --git a/_server/editor_blockly.js b/_server/editor_blockly.js
index ba05260b..a7325e30 100644
--- a/_server/editor_blockly.js
+++ b/_server/editor_blockly.js
@@ -111,6 +111,7 @@ editor_blockly = function () {
       MotaActionBlocks['pauseBgm_s'].xmlText(),
       MotaActionBlocks['resumeBgm_s'].xmlText(),
       MotaActionBlocks['playSound_s'].xmlText(),
+      MotaActionBlocks['setVolume_s'].xmlText(),
       '<label text="其他"></label>',
       MotaActionBlocks['function_s'].xmlText(),
     ],
diff --git a/docs/event.md b/docs/event.md
index 89300fc6..1c936fa4 100644
--- a/docs/event.md
+++ b/docs/event.md
@@ -842,6 +842,14 @@ move完毕后移动的NPC/怪物一定会消失，只不过可以通过immediate
 
 值得注意的是，如果是额外添加进文件的音效，则需在main.js中this.sounds里加载它。
 
+### setVolume：设置音量
+
+使用setVolume可以设置音量大小。
+
+使用方法： `{"type": "setVolume", "value": 90}`
+
+value为音量大小，在0到100之间，默认为100。设置后，BGM和SE都将使用该音量进行播放。
+
 ### win: 获得胜利
 
 `{"type": "win", "reason": "xxx"}` 将会直接调用events.js中的win函数，并将reason作为结局传入。
diff --git a/libs/control.js b/libs/control.js
index fdc58a67..0073f330 100644
--- a/libs/control.js
+++ b/libs/control.js
@@ -2110,6 +2110,7 @@ control.prototype.playBgm = function (bgm) {
         }
         // 播放当前BGM
         core.musicStatus.playingBgm = bgm;
+        core.material.bgms[bgm].volume = core.musicStatus.volume;
         core.material.bgms[bgm].play();
         core.musicStatus.isPlaying = true;
 
@@ -2177,7 +2178,7 @@ control.prototype.playSound = function (sound) {
         if (core.musicStatus.audioContext != null) {
             var source = core.musicStatus.audioContext.createBufferSource();
             source.buffer = core.material.sounds[sound];
-            source.connect(core.musicStatus.audioContext.destination);
+            source.connect(core.musicStatus.gainNode);
             try {
                 source.start(0);
             }
@@ -2190,11 +2191,12 @@ control.prototype.playSound = function (sound) {
             }
         }
         else {
+            core.material.sounds[sound].volume = core.musicStatus.volume;
             core.material.sounds[sound].play();
         }
     }
     catch (eee) {
-        console.log("无法播放SE "+bgm);
+        console.log("无法播放SE "+sound);
         console.log(eee);
     }
 }
diff --git a/libs/core.js b/libs/core.js
index a1fe38db..2370e57b 100644
--- a/libs/core.js
+++ b/libs/core.js
@@ -48,6 +48,8 @@ function core() {
         'soundStatus': true, // 是否播放SE
         'playingBgm': null, // 正在播放的BGM
         'isPlaying': false,
+        'gainNode': null,
+        'volume': 1.0, // 音量
     }
     this.platform = {
         'isOnline': true, // 是否http
@@ -187,6 +189,8 @@ core.prototype.init = function (coreData, callback) {
         window.AudioContext = window.AudioContext || window.webkitAudioContext || window.mozAudioContext || window.msAudioContext;
         try {
             core.musicStatus.audioContext = new window.AudioContext();
+            core.musicStatus.gainNode = core.musicStatus.audioContext.createGain();
+            core.musicStatus.gainNode.connect(core.musicStatus.audioContext.destination);
         } catch (e) {
             console.log("该浏览器不支持AudioContext");
             core.musicStatus.audioContext = null;
diff --git a/libs/events.js b/libs/events.js
index c5b5616a..c30ab341 100644
--- a/libs/events.js
+++ b/libs/events.js
@@ -537,6 +537,17 @@ events.prototype.doAction = function() {
             core.resumeBgm();
             this.doAction();
             break
+        case "setVolume":
+            data.value = parseInt(data.value||0);
+            if (data.value>100) data.value=100;
+            data.value = data.value / 100;
+            core.musicStatus.volume = data.value;
+            if (core.isset(core.musicStatus.playingBgm)) {
+                core.material.bgms[core.musicStatus.playingBgm].volume = data.value;
+            }
+            core.musicStatus.gainNode.gain.value = data.value;
+            this.doAction();
+            break;
         case "setValue":
             try {
                 var value=core.calValue(data.value);