diff --git a/danmaku2ass.py b/danmaku2ass.py
index 1876566..93f8943 100755
--- a/danmaku2ass.py
+++ b/danmaku2ass.py
@@ -318,6 +318,7 @@ def WriteCommentBilibiliPositioned(f, c, width, height, styleid):
         except IndexError:
             logging.warning(_('Invalid comment: %r') % c)
 
+
 def WriteCommentAcfunPositioned(f, c, width, height, styleid):
     AcfunPlayerSize = (560, 400)
     ZoomFactor = GetZoomFactor(AcfunPlayerSize, (width, height))
@@ -445,11 +446,7 @@ def WriteCommentSH5VPositioned(f, c, width, height, styleid):
             styles.append('\\fs%s' % fsize)
         if rotate_y is not None and rotate_z is not None:
             styles.append('\\frz%s' % round(rotate_z))
-            if not (-1 < rotate_z < 1):
-                styles.append('\\frx%s' % round(rotate_y*math.sin(rotate_z*math.pi/180.0)))
-                styles.append('\\fry%s' % round(rotate_y*math.cos(rotate_z*math.pi/180.0)))
-            else:
-                styles.append('\\fry%s' % round(rotate_y))
+            styles.append('\\fry%s' % round(rotate_y))
         if color is not None:
             styles.append('\\c&H%02X%02X%02X&' % (color & 0xff, (color >> 8) & 0xff, (color >> 16) & 0xff))
             if color == 0x000000:
@@ -507,6 +504,7 @@ def GetZoomFactor(SourceSize, TargetSize):
         GetZoomFactor.Cached_Result = (1, 0, 0)
         return GetZoomFactor.Cached_Result
 
+
 def ProcessComments(comments, f, width, height, bottomReserved, fontface, fontsize, alpha, lifetime, reduced, progress_callback):
     styleid = 'Danmaku2ASS_%04x' % random.randint(0, 0xffff)
     WriteASSHead(f, width, height, fontface, fontsize, alpha, styleid)
diff --git a/locale/en/LC_MESSAGES/danmaku2ass.mo b/locale/en/LC_MESSAGES/danmaku2ass.mo
index 27b3331..23849ca 100644
Binary files a/locale/en/LC_MESSAGES/danmaku2ass.mo and b/locale/en/LC_MESSAGES/danmaku2ass.mo differ
diff --git a/locale/en/LC_MESSAGES/danmaku2ass.po b/locale/en/LC_MESSAGES/danmaku2ass.po
index 381f4e9..5ad507a 100644
--- a/locale/en/LC_MESSAGES/danmaku2ass.po
+++ b/locale/en/LC_MESSAGES/danmaku2ass.po
@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Danmaku2ASS\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2014-02-02 18:51+0800\n"
+"POT-Creation-Date: 2014-02-03 16:50+0800\n"
 "Last-Translator: Star Brilliant <m13253@hotmail.com>\n"
 "Language: en\n"
 "MIME-Version: 1.0\n"
@@ -15,92 +15,92 @@ msgid "Invalid comment: %s"
 msgstr "Invalid comment: %s"
 
 #: danmaku2ass.py:158 danmaku2ass.py:192 danmaku2ass.py:235 danmaku2ass.py:317
-#: danmaku2ass.py:319 danmaku2ass.py:436 danmaku2ass.py:483 danmaku2ass.py:540
+#: danmaku2ass.py:319 danmaku2ass.py:437 danmaku2ass.py:480 danmaku2ass.py:538
 #, python-format
 msgid "Invalid comment: %r"
 msgstr "Invalid comment: %r"
 
-#: danmaku2ass.py:690 danmaku2ass.py:738
+#: danmaku2ass.py:688 danmaku2ass.py:736
 msgid "(FONT) sans-serif"
 msgstr "(FONT) Helvetica"
 
-#: danmaku2ass.py:719
+#: danmaku2ass.py:717
 #, python-format
 msgid "Unknown comment file format: %s"
 msgstr "Unknown comment file format: %s"
 
-#: danmaku2ass.py:736
+#: danmaku2ass.py:734
 msgid "OUTPUT"
 msgstr "OUTPUT"
 
-#: danmaku2ass.py:736
+#: danmaku2ass.py:734
 msgid "Output file"
 msgstr "Output file"
 
-#: danmaku2ass.py:737
+#: danmaku2ass.py:735
 msgid "WIDTHxHEIGHT"
 msgstr "WIDTHxHEIGHT"
 
-#: danmaku2ass.py:737
+#: danmaku2ass.py:735
 msgid "Stage size in pixels"
 msgstr "Stage size in pixels"
 
-#: danmaku2ass.py:738
+#: danmaku2ass.py:736
 msgid "FONT"
 msgstr "FONT"
 
-#: danmaku2ass.py:738
+#: danmaku2ass.py:736
 #, python-format
 msgid "Specify font face [default: %s]"
 msgstr "Specify font face [default: %s]"
 
-#: danmaku2ass.py:739
+#: danmaku2ass.py:737
 msgid "SIZE"
 msgstr "SIZE"
 
-#: danmaku2ass.py:739
+#: danmaku2ass.py:737
 #, python-format
 msgid "Default font size [default: %s]"
 msgstr "Default font size [default: %s]"
 
-#: danmaku2ass.py:740
+#: danmaku2ass.py:738
 msgid "ALPHA"
 msgstr "ALPHA"
 
-#: danmaku2ass.py:740
+#: danmaku2ass.py:738
 msgid "Text opaque"
 msgstr "Text opaque"
 
-#: danmaku2ass.py:741
+#: danmaku2ass.py:739
 msgid "SECONDS"
 msgstr "SECONDS"
 
-#: danmaku2ass.py:741
+#: danmaku2ass.py:739
 #, python-format
 msgid "Duration of comment display [default: %s]"
 msgstr "Duration of comment display [default: %s]"
 
-#: danmaku2ass.py:742
+#: danmaku2ass.py:740
 msgid "HEIGHT"
 msgstr "HEIGHT"
 
-#: danmaku2ass.py:742
+#: danmaku2ass.py:740
 msgid "Reserve blank on the bottom of the stage"
 msgstr "Reserve blank on the bottom of the stage"
 
-#: danmaku2ass.py:743
+#: danmaku2ass.py:741
 msgid "Reduce the amount of comments if stage is full"
 msgstr "Reduce the amount of comments if stage is full"
 
-#: danmaku2ass.py:744
+#: danmaku2ass.py:742
 msgid "FILE"
 msgstr "FILE"
 
-#: danmaku2ass.py:744
+#: danmaku2ass.py:742
 msgid "Comment file to be processed"
 msgstr "Comment file to be processed"
 
-#: danmaku2ass.py:751
+#: danmaku2ass.py:749
 #, python-format
 msgid "Invalid stage size: %r"
 msgstr "Invalid stage size: %r"
diff --git a/locale/ja/LC_MESSAGES/danmaku2ass.mo b/locale/ja/LC_MESSAGES/danmaku2ass.mo
index e9df78b..dbba55a 100644
Binary files a/locale/ja/LC_MESSAGES/danmaku2ass.mo and b/locale/ja/LC_MESSAGES/danmaku2ass.mo differ
diff --git a/locale/ja/LC_MESSAGES/danmaku2ass.po b/locale/ja/LC_MESSAGES/danmaku2ass.po
index 816d6ef..9c3b0cc 100644
--- a/locale/ja/LC_MESSAGES/danmaku2ass.po
+++ b/locale/ja/LC_MESSAGES/danmaku2ass.po
@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Danmaku2ASS\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2014-02-02 18:51+0800\n"
+"POT-Creation-Date: 2014-02-03 16:50+0800\n"
 "Last-Translator: Star Brilliant <m13253@hotmail.com>\n"
 "Language: ja\n"
 "MIME-Version: 1.0\n"
@@ -15,92 +15,92 @@ msgid "Invalid comment: %s"
 msgstr "無効なコメント：%s"
 
 #: danmaku2ass.py:158 danmaku2ass.py:192 danmaku2ass.py:235 danmaku2ass.py:317
-#: danmaku2ass.py:319 danmaku2ass.py:436 danmaku2ass.py:483 danmaku2ass.py:540
+#: danmaku2ass.py:319 danmaku2ass.py:437 danmaku2ass.py:480 danmaku2ass.py:538
 #, python-format
 msgid "Invalid comment: %r"
 msgstr "無効なコメント：%r"
 
-#: danmaku2ass.py:690 danmaku2ass.py:738
+#: danmaku2ass.py:688 danmaku2ass.py:736
 msgid "(FONT) sans-serif"
 msgstr "(FONT) MS PGothic"
 
-#: danmaku2ass.py:719
+#: danmaku2ass.py:717
 #, python-format
 msgid "Unknown comment file format: %s"
 msgstr "未知のコメントファイル形式：%s"
 
-#: danmaku2ass.py:736
+#: danmaku2ass.py:734
 msgid "OUTPUT"
 msgstr "出力"
 
-#: danmaku2ass.py:736
+#: danmaku2ass.py:734
 msgid "Output file"
 msgstr "出力ファイル"
 
-#: danmaku2ass.py:737
+#: danmaku2ass.py:735
 msgid "WIDTHxHEIGHT"
 msgstr "幅x高"
 
-#: danmaku2ass.py:737
+#: danmaku2ass.py:735
 msgid "Stage size in pixels"
 msgstr "ピクセル単位でステージのサイズ"
 
-#: danmaku2ass.py:738
+#: danmaku2ass.py:736
 msgid "FONT"
 msgstr "フォント"
 
-#: danmaku2ass.py:738
+#: danmaku2ass.py:736
 #, python-format
 msgid "Specify font face [default: %s]"
 msgstr "フォントを指定する [デフォルト: %s]"
 
-#: danmaku2ass.py:739
+#: danmaku2ass.py:737
 msgid "SIZE"
 msgstr "サイズ"
 
-#: danmaku2ass.py:739
+#: danmaku2ass.py:737
 #, python-format
 msgid "Default font size [default: %s]"
 msgstr "デフォルトのフォントサイズ [デフォルト: %s]"
 
-#: danmaku2ass.py:740
+#: danmaku2ass.py:738
 msgid "ALPHA"
 msgstr "アルファ"
 
-#: danmaku2ass.py:740
+#: danmaku2ass.py:738
 msgid "Text opaque"
 msgstr "テキストの不透明度"
 
-#: danmaku2ass.py:741
+#: danmaku2ass.py:739
 msgid "SECONDS"
 msgstr "秒数"
 
-#: danmaku2ass.py:741
+#: danmaku2ass.py:739
 #, python-format
 msgid "Duration of comment display [default: %s]"
 msgstr "コメント表示の時間 [デフォルト: %s]"
 
-#: danmaku2ass.py:742
+#: danmaku2ass.py:740
 msgid "HEIGHT"
 msgstr "高度"
 
-#: danmaku2ass.py:742
+#: danmaku2ass.py:740
 msgid "Reserve blank on the bottom of the stage"
 msgstr "ステージの下にブランクを予備する"
 
-#: danmaku2ass.py:743
+#: danmaku2ass.py:741
 msgid "Reduce the amount of comments if stage is full"
 msgstr "ステージがいっぱいになったのときにコメントの量を減らす"
 
-#: danmaku2ass.py:744
+#: danmaku2ass.py:742
 msgid "FILE"
 msgstr "ファイル"
 
-#: danmaku2ass.py:744
+#: danmaku2ass.py:742
 msgid "Comment file to be processed"
 msgstr "ファイルが処理されるコメント"
 
-#: danmaku2ass.py:751
+#: danmaku2ass.py:749
 #, python-format
 msgid "Invalid stage size: %r"
 msgstr "無効なステージサイズ：%r"
diff --git a/locale/zh_CN/LC_MESSAGES/danmaku2ass.mo b/locale/zh_CN/LC_MESSAGES/danmaku2ass.mo
index 742735a..7758444 100644
Binary files a/locale/zh_CN/LC_MESSAGES/danmaku2ass.mo and b/locale/zh_CN/LC_MESSAGES/danmaku2ass.mo differ
diff --git a/locale/zh_CN/LC_MESSAGES/danmaku2ass.po b/locale/zh_CN/LC_MESSAGES/danmaku2ass.po
index 20afdfb..dcfb399 100644
--- a/locale/zh_CN/LC_MESSAGES/danmaku2ass.po
+++ b/locale/zh_CN/LC_MESSAGES/danmaku2ass.po
@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Danmaku2ASS\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2014-02-02 18:51+0800\n"
+"POT-Creation-Date: 2014-02-03 16:50+0800\n"
 "Last-Translator: Star Brilliant <m13253@hotmail.com>\n"
 "Language: zh_CN\n"
 "MIME-Version: 1.0\n"
@@ -15,92 +15,92 @@ msgid "Invalid comment: %s"
 msgstr "无效弹幕：%s"
 
 #: danmaku2ass.py:158 danmaku2ass.py:192 danmaku2ass.py:235 danmaku2ass.py:317
-#: danmaku2ass.py:319 danmaku2ass.py:436 danmaku2ass.py:483 danmaku2ass.py:540
+#: danmaku2ass.py:319 danmaku2ass.py:437 danmaku2ass.py:480 danmaku2ass.py:538
 #, python-format
 msgid "Invalid comment: %r"
 msgstr "无效弹幕：%r"
 
-#: danmaku2ass.py:690 danmaku2ass.py:738
+#: danmaku2ass.py:688 danmaku2ass.py:736
 msgid "(FONT) sans-serif"
 msgstr "(FONT) SimHei"
 
-#: danmaku2ass.py:719
+#: danmaku2ass.py:717
 #, python-format
 msgid "Unknown comment file format: %s"
 msgstr "未知的弹幕文件格式：%s"
 
-#: danmaku2ass.py:736
+#: danmaku2ass.py:734
 msgid "OUTPUT"
 msgstr "输出"
 
-#: danmaku2ass.py:736
+#: danmaku2ass.py:734
 msgid "Output file"
 msgstr "输出文件"
 
-#: danmaku2ass.py:737
+#: danmaku2ass.py:735
 msgid "WIDTHxHEIGHT"
 msgstr "宽x高"
 
-#: danmaku2ass.py:737
+#: danmaku2ass.py:735
 msgid "Stage size in pixels"
 msgstr "舞台尺寸的像素数目"
 
-#: danmaku2ass.py:738
+#: danmaku2ass.py:736
 msgid "FONT"
 msgstr "字体"
 
-#: danmaku2ass.py:738
+#: danmaku2ass.py:736
 #, python-format
 msgid "Specify font face [default: %s]"
 msgstr "指定字体名称 [默认: %s]"
 
-#: danmaku2ass.py:739
+#: danmaku2ass.py:737
 msgid "SIZE"
 msgstr "尺寸"
 
-#: danmaku2ass.py:739
+#: danmaku2ass.py:737
 #, python-format
 msgid "Default font size [default: %s]"
 msgstr "默认字号 [默认: %s]"
 
-#: danmaku2ass.py:740
+#: danmaku2ass.py:738
 msgid "ALPHA"
 msgstr "ALPHA"
 
-#: danmaku2ass.py:740
+#: danmaku2ass.py:738
 msgid "Text opaque"
 msgstr "文字不透明度"
 
-#: danmaku2ass.py:741
+#: danmaku2ass.py:739
 msgid "SECONDS"
 msgstr "秒数"
 
-#: danmaku2ass.py:741
+#: danmaku2ass.py:739
 #, python-format
 msgid "Duration of comment display [default: %s]"
 msgstr "弹幕显示时长 [默认: %s]"
 
-#: danmaku2ass.py:742
+#: danmaku2ass.py:740
 msgid "HEIGHT"
 msgstr "高度"
 
-#: danmaku2ass.py:742
+#: danmaku2ass.py:740
 msgid "Reserve blank on the bottom of the stage"
 msgstr "在舞台底部预留空位"
 
-#: danmaku2ass.py:743
+#: danmaku2ass.py:741
 msgid "Reduce the amount of comments if stage is full"
 msgstr "在舞台满时减少弹幕数量"
 
-#: danmaku2ass.py:744
+#: danmaku2ass.py:742
 msgid "FILE"
 msgstr "文件"
 
-#: danmaku2ass.py:744
+#: danmaku2ass.py:742
 msgid "Comment file to be processed"
 msgstr "将要处理的弹幕文件"
 
-#: danmaku2ass.py:751
+#: danmaku2ass.py:749
 #, python-format
 msgid "Invalid stage size: %r"
 msgstr "无效舞台尺寸：%r"
diff --git a/locale/zh_TW/LC_MESSAGES/danmaku2ass.mo b/locale/zh_TW/LC_MESSAGES/danmaku2ass.mo
index 6a22c73..994a848 100644
Binary files a/locale/zh_TW/LC_MESSAGES/danmaku2ass.mo and b/locale/zh_TW/LC_MESSAGES/danmaku2ass.mo differ
diff --git a/locale/zh_TW/LC_MESSAGES/danmaku2ass.po b/locale/zh_TW/LC_MESSAGES/danmaku2ass.po
index 124d802..17dd8f3 100644
--- a/locale/zh_TW/LC_MESSAGES/danmaku2ass.po
+++ b/locale/zh_TW/LC_MESSAGES/danmaku2ass.po
@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Danmaku2ASS\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2014-02-02 18:51+0800\n"
+"POT-Creation-Date: 2014-02-03 16:50+0800\n"
 "Last-Translator: Star Brilliant <m13253@hotmail.com>\n"
 "Language: zh_TW\n"
 "MIME-Version: 1.0\n"
@@ -15,92 +15,92 @@ msgid "Invalid comment: %s"
 msgstr "無效彈幕：%s"
 
 #: danmaku2ass.py:158 danmaku2ass.py:192 danmaku2ass.py:235 danmaku2ass.py:317
-#: danmaku2ass.py:319 danmaku2ass.py:436 danmaku2ass.py:483 danmaku2ass.py:540
+#: danmaku2ass.py:319 danmaku2ass.py:437 danmaku2ass.py:480 danmaku2ass.py:538
 #, python-format
 msgid "Invalid comment: %r"
 msgstr "無效彈幕：%r"
 
-#: danmaku2ass.py:690 danmaku2ass.py:738
+#: danmaku2ass.py:688 danmaku2ass.py:736
 msgid "(FONT) sans-serif"
 msgstr "(FONT) Microsoft JhengHei"
 
-#: danmaku2ass.py:719
+#: danmaku2ass.py:717
 #, python-format
 msgid "Unknown comment file format: %s"
 msgstr "未知的彈幕檔案格式：%s"
 
-#: danmaku2ass.py:736
+#: danmaku2ass.py:734
 msgid "OUTPUT"
 msgstr "輸出"
 
-#: danmaku2ass.py:736
+#: danmaku2ass.py:734
 msgid "Output file"
 msgstr "輸出檔案"
 
-#: danmaku2ass.py:737
+#: danmaku2ass.py:735
 msgid "WIDTHxHEIGHT"
 msgstr "寬x高"
 
-#: danmaku2ass.py:737
+#: danmaku2ass.py:735
 msgid "Stage size in pixels"
 msgstr "舞臺尺寸的畫素數目"
 
-#: danmaku2ass.py:738
+#: danmaku2ass.py:736
 msgid "FONT"
 msgstr "字型"
 
-#: danmaku2ass.py:738
+#: danmaku2ass.py:736
 #, python-format
 msgid "Specify font face [default: %s]"
 msgstr "指定字型名稱 [默認: %s]"
 
-#: danmaku2ass.py:739
+#: danmaku2ass.py:737
 msgid "SIZE"
 msgstr "尺寸"
 
-#: danmaku2ass.py:739
+#: danmaku2ass.py:737
 #, python-format
 msgid "Default font size [default: %s]"
 msgstr "默認字型大小 [默認: %s]"
 
-#: danmaku2ass.py:740
+#: danmaku2ass.py:738
 msgid "ALPHA"
 msgstr "ALPHA"
 
-#: danmaku2ass.py:740
+#: danmaku2ass.py:738
 msgid "Text opaque"
 msgstr "文字不透明度"
 
-#: danmaku2ass.py:741
+#: danmaku2ass.py:739
 msgid "SECONDS"
 msgstr "秒數"
 
-#: danmaku2ass.py:741
+#: danmaku2ass.py:739
 #, python-format
 msgid "Duration of comment display [default: %s]"
 msgstr "彈幕顯示時長 [默認: %s]"
 
-#: danmaku2ass.py:742
+#: danmaku2ass.py:740
 msgid "HEIGHT"
 msgstr "高度"
 
-#: danmaku2ass.py:742
+#: danmaku2ass.py:740
 msgid "Reserve blank on the bottom of the stage"
 msgstr "在舞臺底部預留空位"
 
-#: danmaku2ass.py:743
+#: danmaku2ass.py:741
 msgid "Reduce the amount of comments if stage is full"
 msgstr "在舞臺滿時減少彈幕數量"
 
-#: danmaku2ass.py:744
+#: danmaku2ass.py:742
 msgid "FILE"
 msgstr "檔案"
 
-#: danmaku2ass.py:744
+#: danmaku2ass.py:742
 msgid "Comment file to be processed"
 msgstr "將要處理的彈幕檔案"
 
-#: danmaku2ass.py:751
+#: danmaku2ass.py:749
 #, python-format
 msgid "Invalid stage size: %r"
 msgstr "無效舞臺尺寸：%r"