From f598670da85d17297e4258972ec209dafc135e40 Mon Sep 17 00:00:00 2001
From: Star Brilliant <m13253@hotmail.com>
Date: Mon, 28 Apr 2014 23:12:36 +0800
Subject: [PATCH] Experimental rotation conversion

---
 danmaku2ass.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/danmaku2ass.py b/danmaku2ass.py
index dc6fd40..9ac3b20 100755
--- a/danmaku2ass.py
+++ b/danmaku2ass.py
@@ -549,7 +549,7 @@ def ConvertFlashRotation(rotY, rotZ, X, Y, FOV=math.tan(2*math.pi/9.0)):
         outZ = math.atan2(-math.cos(rotY)*math.sin(rotZ), math.cos(rotZ))*180/math.pi
         #outX = math.asin(math.sin(rotY)*math.sin(rotZ))*180/math.pi
         #outX = math.acos(math.cos(rotY)/math.cos(outY*math.pi/180.0))*180/math.pi
-        outX = math.atan2(-math.sin(rotY)*math.cos(rotZ)*math.cos(outY*math.pi/180.0), math.cos(rotY)*math.sin(outY*math.pi/180.0))*180/math.pi
+        outX = math.atan2(-math.sin(rotY)*math.cos(rotZ)*abs(math.cos(outY*math.pi/180.0)*(1 if math.sin(outY*math.pi/180.0) >= 0 else -1)), math.cos(rotY)*abs(math.sin(outY*math.pi/180.0)*(1 if math.cos(outY*math.pi/180.0) >= 0 else -1)))*180/math.pi
         '''
         print(
             (rotY*180.0/math.pi, rotZ*180.0/math.pi),