From a88807b6dd3d67c3706bf69a9811b30702bb531a Mon Sep 17 00:00:00 2001
From: Tom Musgrove <LetterRip@gmail.com>
Date: Sun, 1 Oct 2006 16:49:41 +0000
Subject: ==Mat4ToEul==

a utility function to convert 4x4 matrices to a euler rotation, contributed by Joshua Lueng (aligorith)
---
 source/blender/blenlib/BLI_arithb.h    | 6 ++++++
 source/blender/blenlib/intern/arithb.c | 9 +++++++++
 2 files changed, 15 insertions(+)

(limited to 'source')

diff --git a/source/blender/blenlib/BLI_arithb.h b/source/blender/blenlib/BLI_arithb.h
index 1fab2c68458..bb2c7f0ec83 100644
--- a/source/blender/blenlib/BLI_arithb.h
+++ b/source/blender/blenlib/BLI_arithb.h
@@ -155,6 +155,12 @@ Mat3ToEul(
 	float *eul
 );
 
+	void 
+Mat4ToEul(
+	float tmat[][4],
+	float *eul
+);
+
 void compatible_eul(float *eul, float *oldrot);
 
 void Mat3ToCompatibleEul(float mat[][3], float *eul, float *oldrot);
diff --git a/source/blender/blenlib/intern/arithb.c b/source/blender/blenlib/intern/arithb.c
index 3f687a9f780..40cf72f4242 100644
--- a/source/blender/blenlib/intern/arithb.c
+++ b/source/blender/blenlib/intern/arithb.c
@@ -2215,6 +2215,15 @@ void Mat3ToEul(float tmat[][3], float *eul)
 	}
 }
 
+void Mat4ToEul(float tmat[][4], float *eul)
+{
+	float tempMat[3][3];
+
+	Mat3CpyMat4 (tempMat, tmat);
+	Mat3Ortho(tempMat);
+	Mat3ToEul(tempMat, eul);
+}
+
 void QuatToEul( float *quat, float *eul)
 {
 	float mat[3][3];
-- 
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