Patch provided by Adam (ajk48n). It reverses the turntable rotation when

you have the view 'upside down', resulting in correct feedback.

1 files changed, 6 insertions, 2 deletions

diff --git a/source/blender/src/view.c b/source/blender/src/view.c
index 3304f71c79b..bd0e9f21e46 100644
--- a/source/blender/src/view.c
+++ b/source/blender/src/view.c
@@ -436,7 +436,7 @@ void viewmove(int mode)
 {
 	Object *ob = OBACT;
 	float firstvec[3], newvec[3], dvec[3];
-	float oldquat[4], q1[4], si, phi, dist0;
+	float reverse, oldquat[4], q1[4], si, phi, dist0;
 	float ofs[3], obofs[3];
 	int firsttime=1;
 	short mvalball[2], mval[2], mvalo[2];
@@ -471,6 +471,10 @@ void viewmove(int mode)
 		}
 	}
 
+	reverse= 1.0f;
+	if (G.vd->persmat[2][1] < 0.0f)
+		reverse= -1.0f;
+
 	while(TRUE) {
 		getmouseco_sc(mval);
 		
@@ -580,7 +584,7 @@ void viewmove(int mode)
 					}
 
 					/* Perform the orbital rotation */
-					phi = sensitivity * (mval[0] - mvalo[0]);
+					phi = sensitivity * reverse * (mval[0] - mvalo[0]);
 					q1[0] = cos(phi);
 					q1[1] = q1[2] = 0.0;
 					q1[3] = sin(phi);