[gimp] Bug 760737 - Brush angle jumps when tablet pen is tilted horizontally.

[Jehan Pagès <jehanp src gnome org>]

commit bb1785396f50a433bee9a6d01d2e58caf87c0299
Author: Jeremiah Darais <mail jeremiahdarais com>
Date:   Sat Jan 16 21:20:26 2016 -0800

    Bug 760737 - Brush angle jumps when tablet pen is tilted horizontally.
    
    Fix cursor rotation jump when tablet pen is tilted horizontally.
    This changes to the correct values for the special case of tilt_x == 0.0.
    
    Reviewer (Jehan)'s note: computing the convergence of the tilt function
    in the `else` block, when tilt_x approaches 0, tilt value indeed
    converges to 0.25 with tilt_y > 0 and 0.75 (or -0.25 which is the same)
    with tilt_y < 0.

 app/core/gimpdynamicsoutput.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/app/core/gimpdynamicsoutput.c b/app/core/gimpdynamicsoutput.c
index 451e173..9bb1eb3 100644
--- a/app/core/gimpdynamicsoutput.c
+++ b/app/core/gimpdynamicsoutput.c
@@ -570,9 +570,9 @@ gimp_dynamics_output_get_angular_value (GimpDynamicsOutput *output,
       if (tilt_x == 0.0)
         {
           if (tilt_y >= 0.0)
-            tilt = 0.5;
+            tilt = 0.25;
           else if (tilt_y < 0.0)
-            tilt = 0.0;
+            tilt = 0.75;
           else
             tilt = -1.0;
         }