Reduce Bezier Curve AlphaFunction's tolerance

Previously, we use the tolerance of T value as 0.001f.
That mean, In 4K system, the error range of result can be ~2 pixels.

Let we squeeze the tolerance so reduce the numeric error.

Change-Id: I7d08de0bce8f2bac3441cb8a0bd4e5b55a31b989
Signed-off-by: Eunki, Hong <eunkiki.hong@samsung.com>

diff --git a/dali/internal/update/animation/scene-graph-animator.h b/dali/internal/update/animation/scene-graph-animator.h
index 391bacf..46d0a88 100644 (file)
--- a/dali/internal/update/animation/scene-graph-animator.h
+++ b/dali/internal/update/animation/scene-graph-animator.h
@@ -357,7 +357,7 @@ public:
       {
         Dali::Vector4 controlPoints = mAlphaFunction.GetBezierControlPoints();
 
-        static const float tolerance = 0.001f; //10 iteration max
+        static const float tolerance = 0.00005f; // 15 iteration max
 
         //Perform a binary search on the curve
         float lowerBound(0.0f);