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Commit a181bb4b authored by Justin Ho's avatar Justin Ho
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Tuning Overscroller's scroll curve 

Softer end + rounder curve with less contrast
Bug: 5200575

Change-Id: Icff6ba3cf7ae052c80b2e80e2d2b07085fcb40ce
parent 4f92c9bb

core/java/android/widget/OverScroller.java

+4 −4
Original line number Diff line number Diff line
@@ -584,10 +584,10 @@ public class OverScroller { 
        // A device specific coefficient adjusted to physical values.

        private static float PHYSICAL_COEF;



        private static float DECELERATION_RATE = (float) (Math.log(0.75) / Math.log(0.9));

        private static final float INFLEXION = 0.4f; // Tension lines cross at (INFLEXION, 1)

        private static final float START_TENSION = 1.0f;

        private static final float END_TENSION = 0.6666f;

        private static float DECELERATION_RATE = (float) (Math.log(0.78) / Math.log(0.9));

        private static final float INFLEXION = 0.35f; // Tension lines cross at (INFLEXION, 1)

        private static final float START_TENSION = 0.5f;

        private static final float END_TENSION = 1.0f;

        private static final float P1 = START_TENSION * INFLEXION;

        private static final float P2 = 1.0f - END_TENSION * (1.0f - INFLEXION);