Spline: Fix monotonicity constraint

Test: comparison of code to formula Change-Id: Ie7c8b3a2a6bc64ea3c837a6674b55c07fe49e12b
2017-02-10 13:16:45 -08:00
parent 30110eaeec
commit 50fb1aebd7
1 changed files with 3 additions and 3 deletions
--- a/core/java/android/util/Spline.java
+++ b/core/java/android/util/Spline.java
@@ -166,10 +166,10 @@ public abstract class Spline {
                                + "monotonic Y values.");
                    }
                    float h = (float) Math.hypot(a, b);
-                    if (h > 9f) {
+                    if (h > 3f) {
                        float t = 3f / h;
-                        m[i] = t * a * d[i];
-                        m[i + 1] = t * b * d[i];
+                        m[i] *= t;
+                        m[i + 1] *= t;
                    }
                }
            }