Remove usages of FloatMath

Bug: https://code.google.com/p/android/issues/detail?id=36199
Change-Id: Iec8fb663ed54eb967050f6ff25a36ba534204c4d

8 files changed, 32 insertions, 45 deletions

diff --git a/core/java/android/transition/ArcMotion.java b/core/java/android/transition/ArcMotion.java
index f95fb49..70dfe7f 100644
--- a/core/java/android/transition/ArcMotion.java
+++ b/core/java/android/transition/ArcMotion.java
@@ -21,7 +21,6 @@ import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Path;
 import android.util.AttributeSet;
-import android.util.FloatMath;
 
 /**
  * A PathMotion that generates a curved path along an arc on an imaginary circle containing
@@ -257,7 +256,7 @@ public class ArcMotion extends PathMotion {
             }
             if (newArcDistance2 != 0) {
                 float ratio2 = newArcDistance2 / arcDist2;
-                float ratio = FloatMath.sqrt(ratio2);
+                float ratio = (float) Math.sqrt(ratio2);
                 ex = dx + (ratio * (ex - dx));
                 ey = dy + (ratio * (ey - dy));
             }
diff --git a/core/java/android/transition/CircularPropagation.java b/core/java/android/transition/CircularPropagation.java
index 51beb51..1e44cfa 100644
--- a/core/java/android/transition/CircularPropagation.java
+++ b/core/java/android/transition/CircularPropagation.java
@@ -16,7 +16,6 @@
 package android.transition;
 
 import android.graphics.Rect;
-import android.util.FloatMath;
 import android.util.Log;
 import android.view.View;
 import android.view.ViewGroup;
@@ -87,9 +86,9 @@ public class CircularPropagation extends VisibilityPropagation {
             epicenterY = Math.round(loc[1] + (sceneRoot.getHeight() / 2)
                     + sceneRoot.getTranslationY());
         }
-        float distance = distance(viewCenterX, viewCenterY, epicenterX, epicenterY);
-        float maxDistance = distance(0, 0, sceneRoot.getWidth(), sceneRoot.getHeight());
-        float distanceFraction = distance/maxDistance;
+        double distance = distance(viewCenterX, viewCenterY, epicenterX, epicenterY);
+        double maxDistance = distance(0, 0, sceneRoot.getWidth(), sceneRoot.getHeight());
+        double distanceFraction = distance/maxDistance;
 
         long duration = transition.getDuration();
         if (duration < 0) {
@@ -99,9 +98,9 @@ public class CircularPropagation extends VisibilityPropagation {
         return Math.round(duration * directionMultiplier / mPropagationSpeed * distanceFraction);
     }
 
-    private static float distance(float x1, float y1, float x2, float y2) {
-        float x = x2 - x1;
-        float y = y2 - y1;
-        return FloatMath.sqrt((x * x) + (y * y));
+    private static double distance(float x1, float y1, float x2, float y2) {
+        double x = x2 - x1;
+        double y = y2 - y1;
+        return Math.hypot(x, y);
     }
 }
diff --git a/core/java/android/transition/Explode.java b/core/java/android/transition/Explode.java
index 0ccdf15..788676a 100644
--- a/core/java/android/transition/Explode.java
+++ b/core/java/android/transition/Explode.java
@@ -22,7 +22,6 @@ import android.animation.TimeInterpolator;
 import android.content.Context;
 import android.graphics.Rect;
 import android.util.AttributeSet;
-import android.util.FloatMath;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.animation.AccelerateInterpolator;
@@ -143,32 +142,29 @@ public class Explode extends Visibility {
 
         int centerX = bounds.centerX();
         int centerY = bounds.centerY();
-        float xVector = centerX - focalX;
-        float yVector = centerY - focalY;
+        double xVector = centerX - focalX;
+        double yVector = centerY - focalY;
 
         if (xVector == 0 && yVector == 0) {
             // Random direction when View is centered on focal View.
-            xVector = (float) (Math.random() * 2) - 1;
-            yVector = (float) (Math.random() * 2) - 1;
+            xVector = (Math.random() * 2) - 1;
+            yVector = (Math.random() * 2) - 1;
         }
-        float vectorSize = calculateDistance(xVector, yVector);
+        double vectorSize = Math.hypot(xVector, yVector);
         xVector /= vectorSize;
         yVector /= vectorSize;
 
-        float maxDistance =
+        double maxDistance =
                 calculateMaxDistance(sceneRoot, focalX - sceneRootX, focalY - sceneRootY);
 
-        outVector[0] = Math.round(maxDistance * xVector);
-        outVector[1] = Math.round(maxDistance * yVector);
+        outVector[0] = (int) Math.round(maxDistance * xVector);
+        outVector[1] = (int) Math.round(maxDistance * yVector);
     }
 
-    private static float calculateMaxDistance(View sceneRoot, int focalX, int focalY) {
+    private static double calculateMaxDistance(View sceneRoot, int focalX, int focalY) {
         int maxX = Math.max(focalX, sceneRoot.getWidth() - focalX);
         int maxY = Math.max(focalY, sceneRoot.getHeight() - focalY);
-        return calculateDistance(maxX, maxY);
+        return Math.hypot(maxX, maxY);
     }
 
-    private static float calculateDistance(float x, float y) {
-        return FloatMath.sqrt((x * x) + (y * y));
-    }
 }
diff --git a/core/java/android/transition/PatternPathMotion.java b/core/java/android/transition/PatternPathMotion.java
index a609df6..773c387 100644
--- a/core/java/android/transition/PatternPathMotion.java
+++ b/core/java/android/transition/PatternPathMotion.java
@@ -23,7 +23,6 @@ import android.graphics.Matrix;
 import android.graphics.Path;
 import android.graphics.PathMeasure;
 import android.util.AttributeSet;
-import android.util.FloatMath;
 import android.util.PathParser;
 
 /**
@@ -119,7 +118,7 @@ public class PatternPathMotion extends PathMotion {
         mTempMatrix.setTranslate(-startX, -startY);
         float dx = endX - startX;
         float dy = endY - startY;
-        float distance = distance(dx, dy);
+        float distance = (float) Math.hypot(dx, dy);
         float scale = 1 / distance;
         mTempMatrix.postScale(scale, scale);
         double angle = Math.atan2(dy, dx);
@@ -130,9 +129,9 @@ public class PatternPathMotion extends PathMotion {
 
     @Override
     public Path getPath(float startX, float startY, float endX, float endY) {
-        float dx = endX - startX;
-        float dy = endY - startY;
-        float length = distance(dx, dy);
+        double dx = endX - startX;
+        double dy = endY - startY;
+        float length = (float) Math.hypot(dx, dy);
         double angle = Math.atan2(dy, dx);
 
         mTempMatrix.setScale(length, length);
@@ -143,7 +142,4 @@ public class PatternPathMotion extends PathMotion {
         return path;
     }
 
-    private static float distance(float x, float y) {
-        return FloatMath.sqrt((x * x) + (y * y));
-    }
 }
diff --git a/core/java/android/transition/SidePropagation.java b/core/java/android/transition/SidePropagation.java
index 623cdd1..46df2a8 100644
--- a/core/java/android/transition/SidePropagation.java
+++ b/core/java/android/transition/SidePropagation.java
@@ -16,7 +16,6 @@
 package android.transition;
 
 import android.graphics.Rect;
-import android.util.FloatMath;
 import android.util.Log;
 import android.view.Gravity;
 import android.view.View;
diff --git a/core/java/android/util/Spline.java b/core/java/android/util/Spline.java
index 41a2e5d..bed3a60 100644
--- a/core/java/android/util/Spline.java
+++ b/core/java/android/util/Spline.java
@@ -165,7 +165,7 @@ public abstract class Spline {
                         throw new IllegalArgumentException("The control points must have "
                                 + "monotonic Y values.");
                     }
-                    float h = FloatMath.hypot(a, b);
+                    float h = (float) Math.hypot(a, b);
                     if (h > 9f) {
                         float t = 3f / h;
                         m[i] = t * a * d[i];
diff --git a/core/java/android/widget/EdgeEffect.java b/core/java/android/widget/EdgeEffect.java
index 6925756..391347e 100644
--- a/core/java/android/widget/EdgeEffect.java
+++ b/core/java/android/widget/EdgeEffect.java
@@ -24,7 +24,6 @@ import android.graphics.Rect;
 
 import android.content.Context;
 import android.graphics.Canvas;
-import android.util.FloatMath;
 import android.view.animation.AnimationUtils;
 import android.view.animation.DecelerateInterpolator;
 import android.view.animation.Interpolator;
@@ -220,8 +219,8 @@ public class EdgeEffect {
         if (mPullDistance == 0) {
             mGlowScaleY = mGlowScaleYStart = 0;
         } else {
-            final float scale = Math.max(0, 1 - 1 /
-                    FloatMath.sqrt(Math.abs(mPullDistance) * mBounds.height()) - 0.3f) / 0.7f;
+            final float scale = (float) (Math.max(0, 1 - 1 /
+                    Math.sqrt(Math.abs(mPullDistance) * mBounds.height()) - 0.3d) / 0.7d);
 
             mGlowScaleY = mGlowScaleYStart = scale;
         }
diff --git a/services/core/java/com/android/server/display/ColorFade.java b/services/core/java/com/android/server/display/ColorFade.java
index f549f3d..d68b5cb 100644
--- a/services/core/java/com/android/server/display/ColorFade.java
+++ b/services/core/java/com/android/server/display/ColorFade.java
@@ -37,7 +37,6 @@ import android.opengl.EGLDisplay;
 import android.opengl.EGLSurface;
 import android.opengl.GLES20;
 import android.opengl.GLES11Ext;
-import android.util.FloatMath;
 import android.util.Slog;
 import android.view.DisplayInfo;
 import android.view.Surface.OutOfResourcesException;
@@ -372,13 +371,13 @@ final class ColorFade {
             GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
 
             // Draw the frame.
-            float one_minus_level = 1 - level;
-            float cos = FloatMath.cos((float)Math.PI * one_minus_level);
-            float sign = cos < 0 ? -1 : 1;
-            float opacity = -FloatMath.pow(one_minus_level, 2) + 1;
-            float saturation = FloatMath.pow(level, 4);
-            float scale = (-FloatMath.pow(one_minus_level, 2) + 1) * 0.1f + 0.9f;
-            float gamma = (0.5f * sign * FloatMath.pow(cos, 2) + 0.5f) * 0.9f + 0.1f;
+            double one_minus_level = 1 - level;
+            double cos = Math.cos(Math.PI * one_minus_level);
+            double sign = cos < 0 ? -1 : 1;
+            float opacity = (float) -Math.pow(one_minus_level, 2) + 1;
+            float saturation = (float) Math.pow(level, 4);
+            float scale = (float) ((-Math.pow(one_minus_level, 2) + 1) * 0.1d + 0.9d);
+            float gamma = (float) ((0.5d * sign * Math.pow(cos, 2) + 0.5d) * 0.9d + 0.1d);
             drawFaded(opacity, 1.f / gamma, saturation, scale);
             if (checkGlErrors("drawFrame")) {
                 return false;