java.lang.Math.hypot()方法的使用及代码示例

x33g5p2x  于2022-01-16 转载在 其他  
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本文整理了Java中java.lang.Math.hypot()方法的一些代码示例，展示了Math.hypot()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Math.hypot()方法的具体详情如下：
包路径：java.lang.Math
类名称：Math
方法名：hypot

Math.hypot介绍

[英]Returns sqrt(x 2 + y 2 ). The final result is without medium underflow or overflow. The returned result is within 1 ulp (unit in the last place) of the real result. If one parameter remains constant, the result should be semi-monotonic.

Special cases:

  • hypot(+infinity, (anything including NaN)) = +infinity
  • hypot(-infinity, (anything including NaN)) = +infinity
  • hypot((anything including NaN), +infinity) = +infinity
  • hypot((anything including NaN), -infinity) = +infinity
  • hypot(NaN, NaN) = NaN
    [中]

代码示例

代码示例来源：origin: PhilJay/MPAndroidChart

  1. /**
  2.  * Calculates the distance between the two given points.
  3.  *
  4.  * @param x1
  5.  * @param y1
  6.  * @param x2
  7.  * @param y2
  8.  * @return
  9.  */
  10. protected float getDistance(float x1, float y1, float x2, float y2) {
  11.   //return Math.abs(y1 - y2);
  12.   //return Math.abs(x1 - x2);
  13.   return (float) Math.hypot(x1 - x2, y1 - y2);
  14. }

代码示例来源：origin: kevin-wayne/algs4

  1. /**
  2.  * Returns the absolute value of this complex number.
  3.  * This quantity is also known as the <em>modulus</em> or <em>magnitude</em>.
  4.  *
  5.  * @return the absolute value of this complex number
  6.  */
  7. public double abs() {
  8.   return Math.hypot(re, im);
  9. }

代码示例来源：origin: andkulikov/Transitions-Everywhere

  1. private static double distance(float x1, float y1, float x2, float y2) {
  2.     double x = x2 - x1;
  3.     double y = y2 - y1;
  4.     return Math.hypot(x, y);
  5.   }
  6. }

代码示例来源：origin: ZieIony/Carbon

  1. public static float dist(float x1, float y1, float x2, float y2) {
  2.   final float x = (x2 - x1);
  3.   final float y = (y2 - y1);
  4.   return (float) Math.hypot(x, y);
  5. }

代码示例来源：origin: apache/nifi

  1. /**
  2.  * @return distance from a (0, 0) point.
  3.  */
  4. public int distance() {
  5.   // a simplified distance formula because the other coord is (0, 0)
  6.   return (int) Math.hypot(x, y);
  7. }

代码示例来源：origin: ZieIony/Carbon

  1. public static float mag(float a, float b) {
  2.   return (float) Math.hypot(a, b);
  3. }

代码示例来源：origin: airbnb/lottie-android

  1. public static float getScale(Matrix matrix) {
  2.  points[0] = 0;
  3.  points[1] = 0;
  4.  // Use sqrt(2) so that the hypotenuse is of length 1.
  5.  points[2] = SQRT_2;
  6.  points[3] = SQRT_2;
  7.  matrix.mapPoints(points);
  8.  float dx = points[2] - points[0];
  9.  float dy = points[3] - points[1];
  10.  // TODO: figure out why the result needs to be divided by 2.
  11.  return (float) Math.hypot(dx, dy) / 2f;
  12. }

代码示例来源：origin: square/okio

  1. /**
  2.  * Returns a bitmap that lights up red subpixels at the bottom, green subpixels on the right, and
  3.  * blue subpixels in bottom-right.
  4.  */
  5. Bitmap generateGradient() {
  6.  int[][] pixels = new int[1080][1920];
  7.  for (int y = 0; y < 1080; y++) {
  8.   for (int x = 0; x < 1920; x++) {
  9.    int r = (int) (y / 1080f * 255);
  10.    int g = (int) (x / 1920f * 255);
  11.    int b = (int) ((Math.hypot(x, y) / Math.hypot(1080, 1920)) * 255);
  12.    pixels[y][x] = r << 16 | g << 8 | b;
  13.   }
  14.  }
  15.  return new Bitmap(pixels);
  16. }

代码示例来源：origin: apache/incubator-druid

  1. @Override
  2.  protected ExprEval eval(double x, double y)
  3.  {
  4.   return ExprEval.of(Math.hypot(x, y));
  5.  }
  6. }

代码示例来源：origin: andkulikov/Transitions-Everywhere

  1. private static double calculateMaxDistance(View sceneRoot, int focalX, int focalY) {
  2.   int maxX = Math.max(focalX, sceneRoot.getWidth() - focalX);
  3.   int maxY = Math.max(focalY, sceneRoot.getHeight() - focalY);
  4.   return Math.hypot(maxX, maxY);
  5. }

代码示例来源：origin: robolectric/robolectric

  1. @Implementation
  2. protected float mapRadius(float radius) {
  3.  float[] src = new float[] {radius, 0.f, 0.f, radius};
  4.  mapVectors(src, 0, src, 0, 2);
  5.  float l1 = (float) Math.hypot(src[0], src[1]);
  6.  float l2 = (float) Math.hypot(src[2], src[3]);
  7.  return (float) Math.sqrt(l1 * l2);
  8. }

代码示例来源：origin: andkulikov/Transitions-Everywhere

  1. @Override
  2. @NonNull
  3. public Path getPath(float startX, float startY, float endX, float endY) {
  4.   double dx = endX - startX;
  5.   double dy = endY - startY;
  6.   float length = (float) Math.hypot(dx, dy);
  7.   double angle = Math.atan2(dy, dx);
  8.   mTempMatrix.setScale(length, length);
  9.   mTempMatrix.postRotate((float) Math.toDegrees(angle));
  10.   mTempMatrix.postTranslate(startX, startY);
  11.   Path path = new Path();
  12.   mPatternPath.transform(mTempMatrix, path);
  13.   return path;
  14. }

代码示例来源：origin: hitherejoe/animate

  1. @TargetApi(Build.VERSION_CODES.LOLLIPOP)
  2.   private void prepareCircularReveal(View startView, View targetView) {
  3.     int centerX = (startView.getLeft() + startView.getRight()) / 2;
  4.     int centerY = (startView.getTop() + startView.getBottom()) / 2;
  5.     float finalRadius = (float) Math.hypot((double) centerX, (double) centerY);
  6.     mCircularReveal = ViewAnimationUtils.createCircularReveal(
  7.         targetView, centerX, centerY, 0, finalRadius);
  8.     mCircularReveal.addListener(new AnimatorListenerAdapter() {
  9.       @Override
  10.       public void onAnimationEnd(Animator animation) {
  11.         mCircularReveal.removeListener(this);
  12.       }
  13.     });
  14.   }
  15. }

代码示例来源：origin: nickbutcher/plaid

  1. /**
  2.  * Calculate the duration for the transition depending upon how far the text has to move.
  3.  */
  4. private long calculateDuration(@NonNull Rect startPosition, @NonNull Rect endPosition) {
  5.   float distance = (float) Math.hypot(
  6.       startPosition.exactCenterX() - endPosition.exactCenterX(),
  7.       startPosition.exactCenterY() - endPosition.exactCenterY());
  8.   long duration = (long) (1000 * (distance / velocity));
  9.   return Math.max(minDuration, Math.min(maxDuration, duration));
  10. }

代码示例来源：origin: bluelinelabs/Conductor

  1. @Override @NonNull
  2. protected Animator getAnimator(@NonNull ViewGroup container, View from, View to, boolean isPush, boolean toAddedToContainer) {
  3.   final float radius = (float) Math.hypot(cx, cy);
  4.   Animator animator = null;
  5.   if (isPush && to != null) {
  6.     animator = ViewAnimationUtils.createCircularReveal(to, cx, cy, 0, radius);
  7.   } else if (!isPush && from != null) {
  8.     animator = ViewAnimationUtils.createCircularReveal(from, cx, cy, radius, 0);
  9.   }
  10.   return animator;
  11. }

代码示例来源：origin: seven332/EhViewer

  1. private boolean createCircularReveal() {
  2.   if (mColorBg == null) {
  3.     return false;
  4.   }
  5.   int w = mColorBg.getWidth();
  6.   int h = mColorBg.getHeight();
  7.   if (ViewCompat.isAttachedToWindow(mColorBg) && w != 0 && h != 0) {
  8.     ViewAnimationUtils.createCircularReveal(mColorBg, w / 2, h / 2, 0,
  9.         (float) Math.hypot(w / 2, h / 2)).setDuration(300).start();
  10.     return true;
  11.   } else {
  12.     return false;
  13.   }
  14. }

代码示例来源：origin: airbnb/lottie-android

  1. private RadialGradient getRadialGradient() {
  2.  int gradientHash = getGradientHash();
  3.  RadialGradient gradient = radialGradientCache.get(gradientHash);
  4.  if (gradient != null) {
  5.   return gradient;
  6.  }
  7.  PointF startPoint = startPointAnimation.getValue();
  8.  PointF endPoint = endPointAnimation.getValue();
  9.  GradientColor gradientColor = colorAnimation.getValue();
  10.  int[] colors = gradientColor.getColors();
  11.  float[] positions = gradientColor.getPositions();
  12.  int x0 = (int) (boundsRect.left + boundsRect.width() / 2 + startPoint.x);
  13.  int y0 = (int) (boundsRect.top + boundsRect.height() / 2 + startPoint.y);
  14.  int x1 = (int) (boundsRect.left + boundsRect.width() / 2 + endPoint.x);
  15.  int y1 = (int) (boundsRect.top + boundsRect.height() / 2 + endPoint.y);
  16.  float r = (float) Math.hypot(x1 - x0, y1 - y0);
  17.  gradient = new RadialGradient(x0, y0, r, colors, positions, Shader.TileMode.CLAMP);
  18.  radialGradientCache.put(gradientHash, gradient);
  19.  return gradient;
  20. }

代码示例来源：origin: runelite/runelite

  1. /**
  2.  * Gets the distance between this point and another.
  3.  *
  4.  * @param other other point
  5.  * @return the distance
  6.  */
  7. public int distanceTo(LocalPoint other)
  8. {
  9.   return (int) Math.hypot(getX() - other.getX(), getY() - other.getY());
  10. }

代码示例来源：origin: runelite/runelite

  1. /**
  2.  * Gets the distance between this point and another.
  3.  *
  4.  * @param other other point
  5.  * @return the distance
  6.  */
  7. public int distanceTo(Point other)
  8. {
  9.   return (int) Math.hypot(getX() - other.getX(), getY() - other.getY());
  10. }

代码示例来源：origin: airbnb/lottie-android

  1. private RadialGradient getRadialGradient() {
  2.  int gradientHash = getGradientHash();
  3.  RadialGradient gradient = radialGradientCache.get(gradientHash);
  4.  if (gradient != null) {
  5.   return gradient;
  6.  }
  7.  PointF startPoint = startPointAnimation.getValue();
  8.  PointF endPoint = endPointAnimation.getValue();
  9.  GradientColor gradientColor = colorAnimation.getValue();
  10.  int[] colors = gradientColor.getColors();
  11.  float[] positions = gradientColor.getPositions();
  12.  float x0 = startPoint.x;
  13.  float y0 = startPoint.y;
  14.  float x1 = endPoint.x;
  15.  float y1 = endPoint.y;
  16.  float r = (float) Math.hypot(x1 - x0, y1 - y0);
  17.  if (r <= 0) {
  18.   r = 0.001f;
  19.  }
  20.  gradient = new RadialGradient(x0, y0, r, colors, positions, Shader.TileMode.CLAMP);
  21.  radialGradientCache.put(gradientHash, gradient);
  22.  return gradient;
  23. }

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