Angle

Introduction

Convert angle value, built-in methods of phaser.

• Author: Richard Davey

Usage

Degree <-> Radians

• Degree to radians

  var rad = Phaser.Math.DegToRad(deg);
  

• Radians to degree

  var deg = Phaser.Math.RadToDeg(rad);  // deg : -180 ~ 180
  

Wrap

• Wrap angle (radians) in the range of -PI to PI

  var rad = Phaser.Math.Angle.Wrap(angle);
  

• Wrap angle (radians) in the range of 0 to 2*PI

  var rad = Phaser.Math.Angle.Normalize(angle);
  

• Wrap angle (degrees) in the range of -180 to 180

  var deg = Phaser.Math.Angle.WrapDegrees(angle);
  

Angle between points

• Angle from (0,0) to vector (x2 - x1 , y2 - y1)

  var rad = Phaser.Math.Angle.Between(x1, y1, x2, y2);
  

  var rad = Phaser.Math.Angle.BetweenPoints(point1, point2);
  

Angle between angles

• Shortest angle (degrees) between 2 angles

  var deg = Phaser.Math.Angle.ShortestBetween(angle1, angle2)
  

  • angle1, angle2 : Angle in degrees in the range of -180 to 180
  • deg : Shortest angle in degrees
    • deg > 0 : Counter-ClockWise rotation
    • deg < 0 : ClockWise rotation

Rotate around position

• Rotate a point around x and y by the given angle.

  var out = Phaser.Math.RotateAround(point, x, y, angle);
  

• Rotate a point around x and y by the given angle and distance.

  var out = Phaser.Math.RotateAroundDistance(point, x, y, angle, distance);
  

Rotate to angle

var rad = Phaser.Math.Angle.RotateTo(currentAngle, targetAngle, lerp)

• currentAngle, : The current angle, in radians.
• targetAngle : The target angle to rotate to, in radians.
• lerp : The lerp value to add to the current angle.

Random angle

• Returns a random angle in the range [-pi, pi].

  var angle = Phaser.Math.Angle.Random();
  

• Returns a random angle in the range [-180, 180].

  var angle = Phaser.Math.Angle.RandomDegrees();