384 lines
14 KiB
C#
384 lines
14 KiB
C#
using System;
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using System.Runtime.Serialization;
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using System.Diagnostics.CodeAnalysis;
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using System.Collections.Generic;
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namespace Raytheon.Units
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{
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/// <summary>
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/// This class represents a velocity.
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///
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/// It has no constructors. Instead, it provides multiple methods for creating objects of this
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/// type. Those methods are of the form FromXXX, where XXX is a unit (e.g. FromRadiansPerSecSqrd).
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///
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/// Properties (e.g. RadiansPerSecSqrd) are provided to convert the value to other units and
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/// return as type double.
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///
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/// Methods (operator overloads) are provided to perform calculations with related types (e.g.
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/// Angle, AngularVelocity).
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/// </summary>
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[Serializable]
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[DataContract]
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public class AngularAcceleration
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{
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public enum Unit
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{
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DegreesPerSecSqrd,
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RadiansPerSecSqrd,
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MilliradiansPerSecSqrd
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}
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public static IDictionary<Unit, List<string>> UnitAbbreviations = new Dictionary<Unit, List<string>>()
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{
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{Unit.DegreesPerSecSqrd, new List<string>(){ "deg/sec^2" } },
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{Unit.MilliradiansPerSecSqrd, new List<string>(){ "mrad/sec^2" } },
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{Unit.RadiansPerSecSqrd, new List<string>(){ "rad/sec^2" } }
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};
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private const Unit DefaultUnits = Unit.RadiansPerSecSqrd;
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private const double DegreesPerRadian = 180 / Math.PI;
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[DataMember(Name = "AngularAcceleration", IsRequired = true)]
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private double _acceleration; // radians/seconds^2
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// map: unit => abbreviation, conversion method and property
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private static IDictionary<Unit, UnitInfo<AngularAcceleration>> _unitInfo = new Dictionary<Unit, UnitInfo<AngularAcceleration>>()
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{
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{ Unit.DegreesPerSecSqrd, new UnitInfo<AngularAcceleration>(UnitAbbreviations[Unit.DegreesPerSecSqrd], FromDegreesPerSecSqrd, typeof(AngularAcceleration).GetProperty("DegreesPerSecSqrd").GetGetMethod()) },
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{ Unit.MilliradiansPerSecSqrd, new UnitInfo<AngularAcceleration>(UnitAbbreviations[Unit.MilliradiansPerSecSqrd], FromMilliradiansPerSecSqrd, typeof(AngularAcceleration).GetProperty("MilliradiansPerSecSqrd").GetGetMethod()) },
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{ Unit.RadiansPerSecSqrd, new UnitInfo<AngularAcceleration>(UnitAbbreviations[Unit.RadiansPerSecSqrd], FromRadiansPerSecSqrd, typeof(AngularAcceleration).GetProperty("RadiansPerSecSqrd").GetGetMethod()) }
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};
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/// <summary>
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/// Prevents a default instance of the <see cref="AngularAcceleration"/> class from being created.
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/// Use FromXXX methods to create objects of this type.
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/// </summary>
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/// <exception cref="System.Exception">No one should be calling this, it is only here to prevent users from creating default object</exception>
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private AngularAcceleration()
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{
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throw new InvalidOperationException("No one should be calling this, it is only here to prevent users from creating default object");
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}
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/// <summary>
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/// ctor used by this class to create objects in FromXXX methods
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/// </summary>
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/// <param name="acceleration">The acceleration - radians/sec^2.</param>
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private AngularAcceleration(double acceleration)
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{
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_acceleration = acceleration;
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}
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#region conversion properties
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/// <summary>
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/// Returns degrees/sec^2 as type double
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/// </summary>
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/// <value>
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/// degrees/sec^2
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/// </value>
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public double DegreesPerSecSqrd
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{
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get { return _acceleration * DegreesPerRadian; }
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}
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/// <summary>
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/// Returns milliradians/sec^2 as type double
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/// </summary>
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/// <value>
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/// milliradians/sec^2
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/// </value>
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public double MilliradiansPerSecSqrd
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{
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get { return _acceleration * 1000; }
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}
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/// <summary>
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/// Returns radians/sec^2 as type double
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/// </summary>
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/// <value>
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/// radians/sec^2
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/// </value>
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public double RadiansPerSecSqrd
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{
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get { return _acceleration; }
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}
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#endregion
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#region creation methods
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/// <summary>
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/// Returns AngularAcceleration object interpreting passed value as degrees/sec
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/// </summary>
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/// <param name="degreesPerSecSqrd">degrees/sec</param>
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/// <returns></returns>
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public static AngularAcceleration FromDegreesPerSecSqrd(double degreesPerSecSqrd)
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{
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return new AngularAcceleration(degreesPerSecSqrd / DegreesPerRadian);
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}
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/// <summary>
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/// Returns AngularAcceleration object interpreting passed value as radians/sec^2
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/// </summary>
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/// <param name="milliradiansPerSecSqrd">radians/sec^2</param>
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/// <returns></returns>
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public static AngularAcceleration FromMilliradiansPerSecSqrd(double milliradiansPerSecSqrd)
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{
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return new AngularAcceleration(milliradiansPerSecSqrd / 1000);
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}
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/// <summary>
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/// Returns AngularAcceleration object interpreting passed value as radians/sec^2
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/// </summary>
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/// <param name="radiansPerSecSqrd">radians/sec^2</param>
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/// <returns></returns>
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public static AngularAcceleration FromRadiansPerSecSqrd(double radiansPerSecSqrd)
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{
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return new AngularAcceleration(radiansPerSecSqrd);
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}
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#endregion
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public override bool Equals(object obj)
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{
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AngularAcceleration a = obj as AngularAcceleration;
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return (a == null) ? false : (this._acceleration == a._acceleration);
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}
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public override int GetHashCode()
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{
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return _acceleration.GetHashCode();
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}
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#region binary operators
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// not implementing %, &, |, ^, <<, >>
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public static AngularAcceleration operator +(AngularAcceleration left, AngularAcceleration right)
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{
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if (null == left)
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throw new ArgumentNullException("left", "Cannot add a null AngularAcceleration");
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if (null == right)
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throw new ArgumentNullException("right", "Cannot add null AngularAcceleration");
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return new AngularAcceleration(left._acceleration + right._acceleration);
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}
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public static AngularAcceleration operator -(AngularAcceleration left, AngularAcceleration right)
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{
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if (null == left)
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throw new ArgumentNullException("left", "Cannot subtract a null AngularAcceleration");
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if (null == right)
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throw new ArgumentNullException("right", "Cannot subtract null AngularAcceleration");
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return new AngularAcceleration(left._acceleration - right._acceleration);
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}
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public static AngularAcceleration operator *(AngularAcceleration acceleration, double scalar)
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{
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if (null == acceleration)
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throw new ArgumentNullException("acceleration", "Cannot multiply a null AngularAcceleration");
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return new AngularAcceleration(acceleration._acceleration * scalar);
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}
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public static AngularAcceleration operator *(double scalar, AngularAcceleration acceleration)
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{
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if (null == acceleration)
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throw new ArgumentNullException("acceleration", "Cannot multiply a null AngularAcceleration");
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return new AngularAcceleration(scalar * acceleration._acceleration);
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}
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public static AngularAcceleration operator /(AngularAcceleration acceleration, double scalar)
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{
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if (null == acceleration)
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throw new ArgumentNullException("acceleration", "Cannot divide a null AngularAcceleration");
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if (0.0 == scalar)
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throw new DivideByZeroException("Cannot divide Angular Acceleration by 0");
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return new AngularAcceleration(acceleration._acceleration / scalar);
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}
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#endregion
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#region comparison operators
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public static bool operator ==(AngularAcceleration left, AngularAcceleration right)
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{
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bool bReturn = false;
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if (object.ReferenceEquals(left, null))
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{
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if (object.ReferenceEquals(right, null))
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{
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//both are null, so we are ==
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bReturn = true;
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}
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}
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else
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{
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if (!object.ReferenceEquals(left, null) &&
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!object.ReferenceEquals(right, null))
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{
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bReturn = left._acceleration == right._acceleration;
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}
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}
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return bReturn;
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}
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public static bool operator !=(AngularAcceleration left, AngularAcceleration right)
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{
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return !(left == right);
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}
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public static bool operator <(AngularAcceleration left, AngularAcceleration right)
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{
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if (null == left)
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throw new ArgumentNullException("left", "Cannot compare null AngularAcceleration");
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if (null == right)
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throw new ArgumentNullException("right", "Cannot compare null AngularAcceleration");
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return left._acceleration < right._acceleration;
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}
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public static bool operator >(AngularAcceleration left, AngularAcceleration right)
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{
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if (null == left)
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throw new ArgumentNullException("left", "Cannot compare null AngularAcceleration");
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if (null == right)
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throw new ArgumentNullException("right", "Cannot compare null AngularAcceleration");
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return left._acceleration > right._acceleration;
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}
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public static bool operator <=(AngularAcceleration left, AngularAcceleration right)
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{
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if (null == left)
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throw new ArgumentNullException("left", "Cannot compare null AngularAcceleration");
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if (null == right)
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throw new ArgumentNullException("right", "Cannot compare null AngularAcceleration");
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return left._acceleration <= right._acceleration;
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}
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public static bool operator >=(AngularAcceleration left, AngularAcceleration right)
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{
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if (null == left)
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throw new ArgumentNullException("left", "Cannot compare null AngularAcceleration");
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if (null == right)
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throw new ArgumentNullException("right", "Cannot compare null AngularAcceleration");
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return left._acceleration >= right._acceleration;
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}
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#endregion
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#region operators with other classes
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/// <summary>
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/// Implements the operator * for AngularVelocity = AngularAcceleration * PrecisionTimeSpan
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/// </summary>
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/// <param name="acceleration">The velocity.</param>
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/// <param name="time">The time.</param>
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/// <returns>
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/// Angle
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/// </returns>
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public static AngularVelocity operator *(AngularAcceleration acceleration, PrecisionTimeSpan time)
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{
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if (null == acceleration)
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throw new ArgumentNullException("acceleration", "Cannot multiply with null AngularAcceleration");
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if (null == time)
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throw new ArgumentNullException("time", "Cannot multiply with null PrecisionTimeSpan");
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return AngularVelocity.FromRadiansPerSec(acceleration.RadiansPerSecSqrd * time.Seconds);
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}
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/// <summary>
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/// Implements the operator * for AngularVelocity = PrecisionTimeSpan * AngularAcceleration
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/// </summary>
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/// <param name="acceleration">The acceleration.</param>
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/// <param name="time">The time.</param>
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/// <returns>
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/// AngularVelocity
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/// </returns>
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public static AngularVelocity operator *(PrecisionTimeSpan time, AngularAcceleration acceleration)
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{
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if (null == acceleration)
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throw new ArgumentNullException("acceleration", "Cannot multiply with null AngularAcceleration");
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if (null == time)
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throw new ArgumentNullException("time", "Cannot multiply with null PrecisionTimeSpan");
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return AngularVelocity.FromRadiansPerSec(time.Seconds * acceleration.RadiansPerSecSqrd);
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}
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#endregion
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#region parsing
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public static AngularAcceleration Parse(string s)
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{
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return Common.Parse(s, _unitInfo);
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}
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public static bool TryParse(string s, out AngularAcceleration value)
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{
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try
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{
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value = AngularAcceleration.Parse(s);
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return true;
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}
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catch (Exception)
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{
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value = null;
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return false;
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}
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}
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#endregion
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/// <summary>
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/// Returns a string appended with default units (e.g. "1.23 deg/sec^2").
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/// </summary>
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/// <returns>
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/// A string that represents this instance
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/// </returns>
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public override string ToString()
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{
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return ToString(DefaultUnits);
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}
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/// <summary>
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/// overload that returns a string appended with specified units (e.g. "1.23 deg/sec^2").
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/// </summary>
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/// <param name="units"></param>
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/// <returns></returns>
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public string ToString(Unit units)
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{
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double value = (double)_unitInfo[units].PropertyGetter.Invoke(this, null);
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return $"{value} {_unitInfo[units].Abbreviation[0]}";
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}
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}
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}
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