public bool Equals(VectorD other)
{
if (object.ReferenceEquals(this, other))
{
return(true);
}
if (object.ReferenceEquals(null, other))
{
return(false);
}
var otherComponents = other._components;
if (_components.Length != otherComponents.Length)
{
return(false);
}
#if HAS_CODECONTRACTS
Assume(_components.Length == otherComponents.Length);
#endif
for (int dimension = 0; dimension < _components.Length; dimension++)
{
if (!_components[dimension].Equals(otherComponents[dimension]))
{
return(false);
}
}
return(true);
}
public double GetDistanceSquared(VectorD other)
{
if (other == null)
{
throw new ArgumentNullException(nameof(other));
}
var otherComponenets = other._components;
if (otherComponenets.Length != _components.Length)
{
throw new ArgumentOutOfRangeException(nameof(other));
}
if (_components.Length == 0)
{
return(0.0);
}
var sum = MathEx.Square(_components[0] - otherComponenets[0]);
for (var i = 1; i < _components.Length; i++)
{
sum += MathEx.Square(_components[i] - otherComponenets[i]);
}
return(sum);
}
public double GetDot(VectorD right)
{
if (right == null)
{
throw new ArgumentNullException(nameof(right));
}
var rightComponents = right._components;
if (_components.Length != rightComponents.Length)
{
throw new ArgumentOutOfRangeException(nameof(right));
}
if (_components.Length == 0)
{
return(0.0);
}
var sum = _components[0] * rightComponents[0];
for (int i = 1; i < _components.Length; i++)
{
sum += _components[i] * rightComponents[i];
}
return(sum);
}
public VectorD(VectorD source)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
_components = Clone(source._components);
}
public VectorD GetScaled(double scalar)
{
var scaled = new VectorD(_components.Length);
var scaledComponents = scaled._components;
for (int i = 0; i < scaledComponents.Length; i++)
{
scaledComponents[i] = _components[i] * scalar;
}
return(scaled);
}
public VectorD GetProjected(VectorD other)
{
if (other.Dimensions != Dimensions)
{
throw new ArgumentOutOfRangeException(nameof(other));
}
var scalarDenominator = GetMagnitudeSquared();
return(scalarDenominator == 0.0
? other
: GetScaled(GetDot(other) / scalarDenominator));
}
public VectorD GetNegative()
{
var negated = new VectorD(_components.Length);
var negatedComponents = negated._components;
for (var i = 0; i < _components.Length; i++)
{
negatedComponents[i] = -_components[i];
}
return(negated);
}
public VectorD GetQuotient(double divisor)
{
var quotient = new VectorD(_components.Length);
var quotientComponents = quotient._components;
for (int i = 0; i < _components.Length; i++)
{
quotientComponents[i] = _components[i] / divisor;
}
return(quotient);
}
public double GetAngleBetween(VectorD other)
{
if (other == null)
{
throw new ArgumentNullException(nameof(other));
}
if (other._components.Length != _components.Length)
{
throw new ArgumentOutOfRangeException(nameof(other));
}
return(Math.Acos(
GetDot(other)
/ Math.Sqrt(GetMagnitudeSquared() * other.GetMagnitudeSquared())));
}
public static VectorD CreateUnit(int size, int dimension)
{
if (size <= 0)
{
throw new ArgumentOutOfRangeException(nameof(size));
}
if (dimension >= size)
{
throw new ArgumentOutOfRangeException(nameof(dimension));
}
var result = new VectorD(size);
result.Set(dimension, 1.0);
return(result);
}
public void Subtract(VectorD right)
{
if (right == null)
{
throw new ArgumentNullException(nameof(right));
}
if (_components.Length != right._components.Length)
{
throw new ArgumentOutOfRangeException(nameof(right));
}
var rightComponents = right._components;
for (int i = 0; i < _components.Length; i++)
{
_components[i] -= rightComponents[i];
}
}
public VectorD GetDiffernce(VectorD right)
{
if (right == null)
{
throw new ArgumentNullException(nameof(right));
}
if (_components.Length != right._components.Length)
{
throw new ArgumentOutOfRangeException(nameof(right));
}
var difference = new VectorD(_components.Length);
var diffComponents = difference._components;
var rightComponents = right._components;
for (int i = 0; i < _components.Length; i++)
{
diffComponents[i] = _components[i] - rightComponents[i];
}
return(difference);
}
public VectorD GetSum(VectorD right)
{
if (right == null)
{
throw new ArgumentNullException(nameof(right));
}
if (_components.Length != right._components.Length)
{
throw new ArgumentOutOfRangeException(nameof(right));
}
var sum = new VectorD(_components.Length);
var sumComponents = sum._components;
var rightComponents = right._components;
for (int i = 0; i < _components.Length; i++)
{
sumComponents[i] = _components[i] + rightComponents[i];
}
return(sum);
}
public double GetDistance(VectorD other)
{
return(Math.Sqrt(GetDistanceSquared(other)));
}
