/// <summary>
/// Adds the specified vector to this vector.
/// </summary>
/// <remarks>
/// This vector is <b>not modified</b>.
/// </remarks>
///
/// <param name="v">the vector to add</param>
/// <returns>this vector</returns>
///
public static IModifiableVector3d add(this IModifiableVector3d vector, IVector3d v)
{
vector.setX(vector.x() + v.x());
vector.setY(vector.y() + v.y());
vector.setZ(vector.z() + v.z());
return(vector);
}
/// <summary>
/// Stores the cross product of this vector and the specified vector in this
/// vector.
/// </summary>
/// <remarks>
/// This vector is <b>modified</b>.
/// </remarks>
///
/// <param name="a">the vector</param>
/// <returns>this vector</returns>
///
public static IModifiableVector3d cross(this IModifiableVector3d vector, IVector3d a)
{
vector.setX(vector.y() * a.z() - vector.z() * a.y());
vector.setY(vector.z() * a.x() - vector.x() * a.z());
vector.setZ(vector.x() * a.y() - vector.y() * a.x());
return(vector);
}
/// <summary>
/// Devides this vector with the specified value.
/// </summary>
/// <remarks>
/// This vector is <b>modified</b>.
/// </remarks>
///
/// <param name="a">the value</param>
/// <returns>this vector</returns>
///
public static IModifiableVector3d divide(this IModifiableVector3d vector, double a)
{
vector.setX(vector.x() / a);
vector.setY(vector.y() / a);
vector.setZ(vector.z() / a);
return(vector);
}
/// <summary>
/// Multiplies this vector with the specified value.
/// </summary>
/// <remarks>
/// This vector is <b>modified</b>.
/// </remarks>
///
/// <param name="a">the value</param>
/// <returns>this vector</returns>
///
public static IModifiableVector3d multiply(this IModifiableVector3d vector, double a)
{
vector.setX(vector.x() * a);
vector.setY(vector.y() * a);
vector.setZ(vector.z() * a);
return(vector);
}
/// <summary>
/// Subtracts the specified vector from this vector.
/// </summary>
/// <remarks>
/// This vector is <b>modified</b>.
/// </remarks>
///
/// <param name="x">x coordinate of the vector to subtract</param>
/// <param name="y">y coordinate of the vector to subtract</param>
/// <param name="z">z coordinate of the vector to subtract</param>
/// <returns>this vector</returns>
///
public static IModifiableVector3d subtract(this IModifiableVector3d vector, double x, double y, double z)
{
vector.setX(vector.x() - x);
vector.setY(vector.y() - y);
vector.setZ(vector.z() - z);
return(vector);
}
/// <summary>
/// Applies this transform to the specified vector.
/// </summary>
///
/// <param name="vec">vector to transform</param>
/// <returns>the specified vector</returns>
///
public IModifiableVector3d transform(IModifiableVector3d vec)
{
double x, y;
x = m.m00 * vec.x() + m.m01 * vec.y() + m.m02 * vec.z() + m.m03;
y = m.m10 * vec.x() + m.m11 * vec.y() + m.m12 * vec.z() + m.m13;
vec.setZ(m.m20 * vec.x() + m.m21 * vec.y() + m.m22 * vec.z() + m.m23);
vec.setX(x);
vec.setY(y);
return(vec);
}
/// <summary>
/// Applies this transform to the specified vector.
/// </summary>
///
/// <param name="vec">vector to transform</param>
/// <returns>the specified vector</returns>
///
public IVector3d transform(IVector3d vec)
{
IModifiableVector3d result = vec.asModifiable();
double x, y;
x = m.m00 * vec.x() + m.m01 * vec.y() + m.m02 * vec.z() + m.m03;
y = m.m10 * vec.x() + m.m11 * vec.y() + m.m12 * vec.z() + m.m13;
result.setZ(m.m20 * vec.x() + m.m21 * vec.y() + m.m22 * vec.z() + m.m23);
result.setX(x);
result.setY(y);
return(result);
}
/// <summary>
/// Applies this transform to the specified vector.
/// </summary>
///
/// <param name="vec">vector to transform</param>
/// <param name="amount">transform amount (0 = 0 %, 1 = 100%)</param>
/// <returns>the specified vector</returns>
///
public IModifiableVector3d transform(IModifiableVector3d vec, double amount)
{
double prevX = vec.x();
double prevY = vec.y();
double prevZ = vec.z();
double x, y;
x = m.m00 * vec.x() + m.m01 * vec.y() + m.m02 * vec.z() + m.m03;
y = m.m10 * vec.x() + m.m11 * vec.y() + m.m12 * vec.z() + m.m13;
vec.setZ(m.m20 * vec.x() + m.m21 * vec.y() + m.m22 * vec.z() + m.m23);
vec.setX(x);
vec.setY(y);
double diffX = vec.x() - prevX;
double diffY = vec.y() - prevY;
double diffZ = vec.z() - prevZ;
vec.setX(prevX + (diffX) * amount);
vec.setY(prevY + (diffY) * amount);
vec.setZ(prevZ + (diffZ) * amount);
return(vec);
}