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/// <summary>A simple XYZ representation of a normal (<see cref="Vertex"/>).</summary>
publicclassNormal:Vertex
{
/// <summary>Creates a new, empty <see cref="Normal"/>.</summary>
publicNormal():base(){}
/// <summary>Creates a new <see cref="Normal"/> using the provided coordinates.</summary>
publicNormal(floatx,floaty,floatz):base(x,y,z){}
/// <summary>Flips the normal so it faces the opposite direction.</summary>
publicvoidInvert()
{
X*=-1;
Y*=-1;
Z*=-1;
}
/// <summary>Reads a single <see cref="Normal"/> from the <paramref name="reader"/>.</summary>
/// <param name="reader">The reader which contains a <see cref="Normal"/> to be read at the current position</param>
publicstaticnewNormalRead(StreamReaderreader)
{
returnNormal.FromVertex(Vertex.Read(reader));
}
/// <summary>Reads a single <see cref="Normal"/> from the <paramref name="reader"/>.</summary>
/// <param name="reader">The reader which contains a <see cref="Normal"/> to be read at the current position</param>
publicstaticnewNormalRead(BinaryReaderreader)
{
returnNormal.FromVertex(Vertex.Read(reader));
}
/// <summary>Converts the <paramref name="vertex"/> to a normal.</summary>
/// <remarks>This does nothing more than copy the X, Y and Z coordinates of the <paramref name="vertex"/> into a new <see cref="Normal"/> instance.</remarks>
/// <param name="vertex">The <see cref="Vertex"/> to be converted into a <see cref="Normal"/>.</param>
/// <returns>A <see cref="Normal"/> or null if the <paramref name="vertex"/> is null.</returns>
