/// <summary>
/// Constructs a subdivision mesh by vertex shading, given an input
/// array of vertex points and an input array of faces defined by a set
/// of numbers, which are the indices of the vertices in the 'vertices'
/// array making up the face.
/// </summary>
/// <param name="vertices">Input array of vertex points</param>
/// <param name="faceIndices">Input array of faces indices for each
/// vertex </param>
/// <param name="vertexNormals">Input array of vertex normals</param>
/// <param name="vertexColors">Input array of color assigned to each
/// vertex </param>
/// <param name="subDivisionLevel">Initial smoothness level, subDivisionLevel must
/// have a value greater than or equal to 0 and less than 5.</param>
/// <returns>SubDivisionMesh</returns>
public static DSSubDivisionMesh ByVerticesFaceIndices(DSPoint[] vertices,
int[][] faceIndices, DSVector[] vertexNormals, DSColor[] vertexColors, int subDivisionLevel)
{
string kMethodName = "DSSubDivisionMesh.ByVerticesFaceIndices";
if (subDivisionLevel < 0 || subDivisionLevel >= 5)
throw new System.ArgumentException(string.Format(Properties.Resources.InvalidInput, "subDivisionLevel", kMethodName));
IPointEntity[] points = vertices.ConvertAll(DSGeometryExtension.ToEntity<DSPoint, IPointEntity>);
if (points.Length < 3 || points.ArePointsColinear())
throw new System.ArgumentException(string.Format(Properties.Resources.InvalidInput, "vertices", kMethodName));
ISubDMeshEntity entity = HostFactory.Factory.SubDMeshByVerticesFaceIndices(points, faceIndices, subDivisionLevel);
if (null == entity)
throw new System.InvalidOperationException(string.Format(Properties.Resources.OperationFailed, kMethodName));
DSSubDivisionMesh mesh = new DSSubDivisionMesh(entity, true);
try
{
if (null != vertexNormals && vertexNormals.Length > 0)
{
if (vertexNormals.Length != entity.GetNumVertices())
throw new System.ArgumentException(string.Format(Properties.Resources.NotEqual, "size of vertexNormals", "number of vertices"), "vertexNormals");
if (!entity.UpdateSubDMeshNormals(vertexNormals.ConvertAll((DSVector v)=>v.IVector)))
throw new System.InvalidOperationException(string.Format(Properties.Resources.OperationFailed, kMethodName));
}
if (null != vertexColors && vertexColors.Length > 0)
{
if (subDivisionLevel > 0)
throw new System.InvalidOperationException(Properties.Resources.VertexColorNotSupported);
if (vertexColors.Length != entity.GetNumVertices())
throw new System.ArgumentException(string.Format(Properties.Resources.NotEqual, "size of vertexColors", "number of vertices"), "vertexColors");
if (!entity.UpdateSubDMeshColors(vertexColors.ConvertAll((DSColor c)=>c.IColor)))
throw new System.InvalidOperationException(string.Format(Properties.Resources.OperationFailed, kMethodName));
}
}
catch (System.Exception ex)
{
mesh.Dispose();
throw ex;
}
mesh.SubDivisionLevel = subDivisionLevel;
return mesh;
}
