public void SliceMesh(SimpleCfdMesh mesh, int vertexAmountThreshold = 65000)
{
Dictionary <int, Submesh> newSubmeshes = new Dictionary <int, Submesh>();
int subKey = 0;
foreach (var kv in mesh.Submeshes)
{
if (kv.Value.Vertices.Count <= vertexAmountThreshold)
{
newSubmeshes.Add(subKey++, kv.Value);
continue;
}
var submesh = kv.Value;
var slice = (int)Math.Ceiling(submesh.Vertices.Count / (float)vertexAmountThreshold);
var bestVertexCountThreshold = (int)(submesh.Vertices.Count / (float)slice);
int sliceKey = 0;
Dictionary <int, int> old2New = new Dictionary <int, int>();
List <int> indices = new List <int>();
for (int i = 0, ilen = submesh.Indices.Count; i < ilen; i++)
{
var idx = submesh.Indices[i];
if (!old2New.ContainsKey(idx))
{
old2New[idx] = old2New.Count;
}
indices.Add(old2New[idx]);
if (indices.Count % 3 == 0)//trick for triangles
{
if (old2New.Count >= bestVertexCountThreshold)
{
if (sliceKey < slice - 1 || old2New.Count >= vertexAmountThreshold)
{
var newSubmesh = CreateSubmeshSlice(submesh, old2New.Keys.ToList(), indices);
newSubmesh.Name = submesh.Name + "_" + sliceKey;
newSubmesh.TimeStep = submesh.TimeStep;
newSubmeshes[subKey++] = newSubmesh;
old2New.Clear();
indices.Clear();
sliceKey++;
}
}
}
}
if (old2New.Count > 0)
{
var newSubmesh = CreateSubmeshSlice(submesh, old2New.Keys.ToList(), indices);
newSubmesh.Name = submesh.Name + "_" + sliceKey;
newSubmesh.TimeStep = submesh.TimeStep;
newSubmeshes[subKey++] = newSubmesh;
old2New.Clear();
indices.Clear();
}
}
mesh.Submeshes = newSubmeshes;
}
public SimpleCfdMesh VtkToCfdMesh(VtkModel model)
{
var mesh = new SimpleCfdMesh();
mesh.Name = model.Description;
Vector3 min = new Vector3(float.MaxValue, float.MaxValue, float.MaxValue);
Vector3 max = new Vector3(float.MinValue, float.MinValue, float.MinValue);
var vCount = model.DataSet.Points.Count;
var subMesh = new Submesh();
subMesh.Name = mesh.Name;
mesh.Submeshes[0] = subMesh;
subMesh.Vertices.AddRange(model.DataSet.Points);
for (int i = 0; i < vCount; i++)
{
var v = model.DataSet.Points[i];
min = Vector3.Min(min, v);
max = Vector3.Max(max, v);
}
mesh.Max = max;
mesh.Min = min;
subMesh.Max = max;
subMesh.Min = min;
#region Point Data
if (model.PointDatas != null && model.PointDatas.Count > 0)
{
foreach (var kv in model.PointDatas)
{
var key = kv.Key;
var val = kv.Value;
if (val is Scalars)
{
var cs = val as Scalars;
List <float[]> realScalar = new List <float[]>(cs.Values.Count);
for (int i = 0, len = cs.Values.Count; i < len; i++)
{
realScalar.Add(cs.Values[i]);
}
if (!subMesh.ScalarAttribs.ContainsKey(key))
{
subMesh.ScalarAttribs[key] = new List <List <float[]> >();
}
subMesh.ScalarAttribs[key].Add(realScalar);
}
else if (val is VectorsOrNormals)
{
var vn = val as VectorsOrNormals;
List <float[]> realVector = new List <float[]>(vn.Values.Count);
for (int i = 0, len = vn.Values.Count; i < len; i++)
{
var item = vn.Values[i];
realVector.Add(new float[] { item.X, item.Y, item.Z });
}
if (!subMesh.VectorAttribs.ContainsKey(key))
{
subMesh.VectorAttribs[key] = new List <List <float[]> >();
}
subMesh.VectorAttribs[key].Add(realVector);
}
else if (val is TextureCoordinates)
{
//TODO
}
else if (val is FieldData)
{
var fieldData = val as FieldData;
if (fieldData.Arrays != null && fieldData.Arrays.Count > 0)
{
foreach (var pair in fieldData.Arrays)
{
var pk = pair.Key;
var pv = pair.Value;
//taken field data array as scalars
if (pv.Tuples != null && pv.Tuples.Count > 0)
{
var scalars = new List <float[]>();
for (int i = 0, len = pv.Tuples.Count; i < len; i++)
{
scalars.Add(pv.Tuples[i]);
}
var k = key + "_" + pk;
if (!subMesh.ScalarAttribs.ContainsKey(k))
{
subMesh.ScalarAttribs[k] = new List <List <float[]> >();
}
subMesh.ScalarAttribs[k].Add(scalars);
}
}
}
}
else
{
throw new NotImplementedException("not implemented now for " + val.GetType());
}
}
}
#endregion
#region PolyData
if (model.DataSet is VtkPolyData)
{
var items = (model.DataSet as VtkPolyData).Items;
var cellAttrib2Point = new Dictionary <int, int>();//key-vertex idx, val-cell idx
foreach (var kv in items)
{
switch (kv.Key)
{
case "Polygons":
case "POLYGONS":
subMesh.IndexType = 1;
var polygons = kv.Value;
for (int k = 0, kc = polygons.Indices.Count; k < kc; k++)
{
var idxs = polygons.Indices[k];
cellAttrib2Point[idxs[0]] = k;
cellAttrib2Point[idxs[1]] = k;
for (int i = 1, idLen = idxs.Length - 1; i < idLen; i++)
{
subMesh.Indices.Add(idxs[0]);
subMesh.Indices.Add(idxs[i]);
subMesh.Indices.Add(idxs[i + 1]);
cellAttrib2Point[idxs[i + 1]] = k;
}
}
break;
case "TriangleStrips":
case "TRIANGLE_STRIPS":
subMesh.IndexType = 1;
var triStrips = kv.Value;
for (int k = 0, kc = triStrips.Indices.Count; k < kc; k++)
{
var idxs = triStrips.Indices[k];
if (idxs.Length < 3)
{
continue;
}
cellAttrib2Point[idxs[0]] = k;
cellAttrib2Point[idxs[1]] = k;
for (int i = 1, j = 0, end = idxs.Length - 1; i < end; i++, j++)
{
if (j % 2 == 0)
{
subMesh.Indices.Add(idxs[i - 1]);
subMesh.Indices.Add(idxs[i]);
subMesh.Indices.Add(idxs[i + 1]);
}
else
{
subMesh.Indices.Add(idxs[i - 1]);
subMesh.Indices.Add(idxs[i + 1]);
subMesh.Indices.Add(idxs[i]);
}
cellAttrib2Point[idxs[i + 1]] = k;
}
}
break;
default:
throw new NotImplementedException("implement process for VERTICES, LINES, NORMALS, later...");
break;
}
}
//deal with cell data
#region Cell Data
if (model.CellDatas != null && model.CellDatas.Count > 0)
{
var vtxCount = subMesh.Vertices.Count;
foreach (var kv in model.CellDatas)
{
var key = kv.Key;
var val = kv.Value;
if (val is Scalars)
{
var cs = val as Scalars;
List <float[]> realScalar = new List <float[]>(vtxCount);
for (int i = 0; i < vtxCount; i++)
{
realScalar.Add(cs.Values[cellAttrib2Point[i]]);
}
if (!subMesh.ScalarAttribs.ContainsKey(key))
{
subMesh.ScalarAttribs[key] = new List <List <float[]> >();
}
subMesh.ScalarAttribs[key].Add(realScalar);
}
else if (val is VectorsOrNormals)
{
var vn = val as VectorsOrNormals;
List <float[]> realVector = new List <float[]>(vtxCount);
for (int i = 0; i < vtxCount; i++)
{
var item = vn.Values[cellAttrib2Point[i]];
realVector.Add(new float[] { item.X, item.Y, item.Z });
}
if (!subMesh.VectorAttribs.ContainsKey(key))
{
subMesh.VectorAttribs[key] = new List <List <float[]> >();
}
subMesh.VectorAttribs[key].Add(realVector);
}
else if (val is FieldData)
{
var fieldData = val as FieldData;
if (fieldData.Arrays != null && fieldData.Arrays.Count > 0)
{
foreach (var pair in fieldData.Arrays)
{
var pk = pair.Key;
var pv = pair.Value;
//taken field data array as scalars
if (pv.Tuples != null && pv.Tuples.Count > 0)
{
var scalars = new List <float[]>(vtxCount);
for (int i = 0; i < vtxCount; i++)
{
scalars.Add(pv.Tuples[cellAttrib2Point[i]]);
}
var k = key + "_" + pk;
if (!subMesh.ScalarAttribs.ContainsKey(k))
{
subMesh.ScalarAttribs[k] = new List <List <float[]> >();
}
subMesh.ScalarAttribs[k].Add(scalars);
}
}
}
}
else
{
throw new NotImplementedException("not implemented now for " + val.GetType());
}
}
}
#endregion
}
#endregion
#region Cells
if (model.DataSet.Cells != null && model.DataSet.Cells.Count > 0)
{
subMesh.IndexType = 1;
var cellAttrib2Point = new Dictionary <int, int>();//key-vertex idx, val-cell idx
for (int i = 0, cl = model.DataSet.Cells.Count; i < cl; i++)
{
var cell = model.DataSet.Cells[i];
foreach (var index in cell.Indices)
{
cellAttrib2Point[index] = i;
}
if (cell.Type == VtkCellType.Hexahedron)
{
subMesh.Indices.Add(cell.Indices[0]);
subMesh.Indices.Add(cell.Indices[1]);
subMesh.Indices.Add(cell.Indices[2]);
subMesh.Indices.Add(cell.Indices[2]);
subMesh.Indices.Add(cell.Indices[3]);
subMesh.Indices.Add(cell.Indices[0]);
subMesh.Indices.Add(cell.Indices[0 + 4]);
subMesh.Indices.Add(cell.Indices[1 + 4]);
subMesh.Indices.Add(cell.Indices[2 + 4]);
subMesh.Indices.Add(cell.Indices[2 + 4]);
subMesh.Indices.Add(cell.Indices[3 + 4]);
subMesh.Indices.Add(cell.Indices[0 + 4]);
subMesh.Indices.Add(cell.Indices[0]);
subMesh.Indices.Add(cell.Indices[1]);
subMesh.Indices.Add(cell.Indices[5]);
subMesh.Indices.Add(cell.Indices[5]);
subMesh.Indices.Add(cell.Indices[4]);
subMesh.Indices.Add(cell.Indices[0]);
subMesh.Indices.Add(cell.Indices[1]);
subMesh.Indices.Add(cell.Indices[2]);
subMesh.Indices.Add(cell.Indices[6]);
subMesh.Indices.Add(cell.Indices[6]);
subMesh.Indices.Add(cell.Indices[5]);
subMesh.Indices.Add(cell.Indices[1]);
subMesh.Indices.Add(cell.Indices[2]);
subMesh.Indices.Add(cell.Indices[3]);
subMesh.Indices.Add(cell.Indices[7]);
subMesh.Indices.Add(cell.Indices[7]);
subMesh.Indices.Add(cell.Indices[6]);
subMesh.Indices.Add(cell.Indices[2]);
subMesh.Indices.Add(cell.Indices[3]);
subMesh.Indices.Add(cell.Indices[0]);
subMesh.Indices.Add(cell.Indices[4]);
subMesh.Indices.Add(cell.Indices[4]);
subMesh.Indices.Add(cell.Indices[7]);
subMesh.Indices.Add(cell.Indices[3]);
}
else if (cell.Type == VtkCellType.Voxel)
{
subMesh.Indices.Add(cell.Indices[0]);
subMesh.Indices.Add(cell.Indices[1]);
subMesh.Indices.Add(cell.Indices[3]);
subMesh.Indices.Add(cell.Indices[3]);
subMesh.Indices.Add(cell.Indices[2]);
subMesh.Indices.Add(cell.Indices[0]);
subMesh.Indices.Add(cell.Indices[0 + 4]);
subMesh.Indices.Add(cell.Indices[1 + 4]);
subMesh.Indices.Add(cell.Indices[3 + 4]);
subMesh.Indices.Add(cell.Indices[3 + 4]);
subMesh.Indices.Add(cell.Indices[2 + 4]);
subMesh.Indices.Add(cell.Indices[0 + 4]);
subMesh.Indices.Add(cell.Indices[0]);
subMesh.Indices.Add(cell.Indices[1]);
subMesh.Indices.Add(cell.Indices[5]);
subMesh.Indices.Add(cell.Indices[5]);
subMesh.Indices.Add(cell.Indices[4]);
subMesh.Indices.Add(cell.Indices[0]);
subMesh.Indices.Add(cell.Indices[1]);
subMesh.Indices.Add(cell.Indices[3]);
subMesh.Indices.Add(cell.Indices[7]);
subMesh.Indices.Add(cell.Indices[7]);
subMesh.Indices.Add(cell.Indices[5]);
subMesh.Indices.Add(cell.Indices[1]);
subMesh.Indices.Add(cell.Indices[3]);
subMesh.Indices.Add(cell.Indices[2]);
subMesh.Indices.Add(cell.Indices[6]);
subMesh.Indices.Add(cell.Indices[6]);
subMesh.Indices.Add(cell.Indices[7]);
subMesh.Indices.Add(cell.Indices[3]);
subMesh.Indices.Add(cell.Indices[2]);
subMesh.Indices.Add(cell.Indices[0]);
subMesh.Indices.Add(cell.Indices[4]);
subMesh.Indices.Add(cell.Indices[4]);
subMesh.Indices.Add(cell.Indices[6]);
subMesh.Indices.Add(cell.Indices[2]);
}
else
{
throw new NotImplementedException("implement process for " + cell.Type);
}
}
//deal with cell data
#region Cell Data
if (model.CellDatas != null && model.CellDatas.Count > 0)
{
var vtxCount = subMesh.Vertices.Count;
foreach (var kv in model.CellDatas)
{
var key = kv.Key;
var val = kv.Value;
if (val is Scalars)
{
var cs = val as Scalars;
List <float[]> realScalar = new List <float[]>(vtxCount);
for (int i = 0; i < vtxCount; i++)
{
realScalar.Add(cs.Values[cellAttrib2Point[i]]);
}
if (!subMesh.ScalarAttribs.ContainsKey(key))
{
subMesh.ScalarAttribs[key] = new List <List <float[]> >();
}
subMesh.ScalarAttribs[key].Add(realScalar);
}
else if (val is VectorsOrNormals)
{
var vn = val as VectorsOrNormals;
List <float[]> realVector = new List <float[]>(vtxCount);
for (int i = 0; i < vtxCount; i++)
{
var item = vn.Values[cellAttrib2Point[i]];
realVector.Add(new float[] { item.X, item.Y, item.Z });
}
if (!subMesh.VectorAttribs.ContainsKey(key))
{
subMesh.VectorAttribs[key] = new List <List <float[]> >();
}
subMesh.VectorAttribs[key].Add(realVector);
}
else if (val is FieldData)
{
var fieldData = val as FieldData;
if (fieldData.Arrays != null && fieldData.Arrays.Count > 0)
{
foreach (var pair in fieldData.Arrays)
{
var pk = pair.Key;
var pv = pair.Value;
//taken field data array as scalars
if (pv.Tuples != null && pv.Tuples.Count > 0)
{
var scalars = new List <float[]>(vtxCount);
for (int i = 0; i < vtxCount; i++)
{
scalars.Add(pv.Tuples[cellAttrib2Point[i]]);
}
var k = key + "_" + pk;
if (!subMesh.ScalarAttribs.ContainsKey(k))
{
subMesh.ScalarAttribs[k] = new List <List <float[]> >();
}
subMesh.ScalarAttribs[k].Add(scalars);
}
}
}
}
else
{
throw new NotImplementedException("not implemented now for " + val.GetType());
}
}
}
#endregion
}
#endregion
return(mesh);
}
