public static Vector3D ComputeNormal(TetFace face)
{
if (face.Tetras.Count != 1)
{
return Vector3D.Zero;
}
Vector3D[] v = new Vector3D[3];
for (int i = 0; i < 3; i++)
{
v[i] = face.Vertices[i].Pos;
}
Vector3D n = (v[1] - v[0]).Cross(v[2] - v[0]).Normalize();
foreach (var vt in face.Tetras[0].Vertices)
{
bool top = true;
foreach (var vf in face.Vertices)
{
if (vt == vf)
{
top = false;
break;
}
}
if (top && n.Dot(vt.Pos - v[0]) > 0)
{
n = -n;
TetVertex temp = face.Vertices[0];
face.Vertices[0] = face.Vertices[2];
face.Vertices[2] = temp;
break;
}
}
return n;
}
public static Tetrahedron CheckBoundary(TetFace face)
{
Tetrahedron t0 = face.Tetras.Count > 0 && face.Tetras[0].Flag > 0 ? face.Tetras[0] : null;
Tetrahedron t1 = face.Tetras.Count > 1 && face.Tetras[1].Flag > 0 ? face.Tetras[1] : null;
if (t0 != null && t1 == null)
{
return t0;
}
else if (t0 == null && t1 != null)
{
return t1;
}
else
{
return null;
}
}
public static Tetrahedron CheckBoundary(TetFace face)
{
Tetrahedron t0 = face.Tetras.Count > 0 && face.Tetras[0].Flag > 0 ? face.Tetras[0] : null;
Tetrahedron t1 = face.Tetras.Count > 1 && face.Tetras[1].Flag > 0 ? face.Tetras[1] : null;
if (t0 != null && t1 == null)
{
return(t0);
}
else if (t0 == null && t1 != null)
{
return(t1);
}
else
{
return(null);
}
}
void ReadFaceFile()
{
string[] all = File.ReadAllLines(faceFile);
int[] arr = ReadIntLine(GetFirstLine(all));
foreach (var line in GetRemainingLine(all))
{
arr = ReadIntLine(line);
TetFace face = new TetFace();
face.Vertices.Add(mesh.Vertices[arr[1]]);
face.Vertices.Add(mesh.Vertices[arr[2]]);
face.Vertices.Add(mesh.Vertices[arr[3]]);
face.Vertices.TrimExcess();
face.Index = mesh.Faces.Count;
face.B = arr[4] == 1;
mesh.Faces.Add(face);
}
}
public static Vector3D ComputeNormal(TetFace face)
{
if (face.OnBoundary)
{
return(TetMeshUtil.ComputeNormal(face));
}
Tetrahedron selected = CheckBoundary(face);
if (selected == null)
{
return(Vector3D.Zero);
}
Vector3D[] v = new Vector3D[3];
for (int i = 0; i < 3; i++)
{
v[i] = face.Vertices[i].Pos;
}
Vector3D n = (v[1] - v[0]).Cross(v[0] - v[2]).Normalize();
foreach (var vt in selected.Vertices)
{
bool top = true;
foreach (var vf in face.Vertices)
{
if (vt == vf)
{
top = false;
break;
}
}
if (top && n.Dot(vt.Pos - v[0]) > 0)
{
n = -n;
TetVertex temp = face.Vertices[0];
face.Vertices[0] = face.Vertices[2];
face.Vertices[2] = temp;
break;
}
}
return(n);
}
public static Vector3D ComputeNormal(TetFace face)
{
if (face.OnBoundary)
{
return TetMeshUtil.ComputeNormal(face);
}
Tetrahedron selected = CheckBoundary(face);
if (selected == null)
{
return Vector3D.Zero;
}
Vector3D[] v = new Vector3D[3];
for (int i = 0; i < 3; i++)
{
v[i] = face.Vertices[i].Pos;
}
Vector3D n = (v[1] - v[0]).Cross(v[0] - v[2]).Normalize();
foreach (var vt in selected.Vertices)
{
bool top = true;
foreach (var vf in face.Vertices)
{
if (vt == vf)
{
top = false;
break;
}
}
if (top && n.Dot(vt.Pos - v[0]) > 0)
{
n = -n;
TetVertex temp = face.Vertices[0];
face.Vertices[0] = face.Vertices[2];
face.Vertices[2] = temp;
break;
}
}
return n;
}
void RefreshFace()
{
TetMesh mesh = GlobalData.Instance.TetMesh;
this.onLoad = true;
this.faceView.Rows.Clear();
this.faceView.Rows.Add(mesh.Faces.Count);
for (int i = 0; i < mesh.Faces.Count; i++)
{
TetFace f = mesh.Faces[i];
DataGridViewRow row = this.faceView.Rows[i];
row.Cells["FIndex"].Value = f.Index;
row.Cells["FFlag"].Value = f.Flag;
row.Cells["FBoundary"].Value = f.OnBoundary;
row.Cells["FV0"].Value = f.Vertices[0].Index;
row.Cells["FV1"].Value = f.Vertices[1].Index;
row.Cells["FV2"].Value = f.Vertices[2].Index;
}
this.onLoad = false;
}
public static Vector3D ComputeNormal(TetFace face)
{
if (face.Tetras.Count != 1)
{
return(Vector3D.Zero);
}
Vector3D[] v = new Vector3D[3];
for (int i = 0; i < 3; i++)
{
v[i] = face.Vertices[i].Pos;
}
Vector3D n = (v[1] - v[0]).Cross(v[2] - v[0]).Normalize();
foreach (var vt in face.Tetras[0].Vertices)
{
bool top = true;
foreach (var vf in face.Vertices)
{
if (vt == vf)
{
top = false;
break;
}
}
if (top && n.Dot(vt.Pos - v[0]) > 0)
{
n = -n;
TetVertex temp = face.Vertices[0];
face.Vertices[0] = face.Vertices[2];
face.Vertices[2] = temp;
break;
}
}
return(n);
}
public static Vector3D GetMidPoint(TetFace face)
{
return((face.Vertices[0].Pos + face.Vertices[1].Pos + face.Vertices[2].Pos) / 3);
}
void ReadFaceFile()
{
string[] all = File.ReadAllLines(faceFile);
int[] arr = ReadIntLine(GetFirstLine(all));
foreach (var line in GetRemainingLine(all))
{
arr = ReadIntLine(line);
TetFace face = new TetFace();
face.Vertices.Add(mesh.Vertices[arr[1]]);
face.Vertices.Add(mesh.Vertices[arr[2]]);
face.Vertices.Add(mesh.Vertices[arr[3]]);
face.Vertices.TrimExcess();
face.Index = mesh.Faces.Count;
face.B = arr[4] == 1;
mesh.Faces.Add(face);
}
}
public static Vector3D GetMidPoint(TetFace face)
{
return (face.Vertices[0].Pos + face.Vertices[1].Pos + face.Vertices[2].Pos) / 3;
}