public static TriMesh Clone(TriMesh mesh)
{
TriMesh newMesh = new TriMesh();
for (int i = 0; i < mesh.Vertices.Count; i++)
{
VertexTraits traits = new VertexTraits(mesh.Vertices[i].Traits.Position.x,
mesh.Vertices[i].Traits.Position.y,
mesh.Vertices[i].Traits.Position.z);
newMesh.Vertices.Add(traits);
}
TriMesh.Vertex[] faceVetices = new TriMesh.Vertex[3];
for (int i = 0; i < mesh.Faces.Count; i++)
{
int faceVertexIndex1 = mesh.Faces[i].GetVertex(0).Index;
int faceVertexIndex2 = mesh.Faces[i].GetVertex(1).Index;
int faceVertexIndex3 = mesh.Faces[i].GetVertex(2).Index;
faceVetices[0] = newMesh.Vertices[faceVertexIndex1];
faceVetices[1] = newMesh.Vertices[faceVertexIndex2];
faceVetices[2] = newMesh.Vertices[faceVertexIndex3];
newMesh.Faces.AddTriangles(faceVetices);
}
newMesh.TrimExcess();
return newMesh;
}
public static TriMesh CreateCylinderPlane(int m, int n, double r,
double l, double maxU, double maxV, int diff)
{
TriMesh mesh = new TriMesh();
TriMesh.Vertex[,] arr = new HalfEdgeMesh.Vertex[m, n];
for (int i = 0; i < m; i++)
{
double x = l / m * i - l / 2;
for (int j = 0; j < n; j++)
{
double y = l / n * j - l / 2;
VertexTraits trait = new VertexTraits(x, y, 0);
trait.UV = new Vector2D(x, y);
arr[i, j] = mesh.Vertices.Add(trait);
}
}
for (int i = 0; i < m - 1; i++)
{
for (int j = 0; j < n - diff; j++)
{
int ni = i + 1;
int nj = (j + 1) % n;
mesh.Faces.AddTriangles(arr[i, nj], arr[ni, nj],
arr[ni, j], arr[i, j]);
}
}
return(mesh);
}
public static TriMesh CreateCylinder(int m, int n, double r,
double l, double maxU, double maxV, int diff)
{
TriMesh mesh = new TriMesh();
TriMesh.Vertex[,] arr = new HalfEdgeMesh.Vertex[m, n];
for (int i = 0; i < m; i++)
{
double z = l / m * i - l / 2;
double v = maxV / m * i;
for (int j = 0; j < n; j++)
{
double x = r * Math.Cos(Math.PI * 2 / n * j);
double y = r * Math.Sin(Math.PI * 2 / n * j);
double u = maxU / n * j;
VertexTraits trait = new VertexTraits(x, y, z);
trait.UV = new Vector2D(u, v);
arr[i, j] = mesh.Vertices.Add(trait);
}
}
for (int i = 0; i < m - 1; i++)
{
for (int j = 0; j < n - diff; j++)
{
int ni = i + 1;
int nj = (j + 1) % n;
mesh.Faces.AddTriangles(arr[i, nj], arr[ni, nj],
arr[ni, j], arr[i, j]);
}
}
return(mesh);
}
public static TriMesh CreatePlaneTest(int m, int n, double l)
{
TriMesh mesh = new TriMesh();
TriMesh.Vertex[,] arr = new HalfEdgeMesh.Vertex[m + 1, n + 1];
for (int i = 0; i <= m; i++)
{
double x = l / m * i;
for (int j = 0; j <= n; j++)
{
double y = l / n * j;
VertexTraits trait = new VertexTraits(x, y, 0);
trait.UV = new Vector2D(x, y);
arr[i, j] = mesh.Vertices.Add(trait);
}
}
for (int i = 0; i < m; i++)
{
for (int j = 0; j < n; j++)
{
int ni = i + 1;
int nj = j + 1;
mesh.Faces.AddTriangles(arr[i, nj], arr[ni, nj],
arr[ni, j], arr[i, j]);
}
}
return(mesh);
}
public static TriMesh Clone(TriMesh mesh)
{
TriMesh newMesh = new TriMesh();
for (int i = 0; i < mesh.Vertices.Count; i++)
{
VertexTraits traits = new VertexTraits(mesh.Vertices[i].Traits.Position.x,
mesh.Vertices[i].Traits.Position.y,
mesh.Vertices[i].Traits.Position.z);
newMesh.Vertices.Add(traits);
}
TriMesh.Vertex[] faceVetices = new TriMesh.Vertex[3];
for (int i = 0; i < mesh.Faces.Count; i++)
{
int faceVertexIndex1 = mesh.Faces[i].GetVertex(0).Index;
int faceVertexIndex2 = mesh.Faces[i].GetVertex(1).Index;
int faceVertexIndex3 = mesh.Faces[i].GetVertex(2).Index;
faceVetices[0] = newMesh.Vertices[faceVertexIndex1];
faceVetices[1] = newMesh.Vertices[faceVertexIndex2];
faceVetices[2] = newMesh.Vertices[faceVertexIndex3];
newMesh.Faces.AddTriangles(faceVetices);
}
newMesh.TrimExcess();
return(newMesh);
}
/// <summary>
/// Adds a vertex to the mesh with the specified vertex traits.
/// </summary>
/// <param name="vertexTraits">The custom traits for the vertex to add to the mesh.</param>
/// <returns>The vertex created by this method.</returns>
public Vertex Add(VertexTraits vertexTraits)
{
Vertex v = new Vertex(vertexTraits);
mesh.AppendToVertexList(v);
return(v);
}
public static PolygonMesh BuildDual(TriMesh mesh, EnumDual type)
{
TriMeshModify.RepaireAllHole(mesh);
PolygonMesh.Vertex[] faceMap = new HalfEdgeMesh.Vertex[mesh.Faces.Count];
PolygonMesh.Vertex[] edgeMap = new HalfEdgeMesh.Vertex[mesh.Edges.Count];
PolygonMesh pm = new PolygonMesh();
foreach (var face in mesh.Faces)
{
Vector3D center = Vector3D.Zero;
switch (type)
{
case EnumDual.DualA:
center = TriMeshUtil.GetMidPoint(face);
break;
case EnumDual.DualB:
TriMesh.Vertex vertex0 = face.GetVertex(0);
TriMesh.Vertex vertex1 = face.GetVertex(1);
TriMesh.Vertex vertex2 = face.GetVertex(2);
Triangle triangle = new Triangle(vertex0.Traits.Position,
vertex1.Traits.Position,
vertex2.Traits.Position);
center = triangle.ComputeCircumCenter();
break;
default:
break;
}
PolygonMesh.Vertex v = new HalfEdgeMesh.Vertex(new VertexTraits(center));
faceMap[face.Index] = v;
pm.AppendToVertexList(v);
}
foreach (var edge in mesh.Edges)
{
VertexTraits trait = new VertexTraits(TriMeshUtil.GetMidPoint(edge));
PolygonMesh.Vertex v = new HalfEdgeMesh.Vertex(trait);
edgeMap[edge.Index] = v;
pm.AppendToVertexList(v);
}
foreach (var v in mesh.Vertices)
{
List <PolygonMesh.Vertex> list = new List <HalfEdgeMesh.Vertex>();
foreach (var hf in v.HalfEdges)
{
list.Add(faceMap[hf.Face.Index]);
list.Add(edgeMap[hf.Edge.Index]);
}
list.Reverse();
pm.Faces.Add(list.ToArray());
}
return(pm);
}
public static PolygonMesh BuildDual(TriMesh mesh, EnumDual type)
{
TriMeshModify.RepaireAllHole(mesh);
PolygonMesh.Vertex[] faceMap = new HalfEdgeMesh.Vertex[mesh.Faces.Count];
PolygonMesh.Vertex[] edgeMap = new HalfEdgeMesh.Vertex[mesh.Edges.Count];
PolygonMesh pm = new PolygonMesh();
foreach (var face in mesh.Faces)
{
Vector3D center = Vector3D.Zero;
switch (type)
{
case EnumDual.DualA:
center = TriMeshUtil.GetMidPoint(face);
break;
case EnumDual.DualB:
TriMesh.Vertex vertex0 = face.GetVertex(0);
TriMesh.Vertex vertex1 = face.GetVertex(1);
TriMesh.Vertex vertex2 = face.GetVertex(2);
Triangle triangle = new Triangle(vertex0.Traits.Position,
vertex1.Traits.Position,
vertex2.Traits.Position);
center = triangle.ComputeCircumCenter();
break;
default:
break;
}
PolygonMesh.Vertex v = new HalfEdgeMesh.Vertex(new VertexTraits(center));
faceMap[face.Index] = v;
pm.AppendToVertexList(v);
}
foreach (var edge in mesh.Edges)
{
VertexTraits trait = new VertexTraits(TriMeshUtil.GetMidPoint(edge));
PolygonMesh.Vertex v = new HalfEdgeMesh.Vertex(trait);
edgeMap[edge.Index] = v;
pm.AppendToVertexList(v);
}
foreach (var v in mesh.Vertices)
{
List<PolygonMesh.Vertex> list = new List<HalfEdgeMesh.Vertex>();
foreach (var hf in v.HalfEdges)
{
list.Add(faceMap[hf.Face.Index]);
list.Add(edgeMap[hf.Edge.Index]);
}
list.Reverse();
pm.Faces.Add(list.ToArray());
}
return pm;
}
public TriMesh ConvertTriMesh(MFnMesh mesh)
{
if (mesh == null)
{
MGlobal.displayInfo("Mesh is null \n");
}
TriMesh trimesh = new TriMesh();
MIntArray indices = new MIntArray();
MIntArray triangleCounts = new MIntArray();
MPointArray points = new MPointArray();
mesh.getTriangles(triangleCounts, indices);
mesh.getPoints(points);
// Get the triangle indices
for (int i = 0; i < (int)points.length; ++i)
{
MPoint pt = points[i];
VertexTraits trait = new VertexTraits(pt.x, pt.y, pt.z);
trimesh.Vertices.Add(trait);
}
MGlobal.displayInfo(indices.Count.ToString() + "\n");
int j = 0;
while (j < indices.Count)
{
int a = indices[j];
j++;
int b = indices[j];
j++;
int c = indices[j];
j++;
trimesh.Faces.AddTriangles(trimesh.Vertices[a], trimesh.Vertices[b], trimesh.Vertices[c]);
}
return(trimesh);
}
/// <summary>
/// Creates a vertex with the given traits.
/// </summary>
/// <param name="vertexTraits">Traits for this vertex.</param>
public Vertex(VertexTraits vertexTraits)
{
Traits = vertexTraits;
}
/// <summary>
/// Creates a vertex with the given traits.
/// </summary>
/// <param name="vertexTraits">Traits for this vertex.</param>
public Vertex(VertexTraits vertexTraits)
{
Traits = vertexTraits;
}
public static TriMesh CreateCylinderPlane(int m, int n, double r,
double l, double maxU, double maxV, int diff)
{
TriMesh mesh = new TriMesh();
TriMesh.Vertex[,] arr = new HalfEdgeMesh.Vertex[m, n];
for (int i = 0; i < m; i++)
{
double x = l / m * i - l / 2;
for (int j = 0; j < n; j++)
{
double y = l / n * j - l / 2;
VertexTraits trait = new VertexTraits(x,y, 0);
trait.UV = new Vector2D(x, y);
arr[i, j] = mesh.Vertices.Add(trait);
}
}
for (int i = 0; i < m - 1; i++)
{
for (int j = 0; j < n - diff; j++)
{
int ni = i + 1;
int nj = (j + 1) % n;
mesh.Faces.AddTriangles(arr[i, nj], arr[ni, nj],
arr[ni, j], arr[i, j]);
}
}
return mesh;
}
public static TriMesh CreateCylinder(int m, int n, double r,
double l, double maxU, double maxV,int diff)
{
TriMesh mesh = new TriMesh();
TriMesh.Vertex[,] arr = new HalfEdgeMesh.Vertex[m, n];
for (int i = 0; i < m; i++)
{
double z = l / m * i - l / 2;
double v = maxV / m * i;
for (int j = 0; j < n; j++)
{
double x = r * Math.Cos(Math.PI * 2 / n * j);
double y = r * Math.Sin(Math.PI * 2 / n * j);
double u = maxU / n * j;
VertexTraits trait = new VertexTraits(x, y, z);
trait.UV = new Vector2D(u, v);
arr[i, j] = mesh.Vertices.Add(trait);
}
}
for (int i = 0; i < m - 1; i++)
{
for (int j = 0; j < n-diff; j++)
{
int ni = i + 1;
int nj = (j + 1) % n;
mesh.Faces.AddTriangles(arr[i, nj], arr[ni, nj],
arr[ni, j], arr[i, j]);
}
}
return mesh;
}
public static TriMesh CreatePlaneFolded(int m, int n, double l)
{
TriMesh mesh = new TriMesh();
TriMesh.Vertex[,] arr = new HalfEdgeMesh.Vertex[m + 1, n + 1];
for (int i = 0; i <= m; i++)
{
double x = l / m * i ;
double temp = 0;
for (int j = 0; j <= n/2; j++)
{
double y = l / n * j ;
VertexTraits trait = new VertexTraits(x, y, 0);
trait.UV = new Vector2D(x, y);
arr[i, j] = mesh.Vertices.Add(trait);
temp = y;
}
for (int j = 1; j <= n / 2; j++)
{
double y = l / n * j;
VertexTraits trait = new VertexTraits(x, temp, y);
trait.UV = new Vector2D(x, y);
arr[i, n / 2+j] = mesh.Vertices.Add(trait);
}
}
for (int i = 0; i < m; i++)
{
for (int j = 0; j < n; j++)
{
int ni = i + 1;
int nj = j + 1;
mesh.Faces.AddTriangles(arr[i, nj], arr[ni, nj],
arr[ni, j], arr[i, j]);
}
}
return mesh;
}
public TriMesh ConvertTriMesh(MFnMesh mesh)
{
if(mesh==null)
{
MGlobal.displayInfo("Mesh is null \n");
}
TriMesh trimesh = new TriMesh();
MIntArray indices = new MIntArray();
MIntArray triangleCounts = new MIntArray();
MPointArray points = new MPointArray();
mesh.getTriangles(triangleCounts, indices);
mesh.getPoints(points);
// Get the triangle indices
for (int i = 0; i < (int)points.length; ++i)
{
MPoint pt = points[i];
VertexTraits trait = new VertexTraits(pt.x, pt.y, pt.z);
trimesh.Vertices.Add(trait);
}
MGlobal.displayInfo( indices.Count.ToString() +"\n");
int j=0;
while(j<indices.Count)
{
int a = indices[j];
j++;
int b = indices[j];
j++;
int c = indices[j];
j++;
trimesh.Faces.AddTriangles(trimesh.Vertices[a], trimesh.Vertices[b], trimesh.Vertices[c]);
}
return trimesh;
}
public static TriMesh ConvertToTriMesh(NonManifoldMesh mesh)
{
TriMesh triMesh = new GraphicResearchHuiZhao.TriMesh();
triMesh.Traits.HasFaceVertexNormals = true;
triMesh.Traits.HasTextureCoordinates = true;
if (mesh.VertexNormal == null)
{
triMesh.Traits.HasFaceVertexNormals = false;
}
else
{
triMesh.Traits.HasFaceVertexNormals = true;
}
if (mesh.TextextCoordinate == null)
{
triMesh.Traits.HasTextureCoordinates = false;
}
else
{
triMesh.Traits.HasTextureCoordinates = true;
}
int vertexCount = mesh.VertexCount;
int faceCount = mesh.FaceCount;
for (int i = 0; i < vertexCount; i++)
{
VertexTraits traits = new VertexTraits((float)mesh.VertexPos[i * 3], (float)mesh.VertexPos[i * 3 + 1], (float)mesh.VertexPos[i * 3 + 2]);
triMesh.Vertices.Add(traits);
}
TriMesh.Vertex[] vertices = new TriMesh.Vertex[3];
for (int i = 0; i < faceCount; i++)
{
vertices[0] = triMesh.Vertices[mesh.FaceIndex[i * 3]];
vertices[1] = triMesh.Vertices[mesh.FaceIndex[i * 3 + 1]];
vertices[2] = triMesh.Vertices[mesh.FaceIndex[i * 3 + 2]];
triMesh.Faces.AddTriangles(vertices);
}
if (triMesh.Traits.HasTextureCoordinates)
{
TriMesh.HalfEdge faceVertex;
foreach (TriMesh.Face face in triMesh.Faces)
{
foreach (TriMesh.Vertex vertex in face.Vertices)
{
faceVertex = face.FindHalfedgeTo(vertex);
if (faceVertex != null) // Make sure vertex belongs to face if triangularization is on
{
faceVertex.Traits.TextureCoordinate = new Vector2D(mesh.TextextCoordinate[vertex.Index * 2], mesh.TextextCoordinate[vertex.Index * 2 + 1]);
}
}
}
}
if (triMesh.Traits.HasFaceVertexNormals)
{
TriMesh.HalfEdge faceVertex;
foreach (TriMesh.Face face in triMesh.Faces)
{
foreach (TriMesh.Vertex vertex in face.Vertices)
{
faceVertex = face.FindHalfedgeTo(vertex);
if (faceVertex != null) // Make sure vertex belongs to face if triangularization is on
{
faceVertex.Traits.Normal = new Vector3D(mesh.FaceNormal, vertex.Index);
}
}
}
}
//if (triMesh.Traits.HasTextureCoordinates)
//{
// foreach (HalfEdgeMesh.TriMesh.Vertex vertex in triMesh.Vertices )
// {
// vertex.Traits.TextureCoordinate = new Vector2d(mesh.TextextCoordinate[vertex.Index * 2], mesh.TextextCoordinate[vertex.Index * 2 + 1]);
// }
//}
//if (triMesh.Traits.HasFaceVertexNormals)
//{
// foreach (HalfEdgeMesh.TriMesh.Vertex vertex in triMesh.Vertices)
// {
// vertex.Traits.Normal = new Vector3d(mesh.FaceNormal, vertex.Index);
// }
//}
return(triMesh);
}
TriMesh.Vertex AddMid(TriMesh.Vertex v1, TriMesh.Vertex v2, double rate)
{
VertexTraits trait = new VertexTraits(v1.Traits.Position * (1 - rate) + v2.Traits.Position * rate);
return this.mesh.Vertices.Add(trait);
}
TriMesh.Vertex AddMid(TriMesh.Vertex v1, TriMesh.Vertex v2, double rate)
{
VertexTraits trait = new VertexTraits(v1.Traits.Position * (1 - rate) + v2.Traits.Position * rate);
return(this.mesh.Vertices.Add(trait));
}
public static TriMesh ConvertToTriMesh(NonManifoldMesh mesh)
{
TriMesh triMesh = new GraphicResearchHuiZhao.TriMesh();
triMesh.Traits.HasFaceVertexNormals = true;
triMesh.Traits.HasTextureCoordinates = true;
if (mesh.VertexNormal == null)
{
triMesh.Traits.HasFaceVertexNormals = false;
}
else
{
triMesh.Traits.HasFaceVertexNormals = true;
}
if (mesh.TextextCoordinate == null)
{
triMesh.Traits.HasTextureCoordinates = false;
}
else
{
triMesh.Traits.HasTextureCoordinates = true;
}
int vertexCount = mesh.VertexCount;
int faceCount = mesh.FaceCount;
for (int i = 0; i < vertexCount; i++)
{
VertexTraits traits = new VertexTraits((float)mesh.VertexPos[i * 3], (float)mesh.VertexPos[i * 3 + 1], (float)mesh.VertexPos[i * 3 + 2]);
triMesh.Vertices.Add(traits);
}
TriMesh.Vertex[] vertices = new TriMesh.Vertex[3];
for (int i = 0; i < faceCount; i++)
{
vertices[0] = triMesh.Vertices[mesh.FaceIndex[i * 3]];
vertices[1] = triMesh.Vertices[mesh.FaceIndex[i * 3 + 1]];
vertices[2] = triMesh.Vertices[mesh.FaceIndex[i * 3 + 2]];
triMesh.Faces.AddTriangles(vertices);
}
if (triMesh.Traits.HasTextureCoordinates)
{
TriMesh.HalfEdge faceVertex;
foreach (TriMesh.Face face in triMesh.Faces)
{
foreach (TriMesh.Vertex vertex in face.Vertices)
{
faceVertex = face.FindHalfedgeTo(vertex);
if (faceVertex != null) // Make sure vertex belongs to face if triangularization is on
{
faceVertex.Traits.TextureCoordinate = new Vector2D(mesh.TextextCoordinate[vertex.Index * 2], mesh.TextextCoordinate[vertex.Index * 2 + 1]);
}
}
}
}
if (triMesh.Traits.HasFaceVertexNormals)
{
TriMesh.HalfEdge faceVertex;
foreach (TriMesh.Face face in triMesh.Faces)
{
foreach (TriMesh.Vertex vertex in face.Vertices)
{
faceVertex = face.FindHalfedgeTo(vertex);
if (faceVertex != null) // Make sure vertex belongs to face if triangularization is on
{
faceVertex.Traits.Normal = new Vector3D(mesh.FaceNormal, vertex.Index);
}
}
}
}
//if (triMesh.Traits.HasTextureCoordinates)
//{
// foreach (HalfEdgeMesh.TriMesh.Vertex vertex in triMesh.Vertices )
// {
// vertex.Traits.TextureCoordinate = new Vector2d(mesh.TextextCoordinate[vertex.Index * 2], mesh.TextextCoordinate[vertex.Index * 2 + 1]);
// }
//}
//if (triMesh.Traits.HasFaceVertexNormals)
//{
// foreach (HalfEdgeMesh.TriMesh.Vertex vertex in triMesh.Vertices)
// {
// vertex.Traits.Normal = new Vector3d(mesh.FaceNormal, vertex.Index);
// }
//}
return triMesh;
}