public static void MergeVertex(List <Vector2> vertes, List <int> indices, out List <Vector2> retained, out List <int> indexLst)
{
retained = new List <Vector2>();
indexLst = new List <int>();
GroupHash <Vertex2Hash> groups = new GroupHash <Vertex2Hash>();
for (int i = 0; i < vertes.Count; ++i)
{
groups.Add(new Vertex2Hash(i, vertes[i]));
}
List <List <Vertex2Hash> > results = groups.GetResult();
Dictionary <int, int> tmp = new Dictionary <int, int>();
for (int i = 0; i < results.Count; ++i)
{
Vector2 tmpV = new Vector2(0.0f, 0.0f);
foreach (Vertex2Hash obj in results[i])
{
tmp.Add(obj.mIndex, i);
tmpV += obj.mVertex;
}
retained.Add(tmpV * 1.0f / results[i].Count);
}
foreach (int ind in indices)
{
indexLst.Add(tmp[ind]);
}
int count = indexLst.Count / 3;
List <int> remove = new List <int>();
for (int i = 0; i < count; ++i)
{
int i1 = indexLst[i * 3];
int i2 = indexLst[i * 3 + 1];
int i3 = indexLst[i * 3 + 2];
if (i1 == i2 || i2 == i3 || i1 == i3)
{
remove.Add(i * 3);
remove.Add(i * 3 + 1);
remove.Add(i * 3 + 2);
}
}
for (int i = remove.Count - 1; i >= 0; --i)
{
indexLst.RemoveAt(remove[i]);
}
}
protected static LODMesh ParseMesh(Mesh meshIn)
{
LODMesh lodMesh = new LODMesh(meshIn);
List <Vector3> vertices = new List <Vector3>();
meshIn.GetVertices(vertices);
List <LODVertex> lodVertices = Convert(vertices);
GroupHash <LODVertex> group = new GroupHash <LODVertex>();
group.Objects = lodVertices;
List <List <LODVertex> > merged = group.GetResult();
Dictionary <int, RepeatedVertex> originalVertexMapRepeatedIndex = new Dictionary <int, RepeatedVertex>();
for (int i = 0; i < merged.Count; ++i)
{
RepeatedVertex rpv = new RepeatedVertex(merged[i], i);
lodMesh.vertices.Add(rpv);
foreach (LODVertex v in merged[i])
{
originalVertexMapRepeatedIndex.Add(v.originalIndex, rpv);
}
}
Dictionary <int, LODSubMesh> originalFaceMapSubMeshIndex = new Dictionary <int, LODSubMesh>();
int count = meshIn.subMeshCount;
List <int> triangles = new List <int>();
for (int i = 0; i < count; ++i)
{
LODSubMesh subMesh = new LODSubMesh(i);
lodMesh.subMeshes.Add(subMesh);
triangles.Clear();
meshIn.GetTriangles(triangles, i);
int cnt = triangles.Count;
for (int j = 0; j < cnt; j += 3)
{
int tmp0 = triangles[j];
int tmp1 = triangles[j + 1];
int tmp2 = triangles[j + 2];
int idx0 = originalVertexMapRepeatedIndex[tmp0].index;
int idx1 = originalVertexMapRepeatedIndex[tmp1].index;
int idx2 = originalVertexMapRepeatedIndex[tmp2].index;
int faceIndex = lodMesh.faces.Count;
originalFaceMapSubMeshIndex.Add(faceIndex, subMesh);
subMesh.faceIndices.Add(faceIndex);
lodMesh.faces.Add(new LODFace(lodMesh, lodMesh.subMeshes.Count - 1, idx0, idx1, idx2));
// 绑定临点
originalVertexMapRepeatedIndex[idx0].neighborVertices.Add(idx1);
originalVertexMapRepeatedIndex[idx0].neighborVertices.Add(idx2);
originalVertexMapRepeatedIndex[idx1].neighborVertices.Add(idx0);
originalVertexMapRepeatedIndex[idx1].neighborVertices.Add(idx2);
originalVertexMapRepeatedIndex[idx2].neighborVertices.Add(idx0);
originalVertexMapRepeatedIndex[idx2].neighborVertices.Add(idx1);
// 边
LODEdge e0 = new LODEdge(idx0, idx1);
LODEdge e1 = new LODEdge(idx0, idx2);
LODEdge e2 = new LODEdge(idx1, idx2);
LODEdge ee0 = lodMesh.edges.Find((item) => { return(e0.Equals(item)); });
LODEdge ee1 = lodMesh.edges.Find((item) => { return(e1.Equals(item)); });
LODEdge ee2 = lodMesh.edges.Find((item) => { return(e2.Equals(item)); });
if (ee0 != null)
{
ee0.Share();
}
else
{
lodMesh.edges.Add(e0);
}
if (ee1 != null)
{
ee1.Share();
}
else
{
lodMesh.edges.Add(e1);
}
if (ee2 != null)
{
ee2.Share();
}
else
{
lodMesh.edges.Add(e2);
}
// 临面
originalVertexMapRepeatedIndex[idx0].neighborFaces.Add(faceIndex);
originalVertexMapRepeatedIndex[idx1].neighborFaces.Add(faceIndex);
originalVertexMapRepeatedIndex[idx2].neighborFaces.Add(faceIndex);
}
}
//for (int i = 0; i < lodMesh.faces.Count - 1; ++i)
//{
// // Fill the neighbor faces information in face list
// for (int j = i + 1; j < lodMesh.faces.Count; ++j)
// {
// if (IsNeighbors(lodMesh, i, j))
// {
// lodMesh.faces[i].neighboringFaceIndexList.Add(j);
// lodMesh.faces[j].neighboringFaceIndexList.Add(i);
// }
// }
//}
return(lodMesh);
}