// Unity only support maximum 65534 vertices per mesh. So large meshes need
// to be splitted.
private void SplitMesh(DecodedMesh mesh, ref List <DecodedMesh> splittedMeshes)
{
int[] IndexNew = new int[maxNumVerticesPerMesh];
int BaseIndex = 0;
int FaceCount = mesh.faces.Length;
int[] FaceIndex = new int[FaceCount];
int[] NewFace = new int[FaceCount];
for (int i = 0; i < FaceCount; i++)
{
FaceIndex[i] = -1;
}
while (BaseIndex < FaceCount)
{
int uniqueCornerId = 0;
int UseIndex = 0;
int AddNew = 0;
int[] NewCorner = new int[3];
for (; BaseIndex + UseIndex < FaceCount;)
{
AddNew = 0;
for (int i = 0; i < 3; i++)
{
if (FaceIndex[mesh.faces[BaseIndex + UseIndex + i]] == -1)
{
NewCorner[AddNew] = mesh.faces[BaseIndex + UseIndex + i];
AddNew++;
}
}
if (uniqueCornerId + AddNew > maxNumVerticesPerMesh)
{
break;
}
for (int i = 0; i < AddNew; i++)
{
FaceIndex[NewCorner[i]] = uniqueCornerId;
IndexNew[uniqueCornerId] = NewCorner[i];
uniqueCornerId++;
}
for (int i = 0; i < 3; i++)
{
NewFace[UseIndex] = FaceIndex[mesh.faces[BaseIndex + UseIndex]];
UseIndex++;
}
}
for (int i = 0; i < uniqueCornerId; i++)
{
FaceIndex[IndexNew[i]] = -1;
}
DecodedMesh subMesh = new DecodedMesh();
subMesh.faces = new int[UseIndex];
Array.Copy(NewFace, subMesh.faces, UseIndex);
subMesh.vertices = new Vector3[uniqueCornerId];
for (int i = 0; i < uniqueCornerId; i++)
{
subMesh.vertices[i] = mesh.vertices[IndexNew[i]];
}
if (mesh.normals != null)
{
subMesh.normals = new Vector3[uniqueCornerId];
for (int i = 0; i < uniqueCornerId; i++)
{
subMesh.normals[i] = mesh.normals[IndexNew[i]];
}
}
if (mesh.colors != null)
{
subMesh.colors = new Color[uniqueCornerId];
for (int i = 0; i < uniqueCornerId; i++)
{
subMesh.colors[i] = mesh.colors[IndexNew[i]];
}
}
if (mesh.uvs != null)
{
subMesh.uvs = new Vector2[uniqueCornerId];
for (int i = 0; i < uniqueCornerId; i++)
{
subMesh.uvs[i] = mesh.uvs[IndexNew[i]];
}
}
splittedMeshes.Add(subMesh);
BaseIndex += UseIndex;
}
}
public unsafe int DecodeMesh(byte[] data, ref List <Mesh> meshes)
{
DracoToUnityMesh *tmpMesh;
if (DecodeMeshForUnity(data, data.Length, &tmpMesh) <= 0)
{
Debug.Log("Failed: Decoding error.");
return(-1);
}
Debug.Log("Num indices: " + tmpMesh->numFaces.ToString());
Debug.Log("Num vertices: " + tmpMesh->numVertices.ToString());
if (tmpMesh->hasNormal)
{
Debug.Log("Decoded mesh normals.");
}
if (tmpMesh->hasTexcoord)
{
Debug.Log("Decoded mesh texcoords.");
}
if (tmpMesh->hasColor)
{
Debug.Log("Decoded mesh colors.");
}
int numFaces = tmpMesh->numFaces;
int[] newTriangles = new int[tmpMesh->numFaces * 3];
for (int i = 0; i < tmpMesh->numFaces; ++i)
{
byte *addr = (byte *)tmpMesh->indices + i * 3 * 4;
newTriangles[i * 3] = *((int *)addr);
newTriangles[i * 3 + 1] = *((int *)(addr + 4));
newTriangles[i * 3 + 2] = *((int *)(addr + 8));
}
// For floating point numbers, there's no Marshal functions could directly
// read from the unmanaged data.
// TODO(zhafang): Find better way to read float numbers.
Vector3[] newVertices = new Vector3[tmpMesh->numVertices];
Vector2[] newUVs = new Vector2[0];
if (tmpMesh->hasTexcoord)
{
newUVs = new Vector2[tmpMesh->numVertices];
}
Vector3[] newNormals = new Vector3[0];
if (tmpMesh->hasNormal)
{
newNormals = new Vector3[tmpMesh->numVertices];
}
Color[] newColors = new Color[0];
if (tmpMesh->hasColor)
{
newColors = new Color[tmpMesh->numVertices];
}
int byteStridePerValue = 4;
/*
* TODO(zhafang): Change to:
* float[] pos = new float[3];
* for (int i = 0; i < tmpMesh -> numVertices; ++i) {
* Marshal.Copy(tmpMesh->position, pos, 3 * i, 3);
* for (int j = 0; j < 3; ++j) {
* newVertices[i][j] = pos[j];
* }
* }
*/
byte *posaddr = (byte *)tmpMesh->position;
byte *normaladdr = (byte *)tmpMesh->normal;
byte *coloraddr = (byte *)tmpMesh->color;
byte *uvaddr = (byte *)tmpMesh->texcoord;
for (int i = 0; i < tmpMesh->numVertices; ++i)
{
int numValuePerVertex = 3;
for (int j = 0; j < numValuePerVertex; ++j)
{
int byteStridePerVertex = byteStridePerValue * numValuePerVertex;
int OffSet = i * byteStridePerVertex + byteStridePerValue * j;
newVertices[i][j] = *((float *)(posaddr + OffSet));
if (tmpMesh->hasNormal)
{
newNormals[i][j] = *((float *)(normaladdr + OffSet));
}
if (tmpMesh->hasColor)
{
newColors[i][j] = *((float *)(coloraddr + OffSet));
}
}
if (tmpMesh->hasTexcoord)
{
numValuePerVertex = 2;
for (int j = 0; j < numValuePerVertex; ++j)
{
int byteStridePerVertex = byteStridePerValue * numValuePerVertex;
newUVs[i][j] = *((float *)(uvaddr + (i * byteStridePerVertex + byteStridePerValue * j)));
}
}
}
Marshal.FreeCoTaskMem(tmpMesh->indices);
Marshal.FreeCoTaskMem(tmpMesh->position);
if (tmpMesh->hasNormal)
{
Marshal.FreeCoTaskMem(tmpMesh->normal);
}
if (tmpMesh->hasTexcoord)
{
Marshal.FreeCoTaskMem(tmpMesh->texcoord);
}
if (tmpMesh->hasColor)
{
Marshal.FreeCoTaskMem(tmpMesh->color);
}
Marshal.FreeCoTaskMem((IntPtr)tmpMesh);
if (newVertices.Length > maxNumVerticesPerMesh)
{
// Unity only support maximum 65534 vertices per mesh. So large meshes
// need to be splitted.
DecodedMesh decodedMesh = new DecodedMesh();
decodedMesh.vertices = newVertices;
decodedMesh.faces = newTriangles;
if (newUVs.Length != 0)
{
decodedMesh.uvs = newUVs;
}
if (newNormals.Length != 0)
{
decodedMesh.normals = newNormals;
}
if (newColors.Length != 0)
{
decodedMesh.colors = newColors;
}
List <DecodedMesh> splittedMeshes = new List <DecodedMesh> ();
SplitMesh(decodedMesh, ref splittedMeshes);
for (int i = 0; i < splittedMeshes.Count; ++i)
{
Mesh mesh = new Mesh();
mesh.vertices = splittedMeshes [i].vertices;
mesh.triangles = splittedMeshes [i].faces;
if (splittedMeshes [i].uvs != null)
{
mesh.uv = splittedMeshes [i].uvs;
}
if (splittedMeshes [i].colors != null)
{
mesh.colors = splittedMeshes[i].colors;
}
if (splittedMeshes [i].normals != null)
{
mesh.normals = splittedMeshes [i].normals;
}
else
{
Debug.Log("Sub mesh doesn't have normals, recomputed.");
mesh.RecalculateNormals();
}
mesh.RecalculateBounds();
meshes.Add(mesh);
}
}
else
{
Mesh mesh = new Mesh();
mesh.vertices = newVertices;
mesh.triangles = newTriangles;
if (newUVs.Length != 0)
{
mesh.uv = newUVs;
}
if (newNormals.Length != 0)
{
mesh.normals = newNormals;
}
else
{
mesh.RecalculateNormals();
Debug.Log("Mesh doesn't have normals, recomputed.");
}
if (newColors.Length != 0)
{
mesh.colors = newColors;
}
mesh.RecalculateBounds();
meshes.Add(mesh);
}
// TODO(zhafang): Resize mesh to the a proper scale.
return(numFaces);
}
// Unity only support maximum 65534 vertices per mesh. So large meshes need
// to be splitted.
private void SplitMesh(DecodedMesh mesh, ref List <DecodedMesh> splittedMeshes)
{
List <int> facesLeft = new List <int>();
for (int i = 0; i < mesh.faces.Length; ++i)
{
facesLeft.Add(mesh.faces[i]);
}
int numSubMeshes = 0;
List <int> newCorners = new List <int>();
Dictionary <int, int> indexToNewIndex = new Dictionary <int, int>();
List <int> tmpLeftFaces = new List <int>();
List <int> facesExtracted = new List <int>();
List <Vector3> verticesExtracted = new List <Vector3>();
while (facesLeft.Count > 0)
{
Debug.Log("Faces left: " + facesLeft.Count.ToString());
numSubMeshes++;
tmpLeftFaces.Clear();
facesExtracted.Clear();
verticesExtracted.Clear();
int uniqueCornerId = 0;
indexToNewIndex.Clear();
for (int face = 0; face < facesLeft.Count / 3; ++face)
{
newCorners.Clear();
// If all indices has appeared or there's still space for more vertices.
for (int corner = 0; corner < 3; ++corner)
{
if (!indexToNewIndex.ContainsKey(facesLeft[face * 3 + corner]))
{
newCorners.Add(facesLeft[face * 3 + corner]);
}
}
if (newCorners.Count + uniqueCornerId > maxNumVerticesPerMesh)
{
// Save face for the next sub-mesh.
for (int corner = 0; corner < 3; ++corner)
{
tmpLeftFaces.Add(facesLeft[face * 3 + corner]);
}
}
else
{
// Add new corners.
for (int i = 0; i < newCorners.Count; ++i)
{
indexToNewIndex.Add(newCorners[i], uniqueCornerId);
verticesExtracted.Add(mesh.vertices[newCorners[i]]);
uniqueCornerId++;
}
// Add face to this sub-mesh.
for (int corner = 0; corner < 3; ++corner)
{
facesExtracted.Add(
indexToNewIndex[facesLeft[face * 3 + corner]]);
}
}
}
DecodedMesh subMesh = new DecodedMesh();
subMesh.faces = facesExtracted.ToArray();
subMesh.vertices = verticesExtracted.ToArray();
splittedMeshes.Add(subMesh);
facesLeft = tmpLeftFaces;
}
}
public unsafe int DecodeMesh(byte[] data, ref List <Mesh> meshes)
{
DracoToUnityMesh *tmpMesh;
if (DecodeMeshForUnity(data, data.Length, &tmpMesh) <= 0)
{
Debug.Log("Failed: Decoding error.");
return(-1);
}
Debug.Log("Num indices: " + tmpMesh->numFaces.ToString());
Debug.Log("Num vertices: " + tmpMesh->numVertices.ToString());
int numFaces = tmpMesh->numFaces;
int[] newTriangles = new int[tmpMesh->numFaces * 3];
for (int i = 0; i < tmpMesh->numFaces; ++i)
{
newTriangles[i * 3] = Marshal.ReadInt32(tmpMesh->indices, i * 3 * 4);
newTriangles[i * 3 + 1] =
Marshal.ReadInt32(tmpMesh->indices, i * 3 * 4 + 4);
newTriangles[i * 3 + 2] =
Marshal.ReadInt32(tmpMesh->indices, i * 3 * 4 + 8);
}
// For floating point numbers, there's no Marshal functions could directly
// read from the unmanaged data.
// TODO(zhafang): Find better way to read float numbers.
Vector3[] newVertices = new Vector3[tmpMesh->numVertices];
int byteStridePerValue = 4;
int numValuePerVertex = 3;
int byteStridePerVertex = byteStridePerValue * numValuePerVertex;
/*
* TODO(zhafang): Change to:
* float[] pos = new float[3];
* for (int i = 0; i < tmpMesh -> numVertices; ++i) {
* Marshal.Copy(tmpMesh->position, pos, 3 * i, 3);
* for (int j = 0; j < 3; ++j) {
* newVertices[i][j] = pos[j];
* }
* }
*/
for (int i = 0; i < tmpMesh->numVertices; ++i)
{
for (int j = 0; j < 3; ++j)
{
newVertices[i][j] =
ReadFloatFromIntPtr(
tmpMesh->position,
i * byteStridePerVertex + byteStridePerValue * j);
}
}
Marshal.FreeCoTaskMem(tmpMesh->indices);
Marshal.FreeCoTaskMem(tmpMesh->position);
Marshal.FreeCoTaskMem((IntPtr)tmpMesh);
if (newVertices.Length > maxNumVerticesPerMesh)
{
// Unity only support maximum 65534 vertices per mesh. So large meshes
// need to be splitted.
DecodedMesh decodedMesh = new DecodedMesh();
decodedMesh.vertices = newVertices;
decodedMesh.faces = newTriangles;
List <DecodedMesh> splittedMeshes = new List <DecodedMesh>();
SplitMesh(decodedMesh, ref splittedMeshes);
for (int i = 0; i < splittedMeshes.Count; ++i)
{
Mesh mesh = new Mesh();
mesh.vertices = splittedMeshes[i].vertices;
mesh.triangles = splittedMeshes[i].faces;
mesh.RecalculateBounds();
mesh.RecalculateNormals();
meshes.Add(mesh);
}
}
else
{
Mesh mesh = new Mesh();
mesh.vertices = newVertices;
mesh.triangles = newTriangles;
mesh.RecalculateBounds();
mesh.RecalculateNormals();
meshes.Add(mesh);
}
// TODO(zhafang): Resize mesh to the a proper scale.
return(numFaces);
}
// Unity only support maximum 65534 vertices per mesh. So large meshes need
// to be splitted.
private void SplitMesh(DecodedMesh mesh, ref List <DecodedMesh> splittedMeshes)
{
// Map between new indices on a splitted mesh and old indices on the
// original mesh.
int[] newToOldIndexMap = new int[maxNumVerticesPerMesh];
// Index of the first unprocessed corner.
int baseCorner = 0;
int indicesCount = mesh.indices.Length;
// Map between old indices of the original mesh and indices on the currently
// processed sub-mesh. Inverse of |newToOldIndexMap|.
int[] oldToNewIndexMap = new int[indicesCount];
int[] newIndices = new int[indicesCount];
// Set mapping between existing vertex indices and new vertex indices to
// a default value.
for (int i = 0; i < indicesCount; i++)
{
oldToNewIndexMap[i] = -1;
}
// Number of added vertices for the currently processed sub-mesh.
int numAddedVertices = 0;
// Process all corners (faces) of the original mesh.
while (baseCorner < indicesCount)
{
// Reset the old to new indices map that may have been set by previously
// processed sub-meshes.
for (int i = 0; i < numAddedVertices; i++)
{
oldToNewIndexMap[newToOldIndexMap[i]] = -1;
}
numAddedVertices = 0;
// Number of processed corners on the current sub-mesh.
int numProcessedCorners = 0;
// Local storage for indices added to the new sub-mesh for a currently
// processed face.
int[] newlyAddedIndices = new int[3];
// Sub-mesh processing starts here.
for (; baseCorner + numProcessedCorners < indicesCount;)
{
// Number of vertices that we need to add to the current sub-mesh.
int verticesAdded = 0;
for (int i = 0; i < 3; i++)
{
if (oldToNewIndexMap[mesh.indices[baseCorner + numProcessedCorners + i]] == -1)
{
newlyAddedIndices[verticesAdded] = mesh.indices[baseCorner + numProcessedCorners + i];
verticesAdded++;
}
}
// If the number of new vertices that we need to add is larger than the
// allowed limit, we need to stop processing the current sub-mesh.
// The current face will be processed again for the next sub-mesh.
if (numAddedVertices + verticesAdded > maxNumVerticesPerMesh)
{
break;
}
// Update mapping between old an new vertex indices.
for (int i = 0; i < verticesAdded; i++)
{
oldToNewIndexMap[newlyAddedIndices[i]] = numAddedVertices;
newToOldIndexMap[numAddedVertices] = newlyAddedIndices[i];
numAddedVertices++;
}
for (int i = 0; i < 3; i++)
{
newIndices[numProcessedCorners] = oldToNewIndexMap[mesh.indices[baseCorner + numProcessedCorners]];
numProcessedCorners++;
}
}
// Sub-mesh processing done.
DecodedMesh subMesh = new DecodedMesh();
subMesh.indices = new int[numProcessedCorners];
Array.Copy(newIndices, subMesh.indices, numProcessedCorners);
subMesh.vertices = new Vector3[numAddedVertices];
for (int i = 0; i < numAddedVertices; i++)
{
subMesh.vertices[i] = mesh.vertices[newToOldIndexMap[i]];
}
if (mesh.normals != null)
{
subMesh.normals = new Vector3[numAddedVertices];
for (int i = 0; i < numAddedVertices; i++)
{
subMesh.normals[i] = mesh.normals[newToOldIndexMap[i]];
}
}
if (mesh.colors != null)
{
subMesh.colors = new Color[numAddedVertices];
for (int i = 0; i < numAddedVertices; i++)
{
subMesh.colors[i] = mesh.colors[newToOldIndexMap[i]];
}
}
if (mesh.uvs != null)
{
subMesh.uvs = new Vector2[numAddedVertices];
for (int i = 0; i < numAddedVertices; i++)
{
subMesh.uvs[i] = mesh.uvs[newToOldIndexMap[i]];
}
}
splittedMeshes.Add(subMesh);
baseCorner += numProcessedCorners;
}
}
public unsafe int DecodeMesh(byte[] data, ref List <Mesh> meshes)
{
DracoToUnityMesh *tmpMesh;
if (DecodeMeshForUnity(data, data.Length, &tmpMesh) <= 0)
{
Debug.Log("Failed: Decoding error.");
return(-1);
}
Debug.Log("Num indices: " + tmpMesh->numFaces.ToString());
Debug.Log("Num vertices: " + tmpMesh->numVertices.ToString());
if (tmpMesh->hasNormal)
{
Debug.Log("Decoded mesh normals.");
}
if (tmpMesh->hasTexcoord)
{
Debug.Log("Decoded mesh texcoords.");
}
if (tmpMesh->hasColor)
{
Debug.Log("Decoded mesh colors.");
}
int numFaces = tmpMesh->numFaces;
int[] newTriangles = new int[tmpMesh->numFaces * 3];
for (int i = 0; i < tmpMesh->numFaces; ++i)
{
byte *addr = (byte *)tmpMesh->indices + i * 3 * 4;
newTriangles[i * 3] = *((int *)addr);
newTriangles[i * 3 + 1] = *((int *)(addr + 4));
newTriangles[i * 3 + 2] = *((int *)(addr + 8));
}
// For floating point numbers, there's no Marshal functions could directly
// read from the unmanaged data.
// TODO(zhafang): Find better way to read float numbers.
Vector3[] newVertices = new Vector3[tmpMesh->numVertices];
Vector2[] newUVs = new Vector2[0];
if (tmpMesh->hasTexcoord)
{
newUVs = new Vector2[tmpMesh->numVertices];
}
Vector3[] newNormals = new Vector3[0];
if (tmpMesh->hasNormal)
{
newNormals = new Vector3[tmpMesh->numVertices];
}
Color[] newColors = new Color[0];
if (tmpMesh->hasColor)
{
newColors = new Color[tmpMesh->numVertices];
}
int byteStridePerValue = 4;
byte *posaddr = (byte *)tmpMesh->position;
byte *normaladdr = (byte *)tmpMesh->normal;
byte *coloraddr = (byte *)tmpMesh->color;
byte *uvaddr = (byte *)tmpMesh->texcoord;
for (int i = 0; i < tmpMesh->numVertices; ++i)
{
int numValuePerVertex = 3;
for (int j = 0; j < numValuePerVertex; ++j)
{
int byteStridePerVertex = byteStridePerValue * numValuePerVertex;
int OffSet = i * byteStridePerVertex + byteStridePerValue * j;
newVertices[i][j] = *((float *)(posaddr + OffSet));
if (tmpMesh->hasNormal)
{
newNormals[i][j] = *((float *)(normaladdr + OffSet));
}
}
if (tmpMesh->hasColor)
{
numValuePerVertex = 4;
for (int j = 0; j < numValuePerVertex; ++j)
{
int byteStridePerVertex = byteStridePerValue * numValuePerVertex;
newColors[i][j] = *((float *)(coloraddr + (i * byteStridePerVertex + byteStridePerValue * j)));
}
}
if (tmpMesh->hasTexcoord)
{
numValuePerVertex = 2;
for (int j = 0; j < numValuePerVertex; ++j)
{
int byteStridePerVertex = byteStridePerValue * numValuePerVertex;
newUVs[i][j] = *((float *)(uvaddr + (i * byteStridePerVertex + byteStridePerValue * j)));
}
}
}
ReleaseUnityMesh(&tmpMesh);
if (newVertices.Length > maxNumVerticesPerMesh)
{
// Unity only support maximum 65534 vertices per mesh. So large meshes
// need to be splitted.
DecodedMesh decodedMesh = new DecodedMesh();
decodedMesh.vertices = newVertices;
decodedMesh.indices = newTriangles;
if (newUVs.Length != 0)
{
decodedMesh.uvs = newUVs;
}
if (newNormals.Length != 0)
{
decodedMesh.normals = newNormals;
}
if (newColors.Length != 0)
{
decodedMesh.colors = newColors;
}
List <DecodedMesh> splittedMeshes = new List <DecodedMesh> ();
SplitMesh(decodedMesh, ref splittedMeshes);
for (int i = 0; i < splittedMeshes.Count; ++i)
{
Mesh mesh = new Mesh();
mesh.vertices = splittedMeshes [i].vertices;
mesh.triangles = splittedMeshes [i].indices;
if (splittedMeshes [i].uvs != null)
{
mesh.uv = splittedMeshes [i].uvs;
}
if (splittedMeshes [i].colors != null)
{
mesh.colors = splittedMeshes[i].colors;
}
if (splittedMeshes [i].normals != null)
{
mesh.normals = splittedMeshes [i].normals;
}
else
{
Debug.Log("Sub mesh doesn't have normals, recomputed.");
mesh.RecalculateNormals();
}
mesh.RecalculateBounds();
meshes.Add(mesh);
}
}
else
{
Mesh mesh = new Mesh();
mesh.vertices = newVertices;
mesh.triangles = newTriangles;
if (newUVs.Length != 0)
{
mesh.uv = newUVs;
}
if (newNormals.Length != 0)
{
mesh.normals = newNormals;
}
else
{
mesh.RecalculateNormals();
Debug.Log("Mesh doesn't have normals, recomputed.");
}
if (newColors.Length != 0)
{
mesh.colors = newColors;
}
// Scale and translate the decoded mesh so it would be visible to
// a new camera's default settings.
float scale = 0.5f / mesh.bounds.extents.x;
if (0.5f / mesh.bounds.extents.y < scale)
{
scale = 0.5f / mesh.bounds.extents.y;
}
if (0.5f / mesh.bounds.extents.z < scale)
{
scale = 0.5f / mesh.bounds.extents.z;
}
Vector3[] vertices = mesh.vertices;
int i = 0;
while (i < vertices.Length)
{
vertices[i] *= scale;
i++;
}
mesh.vertices = vertices;
mesh.RecalculateBounds();
Vector3 translate = mesh.bounds.center;
translate.x = 0 - mesh.bounds.center.x;
translate.y = 0 - mesh.bounds.center.y;
translate.z = 2 - mesh.bounds.center.z;
i = 0;
while (i < vertices.Length)
{
vertices[i] += translate;
i++;
}
mesh.vertices = vertices;
mesh.RecalculateBounds();
meshes.Add(mesh);
}
return(numFaces);
}