/// <summary>
///
/// Meshes
///
/// Parse mesh data
/// Function decides if we are updating an already existing mesh or creating a new one.
/// If a new mesh has been created this function will go through stored mesh instances
/// and check if it can create new mesh instances.
/// </summary>
public static void ParseMeshData(System.IntPtr meshDataPtr)
{
try
{
var meshData = (MeshData)System.Runtime.InteropServices.Marshal.PtrToStructure(meshDataPtr, typeof(MeshData));
// Convert unmanaged to managed memory
ManagedMeshData managedMeshData = MeshHandler.ManageMeshMemory(meshData);
// If all dependants are here, create or update the mesh
bool dependencySuccess = MeshHandler.DependencyCheck(managedMeshData, meshData.entityToken);
if (dependencySuccess)
{
ParseMeshData(meshData, managedMeshData);
// Delete the data
ImportMenu.stpUnityDeleteMeshData(meshDataPtr);
}
else
{
// If we are not able to create or update store the mesh data and try later
meshDataStore.Add(meshDataPtr);
}
}
catch (System.Exception e)
{
Debug.LogException(e);
// Delete the data
ImportMenu.stpUnityDeleteMeshData(meshDataPtr);
}
}
/// <summary>
/// Create mesh
/// Function that goes through the process of creating new mesh items.
/// </summary>
public static bool CreateMesh(MeshData meshData, ManagedMeshData managedMeshData)
{
Debug.LogFormat("Mesh - Token:{0}, Parent:{1}, {2} positions, {3} facesets", meshData.entityToken, meshData.entityParentToken, meshData.positionsNum, meshData.facesetsNum);
// Get the index format of the mesh
UnityEngine.Rendering.IndexFormat indexFormat;
int maxVertexLimitSplit;
GetIndexBufferConfiguration(
managedMeshData.positions.Length,
out indexFormat,
out maxVertexLimitSplit);
// Check if we need to split the mesh
if (maxVertexLimitSplit == 0)
{
// Create simple mesh asset, create it's prefab object
// and add it to the package mapper
Mesh newMesh = new Mesh();
UpdateMeshData(
managedMeshData.positions,
managedMeshData.normals,
managedMeshData.uvs,
managedMeshData.facesetNum,
managedMeshData.indices,
indexFormat,
ref newMesh
);
CreateSimpleMeshAsset(
meshData.entityToken,
meshData.entityParentToken,
meshData.displayName,
managedMeshData.facesetNum,
managedMeshData.materials,
newMesh);
}
else
{
// Create split mesh assets, create hierarchy of prefabs
// and add the root prefab to the package mapper
List <Mesh> meshList = CreateSplitMeshes(
meshData.entityToken,
meshData.displayName,
managedMeshData
);
CreateSplitMeshAsset(
meshData.entityToken,
meshData.displayName,
meshData.entityParentToken,
managedMeshData.facesetNum,
managedMeshData.materials,
meshList);
}
return(true);
}
/// <summary>
/// Dependency check
/// Checks if all of the dependencies of the mesh are available in Unity
/// </summary>
public static bool DependencyCheck(ManagedMeshData meshData, string entityToken)
{
// Check if we have materials available
for (var i = 0; i < meshData.facesetNum; ++i)
{
if (!System.String.IsNullOrEmpty(meshData.materials[i]))
{
// Check if we have a material instance or material definition ready for this mesh
if (!PackageMapper.GetMaterialFromToken(meshData.materials[i]))
{
// TODO: messages slow down the recieve mechanism and spam the log
//Debug.LogWarningFormat("Material '{0}' for '{1}' has not yet been created!",
// meshData.materials[i],
// entityToken);
return(false);
}
}
}
return(true);
}
// Iterate through mesh store that were missing dependants and check if we can create new mesh objects
// or update existing mesh objects
public static void IterateMeshStore()
{
for (int i = meshDataStore.Count - 1; i >= 0; i--)
{
MeshData meshData = (MeshData)System.Runtime.InteropServices.Marshal.PtrToStructure(meshDataStore[i], typeof(MeshData));
// Convert unmanaged to managed memory
ManagedMeshData managedMeshData = MeshHandler.ManageMeshMemory(meshData);
// If all dependants are here, create or update the mesh
if (MeshHandler.DependencyCheck(managedMeshData, meshData.entityToken))
{
ParseMeshData(meshData, managedMeshData);
// Delete the data
ImportMenu.stpUnityDeleteMeshData(meshDataStore[i]);
// Remove from the store
meshDataStore.RemoveAt(i);
}
}
}
/// <summary>
/// Manage mesh memory
/// Converts the marshaled unmanaged mesh memory to managed
/// </summary>
public static ManagedMeshData ManageMeshMemory(MeshData meshData)
{
ManagedMeshData managedMeshData = new ManagedMeshData();
managedMeshData.positions = MarshallPositions((int)meshData.positionsNum, meshData.positions);
managedMeshData.normals = ((int)meshData.normalsNum > 0) ? MarshallNormals((int)meshData.normalsNum, meshData.normals) : null;
managedMeshData.materials = new StringCollection();
managedMeshData.indices = new List <int[]>();
var facesetdataSize = System.Runtime.InteropServices.Marshal.SizeOf(typeof(FacesetData));
var currentReadPtr = meshData.facesets;
for (var i = 0; i < (int)meshData.facesetsNum; ++i)
{
FacesetData fs = (FacesetData)System.Runtime.InteropServices.Marshal.PtrToStructure(currentReadPtr, typeof(FacesetData));
managedMeshData.materials.Add(fs.materialName);
managedMeshData.indices.Add(MarshallTriangleIndices((int)fs.indicesNum, fs.indices));
currentReadPtr = MarshalData.AddToIntPtr(currentReadPtr, facesetdataSize);
}
managedMeshData.facesetNum = (int)meshData.facesetsNum;
managedMeshData.uvs = new List <List <Vector2> >();
currentReadPtr = meshData.uvSets;
var uvSetDataSize = System.Runtime.InteropServices.Marshal.SizeOf(typeof(UVData));
for (var i = 0; i < (int)meshData.uvSetNum; ++i)
{
UVData uvData = (UVData)System.Runtime.InteropServices.Marshal.PtrToStructure(currentReadPtr, typeof(UVData));
// Note: Not currently using triangle indices
//managedMeshData.indices.Add(MarshallTriangleIndices((int)uvData.indicesNum, uvData.indices));
managedMeshData.uvs.Add(MarshallUVData((int)uvData.uvsNum, uvData.uvs));
currentReadPtr = MarshalData.AddToIntPtr(currentReadPtr, uvSetDataSize);
}
managedMeshData.uvNum = (int)meshData.uvSetNum;
return(managedMeshData);
}
private static void ParseMeshData(MeshData meshData, ManagedMeshData managedMeshData)
{
// Check if the mesh already exists in the package mapper
if (PackageMapper.TokenExistsInCache(meshData.entityToken))
{
// If mesh exists try to update it
MeshHandler.UpdateMesh(meshData, managedMeshData);
}
else
{
// Create a new mesh object in Unity
MeshHandler.CreateMesh(meshData, managedMeshData);
// This loop starts over if we created a parent and a child is waiting in the store
bool newItemCreated = true;
while (newItemCreated)
{
// Iterate through mesh instance store and try to create or update
// mesh instances that this mesh is a dependent of
IterateMeshInstanceStore(out newItemCreated);
}
}
}
UpdateSimpleMeshAsset(
string entityToken,
string displayName,
ManagedMeshData managedMeshData,
Mesh mesh,
GameObject meshPrefab)
{
// Update the mesh renderer
Material[] materials = GetMeshMaterials(managedMeshData.facesetNum, managedMeshData.materials, entityToken);
var meshRenderer = meshPrefab.GetComponent <MeshRenderer>();
if (meshRenderer)
{
meshRenderer.materials = materials;
}
// Update mesh name
mesh.name = displayName;
AssetDatabase.SaveAssets();
return(true);
}
CreateSplitMeshes(
string entityToken,
string displayName,
ManagedMeshData managedMeshData)
{
List <Mesh> meshList = new List <Mesh>();
int max_vertex_limit_split;
UnityEngine.Rendering.IndexFormat indexFormat;
GetIndexBufferConfiguration(
managedMeshData.positions.Length,
out indexFormat,
out max_vertex_limit_split);
// now split the geometry into N meshes, as children of this new game object, and the identity transform
var current_offset = 0;
var remaining_vertices = managedMeshData.positions.Length;
var split_index = 0;
while (remaining_vertices > 0)
{
var segment_size = System.Math.Min(remaining_vertices, max_vertex_limit_split);
var positionSegment = CopyArraySegment(managedMeshData.positions, current_offset, segment_size);
var normalSegment = CopyArraySegment(managedMeshData.normals, current_offset, segment_size);
if (positionSegment == null || normalSegment == null)
{
throw new System.Exception(System.String.Format("Unindexed mesh creation failure! Token:{0} Name:{1} Part:{2}", entityToken, displayName, System.String.Format("Split_{0}", split_index)));
}
var indicesSegment = new List <int[]>();
for (var i = 0; i < managedMeshData.indices.Count; ++i)
{
var segment = CopyArraySegmentAndRebase(managedMeshData.indices[i], current_offset, segment_size);
if (segment == null)
{
throw new System.Exception(System.String.Format("Unindexed mesh creation failure! Token:{0} Name:{1} Part:{2}", entityToken, displayName, System.String.Format("Split_{0}", split_index)));
}
indicesSegment.Add(segment);
}
var uvSegment = new List <List <Vector2> >();
for (var i = 0; i < managedMeshData.uvNum; ++i)
{
uvSegment.Add(CopyListSegment(managedMeshData.uvs[i], current_offset, segment_size));
}
Mesh mesh = new Mesh();
UpdateMeshData(
positionSegment,
normalSegment,
uvSegment,
managedMeshData.facesetNum,
indicesSegment,
indexFormat,
ref mesh);
if (!mesh)
{
throw new System.Exception(System.String.Format("Unindexed mesh creation failure! Token:{0} Name:{1} Part:{2}", entityToken, displayName, System.String.Format("Split_{0}", split_index)));
}
meshList.Add(mesh);
current_offset += segment_size;
remaining_vertices -= segment_size;
++split_index;
}
return(meshList);
}
/// <summary>
/// Update mesh
/// Function that goes through the process of updating existing mesh item.
/// Checking for unindexed or indexed meshes.
/// </summary>
public static bool UpdateMesh(MeshData meshData, ManagedMeshData managedMeshData)
{
Debug.LogFormat("Mesh Update - Token:{0}, Parent:{1}, {2} positions, {3} facesets", meshData.entityToken, meshData.entityParentToken, meshData.positionsNum, meshData.facesetsNum);
// Find existing mesh
Mesh mesh = PackageMapper.GetMeshFromToken(meshData.entityToken);
if (!mesh)
{
return(false);
}
// Get the index format of the mesh
UnityEngine.Rendering.IndexFormat indexFormat;
int maxVertexLimitSplit;
GetIndexBufferConfiguration(
managedMeshData.positions.Length,
out indexFormat,
out maxVertexLimitSplit);
// Get the prefab object
GameObject prefab = PackageMapper.GetObjectFromToken(meshData.entityToken) as GameObject;
// Check if we need to split the mesh
if (maxVertexLimitSplit == 0)
{
// Update existing mesh
UpdateMeshData(
managedMeshData.positions,
managedMeshData.normals,
managedMeshData.uvs,
managedMeshData.facesetNum,
managedMeshData.indices,
indexFormat,
ref mesh
);
UpdateSimpleMeshAsset(
meshData.entityToken,
meshData.displayName,
managedMeshData,
mesh,
prefab
);
}
else
{
// Delete prefab first
AssetDatabase.DeleteAsset(AssetDatabase.GetAssetPath(prefab));
// Create split mesh assets, create hierarchy of prefabs
// and add the root prefab to the package mapper
List <Mesh> meshList = CreateSplitMeshes(
meshData.entityToken,
meshData.displayName,
managedMeshData
);
CreateSplitMeshAsset(
meshData.entityToken,
meshData.displayName,
meshData.entityParentToken,
managedMeshData.facesetNum,
managedMeshData.materials,
meshList);
}
mesh.UploadMeshData(false);
return(true);
}