/// <summary>
/// Maps an asyncmesh into a renderable mesh.
/// </summary>
public static void Apply(AsyncMesh source, Mesh destination)
{
destination.vertices = source.Vertices;
destination.normals = source.Normals;
destination.triangles = source.Triangles;
destination.uv = source.UVs;
}
/// <summary>
/// Performs a mesh subdivision.
/// </summary>
/// <param name="mesh">The mesh to subdivide.</param>
public void Subdivide(AsyncMesh mesh)
{
_newVectices = new Dictionary <uint, int>();
_vertices = new List <Vector3>(mesh.Vertices);
_normals = new List <Vector3>(mesh.Normals);
_uvs = new List <Vector2>(mesh.UVs);
_indices = new List <int>();
int[] triangles = mesh.Triangles;
for (int i = 0; i < triangles.Length; i += 3)
{
int i1 = triangles[i + 0];
int i2 = triangles[i + 1];
int i3 = triangles[i + 2];
int a = GetNewVertex(i1, i2);
int b = GetNewVertex(i2, i3);
int c = GetNewVertex(i3, i1);
_indices.Add(i1); _indices.Add(a); _indices.Add(c);
_indices.Add(i2); _indices.Add(b); _indices.Add(a);
_indices.Add(i3); _indices.Add(c); _indices.Add(b);
_indices.Add(a); _indices.Add(b); _indices.Add(c); // center triangle
}
mesh.Vertices = _vertices.ToArray();
mesh.Normals = _normals.ToArray();
mesh.Triangles = _indices.ToArray();
mesh.UVs = _uvs.ToArray();
}
// Decodes a Draco mesh, creates a Unity mesh from the decoded data and
// adds the Unity mesh to meshes. encodedData is the compressed Draco mesh.
public unsafe AsyncMesh LoadMesh(byte[] encodedData, MeshAttributes attributes)
{
DracoMesh *mesh = null;
if (DecodeDracoMesh(encodedData, encodedData.Length, &mesh) <= 0)
{
Debug.Log("Failed: Decoding error.");
return(null);
}
AsyncMesh unityMesh = CreateAsyncMesh(mesh, attributes);
int numFaces = mesh->numFaces;
ReleaseDracoMesh(&mesh);
if (numFaces > 0)
{
return(unityMesh);
}
else
{
return(null);
}
}
// Creates a Unity mesh from the decoded Draco mesh.
public unsafe AsyncMesh CreateAsyncMesh(DracoMesh *dracoMesh, MeshAttributes attributes)
{
int numFaces = dracoMesh->numFaces;
AsyncMesh mesh = new AsyncMesh();
mesh.tris = new int[dracoMesh->numFaces * 3];
mesh.verts = new Vector3[dracoMesh->numVertices];
// Copy face indices.
DracoData *indicesData;
GetMeshIndices(dracoMesh, &indicesData);
int elementSize =
DataTypeSize((GLTFUtilityDracoLoader.DataType)indicesData->dataType);
int *indices = (int * )(indicesData->data);
var indicesPtr = UnsafeUtility.AddressOf(ref mesh.tris[0]);
UnsafeUtility.MemCpy(indicesPtr, indices,
mesh.tris.Length * elementSize);
ReleaseDracoData(&indicesData);
DracoAttribute *attr = null;
// Copy positions.
if (GetAttributeByUniqueId(dracoMesh, attributes.pos, &attr))
{
DracoData *posData = null;
GetAttributeData(dracoMesh, attr, &posData);
elementSize = DataTypeSize((GLTFUtilityDracoLoader.DataType)posData->dataType) *
attr->numComponents;
var newVerticesPtr = UnsafeUtility.AddressOf(ref mesh.verts[0]);
UnsafeUtility.MemCpy(newVerticesPtr, (void * )posData->data,
dracoMesh->numVertices * elementSize);
ReleaseDracoData(&posData);
ReleaseDracoAttribute(&attr);
}
// Copy normals.
if (GetAttributeByUniqueId(dracoMesh, attributes.norms, &attr))
{
DracoData *normData = null;
if (GetAttributeData(dracoMesh, attr, &normData))
{
elementSize =
DataTypeSize((GLTFUtilityDracoLoader.DataType)normData->dataType) *
attr->numComponents;
mesh.norms = new Vector3[dracoMesh->numVertices];
var newNormalsPtr = UnsafeUtility.AddressOf(ref mesh.norms[0]);
UnsafeUtility.MemCpy(newNormalsPtr, (void * )normData->data,
dracoMesh->numVertices * elementSize);
ReleaseDracoData(&normData);
ReleaseDracoAttribute(&attr);
}
}
// Copy texture coordinates.
if (GetAttributeByUniqueId(dracoMesh, attributes.uv, &attr))
{
DracoData *texData = null;
if (GetAttributeData(dracoMesh, attr, &texData))
{
elementSize =
DataTypeSize((GLTFUtilityDracoLoader.DataType)texData->dataType) *
attr->numComponents;
mesh.uv = new Vector2[dracoMesh->numVertices];
var newUVsPtr = UnsafeUtility.AddressOf(ref mesh.uv[0]);
UnsafeUtility.MemCpy(newUVsPtr, (void * )texData->data,
dracoMesh->numVertices * elementSize);
ReleaseDracoData(&texData);
ReleaseDracoAttribute(&attr);
}
}
// Copy colors.
if (GetAttributeByUniqueId(dracoMesh, attributes.col, &attr))
{
DracoData *colorData = null;
if (GetAttributeData(dracoMesh, attr, &colorData))
{
elementSize =
DataTypeSize((GLTFUtilityDracoLoader.DataType)colorData->dataType) *
attr->numComponents;
mesh.colors = new Color[dracoMesh->numVertices];
var newColorsPtr = UnsafeUtility.AddressOf(ref mesh.colors[0]);
UnsafeUtility.MemCpy(newColorsPtr, (void * )colorData->data,
dracoMesh->numVertices * elementSize);
ReleaseDracoData(&colorData);
ReleaseDracoAttribute(&attr);
}
}
// Copy weights.
Vector4[] weights = null;
if (GetAttributeByUniqueId(dracoMesh, attributes.weights, &attr))
{
DracoData *weightData = null;
if (GetAttributeData(dracoMesh, attr, &weightData))
{
elementSize =
DataTypeSize((GLTFUtilityDracoLoader.DataType)weightData->dataType) *
attr->numComponents;
if (attr->dataType == 9)
{
weights = new Vector4[dracoMesh->numVertices];
var newWeightsPtr = UnsafeUtility.AddressOf(ref weights[0]);
UnsafeUtility.MemCpy(newWeightsPtr, (void * )weightData->data,
dracoMesh->numVertices * elementSize);
}
else if (attr->dataType == 4)
{
var newWeightsInt = new Vector4 <UInt16> [dracoMesh->numVertices];
var newWeightsPtr = UnsafeUtility.AddressOf(ref newWeightsInt[0]);
UnsafeUtility.MemCpy(newWeightsPtr, (void * )weightData->data,
dracoMesh->numVertices * elementSize);
weights = newWeightsInt.Select(x => new Vector4(x.x, x.y, x.z, x.w)).ToArray();
}
ReleaseDracoData(&weightData);
ReleaseDracoAttribute(&attr);
}
}
// Copy joints.
Vector4[] joints = null;
if (GetAttributeByUniqueId(dracoMesh, attributes.joints, &attr))
{
DracoData *jointData = null;
if (GetAttributeData(dracoMesh, attr, &jointData))
{
elementSize =
DataTypeSize((GLTFUtilityDracoLoader.DataType)jointData->dataType) *
attr->numComponents;
if (attr->dataType == 9)
{
joints = new Vector4[dracoMesh->numVertices];
var newJointsPtr = UnsafeUtility.AddressOf(ref joints[0]);
UnsafeUtility.MemCpy(newJointsPtr, (void * )jointData->data,
dracoMesh->numVertices * elementSize);
}
else if (attr->dataType == 4)
{
var newJointsInt = new Vector4 <UInt16> [dracoMesh->numVertices];
var newJointsPtr = UnsafeUtility.AddressOf(ref newJointsInt[0]);
UnsafeUtility.MemCpy(newJointsPtr, (void * )jointData->data,
dracoMesh->numVertices * elementSize);
joints = newJointsInt.Select(x => new Vector4(x.x, x.y, x.z, x.w)).ToArray();
}
ReleaseDracoData(&jointData);
ReleaseDracoAttribute(&attr);
}
}
/* #if UNITY_2017_3_OR_NEWER
* mesh.indexFormat = (newVertices.Length > System.UInt16.MaxValue) ?
* UnityEngine.Rendering.IndexFormat.UInt32 :
* UnityEngine.Rendering.IndexFormat.UInt16;
#else
* if (newVertices.Length > System.UInt16.MaxValue) {
* throw new System.Exception("Draco meshes with more than 65535 vertices are only supported from Unity 2017.3 onwards.");
* }
#endif */
if (joints != null && weights != null)
{
if (joints.Length == weights.Length)
{
BoneWeight[] boneWeights = new BoneWeight[weights.Length];
for (int k = 0; k < boneWeights.Length; k++)
{
NormalizeWeights(ref weights[k]);
boneWeights[k].weight0 = weights[k].x;
boneWeights[k].weight1 = weights[k].y;
boneWeights[k].weight2 = weights[k].z;
boneWeights[k].weight3 = weights[k].w;
boneWeights[k].boneIndex0 = Mathf.RoundToInt(joints[k].x);
boneWeights[k].boneIndex1 = Mathf.RoundToInt(joints[k].y);
boneWeights[k].boneIndex2 = Mathf.RoundToInt(joints[k].z);
boneWeights[k].boneIndex3 = Mathf.RoundToInt(joints[k].w);
}
mesh.boneWeights = boneWeights;
}
else
{
Debug.LogWarning("Draco: joints and weights not same length. Skipped");
}
}
return(mesh);
}