public unsafe static Mesh CreateMesh(IntPtr dracoMesh)
{
Profiler.BeginSample("CreateMesh");
DracoToUnityMesh *tmpMesh = (DracoToUnityMesh *)dracoMesh;
Log("Num indices: " + tmpMesh->numFaces.ToString());
Log("Num vertices: " + tmpMesh->numVertices.ToString());
Profiler.BeginSample("CreateMeshAlloc");
int[] newTriangles = new int[tmpMesh->numFaces * 3];
Vector3[] newVertices = new Vector3[tmpMesh->numVertices];
Profiler.EndSample();
Vector2[] newUVs = null;
Vector3[] newNormals = null;
Color[] newColors = null;
Profiler.BeginSample("CreateMeshIndices");
byte *indicesSrc = (byte *)tmpMesh->indices;
var indicesPtr = UnsafeUtility.AddressOf(ref newTriangles[0]);
UnsafeUtility.MemCpy(indicesPtr, indicesSrc, newTriangles.Length * 4);
Profiler.EndSample();
Profiler.BeginSample("CreateMeshPositions");
byte *posaddr = (byte *)tmpMesh->position;
/// TODO(atteneder): check if we can avoid mem copies with new Mesh API (2019.3?)
/// by converting void* to NativeArray via
/// NativeArrayUnsafeUtility.ConvertExistingDataToNativeArray
var newVerticesPtr = UnsafeUtility.AddressOf(ref newVertices[0]);
UnsafeUtility.MemCpy(newVerticesPtr, posaddr, tmpMesh->numVertices * 12);
Profiler.EndSample();
if (tmpMesh->hasTexcoord)
{
Profiler.BeginSample("CreateMeshUVs");
Log("Decoded mesh texcoords.");
newUVs = new Vector2[tmpMesh->numVertices];
byte *uvaddr = (byte *)tmpMesh->texcoord;
var newUVsPtr = UnsafeUtility.AddressOf(ref newUVs[0]);
UnsafeUtility.MemCpy(newUVsPtr, uvaddr, tmpMesh->numVertices * 8);
Profiler.EndSample();
}
if (tmpMesh->hasNormal)
{
Profiler.BeginSample("CreateMeshNormals");
Log("Decoded mesh normals.");
newNormals = new Vector3[tmpMesh->numVertices];
byte *normaladdr = (byte *)tmpMesh->normal;
var newNormalsPtr = UnsafeUtility.AddressOf(ref newNormals[0]);
UnsafeUtility.MemCpy(newNormalsPtr, normaladdr, tmpMesh->numVertices * 12);
Profiler.EndSample();
}
if (tmpMesh->hasColor)
{
Profiler.BeginSample("CreateMeshColors");
Log("Decoded mesh colors.");
newColors = new Color[tmpMesh->numVertices];
byte *coloraddr = (byte *)tmpMesh->color;
var newColorsPtr = UnsafeUtility.AddressOf(ref newColors[0]);
UnsafeUtility.MemCpy(newColorsPtr, coloraddr, tmpMesh->numVertices * 16);
Profiler.EndSample();
}
Profiler.BeginSample("CreateMeshRelease");
ReleaseUnityMesh(&tmpMesh);
Profiler.EndSample();
Profiler.BeginSample("CreateMeshFeeding");
Mesh mesh = new Mesh();
#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
mesh.vertices = newVertices;
mesh.SetTriangles(newTriangles, 0, true);
if (newUVs != null)
{
mesh.uv = newUVs;
}
if (newNormals != null)
{
mesh.normals = newNormals;
}
else
{
mesh.RecalculateNormals();
Log("Mesh doesn't have normals, recomputed.");
}
if (newColors != null)
{
mesh.colors = newColors;
}
Profiler.EndSample();
return(mesh);
}
public unsafe static Mesh CreateMesh(IntPtr dracoMesh, out bool hasNormals, out bool hasTexcoords)
{
Profiler.BeginSample("CreateMesh");
DracoToUnityMesh *tmpMesh = (DracoToUnityMesh *)dracoMesh;
Log("Num indices: " + tmpMesh->numFaces.ToString());
Log("Num vertices: " + tmpMesh->numVertices.ToString());
Profiler.BeginSample("CreateMeshAlloc");
int[] newTriangles = new int[tmpMesh->numFaces * 3];
Vector3[] newVertices = new Vector3[tmpMesh->numVertices];
Profiler.EndSample();
Vector2[] newUVs = null;
Vector3[] newNormals = null;
Color[] newColors = null;
Vector4[] newWeights = null;
int[] newJoints = null;
Profiler.BeginSample("CreateMeshIndices");
byte *indicesSrc = (byte *)tmpMesh->indices;
var indicesPtr = UnsafeUtility.AddressOf(ref newTriangles[0]);
UnsafeUtility.MemCpy(indicesPtr, indicesSrc, newTriangles.Length * 4);
Profiler.EndSample();
Profiler.BeginSample("CreateMeshPositions");
byte *posaddr = (byte *)tmpMesh->position;
/// TODO(atteneder): check if we can avoid mem copies with new Mesh API (2019.3?)
/// by converting void* to NativeArray via
/// NativeArrayUnsafeUtility.ConvertExistingDataToNativeArray
var newVerticesPtr = UnsafeUtility.AddressOf(ref newVertices[0]);
UnsafeUtility.MemCpy(newVerticesPtr, posaddr, tmpMesh->numVertices * 12);
Profiler.EndSample();
hasTexcoords = tmpMesh->hasTexcoord;
hasNormals = tmpMesh->hasNormal;
if (hasTexcoords)
{
Profiler.BeginSample("CreateMeshUVs");
Log("Decoded mesh texcoords.");
newUVs = new Vector2[tmpMesh->numVertices];
byte *uvaddr = (byte *)tmpMesh->texcoord;
var newUVsPtr = UnsafeUtility.AddressOf(ref newUVs[0]);
UnsafeUtility.MemCpy(newUVsPtr, uvaddr, tmpMesh->numVertices * 8);
Profiler.EndSample();
}
if (hasNormals)
{
Profiler.BeginSample("CreateMeshNormals");
Log("Decoded mesh normals.");
newNormals = new Vector3[tmpMesh->numVertices];
byte *normaladdr = (byte *)tmpMesh->normal;
var newNormalsPtr = UnsafeUtility.AddressOf(ref newNormals[0]);
UnsafeUtility.MemCpy(newNormalsPtr, normaladdr, tmpMesh->numVertices * 12);
Profiler.EndSample();
}
if (tmpMesh->hasColor)
{
Profiler.BeginSample("CreateMeshColors");
Log("Decoded mesh colors.");
newColors = new Color[tmpMesh->numVertices];
byte *coloraddr = (byte *)tmpMesh->color;
var newColorsPtr = UnsafeUtility.AddressOf(ref newColors[0]);
UnsafeUtility.MemCpy(newColorsPtr, coloraddr, tmpMesh->numVertices * 16);
Profiler.EndSample();
}
if (tmpMesh->hasWeights && tmpMesh->hasJoints)
{
Profiler.BeginSample("CreateWeights");
Log("Decoded mesh weights.");
newWeights = new Vector4[tmpMesh->numVertices];
byte *weightsAddr = (byte *)tmpMesh->weights;
var newWeightsPtr = UnsafeUtility.AddressOf(ref newWeights[0]);
UnsafeUtility.MemCpy(newWeightsPtr, weightsAddr, tmpMesh->numVertices * 16);
Profiler.EndSample();
Profiler.BeginSample("CreateJoints");
Log("Decoded mesh joints.");
newJoints = new int[tmpMesh->numVertices * 4];
byte *jointsAddr = (byte *)tmpMesh->joints;
var newJointsPtr = UnsafeUtility.AddressOf(ref newJoints[0]);
UnsafeUtility.MemCpy(newJointsPtr, jointsAddr, tmpMesh->numVertices * 16);
Profiler.EndSample();
}
Profiler.BeginSample("CreateMeshRelease");
ReleaseUnityMesh(&tmpMesh);
Profiler.EndSample();
Profiler.BeginSample("CreateMeshFeeding");
Mesh mesh = new Mesh();
#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
mesh.vertices = newVertices;
mesh.SetTriangles(newTriangles, 0, true);
if (newNormals != null)
{
mesh.normals = newNormals;
}
if (newUVs != null)
{
mesh.uv = newUVs;
}
if (newColors != null)
{
mesh.colors = newColors;
}
if (newJoints != null && newWeights != null)
{
BoneWeight[] weights = new BoneWeight[newWeights.Length];
for (int i = 0; i < weights.Length; i++)
{
Tuple <float, int>[] values = new Tuple <float, int>[] {
new Tuple <float, int>(newWeights[i].x, newJoints[i * 4]),
new Tuple <float, int>(newWeights[i].y, newJoints[i * 4 + 1]),
new Tuple <float, int>(newWeights[i].z, newJoints[i * 4 + 2]),
new Tuple <float, int>(newWeights[i].w, newJoints[i * 4 + 3])
};
Array.Sort(values, (a, b) => { return(b.Item1.CompareTo(a.Item1)); });
weights[i].boneIndex0 = values[0].Item2;
weights[i].boneIndex1 = values[1].Item2;
weights[i].boneIndex2 = values[2].Item2;
weights[i].boneIndex3 = values[3].Item2;
weights[i].weight0 = values[0].Item1;
weights[i].weight1 = values[1].Item1;
weights[i].weight2 = values[2].Item1;
weights[i].weight3 = values[3].Item1;
}
mesh.boneWeights = weights;
}
Profiler.EndSample(); // CreateMeshFeeding
Profiler.EndSample(); // CreateMesh
return(mesh);
}
