/// <summary>
/// Copy mesh data from a KrablMesh meshEdges to a Unity Mesh.
/// </summary>
/// <param name='meshEdges'>
/// The input mesh.
/// </param>
/// <param name='unityMesh'>
/// The output Unity Mesh. Any data it contains will be overwritten.
/// </param>
public static void MeshEdgesToUnityMesh(KrablMesh.MeshEdges meshEdges, UnityEngine.Mesh unityMesh)
{
meshEdges.InvalidateDegenerateFaces();
// Ops.TriangulateWithEdges(meshEdges);
int numFaces = meshEdges.faceCount();
List <ExportVertex> exVerts = new List <ExportVertex>(numFaces * 3);
List <Vector3> verts = new List <Vector3>();
List <int>[] indices = new List <int> [meshEdges.numMaterials];
List <int> vertexTable = new List <int>();
// Create a list of all vertices based on face corners (= lots of duplicates)
for (int material = 0; material < meshEdges.numMaterials; ++material)
{
indices[material] = new List <int>();
for (int faceIndex = 0; faceIndex < numFaces; ++faceIndex)
{
Face f = meshEdges.faces[faceIndex];
if (f.valid && f.material == material)
{
int cornerCount = f.cornerCount;
for (int cornerIndex = 0; cornerIndex < cornerCount; ++cornerIndex)
{
ExportVertex ev = new ExportVertex();
ev.vertIndex = f.v[cornerIndex];
ev.cornerCount = cornerCount;
ev.material = material;
ev.coords = meshEdges.vertices[f.v[cornerIndex]].coords;
ev.normal = f.vertexNormal[cornerIndex];
ev.uv1 = f.uv1[cornerIndex];
ev.uv2 = f.uv2[cornerIndex];
vertexTable.Add(exVerts.Count);
exVerts.Add(ev);
}
}
}
}
vertexTable.Sort(delegate(int a, int b) {
return(ExportVertex.CompareEV(exVerts[a], exVerts[b]));
});
// Create index list to collapse list to the unique verts added to the final mesh
// compile unique mesh arrays
List <Vector3> normals = new List <Vector3>();
List <Vector2> uv1 = new List <Vector2>();
List <Vector2> uv2 = new List <Vector2>();
List <Color> vertColors = new List <Color>();
List <BoneWeight> boneWeights = new List <BoneWeight>();
int[] uniqueTable = new int[exVerts.Count];
int numUnique = 0;
for (int i = 0; i < exVerts.Count; ++i)
{
int exIndex = vertexTable[i];
if (i == 0 || ExportVertex.CompareEV(exVerts[vertexTable[i - 1]], exVerts[exIndex]) != 0)
{
verts.Add(exVerts[exIndex].coords);
normals.Add(exVerts[exIndex].normal);
uv1.Add(exVerts[exIndex].uv1);
uv2.Add(exVerts[exIndex].uv2);
Vertex v = meshEdges.vertices[exVerts[exIndex].vertIndex];
vertColors.Add(v.color);
boneWeights.Add(v.boneWeight);
numUnique++;
}
uniqueTable[exIndex] = numUnique - 1;
}
// Debug.Log("Num exVerts " + exVerts.Length + " num collapsed " + numUnique + " vertsCount " + verts.Count);
#if false // Quad topology seams to be broken on windows directx! Disabled it for now.
if (meshEdges.topology == MeshTopology.Triangles) // quads/tris only
{
for (int i = 0; i < exVerts.Count; i += 3)
{
int mat = exVerts[i].material;
indices[mat].Add(uniqueTable[i]);
indices[mat].Add(uniqueTable[i + 1]);
indices[mat].Add(uniqueTable[i + 2]);
}
}
else if (meshEdges.topology == MeshTopology.Quads)
{
for (int i = 0; i < exVerts.Count; i += 4)
{
int mat = exVerts[i].material;
indices[mat].Add(uniqueTable[i]);
indices[mat].Add(uniqueTable[i + 1]);
indices[mat].Add(uniqueTable[i + 2]);
indices[mat].Add(uniqueTable[i + 3]);
}
}
else
#endif
{
// Mixed tris/quads need to split quads
int cornerCount, mat;
int i0, i1, i2, i3;
for (i0 = 0; i0 < exVerts.Count;)
{
i1 = i0 + 1;
i2 = i0 + 2;
cornerCount = exVerts[i0].cornerCount;
mat = exVerts[i0].material;
if (cornerCount == 3)
{
indices[mat].Add(uniqueTable[i0]);
indices[mat].Add(uniqueTable[i1]);
indices[mat].Add(uniqueTable[i2]);
i0 += 3;
}
else // Quad!
{
i3 = i0 + 3;
Vector3 diag02 = exVerts[i0].coords - exVerts[i2].coords;
Vector3 diag13 = exVerts[i1].coords - exVerts[i3].coords;
if (diag02.sqrMagnitude > diag13.sqrMagnitude)
{
// If 0-2 if shorter than 1-3
indices[mat].Add(uniqueTable[i0]);
indices[mat].Add(uniqueTable[i1]);
indices[mat].Add(uniqueTable[i2]);
indices[mat].Add(uniqueTable[i0]);
indices[mat].Add(uniqueTable[i2]);
indices[mat].Add(uniqueTable[i3]);
}
else
{
indices[mat].Add(uniqueTable[i0]);
indices[mat].Add(uniqueTable[i1]);
indices[mat].Add(uniqueTable[i3]);
indices[mat].Add(uniqueTable[i1]);
indices[mat].Add(uniqueTable[i2]);
indices[mat].Add(uniqueTable[i3]);
}
i0 += 4;
}
}
}
unityMesh.Clear(false);
unityMesh.name = "KMesh";
if (verts.Count >= 65536 || exVerts.Count >= 65536 * 3)
{
Debug.Log("Cannot create Unity mesh from KrablMesh.MeshEdges. " +
"The mesh is too large (>65k). " +
"Vertices: " + verts.Count + " Triangles: " + exVerts.Count / 3);
return;
}
unityMesh.subMeshCount = meshEdges.numMaterials;
unityMesh.vertices = verts.ToArray();
unityMesh.normals = normals.ToArray();
if (meshEdges.hasVertexColors)
{
unityMesh.colors = vertColors.ToArray();
}
if (meshEdges.hasUV1)
{
unityMesh.uv = uv1.ToArray();
}
if (meshEdges.hasUV2)
{
unityMesh.uv2 = uv2.ToArray();
}
if (meshEdges.hasBoneWeights)
{
unityMesh.bindposes = meshEdges.bindposes;
unityMesh.boneWeights = boneWeights.ToArray();
}
#if false
if (meshEdges.topology == MeshTopology.Quads)
{
for (int mat = 0; mat < meshEdges.numMaterials; ++mat)
{
unityMesh.SetIndices(indices[mat].ToArray(), UnityEngine.MeshTopology.Quads, mat);
}
}
else
#endif
{
for (int mat = 0; mat < meshEdges.numMaterials; ++mat)
{
unityMesh.SetTriangles(indices[mat].ToArray(), mat);
}
}
if (meshEdges.hasUV1 && meshEdges.calculateTangents)
{
_calculateMeshTangents(unityMesh);
}
}