private void ExportStaticMeshLods(CStaticMeshLod lod, FArchiveWriter Ar, List <MaterialExporter>?materialExports, ETexturePlatform platform = ETexturePlatform.DesktopMobile)
{
var share = new CVertexShare();
var boneHdr = new VChunkHeader();
var infHdr = new VChunkHeader();
share.Prepare(lod.Verts);
foreach (var vert in lod.Verts)
{
share.AddVertex(vert.Position, vert.Normal);
}
ExportCommonMeshData(Ar, lod.Sections.Value, lod.Verts, lod.Indices.Value, share, materialExports, platform);
boneHdr.DataCount = 0;
boneHdr.DataSize = 120;
Ar.SerializeChunkHeader(boneHdr, "REFSKELT");
infHdr.DataCount = 0;
infHdr.DataSize = 12;
Ar.SerializeChunkHeader(infHdr, "RAWWEIGHTS");
ExportVertexColors(Ar, lod.VertexColors, lod.NumVerts);
ExportExtraUV(Ar, lod.ExtraUV.Value, lod.NumVerts, lod.NumTexCoords);
}
private void ExportSkeletalMeshLod(CSkelMeshLod lod, List <CSkelMeshBone> bones, FArchiveWriter Ar, List <MaterialExporter>?materialExports, ETexturePlatform platform = ETexturePlatform.DesktopMobile)
{
var share = new CVertexShare();
var infHdr = new VChunkHeader();
share.Prepare(lod.Verts);
foreach (var vert in lod.Verts)
{
var weightsHash = vert.PackedWeights;
for (var i = 0; i < vert.Bone.Length; i++)
{
weightsHash ^= (uint)vert.Bone[i] << i;
}
share.AddVertex(vert.Position, vert.Normal, weightsHash);
}
ExportCommonMeshData(Ar, lod.Sections.Value, lod.Verts, lod.Indices.Value, share, materialExports, platform);
ExportSkeletonData(Ar, bones);
var numInfluences = 0;
for (var i = 0; i < share.Points.Count; i++)
{
for (var j = 0; j < Constants.NUM_INFLUENCES_UE4; j++)
{
if (lod.Verts[share.VertToWedge.Value[i]].Bone[j] < 0)
{
break;
}
numInfluences++;
}
}
infHdr.DataCount = numInfluences;
infHdr.DataSize = 12;
Ar.SerializeChunkHeader(infHdr, "RAWWEIGHTS");
for (var i = 0; i < share.Points.Count; i++)
{
var v = lod.Verts[share.VertToWedge.Value[i]];
var unpackedWeights = v.UnpackWeights();
for (var j = 0; j < Constants.NUM_INFLUENCES_UE4; j++)
{
if (v.Bone[j] < 0)
{
break;
}
Ar.Write(unpackedWeights[j]);
Ar.Write(i);
Ar.Write((int)v.Bone[j]);
}
}
ExportVertexColors(Ar, lod.VertexColors, lod.NumVerts);
ExportExtraUV(Ar, lod.ExtraUV.Value, lod.NumVerts, lod.NumTexCoords);
}
public MeshExporter(USkeleton originalSkeleton)
{
MeshLods = new List <Mesh>();
MeshName = originalSkeleton.Owner?.Name ?? originalSkeleton.Name;
if (!originalSkeleton.TryConvert(out var bones) || bones.Count == 0)
{
Log.Logger.Warning($"Skeleton '{MeshName}' has no bone");
return;
}
using var Ar = new FArchiveWriter();
var mainHdr = new VChunkHeader {
TypeFlag = Constants.PSK_VERSION
};
Ar.SerializeChunkHeader(mainHdr, "ACTRHEAD");
ExportSkeletonData(Ar, bones);
MeshLods.Add(new Mesh($"{MeshName}.psk", Ar.GetBuffer(), new List <MaterialExporter>()));
}
private void ExportCommonMeshData(FArchiveWriter Ar, CMeshSection[] sections, CMeshVertex[] verts,
FRawStaticIndexBuffer indices, CVertexShare share, List <MaterialExporter>?materialExports, ETexturePlatform platform = ETexturePlatform.DesktopMobile)
{
var mainHdr = new VChunkHeader();
var ptsHdr = new VChunkHeader();
var wedgHdr = new VChunkHeader();
var facesHdr = new VChunkHeader();
var matrHdr = new VChunkHeader();
var normHdr = new VChunkHeader();
mainHdr.TypeFlag = Constants.PSK_VERSION;
Ar.SerializeChunkHeader(mainHdr, "ACTRHEAD");
var numPoints = share.Points.Count;
ptsHdr.DataCount = numPoints;
ptsHdr.DataSize = 12;
Ar.SerializeChunkHeader(ptsHdr, "PNTS0000");
for (var i = 0; i < numPoints; i++)
{
var point = share.Points[i];
point.Y = -point.Y; // MIRROR_MESH
point.Serialize(Ar);
}
var numFaces = 0;
var numVerts = verts.Length;
var numSections = sections.Length;
var wedgeMat = new int[numVerts];
for (var i = 0; i < numSections; i++)
{
var faces = sections[i].NumFaces;
numFaces += faces;
for (var j = 0; j < faces * 3; j++)
{
wedgeMat[indices[j + sections[i].FirstIndex]] = i;
}
}
wedgHdr.DataCount = numVerts;
wedgHdr.DataSize = 16;
Ar.SerializeChunkHeader(wedgHdr, "VTXW0000");
for (var i = 0; i < numVerts; i++)
{
Ar.Write(share.WedgeToVert[i]);
Ar.Write(verts[i].UV.U);
Ar.Write(verts[i].UV.V);
Ar.Write((byte)wedgeMat[i]);
Ar.Write((byte)0);
Ar.Write((short)0);
}
facesHdr.DataCount = numFaces;
if (numVerts <= 65536)
{
facesHdr.DataSize = 12;
Ar.SerializeChunkHeader(facesHdr, "FACE0000");
for (var i = 0; i < numSections; i++)
{
for (var j = 0; j < sections[i].NumFaces; j++)
{
var wedgeIndex = new ushort[3];
for (var k = 0; k < wedgeIndex.Length; k++)
{
wedgeIndex[k] = (ushort)indices[sections[i].FirstIndex + j * 3 + k];
}
Ar.Write(wedgeIndex[1]); // MIRROR_MESH
Ar.Write(wedgeIndex[0]); // MIRROR_MESH
Ar.Write(wedgeIndex[2]);
Ar.Write((byte)i);
Ar.Write((byte)0);
Ar.Write((uint)1);
}
}
}
else
{
facesHdr.DataSize = 18;
Ar.SerializeChunkHeader(facesHdr, "FACE3200");
for (var i = 0; i < numSections; i++)
{
for (var j = 0; j < sections[i].NumFaces; j++)
{
var wedgeIndex = new int[3];
for (var k = 0; k < wedgeIndex.Length; k++)
{
wedgeIndex[k] = indices[sections[i].FirstIndex + j * 3 + k];
}
Ar.Write(wedgeIndex[1]); // MIRROR_MESH
Ar.Write(wedgeIndex[0]); // MIRROR_MESH
Ar.Write(wedgeIndex[2]);
Ar.Write((byte)i);
Ar.Write((byte)0);
Ar.Write((uint)1);
}
}
}
matrHdr.DataCount = numSections;
matrHdr.DataSize = 88;
Ar.SerializeChunkHeader(matrHdr, "MATT0000");
for (var i = 0; i < numSections; i++)
{
string materialName;
if (sections[i].Material?.Load <UMaterialInterface>() is { } tex)
{
materialName = tex.Name;
materialExports?.Add(new MaterialExporter(tex, true, platform));
}