protected unsafe Mesh ReadSubMesh(GensReader reader, float scale = 1)
{
uint offset; // Generic uint reused for different data
// Offsets
uint materialNameOffset, faceCount, faceOffset, vertexCount,
vertexSize, vertexOffset, vertexFormatOffset, boneCount,
boneOffset, textureUnitCount, textureUnitOffsetsOffset;
if (Header.RootNodeType == PS3RootType)
{
uint unknownOffset1 = reader.ReadUInt32(); // VertexFormat?
materialNameOffset = reader.ReadUInt32();
boneCount = reader.ReadUInt32();
boneOffset = reader.ReadUInt32(); // ?
textureUnitCount = reader.ReadUInt32();
textureUnitOffsetsOffset = reader.ReadUInt32();
// Possibly vertex format?
reader.JumpTo(unknownOffset1, false);
int unknown1 = reader.ReadInt32();
int unknown2 = reader.ReadInt32();
int unknown3 = reader.ReadInt32();
int unknown4 = reader.ReadInt32();
uint unknownOffset2 = reader.ReadUInt32();
uint unknownCount1 = reader.ReadUInt32();
vertexOffset = reader.ReadUInt32();
// TODO
throw new NotImplementedException(
"ERROR: Cannot yet read PS3 terrain-models");
}
else
{
materialNameOffset = reader.ReadUInt32();
faceCount = reader.ReadUInt32();
faceOffset = reader.ReadUInt32();
vertexCount = reader.ReadUInt32();
vertexSize = reader.ReadUInt32();
vertexOffset = reader.ReadUInt32();
vertexFormatOffset = reader.ReadUInt32();
boneCount = reader.ReadUInt32();
boneOffset = reader.ReadUInt32();
textureUnitCount = reader.ReadUInt32();
textureUnitOffsetsOffset = reader.ReadUInt32();
}
// Faces
var faces = new ushort[faceCount];
reader.JumpTo(faceOffset, false);
// Convert faces from triangle strips
// Basically taken from LibGens because I honestly
// don't think there's another way to do it lol
int newStrip = 3, newIndex = 0;
ushort face1 = 0, face2 = 0, face3 = 0, t;
uint count = 0, faceIndex = 0;
// HACK: We go through the whole loop twice, the first time just
// to get the new faceCount, second time to actually get the faces.
// This way we don't have to do any copying (yes, lists do it too)
// which is a huge performance improvement.
for (uint i = 0; i < faceCount; ++i)
{
t = reader.ReadUInt16();
faces[i] = t;
if (t == 0xFFFF)
{
newStrip = 3;
newIndex = 0;
}
else
{
newStrip -= 1;
face3 = face2;
face2 = face1;
face1 = t;
if (newStrip == 0)
{
if ((face1 != face2) && (face2 != face3) && (face1 != face3))
{
count += 3;
}
newStrip = 1;
++newIndex;
}
}
}
// Alright, we've got the new count!
// Time to actually get the faces.
var newFaces = new uint[count];
newStrip = 3; newIndex = 0;
face1 = face2 = face3 = 0;
for (uint i = 0; i < faceCount; ++i)
{
t = faces[i];
if (t == 0xFFFF)
{
newStrip = 3;
newIndex = 0;
}
else
{
newStrip -= 1;
face3 = face2;
face2 = face1;
face1 = t;
if (newStrip == 0)
{
if ((face1 != face2) && (face2 != face3) && (face1 != face3))
{
if ((newIndex % 2) == 0)
{
newFaces[faceIndex] = face1;
newFaces[++faceIndex] = face2;
newFaces[++faceIndex] = face3;
}
else
{
newFaces[faceIndex] = face3;
newFaces[++faceIndex] = face2;
newFaces[++faceIndex] = face1;
}
++faceIndex;
}
newStrip = 1;
++newIndex;
}
}
}
// Vertex Format
var vertexFormat = new List <VertexFormatElement>();
var fs = reader.BaseStream;
reader.JumpTo(vertexFormatOffset, false);
for (byte i = 0; i < 0xFF; ++i)
{
offset = reader.ReadUInt32();
if (offset > 1000)
{
break;
}
var element = new VertexFormatElement()
{
Offset = offset,
Type = reader.ReadUInt32(),
ID = reader.ReadUInt16(),
Index = reader.ReadByte()
};
vertexFormat.Add(element);
fs.ReadByte();
}
// Vertices
var data = new float[vertexCount * Mesh.StructureLength];
var idc = new float[vertexCount * 4]; // TODO: Care
// HACK: Read this stuff using pointers to avoid boundry checks.
fixed(float *dataStart = data)
fixed(float *idcp = idc)
{
float *dp; // Pointer to data
uint structStart;
for (uint i = 0; i < vertexCount; ++i)
{
// Set default vertex coloring
structStart = (i * Mesh.StructureLength);
dp = dataStart + structStart + Mesh.ColorPos;
// RGBA = 1, 1, 1, 1
*dp = 1; *++dp = 1;
*++dp = 1; *++dp = 1;
// Just to be accurate
offset = (vertexOffset + (i * vertexSize));
foreach (var element in vertexFormat)
{
reader.JumpTo(offset + element.Offset, false);
switch (element.ID)
{
// Vertex Positions
case 0:
element.Read(reader, dataStart +
structStart + Mesh.VertPos, scale);
break;
// Bone Weights
case 1:
// TODO
element.Read(reader, idcp);
break;
// Bone Indices
case 2:
// TODO
element.Read(reader, idcp);
break;
// Normals
case 3:
// TODO: Do I need to scale normals?
element.Read(reader, dataStart +
structStart + Mesh.NormPos);
break;
// UV Coordinates
case 5:
if (element.Index < 1)
{
element.Read(reader, dataStart +
structStart + Mesh.UVPos);
}
else
{
// TODO: Read multi-UV Channels
element.Read(reader, idcp);
}
break;
// Tangents
case 6:
// TODO
element.Read(reader, idcp);
break;
// Binormals
case 7:
// TODO
element.Read(reader, idcp);
break;
// Vertex Colors
case 10:
element.Read(reader, dataStart +
structStart + Mesh.ColorPos);
break;
}
}
++dp;
}
}
// Bones
reader.JumpTo(boneOffset, false);
var bones = reader.ReadBytes((int)boneCount);
// Texture Unit Offsets
var textureUnitOffsets = new uint[textureUnitCount];
reader.JumpTo(textureUnitOffsetsOffset, false);
for (uint i = 0; i < textureUnitCount; ++i)
{
textureUnitOffsets[i] = reader.ReadUInt32();
}
// Texture Units
for (uint i = 0; i < textureUnitCount; ++i)
{
// TODO: Actually use this data
reader.JumpTo(textureUnitOffsets[i], false);
uint textureUnitNameOffset = reader.ReadUInt32();
uint textureUnitID = reader.ReadUInt32();
// Texture Unit Name
reader.JumpTo(textureUnitNameOffset, false);
string textureUnitName = reader.ReadNullTerminatedString();
}
// Material Name
reader.JumpTo(materialNameOffset, false);
string materialName = reader.ReadNullTerminatedString();
// Generate a HedgeLib mesh and add it to the array
var mesh = new Mesh()
{
VertexData = data,
Triangles = newFaces,
MaterialName = materialName
};
Meshes.Add(mesh);
return(mesh);
}
