public static PICAAttributeName ToPICAAttributeName(this MBnAttributeName AttrName)
{
switch (AttrName)
{
case MBnAttributeName.Position: return(PICAAttributeName.Position);
case MBnAttributeName.Normal: return(PICAAttributeName.Normal);
case MBnAttributeName.Color: return(PICAAttributeName.Color);
case MBnAttributeName.TexCoord0: return(PICAAttributeName.TexCoord0);
case MBnAttributeName.TexCoord1: return(PICAAttributeName.TexCoord1);
case MBnAttributeName.BoneIndex: return(PICAAttributeName.BoneIndex);
case MBnAttributeName.BoneWeight: return(PICAAttributeName.BoneWeight);
default: throw new ArgumentException($"Invalid or unimplemented MBn Attribute name {AttrName}!");
}
}
public MBnVerticesDesc(BinaryReader Reader, int SubMeshesCount, bool HasBuffer)
{
this.SubMeshesCount = SubMeshesCount;
uint AttributesCount = Reader.ReadUInt32();
Attributes = new List <PICAAttribute>();
for (int Index = 0; Index < AttributesCount; Index++)
{
MBnAttributeName AttrName = (MBnAttributeName)Reader.ReadUInt32();
MBnAttributeFormat AttrFormat = (MBnAttributeFormat)Reader.ReadUInt32();
float Scale = Reader.ReadSingle();
int Elements = 4;
switch (AttrName)
{
case MBnAttributeName.Position:
case MBnAttributeName.Normal:
Elements = 3; break;
case MBnAttributeName.TexCoord0:
case MBnAttributeName.TexCoord1:
case MBnAttributeName.BoneIndex:
case MBnAttributeName.BoneWeight:
Elements = 2; break;
}
/*
* Byte attributes that are not aligned on a 2 bytes boundary (for example, Byte Vector3)
* needs to be aligned to a 2 byte boundary, so we insert a 1 byte dummy element to force alignment.
* Attributes of the same type doesn't need to be aligned however.
* For example:
* A Byte Vector3 Normal followed by a Byte Vector4 Color, followed by a Short Vector2 TexCoord is
* stored like this: NX NY NZ CR CG CB CA <Padding0> TX TX TY TY
*/
if (AttrFormat != MBnAttributeFormat.Ubyte &&
AttrFormat != MBnAttributeFormat.Byte)
{
VertexStride += VertexStride & 1;
}
int Size = Elements;
switch (AttrFormat)
{
case MBnAttributeFormat.Short: Size <<= 1; break;
case MBnAttributeFormat.Float: Size <<= 2; break;
}
VertexStride += Size;
Attributes.Add(new PICAAttribute()
{
Name = AttrName.ToPICAAttributeName(),
Format = AttrFormat.ToPICAAttributeFormat(),
Elements = Elements,
Scale = Scale
});
}
VertexStride += VertexStride & 1;
BufferLength = Reader.ReadInt32();
if (HasBuffer)
{
ReadBuffer(Reader, false);
}
}
