public byte[] getAttrByte(Mesh m, GlTF_Geometry geometry)
{
byte[] byteArr = GlTF_Md5.getByte(m.vertices);
if (colorAccessor != null)
{
byteArr = GlTF_Md5.combine(byteArr, GlTF_Md5.getByte(m.colors));
}
if (normalAccessor != null)
{
if (!combineMesh)
{
normalAccessor.PibufferView.initPi();
}
byteArr = GlTF_Md5.combine(byteArr, GlTF_Md5.getByte(m.normals));
}
if (texCoord0Accessor != null)
{
if (!combineMesh)
{
texCoord0Accessor.PibufferView.initPi();
}
byteArr = GlTF_Md5.combine(byteArr, GlTF_Md5.getByte(m.uv));
}
if (texCoord1Accessor != null)
{
if (!combineMesh)
{
texCoord1Accessor.PibufferView.initPi();
}
byteArr = GlTF_Md5.combine(byteArr, GlTF_Md5.getByte(m.uv2));
}
if (texCoord2Accessor != null)
{
if (!combineMesh)
{
texCoord2Accessor.PibufferView.initPi();
}
byteArr = GlTF_Md5.combine(byteArr, GlTF_Md5.getByte(m.uv3));
}
if (texCoord3Accessor != null)
{
if (!combineMesh)
{
texCoord3Accessor.PibufferView.initPi();
}
byteArr = GlTF_Md5.combine(byteArr, GlTF_Md5.getByte(m.uv4));
}
if (lightmapTexCoordAccessor != null)
{
if (!combineMesh)
{
lightmapTexCoordAccessor.PibufferView.initPi();
}
lightmapTexCoordAccessor.PopulateWithOffsetScale(m.uv2, false);
}
if (jointAccessor != null)
{
if (!combineMesh)
{
jointAccessor.PibufferView.initPi();
}
//byteArr = GlTF_Md5.combine (byteArr,GlTF_Md5.getByte (m.boneWeights));
}
if (tangentAccessor != null)
{
if (!combineMesh)
{
tangentAccessor.PibufferView.initPi();
}
byteArr = GlTF_Md5.combine(byteArr, GlTF_Md5.getByte(m.tangents));
}
return(byteArr);
}
/// <summary>
/// 填充 Mesh 数据
/// </summary>
/// <param name="m"></param>
/// <param name="path"></param>
public void Populate(Mesh m, string path)
{
/// 属性数据
byte[] attrByte = primitives[0].attributes.getAttrByte(m, geometry);
/// 图元顶点序号数组
byte[][] indiceByte = new byte[primitives.Count][];
/// 收集 indice 数据到 indiceByte[][]
foreach (GlTF_Primitive p in primitives)
{
if (!combineMesh)
{
p.indices.PibufferView.initPi();
}
/// 获取目标 图元 顶点序号数据
int[] indice = m.GetTriangles(p.index);
int[] resArr = new int[indice.Length + 1];
int[] defArr = new int[1] {
p.materialIndex
};
/// 顶点序号数据
indice.CopyTo(resArr, 0);
/// 图元的材质序号
defArr.CopyTo(resArr, indice.Length);
indiceByte[p.index] = GlTF_Md5.getByte(resArr);
}
meshMd5 = GlTF_Md5.byteToMd5(GlTF_Md5.combine(attrByte, GlTF_Md5.combine(indiceByte)));
geometry.GeoHash = meshMd5;
GlTF_Geometry geo = geometryList.Find(x => x.GeoHash == meshMd5);
/// 没有网格信息
if (geo != null)
{
primitives = geo.primitives;
return;
}
/// 合并 - 修改MD5
if (combineMesh)
{
meshMd5 = Path.GetFileNameWithoutExtension(path) + ".mesh.bin";
}
if (primitives.Count > 0)
{
/// only populate first attributes because the data are shared between primitives仅填充第一个属性，因为数据在基元之间共享
primitives[0].attributes.Populate(m, meshMd5);
}
foreach (GlTF_Primitive p in primitives)
{
p.Populate(m, meshMd5);
}
geometry.primitives = primitives;
geometryList.Add(geometry);
if (combineMesh)
{
return;
}
GlTF_Buffer bin = GlTF_Writer.buffers.Find(buffer => buffer.uri.Contains(meshMd5));
if (bin == null)
{
GlTF_Buffer a = new GlTF_Buffer();
PifloatBufferView.byteOffset = 0;
Pivec2BufferView.byteOffset = PifloatBufferView.byteOffset + PifloatBufferView.byteLength;
Pivec3BufferView.byteOffset = Pivec2BufferView.byteOffset + Pivec2BufferView.byteLength;
Pivec4BufferView.byteOffset = Pivec3BufferView.byteOffset + Pivec3BufferView.byteLength;
Pivec4UshortBufferView.byteOffset = Pivec4BufferView.byteOffset + Pivec4BufferView.byteLength;
PiushortBufferView.byteOffset = Pivec4UshortBufferView.byteOffset + Pivec4UshortBufferView.byteLength;
filePath = Path.Combine(Path.GetDirectoryName(path), meshMd5 + ".mesh.bin");
PibinFile = File.Open(filePath, FileMode.Create);
a.uri = meshMd5 + ".mesh.bin";
//floatBufferView.PimemoryStream.WriteTo(PibinFile);
Pivec2BufferView.PimemoryStream.WriteTo(PibinFile);
Pivec3BufferView.PimemoryStream.WriteTo(PibinFile);
Pivec4BufferView.PimemoryStream.WriteTo(PibinFile);
if (m.boneWeights.Length > 0)
{
Pivec4UshortBufferView.PimemoryStream.WriteTo(PibinFile);
}
PiushortBufferView.PimemoryStream.WriteTo(PibinFile);
a.BLength = PibinFile.Length;
a.BufferviewIndex = buffers.Count;
PibinFile.Flush();
PibinFile.Close();
buffers.Add(a);
}
}