int AddViewTo(ExportingGltfData data, int bufferIndex,
int offset = 0, int count = 0)
{
var stride = Stride;
if (count == 0)
{
count = Count;
}
var slice = Bytes.GetSubArray(offset * stride, count * stride);
return(data.AppendToBuffer(slice));
}
public int AddAccessorTo(ExportingGltfData data, int bufferIndex,
// GltfBufferTargetType targetType,
bool useSparse,
Action <NativeArray <byte>, glTFAccessor> minMax = null,
int offset = 0, int count = 0)
{
if (ComponentType == AccessorValueType.FLOAT &&
AccessorType == AccessorVectorType.VEC3
)
{
var values = GetSpan <Vector3>();
// 巨大ポリゴンのモデル対策にValueTupleの型をushort -> uint へ
var sparseValuesWithIndex = new List <ValueTuple <int, Vector3> >();
for (int i = 0; i < values.Length; ++i)
{
var v = values[i];
if (v != Vector3.zero)
{
sparseValuesWithIndex.Add((i, v));
}
}
//var status = $"{sparseIndices.Count * 14}/{values.Length * 12}";
if (useSparse &&
sparseValuesWithIndex.Count > 0 && // avoid empty sparse
sparseValuesWithIndex.Count * 16 < values.Length * 12)
{
// use sparse
using (var sparseIndexBin = new NativeArray <byte>(sparseValuesWithIndex.Count * 4, Allocator.Persistent))
using (var sparseValueBin = new NativeArray <byte>(sparseValuesWithIndex.Count * 12, Allocator.Persistent))
{
var sparseIndexSpan = sparseIndexBin.Reinterpret <Int32>(1);
var sparseValueSpan = sparseValueBin.Reinterpret <Vector3>(1);
for (int i = 0; i < sparseValuesWithIndex.Count; ++i)
{
var(index, value) = sparseValuesWithIndex[i];
sparseIndexSpan[i] = index;
sparseValueSpan[i] = value;
}
var sparseIndexView = data.AppendToBuffer(sparseIndexBin);
var sparseValueView = data.AppendToBuffer(sparseValueBin);
var accessorIndex = data.Gltf.accessors.Count;
var accessor = new glTFAccessor
{
componentType = (glComponentType)ComponentType,
type = AccessorType.ToString(),
count = Count,
byteOffset = -1,
sparse = new glTFSparse
{
count = sparseValuesWithIndex.Count,
indices = new glTFSparseIndices
{
componentType = (glComponentType)AccessorValueType.UNSIGNED_INT,
bufferView = sparseIndexView,
},
values = new glTFSparseValues
{
bufferView = sparseValueView,
},
}
};
if (minMax != null)
{
minMax(sparseValueBin, accessor);
}
data.Gltf.accessors.Add(accessor);
return(accessorIndex);
}
}
}
var viewIndex = AddViewTo(data, bufferIndex, offset, count);
return(AddAccessorTo(data, viewIndex, minMax, 0, count));
}
