public static int ExtendSparseBufferAndGetAccessorIndex <T>(this GLTFRoot gltf, int bufferIndex,
int accessorCount,
ArraySegment <T> sparseValues, int[] sparseIndices, int sparseIndicesViewIndex,
GLTFBufferTarget target = GLTFBufferTarget.NONE) where T : struct
{
if (sparseValues.Count == 0)
{
return(-1);
}
var sparseValuesViewIndex = ExtendBufferAndGetViewIndex(gltf, bufferIndex, sparseValues, target);
var accessorIndex = gltf.accessors.Count;
gltf.accessors.Add(new GLTFAccessor
{
byteOffset = 0,
componentType = GetComponentType <T>(),
type = GetAccessorType <T>(),
count = accessorCount,
sparse = new GLTFSparse
{
count = sparseIndices.Length,
indices = new GLTFSparseIndices
{
bufferView = sparseIndicesViewIndex,
componentType = GLTFComponentType.UNSIGNED_INT
},
values = new GLTFSparseValues
{
bufferView = sparseValuesViewIndex,
}
}
});
return(accessorIndex);
}
public GLTFBufferView Extend(IntPtr p, int bytesLength, int stride, GLTFBufferTarget target)
{
var tmp = m_bytes;
// alignment
var padding = m_used % stride == 0 ? 0 : stride - m_used % stride;
if (m_bytes == null || m_used + padding + bytesLength > m_bytes.Length)
{
// recreate buffer
m_bytes = new Byte[m_used + padding + bytesLength];
if (m_used > 0)
{
Buffer.BlockCopy(tmp, 0, m_bytes, 0, m_used);
}
}
if (m_used + padding + bytesLength > m_bytes.Length)
{
throw new ArgumentOutOfRangeException();
}
Marshal.Copy(p, m_bytes, m_used + padding, bytesLength);
var result = new GLTFBufferView
{
buffer = 0,
byteLength = bytesLength,
byteOffset = m_used + padding,
byteStride = stride,
target = target,
};
m_used = m_used + padding + bytesLength;
return(result);
}
public GLTFBufferView Append <T>(ArraySegment <T> segment, GLTFBufferTarget target) where T : struct
{
var view = _storage.Extend(segment, target);
byteLength = _storage.GetBytes().Count;
return(view);
}
public static int ExtendBufferAndGetAccessorIndex <T>(this GLTFRoot gltf, int bufferIndex,
ArraySegment <T> array,
GLTFBufferTarget target = GLTFBufferTarget.NONE) where T : struct
{
if (array.Count == 0)
{
return(-1);
}
var viewIndex = ExtendBufferAndGetViewIndex(gltf, bufferIndex, array, target);
// index buffer's byteStride is unnecessary
gltf.bufferViews[viewIndex].byteStride = 0;
var accessorIndex = gltf.accessors.Count;
gltf.accessors.Add(new GLTFAccessor
{
bufferView = viewIndex,
byteOffset = 0,
componentType = GetComponentType <T>(),
type = GetAccessorType <T>(),
count = array.Count,
});
return(accessorIndex);
}
public GLTFBufferView Extend <T>(ArraySegment <T> array, GLTFBufferTarget target) where T : struct
{
using (var pin = array.ToPin())
{
var elementSize = Marshal.SizeOf(typeof(T));
var view = Extend(pin.Ptr, array.Count * elementSize, elementSize, target);
return(view);
}
}
public static int ExtendSparseBufferAndGetAccessorIndex <T>(this GLTFRoot gltf, int bufferIndex,
int accessorCount,
T[] sparseValues, int[] sparseIndices, int sparseViewIndex,
GLTFBufferTarget target = GLTFBufferTarget.NONE) where T : struct
{
return(ExtendSparseBufferAndGetAccessorIndex(gltf, bufferIndex,
accessorCount,
new ArraySegment <T>(sparseValues), sparseIndices, sparseViewIndex,
target));
}
public static int ExtendBufferAndGetViewIndex <T>(this GLTFRoot gltf, int bufferIndex,
ArraySegment <T> array,
GLTFBufferTarget target = GLTFBufferTarget.NONE) where T : struct
{
if (array.Count == 0)
{
return(-1);
}
var view = gltf.buffers[bufferIndex].Append(array, target);
var viewIndex = gltf.bufferViews.Count;
gltf.bufferViews.Add(view);
return(viewIndex);
}
public GLTFBufferView Extend <T>(ArraySegment <T> array, GLTFBufferTarget target) where T : struct
{
throw new NotImplementedException();
}
public static GLTFBufferView Extend <T>(this IBytesBuffer buffer, T[] array, GLTFBufferTarget target) where T : struct
{
return(buffer.Extend(new ArraySegment <T>(array), target));
}
public GLTFBufferView Append <T>(T[] array, GLTFBufferTarget target) where T : struct
{
return(Append(new ArraySegment <T>(array), target));
}
public static int ExtendBufferAndGetViewIndex <T>(this GLTFRoot gltf, int bufferIndex,
T[] array,
GLTFBufferTarget target = GLTFBufferTarget.NONE) where T : struct
{
return(ExtendBufferAndGetViewIndex(gltf, bufferIndex, new ArraySegment <T>(array), target));
}
