public int AddBufferView(glTFBufferView view)
{
var index = bufferViews.Count;
bufferViews.Add(view);
return(index);
}
public glTFBufferView Extend(IntPtr p, int bytesLength, int stride, glBufferTarget 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);
}
ArraySegment <Byte> GetBytes(IStorage io, int size, int byteOffset, glTFBufferView view)
{
var segment = io.Get(buffers[view.buffer].uri);
var bytes = new ArraySegment <Byte>(segment.Array, segment.Offset + view.byteOffset + byteOffset, size);
return(bytes);
}
public ArraySegment <byte> GetBufferBytes(UniGLTF.glTFBufferView bufferView)
{
if (!bufferView.buffer.TryGetValidIndex(Gltf.buffers.Count, out int bufferViewBufferIndex))
{
throw new Exception();
}
return(GetBufferBytes(Gltf.buffers[bufferViewBufferIndex]));
}
T[] GetAttrib <T>(int count, int byteOffset, glTFBufferView view) where T : struct
{
var attrib = new T[count];
var segment = buffers[view.buffer].GetBytes();
var bytes = new ArraySegment <Byte>(segment.Array, segment.Offset + view.byteOffset + byteOffset, count * view.byteStride);
bytes.MarshalCopyTo(attrib);
return(attrib);
}
T[] GetAttrib <T>(IStorage io, int count, int byteOffset, glTFBufferView view) where T : struct
{
var attrib = new T[count];
//
var bytes = GetBytes(io, count, byteOffset, view);
bytes.MarshalCoyTo(attrib);
return(attrib);
}
T[] GetAttrib <T>(glTFAccessor accessor, glTFBufferView view) where T : struct
{
var attrib = new T[accessor.count];
//
var segment = buffers[view.buffer].Storage.GetBytes();
var bytes = new ArraySegment <Byte>(segment.Array, segment.Offset + view.byteOffset + accessor.byteOffset, accessor.count * view.byteStride);
bytes.MarshalCoyTo(attrib);
return(attrib);
}
public static void Serialize_gltf_bufferViews_ITEM(JsonFormatter f, glTFBufferView value)
{
f.BeginMap();
if (value.buffer >= 0)
{
f.Key("buffer");
f.Value(value.buffer);
}
if (value.byteOffset >= 0)
{
f.Key("byteOffset");
f.Value(value.byteOffset);
}
if (value.byteLength >= 1)
{
f.Key("byteLength");
f.Value(value.byteLength);
}
if (value.byteStride >= 4 && false)
{
f.Key("byteStride");
f.Value(value.byteStride);
}
if (true && value.target != 0)
{
f.Key("target");
f.Value((int)value.target);
}
if (value.extensions != null)
{
f.Key("extensions");
value.extensions.Serialize(f);
}
if (value.extras != null)
{
f.Key("extras");
value.extras.Serialize(f);
}
if (!string.IsNullOrEmpty(value.name))
{
f.Key("name");
f.Value(value.name);
}
f.EndMap();
}
IEnumerable <int> _GetIndices(glTFBufferView view, int count, int byteOffset, glComponentType componentType)
{
switch (componentType)
{
case glComponentType.UNSIGNED_BYTE:
{
return(GetAttrib <Byte>(count, byteOffset, view).Select(x => (int)(x)));
}
case glComponentType.UNSIGNED_SHORT:
{
return(GetAttrib <UInt16>(count, byteOffset, view).Select(x => (int)(x)));
}
case glComponentType.UNSIGNED_INT:
{
return(GetAttrib <UInt32>(count, byteOffset, view).Select(x => (int)(x)));
}
}
throw new NotImplementedException("GetIndices: unknown componenttype: " + componentType);
}
T[] GetAttrib <T>(glTFAccessor accessor, glTFBufferView view) where T : struct
{
return(GetAttrib <T>(accessor.count, accessor.byteOffset, view));
}
static T[] GetAttrib <T>(this glTF self, glTFAccessor accessor, glTFBufferView view) where T : struct
{
return(self.GetAttrib <T>(accessor.count, accessor.byteOffset, view));
}
ArraySegment <Byte> GetBytes(IStorage io, glTFAccessor accessor, glTFBufferView view)
{
return(GetBytes(io, accessor.ElementSize * accessor.count, accessor.byteOffset, view));
}
