/// <summary>
/// Get an element from this mapped BufferObject.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used for mapping this BufferObject.
/// </param>
/// <param name="offset">
/// A <see cref="Int64"/> that specify the offset applied to the mapped BufferObject to get the stored
/// value, in bytes.
/// </param>
/// <returns>
/// It returns a <see cref="Vertex3f"/>, read from the mapped BufferObject at the specified offset.
/// </returns>
/// <exception cref="InvalidOperationException">
/// Exception thrown if this BufferObject is not mapped (<see cref="IsMapped"/>).
/// </exception>
public Vertex3f Get(GraphicsContext ctx, UInt64 offset)
{
unsafe
{
byte * bufferPtr = (byte *)MappedBuffer.ToPointer();
Vertex3f *bufferItemPtr = (Vertex3f *)(bufferPtr + offset);
return(bufferItemPtr[0]);
}
}
/// <summary>
/// Set an element to this mapped BufferObject.
/// </summary>
/// <param name="value">
/// A <see cref="Vertex3f"/> that specify the mapped BufferObject element.
/// </param>
/// <param name="offset">
/// A <see cref="UInt64"/> that specify the offset applied to the mapped BufferObject where <paramref name="value"/>
/// is stored. This value is expressed in basic machine units (bytes).
/// </param>
/// <exception cref="InvalidOperationException">
/// Exception thrown if this BufferObject is not mapped (<see cref="IsMapped"/>).
/// </exception>
public void Set(Vertex3f value, UInt64 offset)
{
if (IsMapped == false)
{
throw new InvalidOperationException("not mapped");
}
unsafe
{
byte * bufferPtr = (byte *)MappedBuffer.ToPointer();
Vertex3f *bufferItemPtr = (Vertex3f *)(bufferPtr + offset);
bufferItemPtr[0] = value;
}
}
