Class MeshAccessor

Source/Engine/Graphics/Models/MeshAccessor.cs:12–1028

General purpose utility for accessing mesh data (both read and write).

    /// General purpose utility for accessing mesh data (both read and write).
    /// </summary>
    public class MeshAccessor
    {
        /// <summary>
        /// Mesh data stream.
        /// </summary>
        public unsafe ref struct Stream
        {
            private Span<byte> _data;
            private PixelFormat _format;
            private int _stride, _count;
            private readonly PixelFormatSampler _sampler;

            internal Stream(Span<byte> data, PixelFormat format, int stride, int count)
            {
                _data = data;
                _stride = stride;
                _count = count;
                if (PixelFormatSampler.Get(format, out _sampler))
                {
                    _format = format;
                }
                else if (format != PixelFormat.Unknown)
                {
                    Debug.LogError($"Unsupported pixel format '{format}' to sample vertex attribute.");
                }
            }

            /// <summary>
            /// Gets the raw data block.
            /// </summary>
            public Span<byte> Data => _data;

            /// <summary>
            /// Gets the format of the data.
            /// </summary>
            public PixelFormat Format => _format;

            /// <summary>
            /// Gets the stride (in bytes) of the data.
            /// </summary>
            public int Stride => _stride;

            /// <summary>
            /// Gets the count of the items in the stride.
            /// </summary>
            public int Count => _count;

            /// <summary>
            /// Returns true if stream is valid.
            /// </summary>
            public bool IsValid => _format != PixelFormat.Unknown;

            /// <summary>
            /// Checks if the stream can use <seealso cref="SetLinear"/> via a single memory copy.
            /// </summary>
            /// <param name="expectedFormat">Source data format.</param>
            /// <returns>True if stream is linear and format matches expected input data.</returns>
            public bool IsLinear(PixelFormat expectedFormat)