/// <summary>
/// Creates a buffer object of type T.
/// </summary>
/// <param name="data">Specifies a pointer to data that will be copied into the data store for initialization.</param>
/// <param name="target">Specifies the target buffer object.</param>
/// <param name="hint">Specifies the expected usage of the data store.</param>
public VBO(T[] data, BufferTarget target = BufferTarget.ArrayBuffer, BufferUsageHint hint = BufferUsageHint.StaticDraw)
{
vboID = GlUtility.CreateVBO <T>(BufferTarget = target, data, hint);
Size = (data is int[] || data is float[] ? 1 : (data is Vector2[] ? 2 : (data is Vector3[] ? 3 : (data is Vector4[] ? 4 : 0))));
PointerType = (data is int[] ? VertexAttribPointerType.Int : VertexAttribPointerType.Float);
Count = data.Length;
}
/// <summary>
/// Creates a buffer object of type T with a specified length.
/// This allows the array T[] to be larger than the actual size necessary to buffer.
/// Useful for reusing resources and avoiding unnecessary GC action.
/// </summary>
/// <param name="data">An array of data of type T (which must be a struct) that will be buffered to the GPU.</param>
/// <param name="position"></param>
/// <param name="length">The length of the valid data in the data array.</param>
/// <param name="target">Specifies the target buffer object.</param>
/// <param name="hint">Specifies the expected usage of the data store.</param>
public VBO(T[] data, int position, int length, BufferTarget target = BufferTarget.ArrayBuffer, BufferUsageHint hint = BufferUsageHint.StaticDraw)
{
length = Math.Max(0, Math.Min(length, data.Length));
vboID = GlUtility.CreateVBO <T>(BufferTarget = target, data, hint, position, length);
this.Size = (data is int[] || data is float[] ? 1 : (data is Vector2[] ? 2 : (data is Vector3[] ? 3 : (data is Vector4[] ? 4 : 0))));
this.PointerType = (data is int[] ? VertexAttribPointerType.Int : VertexAttribPointerType.Float);
this.Count = length;
}
