/// <summary>
/// <para>Creates a vertex buffer that will map an array of float or vector primitives to a specified Vertex Usage and index</para>
/// </summary>
/// <param name="data"></param>
/// <param name="elementUsage"></param>
/// <param name="index"></param>
/// <returns></returns>
public static Vertices <VertexType> CreateSingleElementVertices(VertexType[] data, VertexElementUsage elementUsage, int index)
{
if (typeof(float) != typeof(VertexType) &&
typeof(Vector2) != typeof(VertexType) &&
typeof(Vector3) != typeof(VertexType) &&
typeof(Vector4) != typeof(VertexType) &&
typeof(Microsoft.Xna.Framework.Graphics.PackedVector.HalfVector2) != typeof(VertexType) &&
typeof(Microsoft.Xna.Framework.Graphics.PackedVector.HalfVector4) != typeof(VertexType))
{
throw new ArgumentException("Only float and vector types are supported for single element vertex buffers");
}
if (data == null)
{
throw new ArgumentNullException();
}
if (index >= 16 || index < 0)
{
throw new ArgumentException("index");
}
VertexElementFormat format = VertexDeclarationBuilder.DetermineFormat(typeof(VertexType));
VertexElement[] elements = new VertexElement[] { new VertexElement(0, 0, format, VertexElementMethod.Default, elementUsage, (byte)index) };
int stride = VertexElementAttribute.CalculateVertexStride(elements);
return(new Vertices <VertexType>(data, elements, stride));
}
/// <summary>
/// [NOT VALIDATED] Use with caution. No validation is performed by this method. Creates a vertex buffer from a raw data array, using a user specified <see cref="VertexElement"/> array.
/// </summary>
/// <param name="data"></param>
/// <param name="elements"></param>
/// <returns></returns>
/// <remarks>This method is only here to get around some limitations of the XNA content pipeline</remarks>
public static Vertices <VertexType> CreateRawDataVertices(VertexType[] data, VertexElement[] elements)
{
if (typeof(byte) != typeof(VertexType))
{
throw new ArgumentException("Only byte[] raw vertices are supported at this time");
}
if (data == null || elements == null)
{
throw new ArgumentNullException();
}
if (elements.Length == 0)
{
throw new ArgumentException();
}
int stride = VertexElementAttribute.CalculateVertexStride(elements);
return(new Vertices <VertexType>(data, elements, stride));
}