internal static void VerifyParametersDrawUser <T>(PrimitiveType primitiveType, Shader shader, VertexDeclaration vertexDeclaration, T[] vertexData, int startVertex, int verticesCount) where T : struct
{
shader.VerifyNotDisposed();
int num = Utilities.SizeOf <T>();
if (shader == null)
{
throw new ArgumentNullException("shader");
}
if (vertexDeclaration == null)
{
throw new ArgumentNullException("vertexDeclaration");
}
if (vertexData == null)
{
throw new ArgumentNullException("vertexData");
}
if (vertexDeclaration.VertexStride / num * num != vertexDeclaration.VertexStride)
{
throw new InvalidOperationException($"Vertex is not an integer multiple of array element, vertex stride is {vertexDeclaration.VertexStride}, array element is {num}.");
}
if (startVertex < 0 || verticesCount < 0 || startVertex + verticesCount > vertexData.Length)
{
throw new ArgumentException("Vertices range is out of bounds.");
}
}
