/// <summary>
/// Loads a VertexLayout based off of information in a vertex XML element.
/// </summary>
/// <param name="vertexElement">The vertex element to create the layout from.</param>
/// <returns>The VertexLayout that was created.</returns>
private static VertexLayout LoadLayout(XElement vertexElement)
{
// Vertex tags have the format:
// <vertex type="(type index)" name="(vertex name)">(elements)</vertex>
int type = XMLUtil.GetNumericAttribute(vertexElement, "type");
string name = XMLUtil.GetStringAttribute(vertexElement, "name");
VertexLayout result = new VertexLayout(type, name);
result.AddElements(LoadLayoutElements(vertexElement));
return result;
}
/// <summary>
/// Reads vertices from a vertex buffer.
/// </summary>
/// <param name="reader">The stream to read from.</param>
/// <param name="layout">The layout of each vertex to read.</param>
/// <param name="count">The number of vertices to read.</param>
/// <param name="boundingBox">The bounding box to transform vertices with. Can be null.</param>
/// <param name="processor">The IVertexProcessor to send read vertices to. Can be null.</param>
public static void ReadVertices(IReader reader, VertexLayout layout, int count, IModelBoundingBox boundingBox, IVertexProcessor processor)
{
for (int i = 0; i < count; i++)
{
long vertexStartPos = reader.Position;
if (processor != null)
processor.BeginVertex();
foreach (VertexElementLayout element in layout.Elements)
{
if (element.Stream == 0) // Not sure how multistream vertices work yet
{
reader.SeekTo(vertexStartPos + element.Offset);
ReadElement(reader, element, boundingBox, processor);
}
}
if (processor != null)
processor.EndVertex();
}
}
