internal VertexElement(IntPtr offset, VertexElementType type, int count, VertexElementRole role)
{
this.offset = offset;
this.type = type;
this.count = count;
this.role = role;
}
internal VertexElement(IntPtr offset, VertexElementType type, int count, VertexElementRole role)
{
this.offset = offset;
this.type = type;
this.count = count;
this.role = role;
}
private VertexDeclaration(Type dataType, int typeIndex)
{
TypeInfo dataTypeInfo = dataType.GetTypeInfo();
if (dataTypeInfo.IsClass)
{
throw new InvalidOperationException("Vertex formats need to be structs. Classes are not supported.");
}
FieldInfo[] fields = dataTypeInfo.DeclaredFieldsDeep().Where(m => !m.IsStatic).ToArray();
this.dataType = dataType;
this.typeIndex = typeIndex;
this.size = Marshal.SizeOf(dataType);
this.elements = new VertexElement[fields.Length];
for (int i = 0; i < fields.Length; i++)
{
VertexElementRole role = VertexElementRole.Unknown;
VertexElementType type = VertexElementType.Unknown;
int count = 0;
VertexElementAttribute attrib = fields[i].GetAttributesCached <VertexElementAttribute>().FirstOrDefault();
if (attrib != null)
{
role = attrib.Role;
type = attrib.Type;
count = attrib.Count;
}
if (type == VertexElementType.Unknown || count == 0)
{
DetermineElement(fields[i].FieldType, out type, out count);
}
if (type == VertexElementType.Unknown || count == 0)
{
throw new InvalidOperationException(string.Format("Unable to determine type of field {2}, vertex format {1}. Add a {0} to specify it explicitly",
typeof(VertexElementAttribute).Name,
dataType.Name,
fields[i].Name));
}
this.elements[i] = new VertexElement(
Marshal.OffsetOf(dataType, fields[i].Name),
type,
count,
role);
}
// Add this declaration to the static by-TypeIndex lookup
while (delcarationByIndex.Count <= this.typeIndex)
{
delcarationByIndex.Add(null);
}
delcarationByIndex[this.typeIndex] = this;
}
public VertexElementAttribute(VertexElementType type, int count, VertexElementRole role = VertexElementRole.Unknown)
{
this.type = type;
this.count = count;
this.role = role;
}
public VertexElementAttribute(VertexElementRole role) : this(VertexElementType.Unknown, 0, role)
{
}
public VertexElementAttribute(VertexElementType type, int count, VertexElementRole role = VertexElementRole.Unknown)
{
this.type = type;
this.count = count;
this.role = role;
}
public VertexElementAttribute(VertexElementRole role) : this(VertexElementType.Unknown, 0, role) { }
