public VertexAttribute Add(VertexAttribute attribute)
{
attribute.Offset = Stride;
Stride += attribute.Stride();
_attributes.Add(attribute);
return(attribute);
}
public VertexAttribute GetAttribute(VertexUsage usage, int index = 0)
{
VertexAttribute attribute = _attributes.FirstOrDefault(a => a.Usage == usage && a.Index == index);
if (attribute == null)
{
throw new InvalidOperationException("VertexAttrubute not found");
}
return(attribute);
}
public AttributeBinding AddBinding(
int index,
VertexUsage usage,
int usageIndex = 0)
{
VertexAttribute v = _vertexBuffer.VertexFormat.GetAttribute(usage, usageIndex);
AttributeBinding binding = new AttributeBinding(index, v.Dimension, v.Type, v.Normalized, _vertexBuffer.VertexFormat.Stride, v.Offset);
_bindings.Add(binding);
_dirty = true;
return(binding);
}
public VertexAttribute Add(VertexUsage usage,
VertexAttribPointerType type,
int index,
int dimension,
int offset,
bool normalized)
{
VertexAttribute attribute = new VertexAttribute()
{
Usage = usage, Type = type, Index = index, Dimension = dimension, Offset = offset, Normalized = normalized
};
Stride += attribute.Stride();
_attributes.Add(attribute);
return(attribute);
}