A while ago I made some noise about doing some work on contouring. Well,
I ignored it for a while but it has come up again, and I think I need to
understand how ShadowTypes work a bit more. I've read the DataRenderer
tutorial, which seems to be a kind if guide to the class heirarchy, but
is a bit hand-wavy when it comes to the actual changes one has to make
in order to change the behaviour of things.
Looking around, it seemed like if I wanted to do my own contouring, the
steps I would need to follow are :
1.) Create a custom DataRenderer, whose basic job is to return custom
ShadowTypes when they are asked for.
2.) Extend ShadowType and override the methods that I care about
However, I'm not sure how the innards of the ShadowType class really
hang together. What I want to do is (I think) change the MakeContour
method in order to change the way contouring works. (Just for argument's
sake, let's pretend I can do that).
But I don't know who calls this method or why.
I'd really like to understand the execution flow.
Also, I don't know to what extent the ShadowType classes are part of an
interface - i.e. what methods are relied upon by other VisAD classes,
which ones are part of the ShadowType structure, which ones are just
Maybe I'm being dense, but it seems like a dense topic, so hopefully
that's okay :)