Blender Git Loki

New node "Curve Path" for reading interpolated curve data.

This introduces an improved way of handling ID relations inside the
node tree. Instead of storing simple indices to an object array,
the nodes now generate a 'key' (currently just ID name + lib name).
At eval time this key is then looked up from a hash table in globals,
to produce the actual pointer to the object.

Currently the node will not work, because the curve is not yet registered
in the globals map. This should happen in conjunction with depsgraph
updates.

Change method of hit-counting

Instead of de-duplicating on each ray-hit addition,
sort and count non duplicates.

Merge branch 'master' into object_nodes

EvalData is now deprecated and unused, removed it.

Check when we can't find paths - was asserting

For very scrambled degenerate geometry where this error is unavoidable.

Removed global data from the compile process, this should only be needed for eval.

Global data is used primarily for blend_data pointers (objects primarily).
These should not be stored directly inside the function instructions,
but should be stored by a key (hash value) and resolved at eval time.

Merge branch 'master' into bmesh-boolean-experiment

A number of actual value nodes for simple input constants in the UI.

Cycles: fix memory leaks.

They were all pretty obvious...

Merge branch 'master' into bmesh-boolean-experiment

Merge branch 'master' into openvdb

Moved debugging code output node graph into a utility file.

Represent local output behavior in the graphviz debug by showing additional links.

Fix for graph debug: input arguments refer to outputs, can just use the ARG nodes themselves.

Partial revert: need to allow pointer/mesh value nodes and constants.

These are generated automatically as terminators in pass node chains.
No pointer/mesh values will be stored in instructions though, the
sockets are just dummies to ensure a consistent value node signature.

Removed 'Value' node types for pointer and mesh data, and disallow hardcoding them as constants.

Pointers in the instruction lists are bound to be invalid most of the time. They should only be
supplied externally via graph input arguments.

Note that opcodes still exist for POINTER/MESH, but these always store a NULL/empty DM
default value, rather than reading from instructions. They are only used by the code generator
as fallbacks if such sockets are not connected.

'Value' nodes are actually regular function nodes, not pass-type nodes.

Merge branch 'master' into bmesh-boolean-experiment

Removed unused code.

Merge branch 'master' into bmesh-boolean-experiment