A generalization of the modal node linking operator (for dragging from socket to socket).

This operator still had some built-in assumptions about the connectivity of input/output sockets (1-to-n in all current node systems). For future node systems (e.g. flow-based particles) and for general customizable nodes the operator is now fully symmetric and supports all kinds of connectivity limits (1:1, 1:n, m:1, m:n).

The operator data can also store a list of node links as opposed to a single link now, so that multiple links can be redirected at once. Holding the CTRL key when clicking a socket, all links from/to that socket are detached and can be moved to a different socket. This is useful for quickly appending a node without moving every individual link.

1 files changed, 5 insertions, 3 deletions

diff --git a/source/blender/editors/space_node/node_intern.h b/source/blender/editors/space_node/node_intern.h
index 17078443987..802c471c7aa 100644
--- a/source/blender/editors/space_node/node_intern.h
+++ b/source/blender/editors/space_node/node_intern.h
@@ -52,9 +52,11 @@ typedef struct bNodeLinkDrag
 {
 	struct bNodeLinkDrag *next, *prev;
 	
-	struct bNode *node;
-	struct bNodeSocket *sock;
-	struct bNodeLink *link;
+	/* List of links dragged by the operator.
+	 * Note: This is a list of LinkData structs on top of the actual bNodeLinks.
+	 * This way the links can be added to the node tree while being stored in this list.
+	 */
+	ListBase links;
 	int in_out;
 } bNodeLinkDrag;