[Bf-committers] Compositor nodes-rerouting

Daniel Salazar - 3Developer.com zanqdo at gmail.com
Wed Aug 31 09:57:52 CEST 2011

I like it, i currently use dummy nodes like "add 0" to get this kind
of "extension" nodes for organization


of course your way looks so much better, good thinking :)

Daniel Salazar

On Wed, Aug 31, 2011 at 1:49 AM, j.bakker at atmind.nl <j.bakker at atmind.nl> wrote:
> Hi all,
> I want to discuss this proposal. Many people have requested it, but I want
> to be sure if it is satisfying, or that there are other things that can be
> introduced.
> I have limited the proposal to the Compositor tree, but it could be done
> for other tree's.
> ===== Proposal =====
> This proposal is a UI enhancement on the node editor to allow better
> workflow with large node systems.
> ==== Noodle line ====
> By using MouseClick-SHIFT on a noodle a point will appear. The user can
> positioned this point (Reroute point).
> This point can attach noodles at North, South, East, West
> An arrow will be drawn on noodles between two reroute points
> If noodles reach a certain length, an arrow will be drawn. This way users
> can see the direction of the line.
> Every point can have multiple outputs. Eg you can add multiple points this
> way if you can connect the Combined socket of the renderlayer to other
> nodes in a structured way.
> Current patch is limited to the compositor node tree.
> http://www.youtube.com/watch?v=l_gyLt-TAzk
> http://projects.blender.org/tracker/index.php?func=detail&aid=28443
> ===== Impact =====
> ==== DNA ====
> There is a new NODE_FLAG and SOCK_FLAG called NODE_REROUTE and
> SOCK_REROUTE. telling the UI that it need to draw differently.
> ==== UI ====
> The point is a special node, "RerouteNode". All nodetree will have one. it
> will be in a new submenu named "Helper" in the add node menu. This sub-menu
> will not be visible on screen.
> === Operators ===
> a new operation will be added where the user can click on a line holding a
> certain key and this will add a RoutingNode in that position.
> === drawnode.c ===
> For the RoutingNode a new function is introduced to draw the node.
> When drawing bNodeLink that is connected to a routingnode a different
> algorithm will be used for drawing the bezier.
> If the distance traveled on the x-axis is longer than the y-axis the link
> will be connected to the east or west of the node. If the y-axis is longer
> it will be the north of south.
> When it is connected to the north of source, the bezier will be adjusted to
> draw it correctly.
> When a line will be between two reroute nodes, an arrow will be draw on the
> line. This way the user know where the line is heading to.
> ==== nodes/???_ ====
> All node types will get a RerouteNode. currently only the compositor will
> get one.
> A rerouting node contains one input socket and one output socket and uses
> pass buffer to pass the data to the next node
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