Gaffer Allows you to use the Box node to create reusable tools within your node graph. In this post, we look at how to use Gaffer.ExtensionAlgo to export these so they can be re-used in the same way as Gaffer’s built-in nodes.
Contexts are an essential part of Gaffer. We’re working on some more structured documentation about them. In the mean time, here is a list of common Context Variables set by Gaffer as part of the compute process. Amongst other things, they can be used in expressions or via ${variables} in string plug values.
From 0.55.0.0 onwards, you can now label menu dividers. You can see an examples of this in the Editor Focus menu, which has both a title (in black) and two labelled dividers (dark grey).
To create these, simply add a label to your item when setting "divider" : True:
menu.append( "/Follow Divider",
{ "divider" : True, "label" : "Follow" }
)
For this instalment in our ground-up series about integrating Gaffer into a pipeline, we cover how to change node defaults.
All Gaffer nodes have plugs, whether they are visible in the Graph Editor for easy connection, or in the Node Editor as settings. These plugs have default values defined by the node’s programming. It may be the case however, that these defaults aren’t the most useful values for your use. To help with this, Gaffer allows you to provide your own, “user” defaults.
Continue reading “G4P – part 6 – Node defaults”In this instalment of the Gaffer for Pipeline series of ‘ground up’ posts, we look at adding custom bookmarks to the various Gaffer browsers. We’ll recap the tutorial from the Gaffer docs, introduce dynamic bookmarks and look at Gaffer’s own categories in more detail.
Continue reading “G4P – part 5 – File Browser Bookmarks”Gaffer 0.55.0.0 introduces the NameSwitch node; like a Switch node, but using names instead of indices for switching between the inputs. This post shows an example of the NameSwitch in use, and describes how you might customise its UI to better suit your pipeline.
Continue reading “Customising the NameSwitch node UI”When writing pipeline tools, it’s often useful to know which Gaffer version you are running in. In python, the Gaffer.About module is your friend:
import Gaffer
print( Gaffer.About.versionString() )
print( Gaffer.About.majorVersion(), Gaffer.About.minorVersion() )We also define a (script + ABI) ‘compatibility’ version, that, as we use SemVer – is effectively tied to the milestone + major version:
print( Gaffer.About.compatibilityVersion() )Gaffer’s Box node is a staple building block sharing chunks of node graph (via the Reference system), or quickly building tools via expressions and promoted plugs.
The Gaffer docs have a page covering Box nodes and how to use them. In this post we take a quick look at how to re-create a simple GroundPlane tool made in the UI, using only Gaffer’s python API.
Continue reading “Scripting Box nodes”Like many other applications that calculate data on-demand, Gaffer has a memory cache that can increase performance in UI sessions if you have RAM to spare.
The default size (1GB) is somewhat conservative as to ensure we don’t use up all the resources of more modest machines when Gaffer is used out-the-box. It is easy to increase the limit though, which can bring performance gains in real-world production scenarios.
Continue reading “Gaffer for pipeline – part 3 – Compute cache size”Continuing our bottom-up look at Gaffer from a pipeline perspective, in this instalment we look at the fundamentals of how to Gaffer is configured. We will cover: