SD Graph current position in Substance Designer.

Hello @edward_woopie,

The QtForPython API (PySide2) may be used to acquire the graph scene coordinates corresponding to the center of the Graph View viewport, although we do not recommend this approach.

Here is a sample script to create a node at the center of the current view:

import sd
from sd.api import sdbasetypes
from PySide2 import QtWidgets

app = sd.getContext().getSDApplication()
ui_mgr = app.getQtForPythonUIMgr()

graph = ui_mgr.getCurrentGraph()
nodes = graph.getNodes()

main_window = ui_mgr.getMainWindow()

# Get Graph View dock
areaB_0 = main_window.findChild(QtWidgets.QDockWidget, "areaB_0")

# Find graph scene in dock children
for item in areaB_0.findChildren(QtWidgets.QGraphicsView):
	if item.isVisible():
		graph_scene = item
		
# Transformation matrix for current view of graph scene in viewport
transform = graph_scene.viewportTransform()

# QRect object for viewport
rect = graph_scene.rect()

# The center of the graph view is the position of the graph scene at the top left 
# corner of the viewport, plus half the viewport's width and height, both adjusted
# to the current scale or zoom level
#
# m11 = graph scene scale, or zoom level
# m31 = x translation, or x position of graph scene at top left corner of viewport
# m32 = y translation, or y position of graph scene at top left corner of viewport

view_center_position_x = (-transform.m31() / transform.m11()) + (rect.width() / transform.m11() / 2)

view_center_position_y = (-transform.m32() / transform.m11()) + (rect.height() / transform.m11() / 2)

# Save the position as a float2 value
new_position = sdbasetypes.float2(view_center_position_x, view_center_position_y)

# Create new node
node = graph.newNode('sbs::compositing::blur')

# Place new node at center of graph view
node.setPosition(new_position)

IMPORTANT: Please note using the QtForPython API to work with objects deep in the software that are not exposed in our Python API is not supported nor recommended. Also, any change we make in Designer in the future can break this script.

Best regards.