3D Graphics#

PyQtGraph uses OpenGL to provide a 3D scenegraph system. This system is functional but still early in development. Current capabilities include:

  • 3D view widget with zoom/rotate controls (mouse drag and wheel)

  • Scenegraph allowing items to be added/removed from scene with per-item transformations and parent/child relationships.

  • Triangular meshes

  • Basic mesh computation functions: isosurfaces, per-vertex normals

  • Volumetric rendering item

  • Grid/axis items

See the API Reference and the Volumetric (GLVolumeItem.py) and Isosurface (GLMeshItem.py) examples for more information.

Basic usage example:

## build a QApplication before building other widgets
import pyqtgraph as pg

## make a widget for displaying 3D objects
import pyqtgraph.opengl as gl
view = gl.GLViewWidget()

## create three grids, add each to the view
xgrid = gl.GLGridItem()
ygrid = gl.GLGridItem()
zgrid = gl.GLGridItem()

## rotate x and y grids to face the correct direction
xgrid.rotate(90, 0, 1, 0)
ygrid.rotate(90, 1, 0, 0)

## scale each grid differently
xgrid.scale(0.2, 0.1, 0.1)
ygrid.scale(0.2, 0.1, 0.1)
zgrid.scale(0.1, 0.2, 0.1)