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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 :doc:`API Reference <../api_reference/3dgraphics/index>` 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
pg.mkQApp()
## make a widget for displaying 3D objects
import pyqtgraph.opengl as gl
view = gl.GLViewWidget()
view.show()
## create three grids, add each to the view
xgrid = gl.GLGridItem()
ygrid = gl.GLGridItem()
zgrid = gl.GLGridItem()
view.addItem(xgrid)
view.addItem(ygrid)
view.addItem(zgrid)
## 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)
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