output figure only in 1/4 of the whole window

[Xiaoxue Zhang]

Dear all,

Thank you so much for your time.

I have one problem when plotting 3D figure using PyQtGraph. The result only is in 1/4 of the whole window, shown as below.

Anyone can help me to address this problem?

Thanks. Look forward to any reply.

Best Regards,

Xiaoxue

[Kenneth Lyons]

Hi Xiaoxue, it's hard to tell if this is a bug in pyqtgraph or possibly something in your application code. Could you provide a bit more information?

- Python version and how it was installed (conda, python.org, system package)

- PyQt4/PySide/PyQt5/PySide2 and how it was installed

- pyqtgraph version and how it was installed (if different from above)

It would also be very helpful to have a minimal script that reproduces the problem. Do any of the 3D examples in pyqtgraph have a similar problem for you?

[Xiaoxue Zhang]

On Monday, June 17, 2019 at 9:23:21 PM UTC+8, Xiaoxue Zhang wrote:

Hi, Kenneth,

Thanks so much for your kind reply.

My python version is Python 3.7.2, I installed it via via Homebrew. 

PyQt5 is installed for PyQtGraph. I just install the PyQtGraph by this command:  pip install pyqtgraph. I also installed OpenGL for 3D display.

Here, I will use a simple example to show the problem.

code:

from pyqtgraph.Qt import QtCore, QtGui

import pyqtgraph.opengl as gl

import numpy as np

from math import *

import time

app = QtGui.QApplication([])

w = gl.GLViewWidget()

w.opts['distance'] = 200

w.show()

w.setWindowTitle('Quadcopter Simulation')

## create three grids, add each to the view

xgrid = gl.GLGridItem()

ygrid = gl.GLGridItem()

zgrid = gl.GLGridItem()

w.addItem(xgrid)

w.addItem(ygrid)

w.addItem(zgrid)

## rotate x and y grids to face the correct direction

xgrid.rotate(90, 0, 1, 0)

ygrid.rotate(90, 1, 0, 0)

xgrid.scale(1.0, 1.0, 1.0)

ygrid.scale(1.0, 1.0, 1.0)

zgrid.scale(1.0, 1.0, 1.0)

md = gl.MeshData.sphere(rows=10, cols=10, radius=5)

body = gl.GLMeshItem(meshdata=md, smooth=False, drawFaces=True, drawEdges=True, edgeColor=(1,0,0,0), color=(1,0,0,0) )

w.addItem(body)

x = np.zeros((12,))

w.show()

app.processEvents()

time.sleep(0.01)

QtGui.QApplication.instance().exec_()

I just plot a sphere on a 3D figure. The output figure just occupy 1/4 of the whole window, as shown below.

Thanks for your help. Look forward to your kind reply.

Best regards,

Xiaoxue

[Xiaoxue Zhang]

I just plot a sphere on a 3D figure. The output figure just occupy 1/4 of the whole window, as shown below. No matter how I zoom in or out, the figure just show in the left bottom corner of the figure, and will not be full in the window.

Thanks for your help. Look forward to your kind reply.

Best regards,

Xiaoxue

On Sunday, June 16, 2019 at 1:35:05 AM UTC+8, Kenneth Lyons wrote:

[Kenneth Lyons]

I would guess based on the use of Homebrew you're on OSX and this might have something to do with retina display. I think there were some GLView issues in that case that were fixed after the most recent release (0.10.0). Could you try installing from the latest develop branch on GitHub and see if the issue persists: https://github.com/pyqtgraph/pyqtgraph/blob/develop/README.md#installation-methods

If you're still having trouble, please post a new issue on the pyqtgraph GitHub.

[Xiaoxue Zhang]

Many many thanks. The latest version of PyQtGraph works.

Thanks so much for your help.

Best regards,

Xiaoxue