On 2021-04-05 08:13, Kevin Dunphy wrote:
> Attached correct version of test.py **** (Still doesn't work, but uses
> numpy arrays in the scatter plot inputs).
>
> On Monday, 5 April 2021 at 09:11:11 UTC-3 Kevin Dunphy wrote:
>
>
> This isn't quite my problem. I've attached some test scripts that
> show where the error occurs. The only major difference in that in
> one case I am embedding the GL widget into a main window, and in
> another case I am not. I don't think it is a driver issue
> *because* test2.py works without issues.
>
> For context, I am running the following versions:
>
> Python 3.8
> PyQt5 5.15.1
> pyqtgraph 0.12.0
> numpy 1.19.4
>
> On Monday, 5 April 2021 at 00:06:47 UTC-3 Nit wrote:
>
> Hi, you might need to place the place the graphicsview inside
> gridlayout, add GLviewwidget onto the layout
>
> #Create object form GLviewWidget
> self.viewt = gl.GLViewWidget()
> #create grid features
> self.xgrid.rotate(90, 0, 1, 0)
> self.xgrid.translate(-10, 0, 0)
> #add grid item to GLviewWidget object
> self.viewt.addItem(self.xgrid)
>
> #This should solve the issue
> self.layout_parent = QGridLayout(self.graphicsView)
> self.layout_parent.setContentsMargins(20, 20, 20, 20)
> self.layout_parent.addWidget(self.viewt)
>
> Let me know
>
> On Sunday, April 4, 2021 at 6:31:19 AM UTC-7
> [email protected] wrote:
>
> Hello everyone,
>
> I'm fairly new to PyQtGraph, and for the most part I have
> been having tremendous success. I am creating an
> application that does some analysis on objects in 3D
> space, and generates plots based on their geometry.
> Currently my plots are all 2D, with an image view and
> linked axes to show data arising from the underlying model
> geometry, however I was hoping to also include a 3D plot
> *showing* the geometry. Going through the PyQtGraph
> examples, the GlScatterPlotItem looks to be precisely what
> I am looking for.
>
> Oddly enough, the example runs perfectly fine, however
> when I try to implement this into my application I got an
> error. My first instinct was to bring the GlViewWidget
> outside of my GraphicsLayoutWidget, and plot
> independently. This worked.. kind of. I can add a GridItem
> to the GlViewWidget, and that renders fine - I can
> interact with it as I can in the examples. However, upon
> trying to add a GlScatterPlotItem I get the following error:
>
> line 114, in addItem
> self.checkOpenGLVersion('Error while adding item %s to
> GLViewWidget.' % str(item))
>
> line 535, in checkOpenGLVersion
> verString = glGetString(GL_VERSION)
>
> line 415, in __call__
> return self( *args, **named )
>
> line 230, in glCheckError
> raise self._errorClass(
> OpenGL.error.GLError: GLError(
> err = 1282,
> description = b'invalid operation',
> baseOperation = glGetString,
> cArguments = (GL_VERSION,)
> )
>
> What baffles me is that the examples work without issue.
> Some googling lead me to upgrading mesa drivers, however
> that did not seem to fix the issue - Any ideas on what I
> could do to make this work?
>
Probably because in your test.py the MainWindow object is garbage
collected after main() returns?
After fixing it as shown below, it works for me.
from PyQt5 import QtWidgets, uic
import pyqtgraph.opengl as gl
import pyqtgraph as pg
import numpy as np
class MainWindow(QtWidgets.QMainWindow):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
uic.loadUi('test.ui', self)
self.openGLWidget.show()
def main():
m = MainWindow()
grid = gl.GLGridItem()
m.openGLWidget.addItem(grid) # <-- Works, no problem.
pos = np.array([(0, 0, 0), (0, 1, 0)])
size = np.array([10, 10])
scatter_plot = gl.GLScatterPlotItem(pos=pos, size=size)
m.openGLWidget.addItem(scatter_plot) # <-- Throws error
return m
if __name__ == '__main__':
app = pg.mkQApp()
m = main()
m.show()
pg.mkQApp().exec_()
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