Cannot run any of the 3D examples

[Michael Heitmeier]

All other examples work but none of the 3D examples, which looks like an OpenGL issue. Trying to narrow down the problem I ran only the first example of the  provided 3D Graphics/Scatter Plot example ("First example is a set of points with pxMode=False") and the preceeding code as well of course. This in a Jupyter notebook on a Raspberry Pi 3.

The output window gets painted but dies half way, the error being

---------------------------------------------------------------------------

GLError                                   Traceback (most recent call last)

/home/pi/.local/lib/python3.7/site-packages/pyqtgraph/opengl/GLViewWidget.py in addItem(self, item)

     59             try:

---> 60                 item.initializeGL()

     61             except:

/home/pi/.local/lib/python3.7/site-packages/pyqtgraph/opengl/items/GLScatterPlotItem.py in initializeGL(self)

     74         glActiveTexture(GL_TEXTURE0)

---> 75         glEnable(GL_TEXTURE_2D)

     76         glBindTexture(GL_TEXTURE_2D, self.pointTexture)

/home/pi/.local/lib/python3.7/site-packages/OpenGL/platform/baseplatform.py in __call__(self, *args, **named)

    414         if self.load():

--> 415             return self( *args, **named )

    416         else:

/home/pi/.local/lib/python3.7/site-packages/OpenGL/error.py in glCheckError(self, result, baseOperation, cArguments, *args)

    233                         cArguments = cArguments,

--> 234                         baseOperation = baseOperation,

    235                     )

GLError: GLError(

err = 1280,

description = b'invalid enumerant',

baseOperation = glEnable,

cArguments = (GL_TEXTURE_2D,)

)

During handling of the above exception, another exception occurred:

ValueError                                Traceback (most recent call last)

<ipython-input-2-591eade3bea2> in <module>()

     44 sp1 = gl.GLScatterPlotItem(pos=pos, size=size, color=color, pxMode=False)

     45 sp1.translate(5,5,0)

---> 46 w.addItem(sp1)

/home/pi/.local/lib/python3.7/site-packages/pyqtgraph/opengl/GLViewWidget.py in addItem(self, item)

     60                 item.initializeGL()

     61             except:

---> 62                 self.checkOpenGLVersion('Error while adding item %s to GLViewWidget.' % str(item))

     63 

     64         item._setView(self)

/home/pi/.local/lib/python3.7/site-packages/pyqtgraph/opengl/GLViewWidget.py in checkOpenGLVersion(self, msg)

    428         ## Only to be called from within exception handler.

    429         ver = glGetString(GL_VERSION).split()[0]

--> 430         if int(ver.split(b'.')[0]) < 2:

    431             from .. import debug

    432             debug.printExc()

ValueError: invalid literal for int() with base 10: b'OpenGL'

--------------------------------------------

In the hope that it helps, the output of

import pyqtgraph as pg

pg.systemInfo()

import pyqtgraph.opengl.glInfo

is:

sys.platform: linux

sys.version: 3.7.3 (default, Jul 25 2020, 13:03:44) 

[GCC 8.3.0]

qt bindings: PyQt5 5.11.3 Qt 5.11.3

pyqtgraph: 0.11.0; None

config:

{'antialias': False,

 'background': 'k',

 'crashWarning': False,

 'editorCommand': None,

 'enableExperimental': False,

 'exitCleanup': True,

 'foreground': 'd',

 'imageAxisOrder': 'col-major',

 'leftButtonPan': True,

 'useOpenGL': False,

 'useWeave': False,

 'weaveDebug': False}

GL version:OpenGL ES 3.1 Mesa 19.3.2

MAX_TEXTURE_SIZE: 8192

MAX_3D_TEXTURE_SIZE: 2048

Extensions: GL_EXT_blend_minmax

GL_EXT_multi_draw_arrays

GL_EXT_texture_compression_s3tc

GL_EXT_texture_compression_dxt1

GL_EXT_texture_compression_rgtc

GL_EXT_texture_format_BGRA8888

GL_OES_compressed_ETC1_RGB8_texture

GL_OES_depth24

GL_OES_element_index_uint

GL_OES_fbo_render_mipmap

GL_OES_mapbuffer

GL_OES_rgb8_rgba8

GL_OES_standard_derivatives

GL_OES_stencil8

GL_OES_texture_3D

GL_OES_texture_float

GL_OES_texture_float_linear

GL_OES_texture_half_float

GL_OES_texture_half_float_linear

GL_OES_texture_npot

GL_OES_vertex_half_float

GL_EXT_texture_sRGB_decode

GL_OES_EGL_image

GL_OES_depth_texture

GL_OES_packed_depth_stencil

GL_EXT_texture_type_2_10_10_10_REV

GL_NV_conditional_render

GL_OES_get_program_binary

GL_APPLE_texture_max_level

GL_EXT_discard_framebuffer

GL_EXT_read_format_bgra

GL_EXT_frag_depth

GL_NV_fbo_color_attachments

GL_OES_EGL_image_external

GL_OES_EGL_sync

GL_OES_vertex_array_object

GL_ANGLE_texture_compression_dxt3

GL_ANGLE_texture_compression_dxt5

GL_EXT_occlusion_query_boolean

GL_EXT_texture_rg

GL_EXT_unpack_subimage

GL_NV_draw_buffers

GL_NV_read_buffer

GL_NV_read_depth

GL_NV_read_depth_stencil

GL_NV_read_stencil

GL_EXT_draw_buffers

GL_EXT_map_buffer_range

GL_KHR_debug

GL_KHR_texture_compression_astc_ldr

GL_OES_depth_texture_cube_map

GL_OES_required_internalformat

GL_OES_surfaceless_context

GL_EXT_color_buffer_float

GL_EXT_sRGB_write_control

GL_EXT_separate_shader_objects

GL_EXT_shader_implicit_conversions

GL_EXT_shader_integer_mix

GL_EXT_base_instance

GL_EXT_compressed_ETC1_RGB8_sub_texture

GL_EXT_copy_image

GL_EXT_draw_buffers_indexed

GL_EXT_draw_elements_base_vertex

GL_EXT_polygon_offset_clamp

GL_EXT_render_snorm

GL_EXT_shader_io_blocks

GL_EXT_texture_border_clamp

GL_EXT_texture_buffer

GL_EXT_texture_norm16

GL_EXT_texture_view

GL_KHR_context_flush_control

GL_NV_image_formats

GL_OES_copy_image

GL_OES_draw_buffers_indexed

GL_OES_draw_elements_base_vertex

GL_OES_shader_io_blocks

GL_OES_texture_border_clamp

GL_OES_texture_buffer

GL_OES_texture_stencil8

GL_OES_texture_storage_multisample_2d_array

GL_OES_texture_view

GL_EXT_blend_func_extended

GL_EXT_buffer_storage

GL_EXT_float_blend

GL_KHR_no_error

GL_KHR_texture_compression_astc_sliced_3d

GL_OES_EGL_image_external_essl3

GL_OES_shader_image_atomic

GL_EXT_clip_cull_distance

GL_EXT_disjoint_timer_query

GL_EXT_texture_compression_s3tc_srgb

GL_MESA_shader_integer_functions

GL_EXT_clip_control

GL_EXT_texture_compression_bptc

GL_KHR_parallel_shader_compile

GL_EXT_texture_sRGB_R8

GL_MESA_framebuffer_flip_y

GL_EXT_depth_clamp

GL_EXT_texture_query_lod

I'm looking to update a 3D scatter plot in real time and hope that pyqtgraph can be used for this, a good first step would be for the example to work.

Thanks!

Michael