Poor rendering quality far away (1AU) from the origin #970

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1. robnee commented on Mar 25, 2021

   

   robnee

   on Mar 25, 2021

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   Are you talking about the circles rendered as piece-wise-linear-segments (vs smooth curves) or the poorly rendered line segments? If the latter what does the GL vendor/renderer/version at the bottom of the configuration window say? I know there are some rendering issues with some Intel GPUs.
2. phkahler

   changed the title [-]Poor rendering quality far away from the origin[/-] [+]Poor rendering quality far away (1AU) from the origin[/+] on Mar 25, 2021
3. baryluk commented on Mar 26, 2021

   

   baryluk

   on Mar 26, 2021

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   Are you talking about the circles rendered as piece-wise-linear-segments (vs smooth curves) or the poorly rendered line segments?

   The second part.

   Antialiasing quality is very poor for some lines, some almost vanish, or have significant moira-like pattern.

   Some small squares, are rendered as rectangles.

   

   $ glxinfo  -B
   name of display: :0
   display: :0  screen: 0
   direct rendering: Yes
   Extended renderer info (GLX_MESA_query_renderer):
       Vendor: AMD (0x1002)
       Device: AMD Radeon (TM) R9 Fury Series (FIJI, DRM 3.40.0, 5.10.0-4-amd64, LLVM 11.0.1) (0x7300)
       Version: 20.3.4
       Accelerated: yes
       Video memory: 4096MB
       Unified memory: no
       Preferred profile: core (0x1)
       Max core profile version: 4.6
       Max compat profile version: 4.6
       Max GLES1 profile version: 1.1
       Max GLES[23] profile version: 3.2
   Memory info (GL_ATI_meminfo):
       VBO free memory - total: 3784 MB, largest block: 3784 MB
       VBO free aux. memory - total: 3993 MB, largest block: 3993 MB
       Texture free memory - total: 3784 MB, largest block: 3784 MB
       Texture free aux. memory - total: 3993 MB, largest block: 3993 MB
       Renderbuffer free memory - total: 3784 MB, largest block: 3784 MB
       Renderbuffer free aux. memory - total: 3993 MB, largest block: 3993 MB
   Memory info (GL_NVX_gpu_memory_info):
       Dedicated video memory: 4096 MB
       Total available memory: 8192 MB
       Currently available dedicated video memory: 3784 MB
   OpenGL vendor string: AMD
   OpenGL renderer string: AMD Radeon (TM) R9 Fury Series (FIJI, DRM 3.40.0, 5.10.0-4-amd64, LLVM 11.0.1)
   OpenGL core profile version string: 4.6 (Core Profile) Mesa 20.3.4
   OpenGL core profile shading language version string: 4.60
   OpenGL core profile context flags: (none)
   OpenGL core profile profile mask: core profile
   
   OpenGL version string: 4.6 (Compatibility Profile) Mesa 20.3.4
   OpenGL shading language version string: 4.60
   OpenGL context flags: (none)
   OpenGL profile mask: compatibility profile
   
   OpenGL ES profile version string: OpenGL ES 3.2 Mesa 20.3.4
   OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20
   
   
4. ruevs commented on Mar 26, 2021

   

   ruevs

   on Mar 26, 2021

   Last edited by ruevs

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   Yes, I have also noticed this (a long time ago). For example on a Raspberry Pi where the OpenGL renderer seems to be a 128bit software one the problem does not exist:
   #825 (comment)

   Also dimensions (length constraints) fall apart.
5. ruevs

   added

   internals

   on Oct 9, 2022
6. ruevs

   added a related issue on Nov 4, 2026

   • Poor precision of Z-buffer #535