[GRASS-dev] [GRASS GIS] #3600: m.nviz.image doesn't produce any output

[GRASS GIS]

#3600: m.nviz.image doesn't produce any output
--------------------------+-------------------------
  Reporter:  guano        |      Owner:  grass-dev@…
      Type:  defect       |     Status:  new
  Priority:  normal       |  Milestone:
 Component:  Default      |    Version:  7.0.4
Resolution:               |   Keywords:
       CPU:  Unspecified  |   Platform:  MacOSX
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Comment (by hcho):

 Please try these patches. They implement buffer swapping. I tested on
 Linux and got no errors.

 {{{
 > m.nviz.image elevation_map=elevation at PERMANENT
 color_map=elevation at PERMANENT resolution_fine=1 height=800 perspective=20
 output=elevation format=tif size=640,480
 Loading raster map <elevation at PERMANENT>...
  100%
 Loading raster map <elevation at PERMANENT>...
  100%
 Translating colors from raster map <elevation at PERMANENT>...
  100%
 GL Error 1: 0  <------------------------------------------ before
 glReadBuffer
 GL Error 2: 0  <------------------------------------------ after
 glReadBuffer
 m.nviz.image complete. File <elevation.tif> created.
 }}}

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Ticket URL: <https://trac.osgeo.org/grass/ticket/3600#comment:55>
GRASS GIS <https://grass.osgeo.org>