/usr/lib/R/site-library/rgl/initNotes.txt is in r-cran-rgl 0.99.9-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | Notes on initialization of rglClass scenes:
writeWebGL and renderValue call rglClass.initialize
rglClass.initialize calls rglClass.initCanvas
rglClass.initCanvas creates the canvas and
does a bunch of other initialization:
copyObj - no GL stuff
initSubscene - no GL stuff
setMouseHandlers - doesn't do GL stuff itself, but
does set up calls to drawScene
initGL0 - tests for WebGL support, then calls initGL.
initSphere - sets up sphere and does GL stuff
initObj - sets up a lot of things and does GL stuff
rglClass.initGL0 checks for existence of WebGL, then calls rglClass.initGL.
rglClass.initGL gets the context.
Scene object initialization:
initObj sets initialized
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