Ok, I found where problem is. Regal should be compiled to emscripten with
special options, I use this command:
emmake make -f Makefile SYSTEM=emscripten
After that, in lib folder of Regal you can find static libs for emscripten.
This libs contains rgl* methods that replace original opengl api. So, I add
GL/Regal.h and compile my project again. Project was builded without any
error. But when I run it in browser I does not see anything, just black
screen and no errors. This project renders graphics correctly without regal
on LEGACY_GL_EMULATION=1, so I think that project code is fine and problem
is in integration of regal into emscripten.
I try to use all flags LEGACY_GL_EMULATION=1 | FULL_ES2=1 | FULL_ES3 = 1
results are same - black screen. Funny thing that Regal use
LEGACY_GL_EMULATION=1 to build itself. I can`t understand how I can found
where problem is. Any ideas?
Also I try to build project without linking Regal libs, only with headers,
and when I run program then I have this errors:
xception thrown: ReferenceError: GL is not defined,ReferenceError: GL is
not defined
at Object.createContext
at _glutCreateWindow
at Object._main
at Object.callMain
at doRun
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