Isolating invisible models bug

[iceiix]

Attempt to reduce a test case for https://github.com/iceiix/steven/issues/25 Invisible players/models

[iceiix]

Observed heightP and texP uninitialized warnings: https://github.com/iceiix/steven/issues/32, but removed clouds_geo in f219e98 so it wasn't causing this problem.

Would like to use code coverage to help create a more minimal reproduction case, found https://users.rust-lang.org/t/tutorial-how-to-collect-test-coverages-for-rust-project/650 and compiled kcov as in https://github.com/SimonKagstrom/kcov/blob/master/INSTALL.md, used master commit ab4774d6798a17b908b10119e7c06a017566c4ba Thu Oct 25 10:03:55 2018 on Ubuntu 18.04.1, but it crashes with:

ubuntu@ubuntu-virtual-machine:~/steven$ kcov --verify target/cov target/release/steven
kcov: 1 invalid breakpoints skipped in /lib/x86_64-linux-gnu/libdl.so.2
kcov: 3 invalid breakpoints skipped in /lib/x86_64-linux-gnu/librt.so.1
kcov: 7 invalid breakpoints skipped in /lib/x86_64-linux-gnu/libpthread.so.0
kcov: 2 invalid breakpoints skipped in /lib/x86_64-linux-gnu/libc.so.6
kcov: 1 invalid breakpoints skipped in /lib/x86_64-linux-gnu/libnsl.so.1
kcov: 262 invalid breakpoints skipped in /lib/x86_64-linux-gnu/libresolv.so.2
Starting steven
kcov: Process exited with signal 4 (SIGILL) at 0x7ffff62bc6f3

kcov: Illegal instructions are sometimes caused by some GCC versions
kcov: miscompiling C++ headers. If the problem is persistent, try running
kcov: with --verify. For more information, see
kcov: http://github.com/SimonKagstrom/kcov/issues/18

crash in gdb:

Thread 2 "kcov" received signal SIGTERM, Terminated.
[Switching to Thread 0x7ffff0466700 (LWP 16408)]
0x00007ffff783edae in __libc_open64 (
    file=0x555555d0e9c0 "target/cov//steven.cca448123baac1fd/kcov-solib.pipe", oflag=oflag@entry=0)
    at ../sysdeps/unix/sysv/linux/open64.c:47
47	../sysdeps/unix/sysv/linux/open64.c: No such file or directory.
(gdb) bt
#0  0x00007ffff783edae in __libc_open64 (
    file=0x555555d0e9c0 "target/cov//steven.cca448123baac1fd/kcov-solib.pipe", oflag=oflag@entry=0)
    at ../sysdeps/unix/sysv/linux/open64.c:47
#1  0x00005555555c5712 in open (__oflag=0, __path=<optimized out>)
    at /usr/include/x86_64-linux-gnu/bits/fcntl2.h:53
#2  SolibHandler::solibThreadParse (this=0x555555ceea70) at /home/ubuntu/kcov/src/solib-handler.cc:144
#3  0x00005555555c58d8 in SolibHandler::solibThreadMain (this=0x555555ceea70)
    at /home/ubuntu/kcov/src/solib-handler.cc:187
#4  SolibHandler::threadStatic (pThis=0x555555ceea70) at /home/ubuntu/kcov/src/solib-handler.cc:196
#5  0x00007ffff78346db in start_thread (arg=0x7ffff0466700) at pthread_create.c:463
#6  0x00007ffff634a88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
(gdb) 

so we don't have code coverage to help...

But the current status is more minimal than began with, sun/moon shown on Ubuntu 18.04.1 in VMware Fusion, correctly:

and there is the sky, but no sun model on AMD Radeon Pro 580, iMac 2017, macOS 10.14 (and AMD Radeon R9 M295X on iMac late 2014, Intel HD Graphics 4000 on MacBook Air mid-2012 macOS 10.13.6), the bug:

[iceiix]

• main src/main.rs
  • src/render/shader.rs
    • src/render/shaders/trans_frag.glsl, src/render/shaders/trans_vertex.glsl
    • src/render/shaders/model_frag.glsl, src/render/shaders/model_vetex.glsl
    • src/render/shaders/sun_frag.glsl, src/render/shaders/sun_vetex.glsl
  • sun_model.tick src/server/sun.rs
  • game.renderer.tick src/render/mod.rs
    • self.model.draw src/render/model.rs
      • gl::draw_elements
    • trans.trans.bind
    • trans.draw

[iceiix]

Moved to a new separate smaller project, without (most) of the extra code: https://github.com/iceiix/invisible

[iceiix]