[BUG] Broken camera

[SlawekNowy]

Describe the bug When playing empty animation (without keyframes) the camera spins wildly. (Build with ICU and IMGUI Filesystem)

To Reproduce Steps to reproduce the behavior:

1. Open nanoem.
2. Click "Play"

Expected behavior Camera stays in place

Screenshots https://youtu.be/xOBcZN0MHCE

Desktop (please complete the following information):

• OS: Linux Manjaro
• Tested using latest release and main.

[hkrn]

• What's shown in System Information ? (Edit > Preference > Global > System Information)
• What's cmake options did you set explicitly?

[SlawekNowy]

System Information: CPU: x86 (64-bit) Platform: Linux Compiler: GCC 11.1.0 (C++14) CRT: GNU C Library.

I set NANOEM_ENABLE_ICU and NANOEM_ENABLE_IMGUI_FILE_DIALOG to ON.

Addendum: Checked debug build. There the bug does not occur. Only in release.

[hkrn]

The bug has been reproduced with gcc 11.1 on Manjaro Linux (and also the debug build doesn't occur).

Resolution

This bug seems to be due to gcc optimization, so the easiest and quickest fix is to use clang instead of gcc as following example commands.

sudo pacman -S clang

cd $NANOEM_DIRECTORY
CC=clang CXX=clang++ NANOEM_TARGET_COMPILER=clang cmake -P scripts/build.cmake

mkdir out
cd out
CC=clang CXX=clang++ NANOEM_TARGET_COMPILER=clang cmake ..
cmake --build .

[SlawekNowy]

Closing since this is compiler bug.