Hlms generates shaders with locale aware numbers.

[przemir]

System Information

• Ogre Version: 4.0.0 (unstable)
• Operating System / Platform: OpenSuse Slowroll
• RenderSystem: OpenGL, Vulkan

Detailled description

LwString::a(Float) may convert number with commas instead of dots:

Later it goes to pieces:

and this generate glsl shader

	***	hlms_shadowmap2_uv_max_y	0,428571
	***	hlms_shadowmap1_uv_min_x	0,000000
	***	hlms_shadowmap0_uv_min_y	0,000000
	***	hlms_shadowmap2_uv_min_y	0,285714
	***	hlms_shadowmap1_uv_max_x	0,500000
	***	hlms_shadowmap0_uv_min_x	0,000000
	***	hlms_shadowmap1_uv_min_y	0,285714
	***	hlms_shadowmap0_uv_max_x	1,000000
	***	hlms_shadowmap2_uv_max_x	1,000000
	***	hlms_shadowmap1_uv_max_y	0,428571
	***	hlms_shadowmap2_uv_min_x	0,500000
	***	hlms_shadowmap0_uv_max_y	0,285714

and

#define hlms_shadowmap0_uv_min float2( 0,000000, 0,000000 )
#define hlms_shadowmap0_uv_max float2( 1,000000, 0,285714 )

which causes shader compilation error.

Why it happened

In my case QApplication constructor changed locale settings.
std::setlocale(LC_NUMERIC, "") returns "pl_PL.utf8" and for Polish language commas are used instead of dots. Don't know why it affects linux but not windows.

Workaround

Placing
setlocale(LC_NUMERIC, "C");
after QApplication constructor helps (it is global setting though).