feat(vulkan): vulkan 1.4 core with the user interface and the launcher, shaders split into ogl46/vk14 with SPIR-V binaries loaded first

shaders/apply_fog.glsl

@@ -1,41 +0,0 @@
-// fog between the camera and a fragment, see fog_volume.glsl and weather_common.glsl. a draw with a fog_density of 0 is not
-// fogged; one with another density than the regular one (the glare of lamps) gets the optical depth scaled by the ratio
-#include <fog_volume.glsl>
-
-// rgb: light the fog adds, a: what it lets through
-vec4 fog_at_fragment()
-{
-	if (fog_density <= 0.0)
-		return vec4(0.0, 0.0, 0.0, 1.0);
-	vec4 fog = fog_along_view(f_pos.xyz, gl_FragCoord.xy);
-	float scale = fog_density / max(fog_light.w, 1e-12);
-	if (abs(scale - 1.0) > 1e-3)
-	{
-		float transmittance = exp(log(max(fog.a, 1e-8)) * scale);
-		fog.rgb *= (1.0 - transmittance) / max(1.0 - fog.a, 1e-4);
-		fog.a = transmittance;
-	}
-	return fog;
-}
-
-vec3 get_fog_color()
-{
-	vec4 fog = fog_at_fragment();
-	return fog.rgb / max(1.0 - fog.a, 1e-4);
-}
-
-float get_fog_amount()
-{
-	return 1.0 - fog_at_fragment().a;
-}
-
-vec3 apply_fog(vec3 color)
-{
-	vec4 fog = fog_at_fragment();
-	return color * fog.a + fog.rgb;
-}
-
-vec3 add_fog(vec3 color, float amount)
-{
-	return color + fog_at_fragment().rgb * amount;
-}