Nightvision postfx shader

[Jigoku]

Screenshot:

Video: https://streamable.com/ciu5sw
(clip doesn't do it justice, as the grain/noise messes with video compression)

Place this in nightvision.cfg and run exec nightvision.cfg
This will bind to N as a toggle key:

defvarp nightvision 0 0 1

bind N [ 
    nightvision (= $nightvision); 
    if ($nightvision) [ 
        setpostfx nv 
        fullbrightmodels 200
        fullbrightfocus 3
        sound 181 
        sound 209
    ][ 
        clearpostfx 
        fullbrightmodels 0
        fullbrightfocus 0
        sound 181 
        sound 239
    ]
]

Place the shader near the bottom of the file named config/glsl/postfx.cfg

// night vision postfx shader
lazyshader 0 "nv" (fsvs) (fsps [
    color.rgb *= mod(texcoord0.y,2.0)/2.0;   
    float noiselevel = 0.5;
    float noise = rand(texcoord0 + vec2(float(millis)));
    float grey = dot(color.xyz, vec3(0.5, 0.5, 0.5));
    vec3 green = vec3(1.1, 3.0, 1.1);
    
    fragcolor = (vec4(grey*green, color.a) + noise * noiselevel);
][
    float rand(vec2 co) { return fract(sin(dot(co.xy, vec2(12.9898, 78.233)))*43758.5453); }
    uniform float millis;
])

[qreeves]

Hax 🤣

[qreeves]

Merged into main as of c884a5e