rc computer

computer.glsl

//https://thebookofshaders.com/edit.php

#ifdef GL_ES
precision mediump float;
#endif

uniform vec2 u_resolution;
uniform vec2 u_mouse;
uniform float u_time;

vec3 gray = vec3(22./255.,25./255.,25./255.);

float box(in vec2 st, in vec2 bl, in vec2 sz) {
    vec2 uv = step(st,bl) - step(st, vec2(bl.x + sz.x, bl.y + sz.y));
    return uv.x*uv.y;
}

vec3 greenBlinky(in vec2 st, in vec2 pos, in vec2 size, in float timeMult) {
	return (box(st, pos, size) * vec3(0.225,0.495,0.290) * abs(sin(u_time*timeMult)));
}

float keyDown(in float btm, in float timeOffset)
{
    if (sin((u_time + timeOffset) * 2.) < -0.95)
    {
        return btm - 0.01;
    }
    return btm;
}

void main() {
    vec2 st = gl_FragCoord.xy/u_resolution.xy;
    
    vec3 color = vec3(22./255.,25./255.,25./255.);
    vec2 bl = step(vec2(0.15,0.05),st);
    float pct = bl.x * bl.y;
    color += vec3(1.-pct);
    
    vec2 tr = step(vec2(0.15,0.05),1.0-st);
    pct *= tr.x * tr.y;
    
    color += (1.-pct);
    color += box(st,vec2(0.150,0.27),vec2(0.25,0.07));
    color += box(st,vec2(0.600,0.27),vec2(0.25,0.07));
    color += box(st,vec2(0.8,0.22),vec2(0.2,0.06));
    color += box(st,vec2(0.000,0.22),vec2(0.2,0.06));
    color += box(st, vec2(.2,.4), vec2(.6,.5));
    color -= box(st, vec2(.25,.45), vec2(.5,.4));
   	color += greenBlinky(st,vec2(0.25,0.710),vec2(0.07,0.07),2.);
    color += greenBlinky(st,vec2(0.39,0.710),vec2(0.07,0.07),1.5);
    color += greenBlinky(st,vec2(0.53,0.710),vec2(0.07,0.07),1.75);
    color += greenBlinky(st,vec2(0.320,0.570),vec2(0.14,0.07),1.8);
    color += greenBlinky(st,vec2(0.530,0.570),vec2(0.14,0.07),1.9);
    
    float keysize = 0.06;
    float keyboardleft = 0.25;
    
    bool isOdd = false;
    for (int i = 0; i < 8; i++) {
        float btm = 0.1;
        if (isOdd) {
            btm = 0.16;
        }
        
        float left = keyboardleft + float(i) * keysize;
        vec2 bl = vec2(left, keyDown(btm, sin(float(i) * 2. + 2.)));
        vec2 size = vec2(keysize, keysize);
        color += box(st, bl, size) * vec3(1., 1., 1.);
        isOdd = !isOdd;
    }
    
    gl_FragColor = vec4(color,1.0);
}