wlbg: swap shader

scripts/wlbg/src/bg_frag.glsl

@@ -8,126 +8,21 @@ in vec2 fragCoord;
 
 out vec4 fragColor;
 
-// shader: https://www.shadertoy.com/view/3l23Rh
+// shader: https://www.shadertoy.com/view/mtGBzm
 
-mat2 rot(in float a){float c = cos(a), s = sin(a);return mat2(c,s,-s,c);}
-const mat3 m3 = mat3(0.33338, 0.56034, -0.71817, -0.87887, 0.32651, -0.15323, 0.15162, 0.69596, 0.61339)*1.93;
-float mag2(vec2 p){return dot(p,p);}
-float linstep(in float mn, in float mx, in float x){ return clamp((x - mn)/(mx - mn), 0., 1.); }
-float prm1 = 0.;
-vec2 bsMo = vec2(0);
-
-vec2 disp(float t){ return vec2(sin(t*0.22)*1., cos(t*0.175)*1.)*2.; }
-
-vec2 map(vec3 p)
-{
-    vec3 p2 = p;
-    p2.xy -= disp(p.z).xy;
-    p.xy *= rot(sin(p.z+time)*(0.1 + prm1*0.05) + time*0.09);
-    float cl = mag2(p2.xy);
-    float d = 0.;
-    p *= .61;
-    float z = 1.;
-    float trk = 1.;
-    float dspAmp = 0.1 + prm1*0.2;
-    for(int i = 0; i < 5; i++)
-    {
-		p += sin(p.zxy*0.75*trk + time*trk*.8)*dspAmp;
-        d -= abs(dot(cos(p), sin(p.yzx))*z);
-        z *= 0.57;
-        trk *= 1.4;
-        p = p*m3;
-    }
-    d = abs(d + prm1*3.)+ prm1*.3 - 2.5 + bsMo.y;
-    return vec2(d + cl*.2 + 0.25, cl);
+float sq(float x) {
+    return x*x;
 }
 
-vec4 render( in vec3 ro, in vec3 rd, float actualTime )
-{
-	vec4 rez = vec4(0);
-    const float ldst = 8.;
-	vec3 lpos = vec3(disp(actualTime + ldst)*0.5, time + ldst);
-	float t = 1.5;
-	float fogT = 0.;
-	for(int i=0; i<130; i++)
-	{
-		if(rez.a > 0.99)break;
-
-		vec3 pos = ro + t*rd;
-        vec2 mpv = map(pos);
-		float den = clamp(mpv.x-0.3,0.,1.)*1.12;
-		float dn = clamp((mpv.x + 2.),0.,3.);
-        
-		vec4 col = vec4(0);
-        if (mpv.x > 0.6)
-        {
-        
-            col = vec4(sin(vec3(5.,0.4,0.2) + mpv.y*0.1 +sin(pos.z*0.4)*0.5 + 1.8)*0.5 + 0.5,0.08);
-            col *= den*den*den;
-			col.rgb *= linstep(4.,-2.5, mpv.x)*2.3;
-            float dif =  clamp((den - map(pos+.8).x)/9., 0.001, 1. );
-            dif += clamp((den - map(pos+.35).x)/2.5, 0.001, 1. );
-            col.xyz *= den*(vec3(0.005,.045,.075) + 1.5*vec3(0.033,0.07,0.03)*dif);
+void main() {
+    vec2 p = fragCoord;
+    vec3 col;
+    for(float j = 0.0; j < 3.0; j++){
+        for(float i = 1.0; i < 10.0; i++){
+            p.x += 0.2 / (i + j) * cos(i * 5.0 * p.y + time );
+            p.y += 0.2 / (i + j)* cos(i * 5.0 * p.x + time );
         }
-		
-		float fogC = exp(t*0.2 - 2.2);
-		col.rgba += vec4(0.06,0.11,0.11, 0.1)*clamp(fogC-fogT, 0., 1.);
-		fogT = fogC;
-		rez = rez + col*(1. - rez.a);
-		t += clamp(0.5 - dn*dn*.05, 0.09, 0.3);
-	}
-	return clamp(rez, 0.0, 1.0);
-}
-
-float getsat(vec3 c)
-{
-    float mi = min(min(c.x, c.y), c.z);
-    float ma = max(max(c.x, c.y), c.z);
-    return (ma - mi)/(ma+ 1e-7);
-}
-
-//from my "Will it blend" shader (https://www.shadertoy.com/view/lsdGzN)
-vec3 iLerp(in vec3 a, in vec3 b, in float x)
-{
-    vec3 ic = mix(a, b, x) + vec3(1e-6,0.,0.);
-    float sd = abs(getsat(ic) - mix(getsat(a), getsat(b), x));
-    vec3 dir = normalize(vec3(2.*ic.x - ic.y - ic.z, 2.*ic.y - ic.x - ic.z, 2.*ic.z - ic.y - ic.x));
-    float lgt = dot(vec3(1.0), ic);
-    float ff = dot(dir, normalize(ic));
-    ic += 1.5*dir*sd*ff*lgt;
-    return clamp(ic,0.,1.);
-}
-
-void main()
-{	
-	vec2 q = fragCoord.xy - 1.;
-    vec2 p = fragCoord.xy;
-    
-    float actualTime = time*3.;
-    vec3 ro = vec3(0,0,actualTime);
-    
-    ro += vec3(sin(time)*0.5,sin(time*1.)*0.,0);
-        
-    float dspAmp = .85;
-    ro.xy += disp(ro.z)*dspAmp;
-    float tgtDst = 3.5;
-    
-    vec3 target = normalize(ro - vec3(disp(actualTime + tgtDst)*dspAmp, actualTime + tgtDst));
-    ro.x -= bsMo.x*2.;
-    vec3 rightdir = normalize(cross(target, vec3(0,1,0)));
-    vec3 updir = normalize(cross(rightdir, target));
-    rightdir = normalize(cross(updir, target));
-	vec3 rd=normalize((p.x*rightdir + p.y*updir)*1. - target);
-    //rd.xy *= rot(-disp(actualTime + 3.5).x*0.2 + bsMo.x);
-    prm1 = smoothstep(-0.4, 0.4,sin(time*0.3));
-	vec4 scn = render(ro, rd, actualTime);
-		
-    vec3 col = scn.rgb;
-    col = iLerp(col.bgr, col.rgb, clamp(1.-prm1,0.05,1.));
-    
-    col = pow(col, vec3(.55,0.65,0.6))*vec3(1.,.97,.9);
-
-    col *= pow( 16.0*q.x*q.y*(1.0-q.x)*(1.0-q.y), 0.12)*0.7+0.3; //Vign
-    
-	fragColor = vec4( col, 1.0 );
+        col[int(j)] = sin(.5 * 7.0*sq(p.x)) + sin(7.0*sq(p.y));
+    }
+    fragColor = vec4(1.) - vec4(col, 1.);
 }