• September 22, 2021, 07:04:10 AM

 


Space FishFish SticksStone Volumes
Fish Sticks
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Description: Trying to capture the flavor of Vector Zen by  Chris_M_Thomasson.
Rendition of Kali Tower:  https://www.shadertoy.com/view/MtBGDG

Image is rendered twice, for 'cross-eyed' 3D viewing.
Sit as far back from the screen as you can bear.
Slightly cross your eyes so that there is a third image in the middle.
Relax your gaze, and concentrate only on that middle image, which is in 3D.

control.isteps = 4
control.cx = 5.360
control.cy = 1.000
control.cz = 4.000
control.cw = 0.130

float smin(float a, float b, float k ) {
    float h = clamp( 0.5+0.5*(b-a)/k, 0.0, 1.0 );
    return mix( b, a, h ) - k*h*(1.0-h);
}

float4 rotateXZ(float4 pos, float angle) {
    float ss = sin(angle);
    float cc = cos(angle);
    float qt = pos.x;
    pos.x = pos.x * cc - pos.z * ss;
    pos.z =    qt * ss + pos.z * cc;
    return pos;
}

float DE(float3 pos, device Control &control, thread float4 &orbitTrap) {
    float aa = smoothstep(0.,1.,clamp(cos(control.cy - pos.y * 0.4)*1.5,0.,1.)) * PI;
    float4 p = float4(pos,1);
    float3 ot;
   
    p.y -= control.cy * 0.25;
    p.y = abs(3. - fract((p.y - control.cy) / 2));
   
    for (int i=0; i < control.isteps; i++) {
        p.xyz = abs(p.xyz) - float3(.0,control.cx,.0);
        p = p * 2./clamp(dot(p.xyz,p.xyz),.3,1.) - float4(0.5,1.5,0.5,0.);
       
        p = rotateXZ(p,aa * control.cz);
       
        ot = p.xyz;
        orbitTrap = min(orbitTrap, float4(abs(ot), dot(ot,ot)));
    }
   
    float fl = pos.y-3.7 - length(sin(pos.xz * 60))*.01;
    float fr = max(abs(p.z/p.w)-.01,length(p.zx)/p.w-.002);
    float bl = max(abs(p.x/p.w)-.01,length(p.zy)/p.w-.0005);
    fr = smin(bl,fr,.02);
    fr *= 0.9;
    fl -= (length(p.xz)*.005+length(sin(pos * 3. + control.cy * 5.)) * control.cw);
    fl *=.9;
   
    return abs(smin(fl,fr,.7));
}


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Views: 42
Total Favorities: 0 View Who Favorited
Filesize: 4.62MB
Height: 1328 Width: 2778
Keywords: stereo 
Posted by: kosalos June 03, 2021, 11:39:32 PM

Rating: ***** by 2 members.
Total Likes: 2

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