| license: gpl-3.0 |
This block is a continuation of a previous block, and a recreation:
| <meta charset="utf-8"> | |
| <style> | |
| #under-construction { | |
| display: none; | |
| position: absolute; | |
| top: 200px; | |
| left: 300px; | |
| font-size: 40px; | |
| } | |
| .layer { | |
| opacity: 0.9; | |
| } | |
| .particle .seed { | |
| fill: black; | |
| } | |
| .influence-zone { | |
| stroke: none; | |
| } | |
| #layer-0 .influence-zone { | |
| fill: url("#radial-gradient-0"); | |
| } | |
| #layer-1 .influence-zone { | |
| fill: url("#radial-gradient-1"); | |
| } | |
| #layer-2 .influence-zone { | |
| fill: url("#radial-gradient-2"); | |
| } | |
| </style> | |
| <body> | |
| <div id="under-construction"> | |
| UNDER CONSTRUCTION | |
| </div> | |
| <svg> | |
| <defs> | |
| <radialGradient id="radial-gradient-0" cx="50%" cy="50%" r="50%"> | |
| <stop offset="25%" stop-color="white"></stop> | |
| <stop offset="100%" stop-color="green"></stop> | |
| </radialGradient> | |
| <radialGradient id="radial-gradient-1" cx="50%" cy="50%" r="50%"> | |
| <stop offset="25%" stop-color="white"></stop> | |
| <stop offset="100%" stop-color="blue"></stop> | |
| </radialGradient> | |
| <radialGradient id="radial-gradient-2" cx="50%" cy="50%" r="50%"> | |
| <stop offset="25%" stop-color="white"></stop> | |
| <stop offset="100%" stop-color="red"></stop> | |
| </radialGradient> | |
| </defs> | |
| </svg> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script src="simplex-noise.min.js"></script> | |
| <script src="https://raw.githack.com/Kcnarf/d3-distanceLimitedVoronoi/master/distance-limited-voronoi.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500; | |
| var layerCount = 3, | |
| particleCountPerLayer = 25, | |
| particles = new Array(layerCount), | |
| influenceRadius = 10, | |
| proximityTreshold = Math.pow(3*influenceRadius, 2), | |
| baseOpacity= 0.25; | |
| for (var l = 0; l < layerCount; ++l) { | |
| particles[l] = new Array(particleCountPerLayer); | |
| for (var i = 0; i < particleCountPerLayer; ++i) { | |
| particles[l][i] = { | |
| x: Math.random() * width, | |
| y: Math.random() * height | |
| }; | |
| } | |
| } | |
| var simplex = new SimplexNoise(); | |
| var limitedVoronoi = d3.distanceLimitedVoronoi() | |
| .limit(influenceRadius) | |
| .extent([[-influenceRadius,-influenceRadius],[width+influenceRadius,height+influenceRadius]]) | |
| .x( function(d) { return d.x }) | |
| .y( function(d) { return d.y }); | |
| var svg = d3.select("svg"); | |
| svg.attr("width", width) | |
| .attr("height", height); | |
| //begin: add layers | |
| svg.selectAll("g").data(d3.range(layerCount)) | |
| .enter() | |
| .append("g") | |
| .classed("layer", true) | |
| .attr("id", function(d) { return "layer-"+d; }); | |
| //end: add layers | |
| //begin: add particles on appropriate layer | |
| for (var l = 0; l < layerCount; l++) { | |
| var layer = svg.select("#layer-"+l); | |
| var clipPathName = "clip-"+l+"-"; | |
| var drawnParticles = layer.selectAll(".particle").data(particles[0]); | |
| enteringParticles = drawnParticles.enter() | |
| .append("g") | |
| .classed("particle", true); | |
| enteringParticles | |
| .append("clipPath") | |
| .attr("id", function(d,i){ return clipPathName+i; }) | |
| .append("path") | |
| .classed("clip", true); | |
| enteringParticles.append("circle") | |
| .classed("influence-zone", true) | |
| .attr("r", influenceRadius) | |
| .attr("clip-path", function(d, i){ return "url(#"+clipPathName+i+")"; }); | |
| } | |
| //end: add particles on appropriate layer | |
| d3.timer(function(elapsed) { | |
| //begin: update particles' position using SimplexNoise | |
| for (var l = 0; l < layerCount; l++) { | |
| var layer = svg.select("#layer-"+l); | |
| for (var i = 0; i < particleCountPerLayer; ++i) { | |
| var velocity = elapsed/20000; | |
| var p = particles[l][i]; | |
| var noiseIndex = 10*l+i/particleCountPerLayer; | |
| var layeredNoise = simplex.noise3D(p.x, p.y, l); | |
| var layeredNoiseBasedAngle = Math.PI*layeredNoise; | |
| var p = particles[l][i]; | |
| p.x = (width/2)+(width/2)*simplex.noise2D(noiseIndex, velocity); | |
| p.y = (height/2)+(height/2)*simplex.noise2D(velocity, noiseIndex); | |
| if (p.x < -influenceRadius) { | |
| p.x += (width+2*influenceRadius); | |
| } else if (p.x > width+influenceRadius) { | |
| p.x -= (width+2*influenceRadius); | |
| } | |
| if (p.y < -influenceRadius) { | |
| p.y += (height+2*influenceRadius); | |
| } else if (p.y > height+influenceRadius) { | |
| p.y -= (height+2*influenceRadius); | |
| } | |
| } | |
| //end: update particles' position using SimplexNoise | |
| var limitedCells = limitedVoronoi(particles[l]); | |
| var minSquareDists = computeMinSquareDists(particles[l]); | |
| //begin: update drawn particles' clip for blobbing effect | |
| layer.selectAll(".particle .clip").data(limitedCells) | |
| .attr("d", function(d) { return d.path; }); | |
| //and: update drawn particles' clip for blobbing effect | |
| //begin: update drawn particles' position and opacity | |
| layer.selectAll(".particle .influence-zone").data(limitedCells) | |
| .attr("cx", function(d) { return d.datum.x; }) | |
| .attr("cy", function(d) { return d.datum.y; }) | |
| .style("fill-opacity", function(d,i) { | |
| var minSquareDist = minSquareDists[i]; | |
| if (minSquareDist>proximityTreshold) { | |
| return baseOpacity; | |
| } else { | |
| return baseOpacity + (1-baseOpacity)*(1-minSquareDist/proximityTreshold); | |
| } | |
| }); | |
| //begin: update drawn particles' position and opacity | |
| } | |
| function computeMinSquareDists (particles) { | |
| var minSquareDists = []; | |
| for(var i=0; i<particleCountPerLayer; i++) { | |
| minSquareDists[i] = Infinity; | |
| } | |
| for(var i=0; i<particleCountPerLayer; i++) { | |
| for(var j=i+1; j<particleCountPerLayer; j++) { | |
| var squareDist = Math.pow(particles[i].x-particles[j].x,2)+Math.pow(particles[i].y-particles[j].y,2) | |
| if (squareDist<minSquareDists[i]) { | |
| minSquareDists[i] = squareDist; | |
| } | |
| if (squareDist<minSquareDists[j]) { | |
| minSquareDists[j] = squareDist; | |
| } | |
| } | |
| } | |
| return minSquareDists; | |
| } | |
| }); | |
| </script> | |
| </body> |
| /*! simplex-noise.js: copyright 2012 Jonas Wagner, licensed under a MIT license. See https://github.com/jwagner/simplex-noise.js for details */ | |
| (function(){function o(e){e||(e=Math.random),this.p=new Uint8Array(256),this.perm=new Uint8Array(512),this.permMod12=new Uint8Array(512);for(var t=0;t<256;t++)this.p[t]=e()*256;for(t=0;t<512;t++)this.perm[t]=this.p[t&255],this.permMod12[t]=this.perm[t]%12}var e=.5*(Math.sqrt(3)-1),t=(3-Math.sqrt(3))/6,n=1/3,r=1/6,i=(Math.sqrt(5)-1)/4,s=(5-Math.sqrt(5))/20;o.prototype={grad3:new Float32Array([1,1,0,-1,1,0,1,-1,0,-1,-1,0,1,0,1,-1,0,1,1,0,-1,-1,0,-1,0,1,1,0,-1,1,0,1,-1,0,-1,-1]),grad4:new Float32Array([0,1,1,1,0,1,1,-1,0,1,-1,1,0,1,-1,-1,0,-1,1,1,0,-1,1,-1,0,-1,-1,1,0,-1,-1,-1,1,0,1,1,1,0,1,-1,1,0,-1,1,1,0,-1,-1,-1,0,1,1,-1,0,1,-1,-1,0,-1,1,-1,0,-1,-1,1,1,0,1,1,1,0,-1,1,-1,0,1,1,-1,0,-1,-1,1,0,1,-1,1,0,-1,-1,-1,0,1,-1,-1,0,-1,1,1,1,0,1,1,-1,0,1,-1,1,0,1,-1,-1,0,-1,1,1,0,-1,1,-1,0,-1,-1,1,0,-1,-1,-1,0]),noise2D:function(n,r){var i=this.permMod12,s=this.perm,o=this.grad3,u,a,f,l=(n+r)*e,c=Math.floor(n+l),h=Math.floor(r+l),p=(c+h)*t,d=c-p,v=h-p,m=n-d,g=r-v,y,b;m>g?(y=1,b=0):(y=0,b=1);var w=m-y+t,E=g-b+t,S=m-1+2*t,x=g-1+2*t,T=c&255,N=h&255,C=.5-m*m-g*g;if(C<0)u=0;else{var k=i[T+s[N]]*3;C*=C,u=C*C*(o[k]*m+o[k+1]*g)}var L=.5-w*w-E*E;if(L<0)a=0;else{var A=i[T+y+s[N+b]]*3;L*=L,a=L*L*(o[A]*w+o[A+1]*E)}var O=.5-S*S-x*x;if(O<0)f=0;else{var M=i[T+1+s[N+1]]*3;O*=O,f=O*O*(o[M]*S+o[M+1]*x)}return 70*(u+a+f)},noise3D:function(e,t,i){var s=this.permMod12,o=this.perm,u=this.grad3,a,f,l,c,h=(e+t+i)*n,p=Math.floor(e+h),d=Math.floor(t+h),v=Math.floor(i+h),m=(p+d+v)*r,g=p-m,y=d-m,b=v-m,w=e-g,E=t-y,S=i-b,x,T,N,C,k,L;w<E?E<S?(x=0,T=0,N=1,C=0,k=1,L=1):w<S?(x=0,T=1,N=0,C=0,k=1,L=1):(x=0,T=1,N=0,C=1,k=1,L=0):E<S?w<S?(x=0,T=0,N=1,C=1,k=0,L=1):(x=1,T=0,N=0,C=1,k=0,L=1):(x=1,T=0,N=0,C=1,k=1,L=0);var A=w-x+r,O=E-T+r,M=S-N+r,_=w-C+2*r,D=E-k+2*r,P=S-L+2*r,H=w-1+3*r,B=E-1+3*r,j=S-1+3*r,F=p&255,I=d&255,q=v&255,R=.6-w*w-E*E-S*S;if(R<0)a=0;else{var U=s[F+o[I+o[q]]]*3;R*=R,a=R*R*(u[U]*w+u[U+1]*E+u[U+2]*S)}var z=.6-A*A-O*O-M*M;if(z<0)f=0;else{var W=s[F+x+o[I+T+o[q+N]]]*3;z*=z,f=z*z*(u[W]*A+u[W+1]*O+u[W+2]*M)}var X=.6-_*_-D*D-P*P;if(X<0)l=0;else{var V=s[F+C+o[I+k+o[q+L]]]*3;X*=X,l=X*X*(u[V]*_+u[V+1]*D+u[V+2]*P)}var $=.6-H*H-B*B-j*j;if($<0)c=0;else{var J=s[F+1+o[I+1+o[q+1]]]*3;$*=$,c=$*$*(u[J]*H+u[J+1]*B+u[J+2]*j)}return 32*(a+f+l+c)},noise4D:function(e,t,n,r){var o=this.permMod12,u=this.perm,a=this.grad4,f,l,c,h,p,d=(e+t+n+r)*i,v=Math.floor(e+d),m=Math.floor(t+d),g=Math.floor(n+d),y=Math.floor(r+d),b=(v+m+g+y)*s,w=v-b,E=m-b,S=g-b,x=y-b,T=e-w,N=t-E,C=n-S,k=r-x,L=0,A=0,O=0,M=0;T>N?L++:A++,T>C?L++:O++,T>k?L++:M++,N>C?A++:O++,N>k?A++:M++,C>k?O++:M++;var _,D,P,H,B,j,F,I,q,R,U,z;_=L<3?0:1,D=A<3?0:1,P=O<3?0:1,H=M<3?0:1,B=L<2?0:1,j=A<2?0:1,F=O<2?0:1,I=M<2?0:1,q=L<1?0:1,R=A<1?0:1,U=O<1?0:1,z=M<1?0:1;var W=T-_+s,X=N-D+s,V=C-P+s,$=k-H+s,J=T-B+2*s,K=N-j+2*s,Q=C-F+2*s,G=k-I+2*s,Y=T-q+3*s,Z=N-R+3*s,et=C-U+3*s,tt=k-z+3*s,nt=T-1+4*s,rt=N-1+4*s,it=C-1+4*s,st=k-1+4*s,ot=v&255,ut=m&255,at=g&255,ft=y&255,lt=.6-T*T-N*N-C*C-k*k;if(lt<0)f=0;else{var ct=u[ot+u[ut+u[at+u[ft]]]]%32*4;lt*=lt,f=lt*lt*(a[ct]*T+a[ct+1]*N+a[ct+2]*C+a[ct+3]*k)}var ht=.6-W*W-X*X-V*V-$*$;if(ht<0)l=0;else{var pt=u[ot+_+u[ut+D+u[at+P+u[ft+H]]]]%32*4;ht*=ht,l=ht*ht*(a[pt]*W+a[pt+1]*X+a[pt+2]*V+a[pt+3]*$)}var dt=.6-J*J-K*K-Q*Q-G*G;if(dt<0)c=0;else{var vt=u[ot+B+u[ut+j+u[at+F+u[ft+I]]]]%32*4;dt*=dt,c=dt*dt*(a[vt]*J+a[vt+1]*K+a[vt+2]*Q+a[vt+3]*G)}var mt=.6-Y*Y-Z*Z-et*et-tt*tt;if(mt<0)h=0;else{var gt=u[ot+q+u[ut+R+u[at+U+u[ft+z]]]]%32*4;mt*=mt,h=mt*mt*(a[gt]*Y+a[gt+1]*Z+a[gt+2]*et+a[gt+3]*tt)}var yt=.6-nt*nt-rt*rt-it*it-st*st;if(yt<0)p=0;else{var bt=u[ot+1+u[ut+1+u[at+1+u[ft+1]]]]%32*4;yt*=yt,p=yt*yt*(a[bt]*nt+a[bt+1]*rt+a[bt+2]*it+a[bt+3]*st)}return 27*(f+l+c+h+p)}},typeof define!="undefined"&&define.amd?define(function(){return o}):typeof window!="undefined"&&(window.SimplexNoise=o),typeof exports!="undefined"&&(exports.SimplexNoise=o),typeof module!="undefined"&&(module.exports=o)})(); |
