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2 lines
27 KiB
JavaScript
2 lines
27 KiB
JavaScript
4 years ago
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var rough=function(){"use strict";function t(t,e,s){if(t&&t.length){const[n,o]=e,a=Math.PI/180*s,r=Math.cos(a),h=Math.sin(a);t.forEach(t=>{const[e,s]=t;t[0]=(e-n)*r-(s-o)*h+n,t[1]=(e-n)*h+(s-o)*r+o})}}function e(t){const e=t[0],s=t[1];return Math.sqrt(Math.pow(e[0]-s[0],2)+Math.pow(e[1]-s[1],2))}function s(t,e,s,n){const o=e[1]-t[1],a=t[0]-e[0],r=o*t[0]+a*t[1],h=n[1]-s[1],i=s[0]-n[0],c=h*s[0]+i*s[1],l=o*i-h*a;return l?[(i*r-a*c)/l,(o*c-h*r)/l]:null}function n(t,e,s){const n=t.length;if(n<3)return!1;const h=[Number.MAX_SAFE_INTEGER,s],i=[e,s];let c=0;for(let e=0;e<n;e++){const s=t[e],l=t[(e+1)%n];if(r(s,l,i,h)){if(0===a(s,i,l))return o(s,i,l);c++}}return c%2==1}function o(t,e,s){return e[0]<=Math.max(t[0],s[0])&&e[0]>=Math.min(t[0],s[0])&&e[1]<=Math.max(t[1],s[1])&&e[1]>=Math.min(t[1],s[1])}function a(t,e,s){const n=(e[1]-t[1])*(s[0]-e[0])-(e[0]-t[0])*(s[1]-e[1]);return 0===n?0:n>0?1:2}function r(t,e,s,n){const r=a(t,e,s),h=a(t,e,n),i=a(s,n,t),c=a(s,n,e);return r!==h&&i!==c||(!(0!==r||!o(t,s,e))||(!(0!==h||!o(t,n,e))||(!(0!==i||!o(s,t,n))||!(0!==c||!o(s,e,n)))))}function h(e,s){const n=[0,0],o=Math.round(s.hachureAngle+90);o&&t(e,n,o);const a=function(t,e){const s=[...t];s[0].join(",")!==s[s.length-1].join(",")&&s.push([s[0][0],s[0][1]]);const n=[];if(s&&s.length>2){let t=e.hachureGap;t<0&&(t=4*e.strokeWidth),t=Math.max(t,.1);const o=[];for(let t=0;t<s.length-1;t++){const e=s[t],n=s[t+1];if(e[1]!==n[1]){const t=Math.min(e[1],n[1]);o.push({ymin:t,ymax:Math.max(e[1],n[1]),x:t===e[1]?e[0]:n[0],islope:(n[0]-e[0])/(n[1]-e[1])})}}if(o.sort((t,e)=>t.ymin<e.ymin?-1:t.ymin>e.ymin?1:t.x<e.x?-1:t.x>e.x?1:t.ymax===e.ymax?0:(t.ymax-e.ymax)/Math.abs(t.ymax-e.ymax)),!o.length)return n;let a=[],r=o[0].ymin;for(;a.length||o.length;){if(o.length){let t=-1;for(let e=0;e<o.length&&!(o[e].ymin>r);e++)t=e;o.splice(0,t+1).forEach(t=>{a.push({s:r,edge:t})})}if(a=a.filter(t=>!(t.edge.ymax<=r)),a.sort((t,e)=>t.edge.x===e.edge.x?0:(t.edge.x-e.edge.x)/Math.abs(t.edge.x-e.edge.x)),a.length>1)for(let t=0;t<a.length;t+=2){const e=t+1;if(e>=a.length)break;const s=a[t].edge,o=a[e].edge;n.push([[Math.round(s.x),r],[Math.round(o.x),r]])}r+=t,a.forEach(e=>{e.edge.x=e.edge.x+t*e.edge.islope})}}return n}(e,s);return o&&(t(e,n,-o),function(e,s,n){const o=[];e.forEach(t=>o.push(...t)),t(o,s,n)}(a,n,-o)),a}class i{constructor(t){this.helper=t}fillPolygon(t,e){return this._fillPolygon(t,e)}_fillPolygon(t,e,s=!1){let n=h(t,e);if(s){const e=this.connectingLines(t,n);n=n.concat(e)}return{type:"fillSketch",ops:this.renderLines(n,e)}}renderLines(t,e){const s=[];for(const n of t)s.push(...this.helper.doubleLineOps(n[0][0],n[0][1],n[1][0],n[1][1],e));return s}connectingLines(t,s){const n=[];if(s.length>1)for(let o=1;o<s.length;o++){const a=s[o-1];if(e(a)<3)continue;const r=[s[o][0],a[1]];if(e(r)>3){const e=this.splitOnIntersections(t,r);n.push(...e)}}return n}midPointInPolygon(t,e){return n(t,(e[0][0]+e[1][0])/2,(e[0][1]+e[1][1])/2)}splitOnIntersections(t,o){const a=Math.max(5,.1*e(o)),h=[];for(let n=0;n<t.length;n++){const i=t[n],c=t[(n+1)%t.length];if(r(i,c,...o)){const t=s(i,c,o[0],o[1]);if(t){const s=e([t,o[0]]),n=e([t,o[1]]);s>a&&n>a&&h.push({point:t,distance:s})}}}if(h.length>1){const e=h.sort((t,e)=>t.distance-e.distance).map(t=>t.point);if(n(t,...o[0])||e.shift(),n(t,...o[1])||e.pop(),e.length<=1)return this.midPointInPolygon(t,o)?[o]:[];const s=[o[0],...e,o[1]],a=[];for(let e=0;e<s.length-1;e+=2){const n=[s[e],s[e+1]];this.midPointInPolygon(t,n)&&a.push(n)}return a}return this.midPointInPolygon(t,o)?[o]:[]}}class c extends i{fillPolygon(t,e){return this._fillPolygon(t,e,!0)}}class l extends i{fillPolygon(t,e){const s=this._fillPolygon(t,e),n=Object.assign({},e,{hachureAngle:e.hachureAngle+90}),o=this._fillPolygon(t,n);return s.ops=s.ops.concat(o.ops),s}}class u{constructor(t){this.helper=t}fillPolygon(t,e){const s=h(t,e=Object.assign({},e,{curveStepCount:4,hachureAngle:0,roughness:1}));return this.dotsOnLines(s,e)}dotsOnLines(t,s){const n=[];let o=s.hachureGap;o<0&&(o=4*s.strokeWidth),o=Math.max(o,.1);let a=s.fillWeight;a<0&&(a=s.strokeWidth/2);const r=o/4;for
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