diff --git a/dist/g2.chart.html.js b/dist/g2.chart.html.js
index 37750d3..d0fd86c 100644
--- a/dist/g2.chart.html.js
+++ b/dist/g2.chart.html.js
@@ -1425,7 +1425,8 @@ g2.labelIfc = {
         const font = lbl.font || g2.defaultStyle.font;
         const h = parseInt(font);   // font height (px assumed !)
         const str = this.getLabelString();
-        const rx = (str.length || 1) * 0.75 * h / 2, ry = 1.25 * h / 2;   // ellipse semi-axes length 
+        const rx = (str.length || 1) * 0.65 * h / 2, 
+              ry = 1.25 * h / 2;   // ellipse semi-axes length 
         const pos = this.pointAt(lbl.loc || this.lbloc || 'se');
         const off = this.getLabelOffset();
         const p = {
@@ -1478,7 +1479,7 @@ g2.markIfc = {
     }
 }
 
-g2.prototype.cir.prototype = g2.mix(g2.labelIfc, g2.markIfc, {
+g2.prototype.cir.prototype = g2.mix(g2.pointIfc, g2.labelIfc, g2.markIfc, {
     w: 0,   // default start angle (used for dash-dot orgin and editing)
     lbloc: 'c',
     get isSolid() { return this.fs && this.fs !== 'transparent' },
@@ -1646,9 +1647,9 @@ g2.prototype.hdl.prototype = g2.mix(g2.prototype.cir.prototype, {
     get lsh() { return this.state & g2.OVER; },
     get sh() { return this.state & g2.OVER ? [0, 0, 5, "black"] : false },
     g2() {
-        const { x, y, r, b = 4, shape = 'cir', ls = 'black', fs = '#ccc', sh } = this;
-        return shape === 'cir' ? g2().cir({ x, y, r, ls, fs, sh }).ins((g) => this.label && this.drawLabel(g))
-            : g2().rec({ x: x - b, y: y - b, b: 2 * b, h: 2 * b, ls, fs, sh }).ins((g) => this.label && this.drawLabel(g));
+        const { x, y, r, b = 4, ls = 'black', fs = 'palegreen', sh } = this;
+        
+        return g2().cir({ x, y, r, ls, fs, sh }).ins((g) => this.label && this.drawLabel(g));
     }
 });
 
diff --git a/dist/g2.full.js b/dist/g2.full.js
index fa2ef73..4c2282e 100644
--- a/dist/g2.full.js
+++ b/dist/g2.full.js
@@ -1334,7 +1334,8 @@ g2.labelIfc = {
         const font = lbl.font || g2.defaultStyle.font;
         const h = parseInt(font);   // font height (px assumed !)
         const str = this.getLabelString();
-        const rx = (str.length || 1) * 0.75 * h / 2, ry = 1.25 * h / 2;   // ellipse semi-axes length 
+        const rx = (str.length || 1) * 0.65 * h / 2, 
+              ry = 1.25 * h / 2;   // ellipse semi-axes length 
         const pos = this.pointAt(lbl.loc || this.lbloc || 'se');
         const off = this.getLabelOffset();
         const p = {
@@ -1387,7 +1388,7 @@ g2.markIfc = {
     }
 }
 
-g2.prototype.cir.prototype = g2.mix(g2.labelIfc, g2.markIfc, {
+g2.prototype.cir.prototype = g2.mix(g2.pointIfc, g2.labelIfc, g2.markIfc, {
     w: 0,   // default start angle (used for dash-dot orgin and editing)
     lbloc: 'c',
     get isSolid() { return this.fs && this.fs !== 'transparent' },
@@ -1555,9 +1556,9 @@ g2.prototype.hdl.prototype = g2.mix(g2.prototype.cir.prototype, {
     get lsh() { return this.state & g2.OVER; },
     get sh() { return this.state & g2.OVER ? [0, 0, 5, "black"] : false },
     g2() {
-        const { x, y, r, b = 4, shape = 'cir', ls = 'black', fs = '#ccc', sh } = this;
-        return shape === 'cir' ? g2().cir({ x, y, r, ls, fs, sh }).ins((g) => this.label && this.drawLabel(g))
-            : g2().rec({ x: x - b, y: y - b, b: 2 * b, h: 2 * b, ls, fs, sh }).ins((g) => this.label && this.drawLabel(g));
+        const { x, y, r, b = 4, ls = 'black', fs = 'palegreen', sh } = this;
+        
+        return g2().cir({ x, y, r, ls, fs, sh }).ins((g) => this.label && this.drawLabel(g));
     }
 });
 
diff --git a/dist/g2.js b/dist/g2.js
index ac5e5eb..c52eaac 100644
--- a/dist/g2.js
+++ b/dist/g2.js
@@ -30,7 +30,7 @@
  * @typedef {g2}
  * @description Additional methods for g2.
  * @returns {g2}
- */var g2=g2||{prototype:{}};g2.NONE=0;g2.OVER=1;g2.DRAG=2;g2.EDIT=4;g2.symbol=g2.symbol||{};g2.symbol.tick=g2().p().m({x:0,y:-2}).l({x:0,y:2}).stroke({lc:"round",lwnosc:true});g2.symbol.dot=g2().cir({x:0,y:0,r:2,ls:"transparent"});g2.symbol.sqr=g2().rec({x:-1.5,y:-1.5,b:3,h:3,ls:"transparent"});g2.symbol.nodcolor="#333";g2.symbol.nodfill="#dedede";g2.symbol.nodfill2="#aeaeae";g2.symbol.linkcolor="#666";g2.symbol.linkfill="rgba(225,225,225,0.75)";g2.symbol.dimcolor="darkslategray";g2.symbol.solid=[];g2.symbol.dash=[15,10];g2.symbol.dot=[4,4];g2.symbol.dashdot=[25,6.5,2,6.5];g2.symbol.labelSignificantDigits=3;g2.flatten=function(obj){const args=Object.create(null);for(let p in obj)if(typeof obj[p]!=="function")args[p]=obj[p];return args};g2.pointIfc={get p(){return{x:this.x,y:this.y}},get x(){return Object.getOwnPropertyDescriptor(this,"p")?this.p.x:0},get y(){return Object.getOwnPropertyDescriptor(this,"p")?this.p.y:0},set x(q){if(Object.getOwnPropertyDescriptor(this,"p"))this.p.x=q},set y(q){if(Object.getOwnPropertyDescriptor(this,"p"))this.p.y=q}};g2.labelIfc={getLabelOffset(){const off=this.label.off!==undefined?+this.label.off:1;return off+Math.sign(off)*(this.lw||2)/2},getLabelString(){let s=typeof this.label==="object"?this.label.str:typeof this.label==="string"?this.label:"?";if(s&&s[0]==="@"&&this[s.substr(1)]){s=s.substr(1);let val=this[s];val=Number.isInteger(val)?val:Number(val).toFixed(Math.max(g2.symbol.labelSignificantDigits-Math.log10(val),0));s=`${val}${s==="angle"?"°":""}`}return s},drawLabel(g){const lbl=this.label;const font=lbl.font||g2.defaultStyle.font;const h=parseInt(font);const str=this.getLabelString();const rx=(str.length||1)*.75*h/2,ry=1.25*h/2;const pos=this.pointAt(lbl.loc||this.lbloc||"se");const off=this.getLabelOffset();const p={x:pos.x+pos.nx*(off+Math.sign(off)*rx),y:pos.y+pos.ny*(off+Math.sign(off)*ry)};if(lbl.border)g.ell({x:p.x,y:p.y,rx:rx,ry:ry,ls:lbl.fs||"black",fs:lbl.fs2||"#ffc"});g.txt({str:str,x:p.x,y:p.y,thal:"center",tval:"middle",fs:lbl.fs||"black",font:lbl.font});return g}};g2.markIfc={markAt(loc){const p=this.pointAt(loc);const w=Math.atan2(p.ny,p.nx)+Math.PI/2;return{grp:this.getMarkSymbol(),x:p.x,y:p.y,w:w,scl:this.lw||1,ls:this.ls||"#000",fs:this.fs||this.ls||"#000"}},getMarkSymbol(){const mrk=this.mark;if(typeof mrk==="number"||!mrk)return g2.symbol.tick;if(typeof mrk.symbol==="object")return mrk.symbol;if(typeof mrk.symbol==="string")return g2.symbol[mrk.symbol]},drawMark(g,closed=false){let loc;if(Array.isArray(this.mark)){loc=this.mark}else{const count=typeof this.mark==="object"?this.mark.count:this.mark;loc=count?Array.from(Array(count)).map((_,i)=>i/(count-!closed)):this.mark.loc}for(let l of loc){g.use(this.markAt(l))}return g}};g2.prototype.cir.prototype=g2.mix(g2.pointIfc,g2.labelIfc,g2.markIfc,{w:0,lbloc:"c",get isSolid(){return this.fs&&this.fs!=="transparent"},get len(){return 2*Math.PI*this.r},get lsh(){return this.state&g2.OVER},get sh(){return this.state&g2.OVER?[0,0,5,"black"]:false},get g2(){const e=g2();this.label&&e.ins(g=>this.drawLabel(g));this.mark&&e.ins(g=>this.drawMark(g,true));return()=>g2().cir(g2.flatten(this)).ins(e)},pointAt(loc){const Q=Math.SQRT2/2;const LOC={c:[0,0],e:[1,0],ne:[Q,Q],n:[0,1],nw:[-Q,Q],w:[-1,0],sw:[-Q,-Q],s:[0,-1],se:[Q,-Q]};const q=loc+0===loc?[Math.cos(loc*2*Math.PI),Math.sin(loc*2*Math.PI)]:LOC[loc||"c"]||[0,0];return{x:this.x+q[0]*this.r,y:this.y+q[1]*this.r,nx:q[0],ny:q[1]}},hit({x:x,y:y,eps:eps}){return this.isSolid?g2.isPntInCir({x:x,y:y},this,eps):g2.isPntOnCir({x:x,y:y},this,eps)},drag({dx:dx,dy:dy}){this.x+=dx;this.y+=dy}});g2.prototype.lin.prototype=g2.mix(g2.labelIfc,g2.markIfc,{get p1(){return{x1:this.x1,y1:this.y1}},get x1(){return Object.getOwnPropertyDescriptor(this,"p1")?this.p1.x:0},get y1(){return Object.getOwnPropertyDescriptor(this,"p1")?this.p1.y:0},set x1(q){if(Object.getOwnPropertyDescriptor(this,"p1"))this.p1.x=q},set y1(q){if(Object.getOwnPropertyDescriptor(this,"p1"))this.p1.y=q},get p2(){return{x2:this.x2,y2:this.y2}},get x2(){return Object.getOwnPropertyDescriptor(this,"p2")?this.p2.x:0},get y2(){return Object.getOwnPropertyDescriptor(this,"p2")?this.p2.y:0},set x2(q){if(Object.getOwnPropertyDescriptor(this,"p2"))this.p2.x=q},set y2(q){if(Object.getOwnPropertyDescriptor(this,"p2"))this.p2.y=q},isSolid:false,get len(){return Math.hypot(this.x2-this.x1,this.y2-this.y1)},get sh(){return this.state&g2.OVER?[0,0,5,"black"]:false},get g2(){const e=g2();this.label&&e.ins(e=>this.drawLabel(e));this.mark&&e.ins(e=>this.drawMark(e));return()=>g2().lin(g2.flatten(this)).ins(e)},pointAt(loc){let t=loc==="beg"?0:loc==="end"?1:loc+0===loc?loc:.5,dx=this.x2-this.x1,dy=this.y2-this.y1,len=Math.hypot(dx,dy);return{x:this.x1+dx*t,y:this.y1+dy*t,nx:len?dy/len:0,ny:len?-dx/len:-1}},hit({x:x,y:y,eps:eps}){return g2.isPntOnLin({x:x,y:y},{x:this.x1,y:this.y1},{x:this.x2,y:this.y2},eps)},drag({dx:dx,dy:dy}){this.x1+=dx;this.x2+=dx;this.y1+=dy;this.y2+=dy}});g2.prototype.rec.prototype=g2.mix(g2.pointIfc,g2.labelIfc,g2.markIfc,{get len(){return 2*(this.b+this.h)},get isSolid(){return this.fs&&this.fs!=="transparent"},get lsh(){return this.state&g2.OVER},get sh(){return this.state&g2.OVER?[0,0,5,"black"]:false},get g2(){const e=g2();this.label&&e.ins(e=>this.drawLabel(e));this.mark&&e.ins(e=>this.drawMark(e,true));return()=>g2().rec(g2.flatten(this)).ins(e)},lbloc:"c",pointAt(loc){const locAt=loc=>{const o={c:[0,0],e:[1,0],ne:[.95,.95],n:[0,1],nw:[-.95,.95],w:[-1,0],sw:[-.95,-.95],s:[0,-1],se:[.95,-.95]};if(o[loc])return o[loc];const w=2*Math.PI*loc+pi/4;if(loc<=.25)return[1/Math.tan(w),1];if(loc<=.5)return[-1,-Math.tan(w)];if(loc<=.75)return[-1/Math.tan(w),-1];if(loc<=1)return[1,Math.tan(w)]};const q=locAt(loc);return{x:this.x+(1+q[0])*this.b/2,y:this.y+(1+q[1])*this.h/2,nx:1-Math.abs(q[0])<.01?q[0]:0,ny:1-Math.abs(q[1])<.01?q[1]:0}},hit({x:x,y:y,eps:eps}){return this.isSolid?g2.isPntInBox({x:x,y:y},{x:this.x+this.b/2,y:this.y+this.h/2,b:this.b/2,h:this.h/2},eps):g2.isPntOnBox({x:x,y:y},{x:this.x+this.b/2,y:this.y+this.h/2,b:this.b/2,h:this.h/2},eps)},drag({dx:dx,dy:dy}){this.x+=dx;this.y+=dy}});g2.prototype.arc.prototype=g2.mix(g2.pointIfc,g2.labelIfc,g2.markIfc,{get len(){return Math.abs(this.r*this.dw)},isSolid:false,get angle(){return this.dw/Math.PI*180},get sh(){return this.state&g2.OVER?[0,0,5,"black"]:false},get g2(){const e=g2();this.label&&e.ins(e=>this.drawLabel(e));this.mark&&e.ins(e=>this.drawMark(e));return()=>g2().arc(g2.flatten(this)).ins(e)},lbloc:"mid",pointAt(loc){let t=loc==="beg"?0:loc==="end"?1:loc==="mid"?.5:loc+0===loc?loc:.5,ang=(this.w||0)+t*(this.dw||Math.PI*2),cang=Math.cos(ang),sang=Math.sin(ang),r=loc==="c"?0:this.r;return{x:this.x+r*cang,y:this.y+r*sang,nx:cang,ny:sang}},hit({x:x,y:y,eps:eps}){return g2.isPntOnArc({x:x,y:y},this,eps)},drag({dx:dx,dy:dy}){this.x+=dx;this.y+=dy}});g2.prototype.hdl=function(args){return this.addCommand({c:"hdl",a:args})};g2.prototype.hdl.prototype=g2.mix(g2.prototype.cir.prototype,{r:5,isSolid:true,draggable:true,lbloc:"se",get lsh(){return this.state&g2.OVER},get sh(){return this.state&g2.OVER?[0,0,5,"black"]:false},g2(){const{x:x,y:y,r:r,b:b=4,shape:shape="cir",ls:ls="black",fs:fs="#ccc",sh:sh}=this;return shape==="cir"?g2().cir({x:x,y:y,r:r,ls:ls,fs:fs,sh:sh}).ins(g=>this.label&&this.drawLabel(g)):g2().rec({x:x-b,y:y-b,b:2*b,h:2*b,ls:ls,fs:fs,sh:sh}).ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.nod=function(args={}){return this.addCommand({c:"nod",a:args})};g2.prototype.nod.prototype=g2.mix(g2.prototype.cir.prototype,{r:5,ls:"@nodcolor",fs:g2.symbol.nodfill,isSolid:true,lbloc:"se",g2(){return g2().cir({...g2.flatten(this),r:this.r*(this.scl!==undefined?this.scl:1)}).ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.dblnod=function({x:x=0,y:y=0}){return this.addCommand({c:"dblnod",a:arguments[0]})};g2.prototype.dblnod.prototype=g2.mix(g2.prototype.cir.prototype,{r:6,isSolid:true,g2(){return g2().beg({x:this.x,y:this.y}).cir({r:6,ls:"@nodcolor",fs:"@nodfill",sh:this.sh}).cir({r:3,ls:"@nodcolor",fs:"@nodfill2"}).end().ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.pol=function(args={}){return this.addCommand({c:"pol",a:args})};g2.prototype.pol.prototype=g2.mix(g2.prototype.nod.prototype,{g2(){return g2().beg(g2.flatten(this)).cir({r:6,fs:"@fs2"}).cir({r:2.5,fs:"@ls",ls:"transparent"}).end().ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.gnd=function(args={}){return this.addCommand({c:"gnd",a:args})};g2.prototype.gnd.prototype=g2.mix(g2.prototype.nod.prototype,{g2(){return g2().beg(g2.flatten(this)).cir({x:0,y:0,r:6}).p().m({x:0,y:6}).a({dw:Math.PI/2,x:-6,y:0}).l({x:6,y:0}).a({dw:-Math.PI/2,x:0,y:-6}).z().fill({fs:g2.symbol.nodcolor}).end().ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.nodfix=function(args={}){return this.addCommand({c:"nodfix",a:args})};g2.prototype.nodfix.prototype=g2.mix(g2.prototype.nod.prototype,{g2(){return g2().beg(g2.flatten(this)).p().m({x:-8,y:-12}).l({x:0,y:0}).l({x:8,y:-12}).drw({fs:g2.symbol.nodfill2}).cir({x:0,y:0,r:this.r}).end().ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.nodflt=function(args={}){return this.addCommand({c:"nodflt",a:args})};g2.prototype.nodflt.prototype=g2.mix(g2.prototype.nod.prototype,{g2(){return g2().beg(g2.flatten(this)).p().m({x:-8,y:-12}).l({x:0,y:0}).l({x:8,y:-12}).drw({ls:g2.symbol.nodcolor,fs:g2.symbol.nodfill2}).cir({x:0,y:0,r:this.r,ls:g2.symbol.nodcolor,fs:g2.symbol.nodfill}).lin({x1:-9,y1:-19,x2:9,y2:-19,ls:g2.symbol.nodfill2,lw:5}).lin({x1:-9,y1:-15.5,x2:9,y2:-15.5,ls:g2.symbol.nodcolor,lw:2}).end().ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.vec=function vec(args){return this.addCommand({c:"vec",a:args})};g2.prototype.vec.prototype=g2.mix(g2.prototype.lin.prototype,{g2(){const{x1:x1,y1:y1,x2:x2,y2:y2,lw:lw=1,ls:ls="#000",ld:ld=[],fs:fs=ls||"#000",lc:lc="round",lj:lj="round"}=this;const dx=x2-x1,dy=y2-y1,r=Math.hypot(dx,dy);const b=3*(1+lw)>r?r/3:1+lw;const arrowHead=()=>g2().p().m({x:0,y:0}).l({x:-5*b,y:b}).a({dw:-Math.PI/3,x:-5*b,y:-b}).z().drw({ls:ls,fs:fs,lc:lc,lj:lj});return g2().beg({x:x1,y:y1,w:Math.atan2(dy,dx),lc:lc,lj:lj}).p().m({x:0,y:0}).l({x:r-3*b,y:0}).stroke({ls:ls,lw:lw,ld:ld}).use({grp:arrowHead,x:r,y:0}).end().ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.avec=function avec(args){return this.addCommand({c:"avec",a:args})};g2.prototype.avec.prototype=g2.mix(g2.prototype.arc.prototype,{g2(){const{x:x,y:y,r:r,w:w,dw:dw=0,lw:lw=1,lc:lc="round",lj:lj="round",ls:ls,fs:fs=ls||"#000",label:label}=this;const b=3*(1+lw)>r?r/3:1+lw,bw=5*b/r;const arrowHead=()=>g2().p().m({x:0,y:2*b}).l({x:0,y:-2*b}).m({x:0,y:0}).l({x:-5*b,y:b}).a({dw:-Math.PI/3,x:-5*b,y:-b}).z().drw({ls:ls,fs:fs});return g2().beg({x:x,y:y,w:w,ls:ls,lw:lw,lc:lc,lj:lj}).arc({r:r,w:0,dw:dw}).use({grp:arrowHead,x:r*Math.cos(dw),y:r*Math.sin(dw),w:dw>=0?dw+Math.PI/2-bw/2:dw-Math.PI/2+bw/2}).end().ins(g=>label&&this.drawLabel(g))}});g2.prototype.dim=function dim(args){return this.addCommand({c:"dim",a:args})};g2.prototype.dim.prototype=g2.mix(g2.prototype.lin.prototype,{pointAt(loc){const pnt=g2.prototype.lin.prototype.pointAt.call(this,loc);if(this.off){pnt.x+=this.off*pnt.nx;pnt.y+=this.off*pnt.ny}return pnt},g2(){const{x1:x1,y1:y1,x2:x2,y2:y2,lw:lw=1,lc:lc="round",lj:lj="round",off:off=0,inside:inside=true,ls:ls,fs:fs=ls||"#000",label:label}=this;const dx=x2-x1,dy=y2-y1,r=Math.hypot(dx,dy);const b=3*(1+lw)>r?r/3:1+lw;const arrowHead=()=>g2().p().m({x:0,y:2*b}).l({x:0,y:-2*b}).m({x:0,y:0}).l({x:-5*b,y:b}).a({dw:-Math.PI/3,x:-5*b,y:-b}).z().drw({ls:ls,fs:fs});return g2().beg({x:x1+off/r*dy,y:y1-off/r*dx,w:Math.atan2(dy,dx),ls:ls,fs:fs,lw:lw,lc:lc,lj:lj}).lin({x1:inside?4*b:0,y1:0,x2:inside?r-4*b:r,y2:0}).use({grp:arrowHead,x:r,y:0,w:inside?0:Math.PI}).use({grp:arrowHead,x:0,y:0,w:inside?Math.PI:0}).lin({x1:0,y1:off,x2:0,y2:0}).lin({x1:r,y1:off,x2:r,y2:0}).end().ins(g=>label&&this.drawLabel(g))}});g2.prototype.adim=function adim(args){return this.addCommand({c:"adim",a:args})};g2.prototype.adim.prototype=g2.mix(g2.prototype.arc.prototype,{g2(){const{x:x,y:y,r:r,w:w,dw:dw,lw:lw=1,lc:lc="round",lj:lj="round",ls:ls,fs:fs=ls||"#000",label:label}=this;const b=3*(1+lw)>r?r/3:1+lw,bw=5*b/r;const arrowHead=()=>g2().p().m({x:0,y:2*b}).l({x:0,y:-2*b}).m({x:0,y:0}).l({x:-5*b,y:b}).a({dw:-Math.PI/3,x:-5*b,y:-b}).z().drw({ls:ls,fs:fs});const outside=this.inside!==undefined&&this.outside===undefined?!this.inside:!!this.outside;return g2().beg({x:x,y:y,w:w,ls:ls,lw:lw,lc:lc,lj:lj}).arc({r:r,w:0,dw:dw}).use({grp:arrowHead,x:r,y:0,w:!outside&&dw>0||outside&&dw<0?-Math.PI/2+bw/2:Math.PI/2-bw/2}).use({grp:arrowHead,x:r*Math.cos(dw),y:r*Math.sin(dw),w:!outside&&dw>0||outside&&dw<0?dw+Math.PI/2-bw/2:dw-Math.PI/2+bw/2}).end().ins(g=>label&&this.drawLabel(g))}});g2.prototype.origin=function(args={}){return this.addCommand({c:"origin",a:args})};g2.prototype.origin.prototype=g2.mix(g2.prototype.nod.prototype,{lbloc:"sw",g2(){const{x:x,y:y,w:w,ls:ls="#000",lw:lw=1}=this;return g2().beg({x:x,y:y,w:w,ls:ls}).vec({x1:0,y1:0,x2:40,y2:0,lw:lw,fs:"#ccc"}).vec({x1:0,y1:0,x2:0,y2:40,lw:lw,fs:"#ccc"}).cir({x:0,y:0,r:lw+1,fs:"#ccc"}).end().ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.ply.prototype=g2.mix(g2.labelIfc,g2.markIfc,{get isSolid(){return this.closed&&this.fs&&this.fs!=="transparent"},get sh(){return this.state&g2.OVER?[0,0,5,"black"]:false},pointAt(loc){const t=loc==="beg"?0:loc==="end"?1:loc+0===loc?loc:.5,pitr=g2.pntItrOf(this.pts),pts=[],len=[];for(let itr=0;itr<pitr.len;itr++){const next=pitr((itr+1)%pitr.len);pts.push(pitr(itr));len.push(Math.hypot(next.x-pitr(itr).x,next.y-pitr(itr).y))}this.closed||len.pop();const{t2:t2,x:x,y:y,dx:dx,dy:dy}=(()=>{const target=t*len.reduce((a,b)=>a+b);for(let itr=0,tmp=0;itr<pts.length;itr++){tmp+=len[itr];const next=pitr(itr+1).x?pitr(itr+1):pitr(0);if(tmp>=target){return{t2:1-(tmp-target)/len[itr],x:pts[itr].x,y:pts[itr].y,dx:next.x-pts[itr].x,dy:next.y-pts[itr].y}}}})();const len2=Math.hypot(dx,dy);return{x:(this.x||0)+x+dx*t2,y:(this.y||0)+y+dy*t2,nx:len2?dy/len2:1,ny:len2?dx/len2:0}},hit({x:x,y:y,eps:eps}){return this.isSolid?g2.isPntInPly({x:x-this.x,y:y-this.y},this,eps):g2.isPntOnPly({x:x-this.x,y:y-this.y},this,eps)},drag({dx:dx,dy:dy}){this.x+=dx;this.y+=dy},get g2(){const e=g2();this.label&&e.ins(e=>this.drawLabel(e));this.mark&&e.ins(e=>this.drawMark(e,this.closed));return()=>g2().ply(g2.flatten(this)).ins(e)}});g2.prototype.use.prototype={get p(){return{x:this.x,y:this.y}},get x(){return Object.getOwnPropertyDescriptor(this,"p")?this.p.x:0},get y(){return Object.getOwnPropertyDescriptor(this,"p")?this.p.y:0},set x(q){if(Object.getOwnPropertyDescriptor(this,"p"))this.p.x=q},set y(q){if(Object.getOwnPropertyDescriptor(this,"p"))this.p.y=q},isSolid:false};g2.prototype.spline=function spline({pts:pts,closed:closed,x:x,y:y,w:w}){arguments[0]._itr=g2.pntItrOf(pts);return this.addCommand({c:"spline",a:arguments[0]})};g2.prototype.spline.prototype=g2.mix(g2.prototype.ply.prototype,{g2:function(){let{pts:pts,closed:closed,x:x,y:y,w:w,ls:ls,lw:lw,fs:fs,sh:sh}=this,itr=this._itr,gbez;if(itr){let b=[],i,n=itr.len,p1,p2,p3,p4,d1,d2,d3,d1d2,d2d3,scl2,scl3,den2,den3,istrf=x||y||w;gbez=g2();if(istrf)gbez.beg({x:x,y:y,w:w});gbez.p().m(itr(0));for(let i=0;i<(closed?n:n-1);i++){if(i===0){p1=closed?itr(n-1):{x:2*itr(0).x-itr(1).x,y:2*itr(0).y-itr(1).y};p2=itr(0);p3=itr(1);p4=n===2?closed?itr(0):{x:2*itr(1).x-itr(0).x,y:2*itr(1).y-itr(0).y}:itr(2);d1=Math.max(Math.hypot(p2.x-p1.x,p2.y-p1.y),Number.EPSILON);d2=Math.max(Math.hypot(p3.x-p2.x,p3.y-p2.y),Number.EPSILON)}else{p1=p2;p2=p3;p3=p4;p4=i===n-2?closed?itr(0):{x:2*itr(n-1).x-itr(n-2).x,y:2*itr(n-1).y-itr(n-2).y}:i===n-1?itr(1):itr(i+2);d1=d2;d2=d3}d3=Math.max(Math.hypot(p4.x-p3.x,p4.y-p3.y),Number.EPSILON);d1d2=Math.sqrt(d1*d2),d2d3=Math.sqrt(d2*d3),scl2=2*d1+3*d1d2+d2,scl3=2*d3+3*d2d3+d2,den2=3*(d1+d1d2),den3=3*(d3+d2d3);gbez.c({x:p3.x,y:p3.y,x1:(-d2*p1.x+scl2*p2.x+d1*p3.x)/den2,y1:(-d2*p1.y+scl2*p2.y+d1*p3.y)/den2,x2:(-d2*p4.x+scl3*p3.x+d3*p2.x)/den3,y2:(-d2*p4.y+scl3*p3.y+d3*p2.y)/den3})}gbez.c(closed?{x:itr(0).x,y:itr(0).y}:{x:itr(n-1).x,y:itr(n-1).y});if(closed)gbez.z();gbez.drw({ls:ls,lw:lw,fs:fs,sh:sh});if(istrf)gbez.end()}return gbez}});"use strict";
+ */var g2=g2||{prototype:{}};g2.NONE=0;g2.OVER=1;g2.DRAG=2;g2.EDIT=4;g2.symbol=g2.symbol||{};g2.symbol.tick=g2().p().m({x:0,y:-2}).l({x:0,y:2}).stroke({lc:"round",lwnosc:true});g2.symbol.dot=g2().cir({x:0,y:0,r:2,ls:"transparent"});g2.symbol.sqr=g2().rec({x:-1.5,y:-1.5,b:3,h:3,ls:"transparent"});g2.symbol.nodcolor="#333";g2.symbol.nodfill="#dedede";g2.symbol.nodfill2="#aeaeae";g2.symbol.linkcolor="#666";g2.symbol.linkfill="rgba(225,225,225,0.75)";g2.symbol.dimcolor="darkslategray";g2.symbol.solid=[];g2.symbol.dash=[15,10];g2.symbol.dot=[4,4];g2.symbol.dashdot=[25,6.5,2,6.5];g2.symbol.labelSignificantDigits=3;g2.flatten=function(obj){const args=Object.create(null);for(let p in obj)if(typeof obj[p]!=="function")args[p]=obj[p];return args};g2.pointIfc={get p(){return{x:this.x,y:this.y}},get x(){return Object.getOwnPropertyDescriptor(this,"p")?this.p.x:0},get y(){return Object.getOwnPropertyDescriptor(this,"p")?this.p.y:0},set x(q){if(Object.getOwnPropertyDescriptor(this,"p"))this.p.x=q},set y(q){if(Object.getOwnPropertyDescriptor(this,"p"))this.p.y=q}};g2.labelIfc={getLabelOffset(){const off=this.label.off!==undefined?+this.label.off:1;return off+Math.sign(off)*(this.lw||2)/2},getLabelString(){let s=typeof this.label==="object"?this.label.str:typeof this.label==="string"?this.label:"?";if(s&&s[0]==="@"&&this[s.substr(1)]){s=s.substr(1);let val=this[s];val=Number.isInteger(val)?val:Number(val).toFixed(Math.max(g2.symbol.labelSignificantDigits-Math.log10(val),0));s=`${val}${s==="angle"?"°":""}`}return s},drawLabel(g){const lbl=this.label;const font=lbl.font||g2.defaultStyle.font;const h=parseInt(font);const str=this.getLabelString();const rx=(str.length||1)*.65*h/2,ry=1.25*h/2;const pos=this.pointAt(lbl.loc||this.lbloc||"se");const off=this.getLabelOffset();const p={x:pos.x+pos.nx*(off+Math.sign(off)*rx),y:pos.y+pos.ny*(off+Math.sign(off)*ry)};if(lbl.border)g.ell({x:p.x,y:p.y,rx:rx,ry:ry,ls:lbl.fs||"black",fs:lbl.fs2||"#ffc"});g.txt({str:str,x:p.x,y:p.y,thal:"center",tval:"middle",fs:lbl.fs||"black",font:lbl.font});return g}};g2.markIfc={markAt(loc){const p=this.pointAt(loc);const w=Math.atan2(p.ny,p.nx)+Math.PI/2;return{grp:this.getMarkSymbol(),x:p.x,y:p.y,w:w,scl:this.lw||1,ls:this.ls||"#000",fs:this.fs||this.ls||"#000"}},getMarkSymbol(){const mrk=this.mark;if(typeof mrk==="number"||!mrk)return g2.symbol.tick;if(typeof mrk.symbol==="object")return mrk.symbol;if(typeof mrk.symbol==="string")return g2.symbol[mrk.symbol]},drawMark(g,closed=false){let loc;if(Array.isArray(this.mark)){loc=this.mark}else{const count=typeof this.mark==="object"?this.mark.count:this.mark;loc=count?Array.from(Array(count)).map((_,i)=>i/(count-!closed)):this.mark.loc}for(let l of loc){g.use(this.markAt(l))}return g}};g2.prototype.cir.prototype=g2.mix(g2.pointIfc,g2.labelIfc,g2.markIfc,{w:0,lbloc:"c",get isSolid(){return this.fs&&this.fs!=="transparent"},get len(){return 2*Math.PI*this.r},get lsh(){return this.state&g2.OVER},get sh(){return this.state&g2.OVER?[0,0,5,"black"]:false},get g2(){const e=g2();this.label&&e.ins(g=>this.drawLabel(g));this.mark&&e.ins(g=>this.drawMark(g,true));return()=>g2().cir(g2.flatten(this)).ins(e)},pointAt(loc){const Q=Math.SQRT2/2;const LOC={c:[0,0],e:[1,0],ne:[Q,Q],n:[0,1],nw:[-Q,Q],w:[-1,0],sw:[-Q,-Q],s:[0,-1],se:[Q,-Q]};const q=loc+0===loc?[Math.cos(loc*2*Math.PI),Math.sin(loc*2*Math.PI)]:LOC[loc||"c"]||[0,0];return{x:this.x+q[0]*this.r,y:this.y+q[1]*this.r,nx:q[0],ny:q[1]}},hit({x:x,y:y,eps:eps}){return this.isSolid?g2.isPntInCir({x:x,y:y},this,eps):g2.isPntOnCir({x:x,y:y},this,eps)},drag({dx:dx,dy:dy}){this.x+=dx;this.y+=dy}});g2.prototype.lin.prototype=g2.mix(g2.labelIfc,g2.markIfc,{get p1(){return{x1:this.x1,y1:this.y1}},get x1(){return Object.getOwnPropertyDescriptor(this,"p1")?this.p1.x:0},get y1(){return Object.getOwnPropertyDescriptor(this,"p1")?this.p1.y:0},set x1(q){if(Object.getOwnPropertyDescriptor(this,"p1"))this.p1.x=q},set y1(q){if(Object.getOwnPropertyDescriptor(this,"p1"))this.p1.y=q},get p2(){return{x2:this.x2,y2:this.y2}},get x2(){return Object.getOwnPropertyDescriptor(this,"p2")?this.p2.x:0},get y2(){return Object.getOwnPropertyDescriptor(this,"p2")?this.p2.y:0},set x2(q){if(Object.getOwnPropertyDescriptor(this,"p2"))this.p2.x=q},set y2(q){if(Object.getOwnPropertyDescriptor(this,"p2"))this.p2.y=q},isSolid:false,get len(){return Math.hypot(this.x2-this.x1,this.y2-this.y1)},get sh(){return this.state&g2.OVER?[0,0,5,"black"]:false},get g2(){const e=g2();this.label&&e.ins(e=>this.drawLabel(e));this.mark&&e.ins(e=>this.drawMark(e));return()=>g2().lin(g2.flatten(this)).ins(e)},pointAt(loc){let t=loc==="beg"?0:loc==="end"?1:loc+0===loc?loc:.5,dx=this.x2-this.x1,dy=this.y2-this.y1,len=Math.hypot(dx,dy);return{x:this.x1+dx*t,y:this.y1+dy*t,nx:len?dy/len:0,ny:len?-dx/len:-1}},hit({x:x,y:y,eps:eps}){return g2.isPntOnLin({x:x,y:y},{x:this.x1,y:this.y1},{x:this.x2,y:this.y2},eps)},drag({dx:dx,dy:dy}){this.x1+=dx;this.x2+=dx;this.y1+=dy;this.y2+=dy}});g2.prototype.rec.prototype=g2.mix(g2.pointIfc,g2.labelIfc,g2.markIfc,{get len(){return 2*(this.b+this.h)},get isSolid(){return this.fs&&this.fs!=="transparent"},get lsh(){return this.state&g2.OVER},get sh(){return this.state&g2.OVER?[0,0,5,"black"]:false},get g2(){const e=g2();this.label&&e.ins(e=>this.drawLabel(e));this.mark&&e.ins(e=>this.drawMark(e,true));return()=>g2().rec(g2.flatten(this)).ins(e)},lbloc:"c",pointAt(loc){const locAt=loc=>{const o={c:[0,0],e:[1,0],ne:[.95,.95],n:[0,1],nw:[-.95,.95],w:[-1,0],sw:[-.95,-.95],s:[0,-1],se:[.95,-.95]};if(o[loc])return o[loc];const w=2*Math.PI*loc+pi/4;if(loc<=.25)return[1/Math.tan(w),1];if(loc<=.5)return[-1,-Math.tan(w)];if(loc<=.75)return[-1/Math.tan(w),-1];if(loc<=1)return[1,Math.tan(w)]};const q=locAt(loc);return{x:this.x+(1+q[0])*this.b/2,y:this.y+(1+q[1])*this.h/2,nx:1-Math.abs(q[0])<.01?q[0]:0,ny:1-Math.abs(q[1])<.01?q[1]:0}},hit({x:x,y:y,eps:eps}){return this.isSolid?g2.isPntInBox({x:x,y:y},{x:this.x+this.b/2,y:this.y+this.h/2,b:this.b/2,h:this.h/2},eps):g2.isPntOnBox({x:x,y:y},{x:this.x+this.b/2,y:this.y+this.h/2,b:this.b/2,h:this.h/2},eps)},drag({dx:dx,dy:dy}){this.x+=dx;this.y+=dy}});g2.prototype.arc.prototype=g2.mix(g2.pointIfc,g2.labelIfc,g2.markIfc,{get len(){return Math.abs(this.r*this.dw)},isSolid:false,get angle(){return this.dw/Math.PI*180},get sh(){return this.state&g2.OVER?[0,0,5,"black"]:false},get g2(){const e=g2();this.label&&e.ins(e=>this.drawLabel(e));this.mark&&e.ins(e=>this.drawMark(e));return()=>g2().arc(g2.flatten(this)).ins(e)},lbloc:"mid",pointAt(loc){let t=loc==="beg"?0:loc==="end"?1:loc==="mid"?.5:loc+0===loc?loc:.5,ang=(this.w||0)+t*(this.dw||Math.PI*2),cang=Math.cos(ang),sang=Math.sin(ang),r=loc==="c"?0:this.r;return{x:this.x+r*cang,y:this.y+r*sang,nx:cang,ny:sang}},hit({x:x,y:y,eps:eps}){return g2.isPntOnArc({x:x,y:y},this,eps)},drag({dx:dx,dy:dy}){this.x+=dx;this.y+=dy}});g2.prototype.hdl=function(args){return this.addCommand({c:"hdl",a:args})};g2.prototype.hdl.prototype=g2.mix(g2.prototype.cir.prototype,{r:5,isSolid:true,draggable:true,lbloc:"se",get lsh(){return this.state&g2.OVER},get sh(){return this.state&g2.OVER?[0,0,5,"black"]:false},g2(){const{x:x,y:y,r:r,b:b=4,ls:ls="black",fs:fs="palegreen",sh:sh}=this;return g2().cir({x:x,y:y,r:r,ls:ls,fs:fs,sh:sh}).ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.nod=function(args={}){return this.addCommand({c:"nod",a:args})};g2.prototype.nod.prototype=g2.mix(g2.prototype.cir.prototype,{r:5,ls:"@nodcolor",fs:g2.symbol.nodfill,isSolid:true,lbloc:"se",g2(){return g2().cir({...g2.flatten(this),r:this.r*(this.scl!==undefined?this.scl:1)}).ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.dblnod=function({x:x=0,y:y=0}){return this.addCommand({c:"dblnod",a:arguments[0]})};g2.prototype.dblnod.prototype=g2.mix(g2.prototype.cir.prototype,{r:6,isSolid:true,g2(){return g2().beg({x:this.x,y:this.y}).cir({r:6,ls:"@nodcolor",fs:"@nodfill",sh:this.sh}).cir({r:3,ls:"@nodcolor",fs:"@nodfill2"}).end().ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.pol=function(args={}){return this.addCommand({c:"pol",a:args})};g2.prototype.pol.prototype=g2.mix(g2.prototype.nod.prototype,{g2(){return g2().beg(g2.flatten(this)).cir({r:6,fs:"@fs2"}).cir({r:2.5,fs:"@ls",ls:"transparent"}).end().ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.gnd=function(args={}){return this.addCommand({c:"gnd",a:args})};g2.prototype.gnd.prototype=g2.mix(g2.prototype.nod.prototype,{g2(){return g2().beg(g2.flatten(this)).cir({x:0,y:0,r:6}).p().m({x:0,y:6}).a({dw:Math.PI/2,x:-6,y:0}).l({x:6,y:0}).a({dw:-Math.PI/2,x:0,y:-6}).z().fill({fs:g2.symbol.nodcolor}).end().ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.nodfix=function(args={}){return this.addCommand({c:"nodfix",a:args})};g2.prototype.nodfix.prototype=g2.mix(g2.prototype.nod.prototype,{g2(){return g2().beg(g2.flatten(this)).p().m({x:-8,y:-12}).l({x:0,y:0}).l({x:8,y:-12}).drw({fs:g2.symbol.nodfill2}).cir({x:0,y:0,r:this.r}).end().ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.nodflt=function(args={}){return this.addCommand({c:"nodflt",a:args})};g2.prototype.nodflt.prototype=g2.mix(g2.prototype.nod.prototype,{g2(){return g2().beg(g2.flatten(this)).p().m({x:-8,y:-12}).l({x:0,y:0}).l({x:8,y:-12}).drw({ls:g2.symbol.nodcolor,fs:g2.symbol.nodfill2}).cir({x:0,y:0,r:this.r,ls:g2.symbol.nodcolor,fs:g2.symbol.nodfill}).lin({x1:-9,y1:-19,x2:9,y2:-19,ls:g2.symbol.nodfill2,lw:5}).lin({x1:-9,y1:-15.5,x2:9,y2:-15.5,ls:g2.symbol.nodcolor,lw:2}).end().ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.vec=function vec(args){return this.addCommand({c:"vec",a:args})};g2.prototype.vec.prototype=g2.mix(g2.prototype.lin.prototype,{g2(){const{x1:x1,y1:y1,x2:x2,y2:y2,lw:lw=1,ls:ls="#000",ld:ld=[],fs:fs=ls||"#000",lc:lc="round",lj:lj="round"}=this;const dx=x2-x1,dy=y2-y1,r=Math.hypot(dx,dy);const b=3*(1+lw)>r?r/3:1+lw;const arrowHead=()=>g2().p().m({x:0,y:0}).l({x:-5*b,y:b}).a({dw:-Math.PI/3,x:-5*b,y:-b}).z().drw({ls:ls,fs:fs,lc:lc,lj:lj});return g2().beg({x:x1,y:y1,w:Math.atan2(dy,dx),lc:lc,lj:lj}).p().m({x:0,y:0}).l({x:r-3*b,y:0}).stroke({ls:ls,lw:lw,ld:ld}).use({grp:arrowHead,x:r,y:0}).end().ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.avec=function avec(args){return this.addCommand({c:"avec",a:args})};g2.prototype.avec.prototype=g2.mix(g2.prototype.arc.prototype,{g2(){const{x:x,y:y,r:r,w:w,dw:dw=0,lw:lw=1,lc:lc="round",lj:lj="round",ls:ls,fs:fs=ls||"#000",label:label}=this;const b=3*(1+lw)>r?r/3:1+lw,bw=5*b/r;const arrowHead=()=>g2().p().m({x:0,y:2*b}).l({x:0,y:-2*b}).m({x:0,y:0}).l({x:-5*b,y:b}).a({dw:-Math.PI/3,x:-5*b,y:-b}).z().drw({ls:ls,fs:fs});return g2().beg({x:x,y:y,w:w,ls:ls,lw:lw,lc:lc,lj:lj}).arc({r:r,w:0,dw:dw}).use({grp:arrowHead,x:r*Math.cos(dw),y:r*Math.sin(dw),w:dw>=0?dw+Math.PI/2-bw/2:dw-Math.PI/2+bw/2}).end().ins(g=>label&&this.drawLabel(g))}});g2.prototype.dim=function dim(args){return this.addCommand({c:"dim",a:args})};g2.prototype.dim.prototype=g2.mix(g2.prototype.lin.prototype,{pointAt(loc){const pnt=g2.prototype.lin.prototype.pointAt.call(this,loc);if(this.off){pnt.x+=this.off*pnt.nx;pnt.y+=this.off*pnt.ny}return pnt},g2(){const{x1:x1,y1:y1,x2:x2,y2:y2,lw:lw=1,lc:lc="round",lj:lj="round",off:off=0,inside:inside=true,ls:ls,fs:fs=ls||"#000",label:label}=this;const dx=x2-x1,dy=y2-y1,r=Math.hypot(dx,dy);const b=3*(1+lw)>r?r/3:1+lw;const arrowHead=()=>g2().p().m({x:0,y:2*b}).l({x:0,y:-2*b}).m({x:0,y:0}).l({x:-5*b,y:b}).a({dw:-Math.PI/3,x:-5*b,y:-b}).z().drw({ls:ls,fs:fs});return g2().beg({x:x1+off/r*dy,y:y1-off/r*dx,w:Math.atan2(dy,dx),ls:ls,fs:fs,lw:lw,lc:lc,lj:lj}).lin({x1:inside?4*b:0,y1:0,x2:inside?r-4*b:r,y2:0}).use({grp:arrowHead,x:r,y:0,w:inside?0:Math.PI}).use({grp:arrowHead,x:0,y:0,w:inside?Math.PI:0}).lin({x1:0,y1:off,x2:0,y2:0}).lin({x1:r,y1:off,x2:r,y2:0}).end().ins(g=>label&&this.drawLabel(g))}});g2.prototype.adim=function adim(args){return this.addCommand({c:"adim",a:args})};g2.prototype.adim.prototype=g2.mix(g2.prototype.arc.prototype,{g2(){const{x:x,y:y,r:r,w:w,dw:dw,lw:lw=1,lc:lc="round",lj:lj="round",ls:ls,fs:fs=ls||"#000",label:label}=this;const b=3*(1+lw)>r?r/3:1+lw,bw=5*b/r;const arrowHead=()=>g2().p().m({x:0,y:2*b}).l({x:0,y:-2*b}).m({x:0,y:0}).l({x:-5*b,y:b}).a({dw:-Math.PI/3,x:-5*b,y:-b}).z().drw({ls:ls,fs:fs});const outside=this.inside!==undefined&&this.outside===undefined?!this.inside:!!this.outside;return g2().beg({x:x,y:y,w:w,ls:ls,lw:lw,lc:lc,lj:lj}).arc({r:r,w:0,dw:dw}).use({grp:arrowHead,x:r,y:0,w:!outside&&dw>0||outside&&dw<0?-Math.PI/2+bw/2:Math.PI/2-bw/2}).use({grp:arrowHead,x:r*Math.cos(dw),y:r*Math.sin(dw),w:!outside&&dw>0||outside&&dw<0?dw+Math.PI/2-bw/2:dw-Math.PI/2+bw/2}).end().ins(g=>label&&this.drawLabel(g))}});g2.prototype.origin=function(args={}){return this.addCommand({c:"origin",a:args})};g2.prototype.origin.prototype=g2.mix(g2.prototype.nod.prototype,{lbloc:"sw",g2(){const{x:x,y:y,w:w,ls:ls="#000",lw:lw=1}=this;return g2().beg({x:x,y:y,w:w,ls:ls}).vec({x1:0,y1:0,x2:40,y2:0,lw:lw,fs:"#ccc"}).vec({x1:0,y1:0,x2:0,y2:40,lw:lw,fs:"#ccc"}).cir({x:0,y:0,r:lw+1,fs:"#ccc"}).end().ins(g=>this.label&&this.drawLabel(g))}});g2.prototype.ply.prototype=g2.mix(g2.labelIfc,g2.markIfc,{get isSolid(){return this.closed&&this.fs&&this.fs!=="transparent"},get sh(){return this.state&g2.OVER?[0,0,5,"black"]:false},pointAt(loc){const t=loc==="beg"?0:loc==="end"?1:loc+0===loc?loc:.5,pitr=g2.pntItrOf(this.pts),pts=[],len=[];for(let itr=0;itr<pitr.len;itr++){const next=pitr((itr+1)%pitr.len);pts.push(pitr(itr));len.push(Math.hypot(next.x-pitr(itr).x,next.y-pitr(itr).y))}this.closed||len.pop();const{t2:t2,x:x,y:y,dx:dx,dy:dy}=(()=>{const target=t*len.reduce((a,b)=>a+b);for(let itr=0,tmp=0;itr<pts.length;itr++){tmp+=len[itr];const next=pitr(itr+1).x?pitr(itr+1):pitr(0);if(tmp>=target){return{t2:1-(tmp-target)/len[itr],x:pts[itr].x,y:pts[itr].y,dx:next.x-pts[itr].x,dy:next.y-pts[itr].y}}}})();const len2=Math.hypot(dx,dy);return{x:(this.x||0)+x+dx*t2,y:(this.y||0)+y+dy*t2,nx:len2?dy/len2:1,ny:len2?dx/len2:0}},hit({x:x,y:y,eps:eps}){return this.isSolid?g2.isPntInPly({x:x-this.x,y:y-this.y},this,eps):g2.isPntOnPly({x:x-this.x,y:y-this.y},this,eps)},drag({dx:dx,dy:dy}){this.x+=dx;this.y+=dy},get g2(){const e=g2();this.label&&e.ins(e=>this.drawLabel(e));this.mark&&e.ins(e=>this.drawMark(e,this.closed));return()=>g2().ply(g2.flatten(this)).ins(e)}});g2.prototype.use.prototype={get p(){return{x:this.x,y:this.y}},get x(){return Object.getOwnPropertyDescriptor(this,"p")?this.p.x:0},get y(){return Object.getOwnPropertyDescriptor(this,"p")?this.p.y:0},set x(q){if(Object.getOwnPropertyDescriptor(this,"p"))this.p.x=q},set y(q){if(Object.getOwnPropertyDescriptor(this,"p"))this.p.y=q},isSolid:false};g2.prototype.spline=function spline({pts:pts,closed:closed,x:x,y:y,w:w}){arguments[0]._itr=g2.pntItrOf(pts);return this.addCommand({c:"spline",a:arguments[0]})};g2.prototype.spline.prototype=g2.mix(g2.prototype.ply.prototype,{g2:function(){let{pts:pts,closed:closed,x:x,y:y,w:w,ls:ls,lw:lw,fs:fs,sh:sh}=this,itr=this._itr,gbez;if(itr){let b=[],i,n=itr.len,p1,p2,p3,p4,d1,d2,d3,d1d2,d2d3,scl2,scl3,den2,den3,istrf=x||y||w;gbez=g2();if(istrf)gbez.beg({x:x,y:y,w:w});gbez.p().m(itr(0));for(let i=0;i<(closed?n:n-1);i++){if(i===0){p1=closed?itr(n-1):{x:2*itr(0).x-itr(1).x,y:2*itr(0).y-itr(1).y};p2=itr(0);p3=itr(1);p4=n===2?closed?itr(0):{x:2*itr(1).x-itr(0).x,y:2*itr(1).y-itr(0).y}:itr(2);d1=Math.max(Math.hypot(p2.x-p1.x,p2.y-p1.y),Number.EPSILON);d2=Math.max(Math.hypot(p3.x-p2.x,p3.y-p2.y),Number.EPSILON)}else{p1=p2;p2=p3;p3=p4;p4=i===n-2?closed?itr(0):{x:2*itr(n-1).x-itr(n-2).x,y:2*itr(n-1).y-itr(n-2).y}:i===n-1?itr(1):itr(i+2);d1=d2;d2=d3}d3=Math.max(Math.hypot(p4.x-p3.x,p4.y-p3.y),Number.EPSILON);d1d2=Math.sqrt(d1*d2),d2d3=Math.sqrt(d2*d3),scl2=2*d1+3*d1d2+d2,scl3=2*d3+3*d2d3+d2,den2=3*(d1+d1d2),den3=3*(d3+d2d3);gbez.c({x:p3.x,y:p3.y,x1:(-d2*p1.x+scl2*p2.x+d1*p3.x)/den2,y1:(-d2*p1.y+scl2*p2.y+d1*p3.y)/den2,x2:(-d2*p4.x+scl3*p3.x+d3*p2.x)/den3,y2:(-d2*p4.y+scl3*p3.y+d3*p2.y)/den3})}gbez.c(closed?{x:itr(0).x,y:itr(0).y}:{x:itr(n-1).x,y:itr(n-1).y});if(closed)gbez.z();gbez.drw({ls:ls,lw:lw,fs:fs,sh:sh});if(istrf)gbez.end()}return gbez}});"use strict";
 /**
  * g2.mec (c) 2013-18 Stefan Goessner
  * @author Stefan Goessner