Public
Edited
Sep 12, 2023
class BumpRadial {
constructor(context) {
this._context = context;
}
lineStart() {
this._point = 0;
}
lineEnd() {}
point(x, y) {
x = +x, y = +y;
if (this._point === 0) {
this._point = 1;
} else {
//x=theta,y=r
const p0 = pointRadial(this._x0, this._y0);
const p1 = pointRadial(x,y);
this._context.moveTo(...p0);
// console.group()
// console.log(this._y0)
// console.log(this._x0)
// console.log(x,y)
// console.groupEnd()
this._context.arc(0,0,this._y0,this._x0,x)
this._context.lineTo(...p1)
}
this._x0 = x, this._y0 = y;
}
}
function bumpRadial(context) {
return new BumpRadial(context);
}
pointRadial = function(theta, r) {
return [(r = +r) * Math.cos(theta), r * Math.sin(theta)];
}
pointRadial(100,Math.Pi)
function linkRadial() {
const l = d3.link(bumpRadial);
l.angle = l.x, delete l.x;
l.radius = l.y, delete l.y;
return l;
}
linker=linkRadial().angle(d=>d.theta).radius(d=>d.r)
function linkStep(startAngle, startRadius, endAngle, endRadius) {
const c0 = Math.cos(startAngle = (startAngle - 90) / 180 * Math.PI);
const s0 = Math.sin(startAngle);
const c1 = Math.cos(endAngle = (endAngle - 90) / 180 * Math.PI);
const s1 = Math.sin(endAngle);
return "M" + startRadius * c0 + "," + startRadius * s0
+ (endAngle === startAngle ? "" : "A" + startRadius + "," + startRadius + " 0 0 " + (endAngle > startAngle ? 1 : 0) + " " + startRadius * c1 + "," + startRadius * s1)
+ "L" + endRadius * c1 + "," + endRadius * s1;
}
svg`<svg width=600 height=600><path d="${linker(data[0])}" fill="none" stroke="black" transform="translate(150,150)"></svg>`
c = d3.path()
data = [{source:{r:100,theta:3/2*Math.PI},target:{r:200,theta:Math.PI/2}},{source:{r:6,theta:0},target:{r:5,theta:1}}]
function getLinker(data){
const c= d3.path();
const center = [0,0];
c.moveTo(data.source.r*Math.cos(data.source.theta),data.source.r*Math.sin(data.source.theta))
c.arc(center[0],center[1],data.source.r,data.source.theta,data.target.theta)
c.lineTo(data.target.r*Math.cos(data.target.theta),data.target.r*Math.sin(data.target.theta))
return c.toString()
}
getLinker(data[0])
data[0]
linkStep(data[0].source.theta*180/Math.PI,data[0].source.r,data[0].target.theta*180/Math.PI,data[0].target.r)
linker(data[0])
class BumpRectangular {
constructor(context,c ) {
this._context = context;
this._c = c;
this._point = 0;
this._line = 0;
}
areaStart() {
this._line = 0;
}
areaEnd() {
this._line = NaN;
}
lineStart() {
this._point = 0;
}
lineEnd() {
if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
this._line = 1 - this._line;
}
// x and y are the end and x0 and y0 the start
point(x, y) {
// let _x = +x, _y = +y;
if (this._point === 0) {
this._point = 1;
} else {
if (this._c===0){ // no curve
var x1 = this._x0 +0.001 ;// tiny adjustment for faded line (can't have y or x dimension not change at all
this._context.moveTo(x1,this._y0);
this._context.lineTo(x1, y); //draws a straight line vertically
this._context.lineTo(x, y+0.001); // draws a straight line horizontally
}else if(this._c<1){
// curve
this._context.moveTo(this._x0,this._y0);
this._context.bezierCurveTo(this._x0,y, this._x0+Math.abs(this._c*(this._x0-x)), y, x, y);
} else if (this._c==1){
this._context.moveTo(this._x0,this._y0); // go to start
this._context.lineTo(x, y);// straight line to end
}
}
this._x0 = x;
this._y0 = y;
}
}
bumpRectangular=(c) =>(context) => new BumpRectangular(context,c);
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