31:T8bc,chart = { const svg = d3.select(DOM.svg(width, height)); svg.append("rect") .attr("width", width) .attr("height", height); let points = {a: [Math.round(width * .1), Math.round(height / 2)], b: [Math.round(width * .9), Math.round(height / 2)]}; let length = geometric.lineLength([points.a, points.b]); svg.append("line") .attr("class", "midline") .attr("x1", midline[0][0]) .attr("y1", midline[0][1]) .attr("x2", midline[1][0]) .attr("y2", midline[1][1]); const drawline = svg.append("line") .attr("class", "drawline") .attr("x1", points.a[0]) .attr("y1", points.a[1]) .attr("x2", points.b[0]) .attr("y2", points.b[1]); const pointACircle = svg.append("circle") .attr("class", "point-a") .attr("data-point", "a") .attr("r", radius) .attr("transform", `translate(${points.a})`) .call(drag); const pointBCircle = svg.append("circle") .attr("class", "point-b") .attr("data-point", "b") .attr("r", radius) .attr("transform", `translate(${points.b})`) .call(drag); function drag(sel){ const selPoint = sel.attr("data-point"); const dragGenerator = d3.drag() .on("start", start) .on("drag", dragging) .on("end", end); function start(){ sel.classed("active", 1); drawline.classed("active", 1); } function dragging(){ event.preventDefault(); let x = Math.round(d3.event.x); x = x < radius ? radius : x > width - radius ? width - radius : x; let y = Math.round(d3.event.y); y = y < radius ? radius : y > height - radius ? height - radius : y; points[selPoint] = [x, y]; drawline .attr("x1", points.a[0]) .attr("y1", points.a[1]) .attr("x2", points.b[0]) .attr("y2", points.b[1]); pointACircle .attr("transform", `translate(${points.a})`); pointBCircle .attr("transform", `translate(${points.b})`); } function end(){ sel.classed("active", 0); drawline.classed("active", 0); } sel.call(dragGenerator); } return svg.node(); }32:[] 2f:{"title":"geometric.lineIntersectsLine","cells":[{"id":0,"value":"md`# geometric.lineIntersectsLine\n\n[geometric.lineIntersectsLine](https://github.com/HarryStevens/geometric#lineIntersectsLine)(lineA, lineB) returns a boolean representing whether a lineA intersects lineB.\n\nDrag either point to see how the intersection changes with the line.`","pinned":false,"hidden":false,"mode":"ojs"},{"id":133,"value":"intersects = geometric.lineIntersectsLine(line, midline);","pinned":false,"hidden":false,"mode":"ojs"},{"id":13,"value":"$31","pinned":false,"hidden":false,"mode":"ojs"},{"id":54,"value":"line = {\n while (true){\n let out = [];\n d3.selectAll(\"circle\")\n .each((d, i, e) => {\n out.push(d3.select(e[i]).attr(\"transform\").split(\"(\")[1].split(\")\")[0].split(\",\").map(d0 => +d0) );\n });\n \n yield out; \n }\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":130,"value":"midline = [[width / 2, 0], [width / 2, height]];","pinned":false,"hidden":false,"mode":"ojs"},{"id":27,"value":"md`## Style`","pinned":false,"hidden":false,"mode":"ojs"},{"id":29,"value":"html``","pinned":false,"hidden":false,"mode":"ojs"},{"id":156,"value":"{\n d3.select(\"rect\").classed(\"intersect\", intersects);\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":16,"value":"md`## Dimensions`","pinned":false,"hidden":false,"mode":"ojs"},{"id":18,"value":"height = 300;","pinned":false,"hidden":false,"mode":"ojs"},{"id":67,"value":"radius = 8;","pinned":false,"hidden":false,"mode":"ojs"},{"id":8,"value":"md`## Imports`","pinned":false,"hidden":false,"mode":"ojs"},{"id":6,"value":"geometric = require(\"geometric@2\");","pinned":false,"hidden":false,"mode":"ojs"},{"id":4,"value":"d3 = require(\"d3@5\");","pinned":false,"hidden":false,"mode":"ojs"}],"files":"$W32","stdlib":"1","titling":"auto"}