Visual Engineer.
Public
Edited
Nov 10, 2021
7 stars
{
// MAIN
const svg = d3.select(DOM.svg(width, 400))
.attr('style', 'border: 1px solid #eee')
const polygonLayer = svg.append('g')
.attr('class', 'polygon_layer')
const intersectLayer = svg.append('g')
.attr('class', 'intersect_layer')
const handlesLayer = svg.append('g')
.attr('class', 'circles_layer')
// set data for layers
const handles = handlesLayer.selectAll('g').data(_.flatten(mutable polygonPositions))
const polygons = polygonLayer.selectAll('g').data(mutable polygonPositions)
const clippedLayer = intersectLayer.append('path')
function update() {
handles.enter().selectAll('circle')
.attr('cx', (d) => d[0])
.attr('cy', (d) => d[1])
polygons.enter().selectAll('path')
.attr('d', d => {
return `${makeLine(d)}z`
})
switch (clippingMethod) {
case "union":
const unionPoints = clipping.union(
[mutable polygonPositions[0]],
[mutable polygonPositions[1]]
)
clippedLayer.attr('d', `${makeLine(_.flatten(_.flatten(unionPoints)))}z`)
.attr('class', 'union')
break;
case "intersection":
const polys = [
[mutable polygonPositions[0]],
[mutable polygonPositions[1]]
]
const intersectionPoints = clipping.intersection(...polys)
clippedLayer.attr('d', `${makeLine(_.flatten(_.flatten(intersectionPoints)))}z`)
.attr('class', 'intersection')
break;
case "xor":
const xorPoints = clipping.xor(
[mutable polygonPositions[0]],
[mutable polygonPositions[1]]
)
clippedLayer.attr('d', `${makeLine(_.flatten(_.flatten(xorPoints)))}z`)
.attr('class', 'xor')
break;
case "difference":
const differencePoints = clipping.difference(
[mutable polygonPositions[0]],
[mutable polygonPositions[1]]
)
clippedLayer.attr('d', `${makeLine(_.flatten(_.flatten(differencePoints)))}z`)
.attr('class', 'difference')
break;
default:
break;
}
}
// create polygons
polygons.enter().append('g')
.append('path')
.attr('class', 'edge')
.attr('stroke-width', 1.5)
.attr('stroke', '#eee')
.attr('fill', 'none')
// create circles
handles.enter().append('circle')
.attr("cursor", "move")
.attr("pointer-events", "all")
.attr('fill', 'salmon')
.attr('r', 8)
.call(d3.drag()
.on("drag", dragged))
update()
function dragged(point) {
point[0] = d3.event.x
point[1] = d3.event.y
mutable polygonPositions = mutable polygonPositions
update()
}
return svg.node()
}
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