How to use the d3-contour.contours function in d3-contour
To help you get started, we’ve selected a few d3-contour examples, based on popular ways it is used in public projects.
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ethantran / react-native-examples / src / components / AnimatedSvgD3Contour.js View on Github 
function createGenerator(props, generator?: Contours): Contours {
generator = generator || d3.contours();
return args.reduce((acc: Contours, arg) => {
const prop = props[arg];
if (prop) {
return acc[arg](prop);
}
return acc;
}, generator);
}function create(img) {
return contours()
.size([m, n])
.thresholds(thresholds)(values)
.map(function (contour) {
var canvas = document.createElement('canvas');
var ctx = canvas.getContext('2d');
canvas.width = 2048;
canvas.height = 2048;
var path = geoPath(null, ctx);
if (img) {
var pattern = ctx.createPattern(img, 'repeat');
ctx.fillStyle = pattern;
}
else {
ctx.fillStyle = '#fff';
}
ctx.fillRect(0, 0, canvas.width, canvas.height);d3-contour
Compute contour polygons using marching squares.
