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円をつなぐ線 p5.js
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// https://stackoverflow.com/questions/4856717/javascript-equivalent-of-pythons-zip-function | |
// ex: | |
// zip([[1,2,3],['a','b','c']]) | |
// [[1,'a'],[2, 'b'], [3, 'c']] | |
const zip = rows => rows[0].map((_, c) => rows.map(row => row[c])); | |
function makeCirclePoints(degs, t, offsetX, offsetY) { | |
return degs.map(deg => ({ | |
"x": cos(radians(deg + t)) * 50 + offsetX, | |
"y": sin(radians(deg + t)) * 50 + offsetY, | |
"color": color(int(map(deg % 360, 0, 359, 0, 255)), 239, 239) | |
})); | |
} | |
function drawCircle(points) { | |
points.forEach(p => { | |
strokeWeight(5); | |
stroke(p.color); | |
point(p.x, p.y); | |
}); | |
} | |
function drawLine(point1, point2) { | |
stroke(point1.color); | |
strokeWeight(1); | |
line(point1.x, point1.y, point2.x, point2.y); | |
} | |
var degs; | |
function setup() { | |
createCanvas(400, 400); | |
colorMode(HSB, 255); | |
degs = Array.from({ length: 360 / 15 }, (v, k) => k * 15); | |
} | |
function draw() { | |
background(40); | |
var t = frameCount * 0.5; | |
var points1 = makeCirclePoints(degs, t, width / 2, height / 6 * 1); | |
var points2 = makeCirclePoints(degs, t + 90, width / 6 * 5, height / 2); | |
var points3 = makeCirclePoints(degs, t + 180, width / 2, height / 6 * 5); | |
var points4 = makeCirclePoints(degs, t + 270, width / 6 * 1, height / 2); | |
[points1, points2, points3, points4].map(p => drawCircle(p)); | |
zip([points1, points2]).forEach(p => drawLine(p[0], p[1])); | |
zip([points2, points3]).forEach(p => drawLine(p[0], p[1])); | |
zip([points3, points4]).forEach(p => drawLine(p[0], p[1])); | |
zip([points1, points4]).forEach(p => drawLine(p[0], p[1])); | |
} |
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