A Pen by Martijn Kunstman on CodePen.
Created
March 18, 2021 13:40
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Dragon Curve Round
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| let width = 800; | |
| let height = 800; | |
| let scale = 20; | |
| let depth = 8; | |
| //---------------- | |
| let curvePattern = [0]; | |
| function generateCurvePattern(itterations) { | |
| for (let i = 0; i < itterations; i++) { | |
| curvePattern = curvePattern.concat( | |
| curvePattern.map((x) => (x ? 0 : 1)).reverse() | |
| ); | |
| curvePattern.splice(Math.floor(curvePattern.length / 2), 0, 0); | |
| } | |
| } | |
| function setup() { | |
| generateCurvePattern(depth); | |
| createCanvas(width, height); | |
| let oldx = width / 2; | |
| let oldy = height / 2; | |
| let oldarcx = oldx; | |
| let oldarcy = oldy; | |
| let direction = 0; | |
| let arrayPoints = []; | |
| arrayPoints.push({ x: oldx, y: oldy }); | |
| let color = 0; | |
| for (let i = 0; i < curvePattern.length; i++) { | |
| direction = curvePattern[i] ? direction + 1 : direction - 1; | |
| let x = Math.round( | |
| oldx + scale * Math.cos((Math.PI * direction * 90) / 180.0) | |
| ); | |
| let y = Math.round( | |
| oldy + scale * Math.sin((Math.PI * direction * 90) / 180.0) | |
| ); | |
| strokeWeight(0.5); | |
| //line(oldx, oldy, x, y); | |
| oldx = x; | |
| oldy = y; | |
| arrayPoints.push({ x: x, y: y }); | |
| if (arrayPoints.length > 3) { | |
| arrayPoints.shift(); | |
| } | |
| strokeWeight(2); | |
| if (arrayPoints.length == 3) { | |
| xx = (arrayPoints[0].x + arrayPoints[2].x) / 2; | |
| yy = (arrayPoints[0].y + arrayPoints[2].y) / 2; | |
| //----- | |
| if ( | |
| arrayPoints[0].x > arrayPoints[2].x && | |
| arrayPoints[0].y < arrayPoints[2].y | |
| ) { | |
| if (yy > arrayPoints[1].y) { | |
| arc(xx, yy, scale, scale, PI, PI + PI / 2); | |
| } else { | |
| arc(xx, yy, scale, scale, 0, PI / 2); | |
| } | |
| } | |
| //----- | |
| if ( | |
| arrayPoints[0].x < arrayPoints[2].x && | |
| arrayPoints[0].y < arrayPoints[2].y | |
| ) { | |
| if (yy > arrayPoints[1].y) { | |
| arc(xx, yy, scale, scale, PI + PI / 2, 0); | |
| } else { | |
| arc(xx, yy, scale, scale, PI / 2, PI); | |
| } | |
| } | |
| //----- | |
| if ( | |
| arrayPoints[0].x > arrayPoints[2].x && | |
| arrayPoints[0].y > arrayPoints[2].y | |
| ) { | |
| if (yy > arrayPoints[1].y) { | |
| arc(xx, yy, scale, scale, PI + PI / 2, 0); | |
| } else { | |
| arc(xx, yy, scale, scale, PI / 2, PI); | |
| } | |
| } | |
| //----- | |
| if ( | |
| arrayPoints[0].x < arrayPoints[2].x && | |
| arrayPoints[0].y > arrayPoints[2].y | |
| ) { | |
| if (yy > arrayPoints[1].y) { | |
| arc(xx, yy, scale, scale, PI, PI + PI / 2); | |
| } else { | |
| arc(xx, yy, scale, scale, 0, PI / 2); | |
| } | |
| } | |
| //----- | |
| } | |
| } | |
| } |
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