연속적으로 변하는 선 너비로 선을 그리려면 다음 코드를 실행해 보십시오. -
예시
var context = document.getElementById('canvas1').getContext('2d'); var pts = [null, null, null, null]; for(var i=-1; i<25; i=i+1) { var width = 0.5+i/2; var m = 200; var x = Math.cos(i/4) * 180; var y = Math.sin(i/4) * 140; pts[0] = pts[1]; pts[1] = pts[2]; pts[2] = { X:x, Y:y}; if(pts[0] == null) continue; var p0 = pts[0]; var p1 = pts[1]; var p2 = pts[2]; var x0 = (p0.X + p1.X) / 2; var y0 = (p0.Y + p1.Y) / 2; var x1 = (p1.X + p2.X) / 2; var y1 = (p1.Y + p2.Y) / 2; context.beginPath(); context.lineWidth = width; context.strokeStyle = "blue"; context.moveTo(m+x0, m+y0); context.quadraticCurveTo(m+p1.X, m+p1.Y, m+x1, m+y1); context.stroke(); }