how to fill circle with lines? (canvas ctx 2d)

Question

Is there a way how to fill circle with lines, in same way as it shown in the picture, without math computations for x1y1-x2y2 points on circle body? I mean, something like configuration for gradient or anything else?

Answer 1

Code taken from this mdn article

Result:

// Create a pattern, offscreen
const patternCanvas = document.createElement("canvas");
const patternContext = patternCanvas.getContext("2d");

// Give the pattern a width and height of 50
patternCanvas.width = 25;
patternCanvas.height = 25;

// Give the pattern a background color and draw an arc
patternContext.fillStyle = "white";
patternContext.strokeStyle = "green";
patternContext.lineWidth = 2
patternContext.fillRect(0, 0, patternCanvas.width, patternCanvas.height);
patternContext.moveTo(0, 0);
patternContext.lineTo(25, 25);
patternContext.stroke();

// Create our primary canvas and fill it with the pattern
const canvas = document.createElement("canvas");
const ctx = canvas.getContext("2d");
const pattern = ctx.createPattern(patternCanvas, "repeat");
ctx.fillStyle = pattern;
ctx.arc(50, 50, 50, 0, Math.PI * 2);
ctx.fill();
ctx.stroke();

// Add our primary canvas to the webpage
document.body.appendChild(canvas);