46 lines
935 B
TypeScript
46 lines
935 B
TypeScript
import type { Vector } from "#/engine/Vector.ts";
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export type Circle = {
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position: Vector;
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radius: number;
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};
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export function createCircle(position: Vector, radius: number): Circle {
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return {
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position,
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radius,
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};
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}
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export function strokeCircle(
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ctx: CanvasRenderingContext2D,
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circle: Circle,
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color: string = "#fff",
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alpha: number = 1.0,
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lineWidth: number = 1,
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): void {
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ctx.save();
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ctx.strokeStyle = color;
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ctx.globalAlpha = alpha;
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ctx.lineWidth = lineWidth;
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ctx.beginPath();
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ctx.arc(circle.position.x, circle.position.y, circle.radius, 0, 2 * Math.PI);
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ctx.stroke();
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ctx.restore();
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}
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export function fillCircle(
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ctx: CanvasRenderingContext2D,
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circle: Circle,
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color: string = "#fff",
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alpha: number = 1.0,
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): void {
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ctx.save();
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ctx.fillStyle = color;
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ctx.globalAlpha = alpha;
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ctx.beginPath();
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ctx.arc(circle.position.x, circle.position.y, circle.radius, 0, 2 * Math.PI);
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ctx.fill();
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ctx.restore();
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}
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