@visactor/vrender-core/es/graphic/builtin-symbol/thin-triangle.js

## Description

import { sqrt } from "@visactor/vutils";

import { BaseSymbol } from "./base";

const sqrt3 = sqrt(3);

export function thinTriangle(ctx, r, x, y) {
    const h = r * sqrt3;
    return ctx.moveTo(x, y + -h / 3 * 2), ctx.lineTo(r + x, y + h), ctx.lineTo(x - r, y + h), 
    ctx.closePath(), !0;
}

export class ThinTriangleSymbol extends BaseSymbol {
    constructor() {
        super(...arguments), this.type = "thinTriangle", this.pathStr = "M0,-0.5773502691896257L-0.5,0.28867513459481287L0.5,0.28867513459481287Z";
    }
    draw(ctx, size, x, y) {
        return thinTriangle(ctx, this.parseSize(size) / 2 / sqrt3, x, y);
    }
    drawOffset(ctx, size, x, y, offset) {
        return thinTriangle(ctx, this.parseSize(size) / 2 / sqrt3 + offset, x, y);
    }
}

export default new ThinTriangleSymbol;
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