@meta2d/core/src/diagrams/triangle.js

@meta2d/core: Powerful, Beautiful, Simple, Open - Web-Based 2D At Its Best .

export function triangle(pen, ctx) {
    const path = !ctx ? new Path2D() : ctx;
    const { x, y, width, height } = pen.calculative.worldRect;
    path.moveTo(x + width / 2, y);
    path.lineTo(x + width, y + height);
    path.lineTo(x, y + height);
    path.lineTo(x + width / 2, y);
    path.closePath();
    if (path instanceof Path2D)
        return path;
}
export function triangleAnchors(pen) {
    const points = [
        {
            x: 0.5,
            y: 0,
        },
        {
            x: 0.75,
            y: 0.5,
        },
        {
            x: 0.5,
            y: 1,
        },
        {
            x: 0.25,
            y: 0.5,
        },
    ];
    pen.anchors = points.map(({ x, y }, index) => {
        return {
            id: `${index}`,
            penId: pen.id,
            x,
            y,
        };
    });
}
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