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

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

export function leftArrow(pen, ctx) {
    const path = !ctx ? new Path2D() : ctx;
    const { x, y, width, height } = pen.calculative.worldRect;
    path.moveTo(x, y + height / 2);
    path.lineTo(x + height / 2, y);
    path.lineTo(x + height / 2, y + height / 3);
    path.lineTo(x + width, y + height / 3);
    path.lineTo(x + width, y + (height * 2) / 3);
    path.lineTo(x + height / 2, y + (height * 2) / 3);
    path.lineTo(x + height / 2, y + (height * 2) / 3);
    path.lineTo(x + height / 2, y + height);
    path.closePath();
    if (path instanceof Path2D)
        return path;
}
export function rightArrow(pen, ctx) {
    const path = !ctx ? new Path2D() : ctx;
    const { x, y, width, height } = pen.calculative.worldRect;
    path.moveTo(x, y + height / 3);
    path.lineTo(x + (width - height / 2), y + height / 3);
    path.lineTo(x + (width - height / 2), y);
    path.lineTo(x + width, y + height / 2);
    path.lineTo(x + (width - height / 2), y + height);
    path.lineTo(x + (width - height / 2), y + (height * 2) / 3);
    path.lineTo(x, y + (height * 2) / 3);
    path.closePath();
    if (path instanceof Path2D)
        return path;
}
export function twowayArrow(pen, ctx) {
    const path = !ctx ? new Path2D() : ctx;
    const { x, y, width, height } = pen.calculative.worldRect;
    path.moveTo(x, y + height / 2);
    path.lineTo(x + height / 2, y);
    path.lineTo(x + height / 2, y + height / 3);
    path.lineTo(x + (width - height / 2), y + height / 3);
    path.lineTo(x + (width - height / 2), y);
    path.lineTo(x + width, y + height / 2);
    path.lineTo(x + (width - height / 2), y + height);
    path.lineTo(x + (width - height / 2), y + (height * 2) / 3);
    path.lineTo(x + height / 2, y + (height * 2) / 3);
    path.lineTo(x + height / 2, y + height);
    path.closePath();
    if (path instanceof Path2D)
        return path;
}
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