Function collision

docs/app/js/sanddance-app.js:138812–138815

($, x, y, textHeight, textWidth, h, bm0, bm1)

    return x - r < 0 || x + r > width || y - (r = textHeight / 2) < 0 || y + r > height;
}
function collision($, x, y, textHeight, textWidth, h, bm0, bm1) {
    const w = textWidth * h / (textHeight * 2), x1 = $(x - w), x2 = $(x + w), y1 = $(y - (h = h / 2)), y2 = $(y + h);
    return bm0.outOfBounds(x1, y1, x2, y2) || bm0.getRange(x1, y1, x2, y2) || bm1 && bm1.getRange(x1, y1, x2, y2);
}
function placeAreaLabelReducedSearch($, bitmaps, avoidBaseMark, markIndex) {
    const width = $.width, height = $.height, bm0 = bitmaps[0], // where labels have been placed
    bm1 = bitmaps[1]; // area outlines