web-ui-pack/helpers/math.js

Web package with UI elements

export function mathFixFP(v) {
    if (Number.isInteger(v)) {
        return v;
    }
    return Number(v.toPrecision(15));
}
export function mathScaleValue(v, fromMin, fromMax, toMin, toMax) {
    const span = (toMax - toMin) / (fromMax - fromMin);
    return span * (v - fromMin) + toMin;
}
export function mathRotate(cx, cy, x, y, angle) {
    const rad = (Math.PI / 180) * angle;
    const cos = Math.cos(rad);
    const sin = Math.sin(rad);
    const nx = cos * (x - cx) - sin * (y - cy) + cx;
    const ny = cos * (y - cy) + sin * (x - cx) + cy;
    return [Math.round(nx), Math.round(ny)];
}