/*
* Copyright (C) 2019 Intel Corporation
* SPDX-License-Identifier: MIT
*/

// Translate point array from the client coordinate system
// to a coordinate system of a canvas
export function translateFromSVG(svg: SVGSVGElement, points: number[]): number[] {
    const output = [];
    const transformationMatrix = svg.getScreenCTM();
    let pt = svg.createSVGPoint();
    for (let i = 0; i < points.length - 1; i += 2) {
        pt.x = points[i];
        pt.y = points[i + 1];
        pt = pt.matrixTransform(transformationMatrix);
        output.push(pt.x, pt.y);
    }

    return output;
}

// Translate point array from a coordinate system of a canvas
// to the client coordinate system
export function translateToSVG(svg: SVGSVGElement, points: number[]): number[] {
    const output = [];
    const transformationMatrix = svg.getScreenCTM().inverse();
    let pt = svg.createSVGPoint();
    for (let i = 0; i < points.length; i += 2) {
        pt.x = points[i];
        pt.y = points[i + 1];
        pt = pt.matrixTransform(transformationMatrix);
        output.push(pt.x, pt.y);
    }

    return output;
}