Function getPatternSize

src/util/decal.ts:162–207

* Get minimum length that can make a repeatable pattern. * * @return {Object} pattern width and height

()

         * @return {Object} pattern width and height
         */
        function getPatternSize(): {
            width: number,
            height: number
        } {
            /**
             * For example, if dash is [[3, 2], [2, 1]] for X, it looks like
             * |---  ---  ---  ---  --- ...
             * |-- -- -- -- -- -- -- -- ...
             * |---  ---  ---  ---  --- ...
             * |-- -- -- -- -- -- -- -- ...
             * So the minimum length of X is 15,
             * which is the least common multiple of `3 + 2` and `2 + 1`
             * |---  ---  ---  |---  --- ...
             * |-- -- -- -- -- |-- -- -- ...
             */
            let width = 1;
            for (let i = 0, xlen = lineBlockLengthsX.length; i < xlen; ++i) {
                width = getLeastCommonMultiple(width, lineBlockLengthsX[i]);
            }

            let symbolRepeats = 1;
            for (let i = 0, xlen = symbolArray.length; i < xlen; ++i) {
                symbolRepeats = getLeastCommonMultiple(symbolRepeats, symbolArray[i].length);
            }
            width *= symbolRepeats;

            const height = lineBlockLengthY * lineBlockLengthsX.length * symbolArray.length;

            if (__DEV__) {
                const warn = (attrName: string) => {
                    /* eslint-disable-next-line */
                    console.warn(`Calculated decal size is greater than ${attrName} due to decal option settings so ${attrName} is used for the decal size. Please consider changing the decal option to make a smaller decal or set ${attrName} to be larger to avoid incontinuity.`);
                };
                if (width > decalOpt.maxTileWidth) {
                    warn('maxTileWidth');
                }
                if (height > decalOpt.maxTileHeight) {
                    warn('maxTileHeight');
                }
            }

            return {
                width: Math.max(1, Math.min(width, decalOpt.maxTileWidth)),
                height: Math.max(1, Math.min(height, decalOpt.maxTileHeight))
            };
        }

        function brushDecal() {
            if (ctx) {