@webarkit/arnft-threejs/src/utils/Utils.ts

The ARnft rendering engine, based on Three.js

export function getTime(): number {
    return Math.floor(Date.now() / 1000);
}
export class Utils {
    private static trackedMatrix: any = {
        // for interpolation
        delta: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
        interpolated: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
    };
    //private static interpolationFactor: number = 24
    static interpolate(world: any) {
        const interpolationFactor = 24;

        // interpolate matrix
        for (let i = 0; i < 16; i++) {
            this.trackedMatrix.delta[i] = world[i] - this.trackedMatrix.interpolated[i];
            this.trackedMatrix.interpolated[i] =
                this.trackedMatrix.interpolated[i] + this.trackedMatrix.delta[i] / interpolationFactor;
        }
        return this.trackedMatrix.interpolated;
    }

    static isMobile() {
        return /Android|mobile|iPad|iPhone/i.test(navigator.userAgent);
    }

    static setMatrix(matrix: any, value: any) {
        const array: any = [];
        for (const key in value) {
            array[key] = value[key];
        }
        if (typeof matrix.elements.set === "function") {
            matrix.elements.set(array);
        } else {
            matrix.elements = [].slice.call(array);
        }
    }
}