Function mix

paint.js:198–200

(a, b, t)

    }

    function mix (a, b, t) {
        return (1.0 - t) * a + t * b;
    }

    //the texture is always updated to be (paintingWidth x paintingHeight) x resolutionScale
    function Snapshot (texture, paintingWidth, paintingHeight, resolutionScale) {