INNER CODE UNIT · JavaScript

getInterpolateAlpha

ensisoft/detonator · docu/OpenGL Camera_files/songho.js:292

function getInterpolateAlpha(alpha, mode)
{
    let HALF_PI = Math.PI * 0.5;
    let t = alpha;

    // recompute alpha based on animation mode
    if(mode == AnimationMode.EASE_IN)
    {
        t = 1 - Math.cos(HALF_PI * alpha);
    }
    else if(mode == AnimationMode.EASE_IN2)
    {
        t = 1 - Math.sqrt(1 - alpha * alpha);
    }
    else if(mode == AnimationMode.EASE_OUT)
    {
        t = Math.sin(HALF_PI * alpha);
    }

View source record →