Animator.s3d

#ifndef _ANIMATOR
#define _ANIMATOR

class Animator
{
    var size;
    var objs;
    var head;
    var tail;

    Add(obj, delay, startPos, endPos, hMax);
    Update();
    CalcParabola(xBegin, xEnd, zBegin, zEnd, yStart, yApex, t);
    CalcY(startingHeight, apexHeight, t);
    CalcX(start, end, t);
    CalcZ(start, end, t);
};

function Animator::Animator()
{
    size = 6;
    objs = Array(size);
    head = 0;
    tail = 0;
}

function Animator::Add(obj, delay, startPos, endPos, hMax)
{
    objs[tail] = {obj, delay, startPos, endPos, hMax};
    tail = (tail + 1) % size;
}

function Animator::Update()
{
    var i = head;
    while(i != tail)
    {
        var o = objs[i];
        var t = o[1];
        if(t < 1.0)
        {
            t = t + 0.01;
            o[1] = t;
            if(t > 0.0)
            {
                var newPos = CalcParabola(o[2][0], o[3][0], o[2][2], o[3][2], o[2][1], o[4], t);
                o[0].obj.SetPosition(newPos);
            }

            if(t > 0.8)
            {
                o[0].Promote();
                //OutputLN("Promoting!!!");
            }
        }
        else if(i == head)
            head = (head + 1) % size;

        i = (i+1) % size;
    }
}

function Animator::CalcParabola(xBegin, xEnd, zBegin, zEnd, yStart, yApex, t){
    return [CalcX(xBegin,xEnd,t), CalcY(yStart,yApex,t), CalcZ(zBegin,zEnd,t)];
}

function Animator::CalcY(startingHeight, apexHeight, t)
{
    var B = (apexHeight - startingHeight) / 4;
    var A = -B;
    var C = startingHeight;
    return A*t*t + B*t + C;
}

function Animator::CalcX(start, end, t)
{
    var A = (end - start);
    var B = start;
    return A*t + B;
}

function Animator::CalcZ(start, end, t)
{
    var A = (end - start);
    var B = start;
    return A*t + B;
}

#endif