Cameraman.s3d

#ifndef _CAMERAMAN
#define _CAMERAMAN

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

    Add(camera, endPos, endTarget, speed);
    Update();
};

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

function Cameraman::Add(camera, endPos, endTarget, speed)
{
    var s = speed != Void ? speed : 0.01;
    objs[tail] = {0.0, camera, camera.GetPosition(), camera.GetTarget(), endPos, endTarget, s};
    tail = (tail + 1) % size;
}

function Cameraman::Update()
{
    var i = head;
    while(i != tail)
    {
        var o = objs[i];
        var t = o[0];
        if(t < 1.0)
        {
            t = t + o[6];//0.01;
            o[0] = t;
            if(t > 0.0)
            {
                var newPosition =  [o[2][0] * (1-t) + o[4][0] * t,
                                    o[2][1] * (1-t) + o[4][1] * t,
                                    o[2][2] * (1-t) + o[4][2] * t];
                o[1].SetPosition(newPosition);

                var newTarget = [   o[3][0] * (1-t) + o[5][0] * t,
                                    o[3][1] * (1-t) + o[5][1] * t,
                                    o[3][2] * (1-t) + o[5][2] * t];
                o[1].SetTarget(newTarget);
            }
        }
        else if(i == head)
            head = (head + 1) % size;

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

#endif