Iterative Canvas Code

As promised, here is a sampling of code from Iterative Canvas. This is the 'meat' of the program. While it makes up a fraction of the program's code, this is what generates and draws the output when running the game. It may be a little tough to follow, but any line that starts with two slashes (//) is a comment describing in English what is going on (the computer ignores these lines.)

this.addPoint = function(){
    if(endPoints.length > 0){
        
        //gets settings from the control panel
        var distChange = parseFloat(eval(document.getElementById('step').value));
        
        //randonly choose a target point
        var targetPoint = nextTarget;
        nextTarget = Math.floor (Math.random() * endPoints.length);
        
        //find the X's position after jumping the set distance to that target point
        curPoint[0] = curPoint[0] + ((endPoints[targetPoint][0]-1)-curPoint[0])*distChange;
        curPoint[1] = curPoint[1] + ((endPoints[targetPoint][1]-1)-curPoint[1])*distChange;
        
        //draw the new black dot
        context.fillRect(curPoint[0], curPoint[1], 1, 1);
        
        //call other code to move the X to the new location
        funitfciterativecanvas.updateXdraw();
        
        //if the program is running to infinity keep track of how far
        if(remainingPoints == 'inf') infRunCount++;
        
        //if the program isn't running to infinity, subtract one from the number of times this has to run
        if(remainingPoints != 'inf' && remainingPoints != 0) remainingPoints--;
        
        //if this has to be run more times
        if(remainingPoints != 0){
            //if drawing normally (not quickly) then delay and run again - also a hack to solve overflow problems in recursion
            if((document.getElementById('quickDraw').checked === false && (!remainingPoints || remainingPoints == 'inf'))
                    || remainingPoints == 1 || (infRunCount == 200 && document.getElementById('quickDraw').checked === true)){
                setTimeout(funitfciterativecanvas.addPoint, 0);
                infRunCount = 0;
            }
            
            //continue drawing points quickly
            else{
                funitfciterativecanvas.addPoint();
            }
        }
    }
}