CHAPTER 7
Code Explanation
} Close clause
curwall = new
Wall(mx,my,mx+1,my+1,wallwidth,wallstyle);
Create new wall. It is small at this point.inmotion = true; Set inmotion to true
everything.push(curwall); Add curwall to everything
drawall(); Draw everything
} Close function
function stretchwall(ev) { Function header stretchwall to that
uses the dragging of the mouse to
stretch out a wall while the mouse is
dragged.
if (inmotion) { Check if inmotion
var mx; Hold mouse x
var my; Hold mouse y
if ( ev.layerX || ev.layerX == 0) { Can we use layerX?
mx= ev.layerX; Set mx
my = ev.layerY; Set my
} else if (ev.offsetX
|| ev.offsetX == 0) {
Else can we use offsetX? This is
necessary for different browsers.mx = ev.offsetX; Set mx
my = ev.offsetY; Set my
} Close clause
curwall.fx = mx; Change curwall.fx to mx
curwall.fy = my; Change curwall.fy to my