var arryPtr:Object;

if(xx – 1 >= 0) {
arryPtr = mapArray[xx - 1][yy + 0]; //cell to the left
if(arryPtr.cellType != CELL_FILLED && closedList.indexOf(arryPtr) == -1) {
adjacentCell.push(arryPtr);
}
}

if(yy – 1 >= 0) {
arryPtr = mapArray[xx + 0][yy - 1]; //cell above
if(arryPtr.cellType != CELL_FILLED && closedList.indexOf(arryPtr) == -1) {
adjacentCell.push(arryPtr);
}
}
//… etc, for cells to the right and below

Of course, your way works!

If you actually need a good astar class, by the way, take a look at http://www.dauntless.be/astar/ . I haven’t actually used it, but from the demo, it’s far more mature, and can be set to disallow diagonal. It also handles the case of “diagonal allowed unless adjacent to an unwalkable cell,” which is super handy because when you’ve got a little guy following the path, you might want diagonal, but obviously don’t want him cutting across the corner of, say, a tree!

I’m guessing it’s part of this …

if(currentCell.x + xx >= 0 && currentCell.y + yy >= 0 && currentCell.x + xx < gridWidth && currentCell.y + yy < gridHeight)

I have fibromyalgia and excessive sleepiness/sleep apnea. My dr prescribed Provigil and hydrocodone for the pain and sleep issues, and after some tinkering with the dosages of both I’ve found pv works beautifully for the most part. I take 200 mg in the morning, and another 100mg in the early afternoon. As long as I drink plenty of fluids and eat a decent amount of calories (not too much or too little) pv is a wonder drug. The one major caveat to pv is that you can’t really take caffeine with it unless you wait several hours. It wrecks the functionality of the drug and may give you a headache.

When the pv doesn’t work so well, I take a mild adrenal stimulant prescribed by my acupuncturist, who I see once a month.

As far as the weight gain mentioned by the narcoleptic contributor goes, I combated this with a program on my iPhone called Lose It! It’s a simple calorie counter app on the phone, and I think it may have an online component for those without iPhones. You choose whether you think you can lose 1/2 a pound, 1 pound or 2 pounds per week. I chose the lowest setting (1/2 lb per week) and after a month of struggling to get my eating under control, it started working. I’ve lost 15 pounds since June 2009 (I’m writing this on Feb 1 2010) and will keep going until I lose all of the weight (35 lbs total) I put on over the past 2 years.

The last thing I do is a light exercise called Classical Stretch With Miranda Esmonde White. She’s on PBS, and the exercises are gentle but intelligent; I became stronger and got back the balance that the fibromyalgia threatened to do away with.

My blog, Touching An American Sky, covers everything I wrote about here. I also cover a lot of other stuff, like arts, culture and travel, but getting my health back is a huge part of my life right now.

Good luck to everyone here, no matter your reason for seeking a good stimulant!

I am looking forward in seeing how Provigil works for me.