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Is it going so far so in the last lesson, we identified a problem because we can move off of our grid

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and we need to set the boundaries that the player needs to stay within our game area, otherwise it

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could go pretty much anywhere.

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So we need to set those restrictions.

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That's what I'm going to do in this lesson.

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So opening up where we handle our key press, so setting a condition.

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So checking to see if the player pressed left and if they did, then we're checking the value of box

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X.

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So this is the variable within box where we're tracking the position of X and we're checking to see

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if it's larger than game area.

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And remember, we got that bounding client bounding rectangle value.

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So that's the game area left.

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So making sure that if we're going left, we're not outside of the left area.

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So now, even if I press left, we're not doing anything because we're not able to move left anymore

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and we've got to do the same thing for right.

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So the same idea here where we're taking the value of box X and we going to make sure that the value

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of X is less than we got to do.

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Some little bit of calculation here because we can do game area.

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Right.

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But what that's going to do is it's not going to actually account for the width.

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So if we can still go over, but we can't go over too much, so we can still go out of balance, we

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want to still restrict that.

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So we've got a little bit more calculating and lucky for us, we can get the width of our box elements.

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So clearing that out, we've got our box object and we can see that we can get the offset width of that,

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which is of course, one hundred, because that's how wide it is.

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And we try to keep it, of course, dynamic as possible.

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So subtracting the value of box.

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Offset with should account for that ability to go one more over.

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So now we are restricting it to that boundary area so that we can't go off of the edge and we need to

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do the same thing for down and as well as up.

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So taking down, checking to see if this time we're using box, why is less then and we're using that

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same game area and it's going to be game area bottom.

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So let's try that out.

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So refresh and going down.

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So we see we had the same problem here that we can go past what the bottom areas and we need to make

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that same adjustment accounting for the height of the box.

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So add in some extra brackets there and we're going to subtract the value of box and offset height this

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time.

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So that will account for the height of the box and we'll just make sure that it works.

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So now we can't go below 17 and we've got one last one to take care of and that's the up.

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So checking to see if box Y is greater than game area top.

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And try that one more time, so I can't go up, I can't go out of bounds and exactly what we want to

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be able to do and we see that we're still tracking the squares properly.

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So that's going to be essential in the upcoming lesson where we start activating our books in order

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to navigate to to in order to score within this game.

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So go ahead and add the boundaries into your project so that you can't the player can't exit out of

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or get out of bounds of our gameplay area.

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And coming up next, we're going to add in our active object that we need to pursue.