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Welcome back.

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How's your project coming along in this lesson?

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We're going to be taking care of the shooting.

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So we've got player fire has been set to true if we press any of these keys and then within the update,

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we can check to see if that player fire is true.

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And if it is, then we can take an action accordingly to that.

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So setting that up and we can look to check to see if player fire is true.

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If it is, that means that we have to move our projectile.

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And there's a few other things that we still need to do as well, in addition.

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And that's actually set up the firing object.

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So we need to unhide remove the class of hide from it.

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We need to set the player fire as well and also the position of where it's starting.

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So creating a function in order to handle that, we can call that ad shoot and then this is the function

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that's actually going to get invoked whenever the player presses any of these keys.

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So we can keep that in here where we do add, shoot and also remove out that player fire.

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So we're going to have this happen one time.

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And if this is the case that it is true, we want to make sure that we're selecting that elements and

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updating its class list, removing the class of height.

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So it's going to show it on the screen.

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So see what happens.

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So now when I hit Start Game and if I press the space or if I press up, you see that the shooting object

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appears, the projectile appears.

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So the next thing that we need to do, we need to select that object and we're going to create a value

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of X in that object that we can call it X position or whatever we want to call it.

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This is a brand new value that we're setting and then taking the my ship offset left.

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So just as we did in the last lesson, this is going to give us a position of where the ship is located.

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And you can try that as well in the console.

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And you can see that that's going to return back where its position is according to where it's located

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on the screen.

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So this will change depending on where you move it.

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And then if we go back to here and if we offset at sea change to 69 there.

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So we're getting the midship offset left position.

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And then what we want to do is we want to start at a roughly halfway into my ship and the way that we

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can do that is using the offset width and this time dividing it by two.

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So that will give us roughly halfway positioning of where our exposition is and then also for the Y

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position.

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So this one is going to be a little bit easier to set because we're just using the position of the ship.

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So this is going to be our default position of where the firing is starting and we can use offset top

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and do a minus 10 on that.

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So the next thing that we want to do is we don't want it showing up here on the top left hand corner.

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We want it to show up.

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And this is where we update its style properties.

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So updating its left position.

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So just like we did with the ship, we're taking fire me.

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And this is X position.

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Plus pics, and this one should be the Y position and to do adjust the vertical, we're going to use

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top and Y position.

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So let's see what happens.

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So hit start.

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And now this is the starting position of where it's going to place place it.

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And as you see, when I move it, if I hit spacebar than it, it places it there on top of my my ship.

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So wherever I've moved, that's where the starting position is.

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So the next thing that we need to do is create that action.

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And we already saw that in the last lesson where we could move the ship around and we can do the same

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thing and we can have this essentially firing as it's being projected out.

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And the other thing, too, that we want to listen for is we don't want to have the ability to add more

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shots so we can run the function or we can check to see if the value of fire or the value of player

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fire.

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And if player fire is false, then we're OK to add another shot.

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So let's see what happens.

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So now I should only be able to add at one time and it's not going to move.

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So that's what we want to do, because otherwise the player could constantly press the spacebar.

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It would readjust the positioning.

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So now we're ready to make the move with it and taking the fire me x position that we just set earlier.

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And actually we don't have to update the exposition.

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We only have to update the Y position.

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So taking that value and we can subtract it by a value of 15 and then take fire me.

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And selected style top and using that newly adjusted position, we can do y position and then don't

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forget to add the picks.

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Otherwise, it's not going to work.

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So see what happens now.

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So I hit the spacebar.

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It goes off the top.

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So we also want to check to make sure that the position is of fire me is not less than zero.

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And if it is that we just need to restart it.

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So we need to check to see if Fiame is greater than zero.

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And if it is, then we're good to subtract off of it.

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But if it's not, then that means that we've gone off screen and it was a miss so we can change the

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play fire boolean value back to false and that will reset it and allow the player to fire again and

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then fire me.

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And as we.

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Remove the class of hide, let's add in hide, so it's no longer going to be visible on the screen for

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the player.

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So even though it's right now it's going to be off the screen, the player either way isn't going to

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be able to see that.

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And we can also, just to be sure, we can readjust the position of fire me y position and we can set

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it to use in the container demn height plus one hundred so we can set its default position way outside

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of the visible area for the player and fire me y position is the one that's greater than zero.

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So we've got to make sure that those variables are checked properly.

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So now we're ready to try that out.

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So now when we start the game, we can fire, but we can only have one projectile on screen at a time.

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And you can see that once it goes off the screen that I can launch another one.

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So it does look fairly quick, but there's only one on the screen at a time and it's always the same

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one.

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It's that same element that we created.

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So go ahead and add this into your project and we're going to be ready to move on to the next step.

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We're going to clean up the start game and initiate the creation of the aliens, the bad guys.

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That's all.

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Still to come, an upcoming lesson.