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SPEAKER: All right.

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So now we have a fully functioning,
more or less, Mario game.

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Well, you know, without
the AI, without the levels,

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but the platforming
scaffolding is there.

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If you wanted to take
this code base and iterate

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upon it, which will actually
be part of the assignment,

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you're more than free
to do so, of course.

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In this update, you know we have a
screenshot, although it doesn't really

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mean much here because this
is just a sound-based update,

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we're going to add a music
track and sound effects.

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And actually, it's
really easy to do this.

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I'm going to go over to my code editor.

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Here's my map.Lua file.

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All we need to do, and this is
very similar to what we did before,

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is just add a new audio source,
which is what we did in Pong.

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Because music and sound effects
really aren't treated any differently.

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So right here, I've added
a sound such music.wav.

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I found a sound file on
freesound.org that allows

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you to use royalty-free music, which
is included in the distro you'll have.

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And all I'm doing is
declaring it as static.

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You could declare it as stream,
again, if you wanted to,

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but I'm declining it static
so it stays in memory.

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And so if we go down to the bottom of
the init function here for the map,

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you'll see that I have a
few other function calls.

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We have setLooping to true.

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I want the music to always keep
playing over and over again,

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even when it hits the end
because, otherwise, it'll

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be kind of weird for the music
to just kind of stop cold.

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The music is a little loud,
so we set it to 0.25 volume.

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So this is between zero and
one floating point value.

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So 0.25 is about a quarter of the
volume of the original soundtrack.

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And then, finally,
when we hit play, that

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actually triggers the
sound to start playing,

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as we've seen before when we did Pong.

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Now, we also wanted to add
some sound effects to the game.

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So over in the Player
class, I went ahead

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and created a table called
self.sounds with a jump, hit,

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and coin sound, which,
again, jump, hit, and coin.

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I used a BFXR to generate these sound
effects, as we saw at the end of Pong.

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And if we go across over to, let's say,
the idle stage, and we go to jumping,

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let's say over here.

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If we press the spacebar,
and we activate our jump,

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you can see that I'm calling the
jump sound here with colon play.

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And if we go down here, I'm just
going to do a search for colon play,

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just for ease here.

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So we are also keeping track of
whether or not we hit a block,

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and it is going from yellow to brown,
or whether it is already a brown tile.

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So we're checking to see whether
we have hit a jump block,

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or whether we've hit a jump block hit.

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And accordingly, we can play either
the coin sound or the hit sound.

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And those are the only sound
effects that we are adding to Mario.

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Let's go ahead and give
this a test run right now.

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[MUSIC PLAYING]

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So we spawned actually in front of
a pit there and almost fell off.

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If I jump, you can hear
the jump sound effect.

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Let's find a tile.

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OK.

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So there's no blocks.

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So I'm going to go ahead
and run it one more time.

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This is the part of a
procedurally generated landscape

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is you want to always have a block.

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So let's try it again.

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Here we go.

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This is perfect.

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We'll jump.

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We hit it.

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We got the sound of the coin.

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And now if I jump again,
you can hear that there

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was a little bit of a thud sound.

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So it's as a little bit of polish.

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It really kind of completes
the game, in my opinion.

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And I'm a big fan.

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And it feels really good to
have tied it all together

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and have something that feels more
or less complete and playable.

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So that was it for the Mario track and,
therefore, the end of the game's track.

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Now, there is an assignment associated
with this half of the track,

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just like there was for Pong.

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And this actually ties
back nicely to CS50 itself.

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In p set one, you implemented a
pyramid with Mario's hash marks.

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In this case, in the Mario
assignment here, we're

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going to have you implement an actual
pyramid that looks something like this.

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And then we want this to be
part of the level generation.

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And then anywhere else in
the level, you can either

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do it like here where it
goes straight to the flag,

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or you can put this in the middle
and then have the flag at the end.

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But either way, you need to add a flag.

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And we provided this
in the sprite sheet.

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There's an actual set of flags sprites
for the flag itself and the pole.

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And when Mario hits this flag pole,
when it touches it or goes past it,

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I want this to trigger some message
that says you have beat the game,

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or this is the end of the level.

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If you want to, you can
even re-trigger a new level,

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if you want to go sort
of above and beyond.

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But that'll be it for
the Mario assignment.

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So this is CS50.

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This was the game's track.

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It was a pleasure having you.

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See you next time.

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