Sign in at Scratch
Go To: http://scratch.mit.edu/
CoderDojo Indigo Studio
Go To: http://scratch.mit.edu/studios/585122/ and click Santa Delivery (Starter)
Click the "See inside" button
Notice the sections: Title, Instructions and Notes and Credits
Click the "Remix" button
This will make a copy of the project under your name
Rename the Project
It's a good practice to name your project something unique
Music Loop
Shortcut: You already have looping music code attached to your Stage!
Santa Sleigh Control with Keys
Shortcut: Rotation, Direction and Arrow keys control already coded...
Multi-Sprite Scroll Technique
Use 2 or more sprites animated at matched speed, but offset...
When moving sprite gets to its own end, it jumps back to other side.
Multi-Sprite Scroll Technique
Use 2 or more sprites animated at matched speed, but offset...
Mountains Sprite continuously scroll left (start x = 0), then loop.
Multi-Sprite Scroll Technique
Use 2 or more sprites animated at matched speed, but offset...
Mountains2 Sprite continuously scroll left (start x = 480), then loop.
We Need Houses!
Set up a few variables. Make House Sprite scroll left and loop... but it's too easy!
Variability: Random Wait Delay
Set a random number of seconds (1-4) to wait before a new house comes.
Variability: House Speed
We'll use the "modulo" (mod) math function to set house speed after every 4 houses.
Do You Want to Move a Snowman?
We'll use a slightly different technique to move our Snowman (and loop). (Note: multiply by -1 to move the Sprite Left.)
Set up the Present Drop Position
Initiatize PresentsDelivered variable count. Make a new Present always drop from Santa's sleight with Space key. (Note: Offset x position based on sleigh direction.)
"Drop" the Present!
Make the present fall (- y movement) with a repeat loop UNTIL a condition is met (touches house roof color OR gets to bottom of screen).
Did the Present get to the House?
If the Present DID hit the target house color, play a sound and add +1 to PresentsDelivered variable count. (Always hide the Present Sprite after!)
Squash the Snowman!
Go back to the Snowman Sprite and add a few code blocks to squash him when hit with a Present! (Just for mischievous fun!)
Remember the Broadcast?
Back on the House Sprite, you should have already added a "GameOver" broadcast message after 25 houses passed.
Let's Listen for the Broadcast
The EndMessage Sprite will hide itself and the PresentsDelivered variable at Start and show both when it receives the "GameOver" broadcast.
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