Lab 9: Sprites and Walls
Goal: Create a landscape of wall objects that the user must navigate around to
collect coins. This will help practice using
for loops to create
and position multiple items.
Step 1: Start with one these examples:
Step 2: If you start with the examples, delete the current wall placement code. You want to create your own.
Step 3: Create a more complex arrangement of walls. Make sure the walls don’t allow the user to go off-screen. This is worth 6 points, based on how complex the arrangement. See Individually Placing Walls, Placing Walls With A Loop, and Placing Walls With A List for ideas. Just DON’T do the same thing as examples. Make it your own. Specifically, do NOT just copy the random wall-gap algorithm in the scrolling screen example.
Step 4: Update the graphics. Use multiple types of blocks for the walls. (See note below.) Change the character. This is worth 4 points, one point for each graphic used that wasn’t part of the base example. Remember to put a quick citation in your program just before you load graphics or sounds.
If you have more than one type of wall block, that’s great. But you don’t need more than one wall list. The physics engine requires all walls be kept in the same list.
Step 5: Add coins (or something) for the user to collect. 4 points, based on the complexity of the coin layout. Remember, you can place coins like we placed wall blocks. If you randomly place coins, you might end up with coins on top of walls. See the “Important Part” around line 83 or so of the example sprite_no_coins_on_walls.py for how to avoid this.
Step 6: Keep score of how many coins were collected, and display on-screen. 4 points.
Step 7: Add a sound to play each time the user collects a coin. 2 points.
Don’t move the player twice!
self.physics_engine.update() moves the player while checking
for walls. The command
self.all_sprites_list.update() will move the
player WITHOUT checking for walls. Don’t do both commands. You’ll end up
“walking through walls.” If you have other
sprites to update, update only those sprites. For example:
These aren’t required for the lab, but I’ve had students ask in prior years how to do these: