Page 247 - Scratch Programming Playground

In that case, we need to undo the lift and the walking move-
ment. the change y by -8 and change x by -1 * steps blocks
undo the Cat sprite’s movement. Multiplying the walk input by
-1 gives the opposite number of the input and variable.

Gentle slope: The Cat sprite is Steep slope: The Cat sprite is
li ed eight steps and is no longer li ed eight steps but is still
touching the ground. The Cat sprite touching the ground. The Cat
can walk up this slope. sprite cannot walk up this slope.

this code is exactly like the code in the Maze Runner
game in Chapter 3 that blocks the player from walking
through walls.

Save Point

Click the green flag to test the code so far. Use the a and d
keys to make the cat walk around. the cat should be able to
walk up the gentle slope on the right, but the steep slope on
the left should stop the cat. Click the red stop sign and save
your program.
If you’re lost, open platformer3.sb in the resources ZIp file
and continue reading from this point.

MakING aN advaNCed pLatforMer 221