Week 9 – 3/28/15

We will be well on our way to present our games at the STEM fest with this homework!  Please email Michael if you feel that you need help.
What I want you to get out of the assignment is that when you use glide you go from point A to pt B and you can’t effect the sprite as it glides. But if you use a loop and decrement the y position you can now put an if statement in the code. You already have all the code from the last class.
Assignment:

Please keep on working on your game for the STEM fest.

I have shared a project that you can use for the exercise. If you go to backdrops, you can find a background of an x-y axis. You might find this helpful.
1. Make an x and y axis on paper and plot the the following point (0,0), (1,1), (-3,-2), (5,-2)
Please use the shared link for the rest of the homework. The ball has two costumes: a blue and yellow costume.
2. In Scratch, make the ball  go to (100,100) using the blue costume.
3. Now make the  ball go from (100,100) to (100, -100)  using the glide command.
4. Now, what if we want the costume to change from blue to yellow  when  the y value is between 50 and -50.  If the ball is outside of 50 and -50, it should go back to blue. Can we do this using glide? Why not?
5.  Instead of using glide you can use a loop to move the ball. How do we have the costume change as specified in part 4?
Below is a representation of how the ball color should be changing based on its height.
Blue
Blue     —- change happens when y value is below 50
Yellow
Yellow
Yellow
Blue   —- change happens again when y value drops below -50
Blue

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