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Creating and Calling Procedures Alice 3 Beta

This guide explains how to create and call procedures in Alice 3 Beta. Start by selecting "Class 'MyScene'," then navigate to "Procedures" and choose "Declare Procedure." Name your procedure and create parameters as needed, using an integer type for this example. Follow the steps to drag tiles and set parameters, ultimately demonstrating how to call your method and execute it with different integer values. Adjust parameters as necessary, showcasing the flexibility of your procedures and enhancing your programming skills in Alice.

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Creating and Calling Procedures Alice 3 Beta

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  1. Creating and Calling ProceduresAlice 3 Beta

  2. A few choices to be madeRight window, upper left hand corner start by clicking on Class “MyScene” button 1.Click “class” 2 Click MyScene 3 Click Procedures 4 Click Declare Procedure

  3. After requesting to create a procedure, Name it (any legal name)

  4. New Tab appears named with your new method name

  5. This example will use a parameter to be passed into method when the method is called Click on Add Parameter button Next click on Value Type arrow

  6. This example will use an integer Many other types are available

  7. This example “howHigh” keyed in as name of integer parameter Any legal name OK , name should relate to purpose of parameter

  8. Continue by clicking “OK” button

  9. New Button “howHigh” appears and “Add Parameter” button may be used to create other parameters as needed “howHigh” Add Parameter

  10. Many tiles can be dragged to the right in this example a Princess “move” was chosen This example chose “UP” Princess “Move”

  11. A number (an integer) place holder is picked 1.0 in this example

  12. Result of last 1 integer choice (1.0 is really just 1 an integer) Example Princess will move up 1 meter

  13. Integer “howHigh” button dragged toward the 1.0 placeholder Target for howHigh parameter

  14. “howHigh” dropped off on top of 1.0 replacing it

  15. Click on “run X” tab Then click on This a.k.a. Scene Find the method you want to call “princessMethod” in this example drag the tile to the right window

  16. Choose an integer “meters Princess will move UP” in this example “3” chosen as demonstration

  17. Result tile on right below an existing instruction. Call to princessMethod passing 3 “howHigh” parameter

  18. Next run program

  19. Result: Princess moves UP too far

  20. Call adjusted to “2” meters UPre-run program

  21. Princess now completely in frame

  22. Example has worked Method called correctly, adjusted when necessary • The method may be called many times and passed the same parameter (argument) or a different one each call.

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