Turtle Maze

Lua Programming Concepts

Variables

• Variables store a changeable value
• Meaningful variable names make code easier to read

Lua Programming Concepts (Cont.)

Functions

• Functions help simplify code, separating it by functionality and reducing repetitiveness.
• Meaningful function names make code easier to read

Lua Programming Concepts (Cont.)

Conditional ( If, Then, Else )

• If the condition is met then the block of code will run
• If the condition is not met then the else block of code will run
• If no else block in the condition and the condition is not met then the block of code in the condition will not run

Lua Programming Concepts (Cont.)

For Loop

for Variable = Start, End, Interval do
  --Code to be looped over
end

• Variable = Number that will track where we are in the loop. Typically called 'i' or something appropriate to the script
• Start = The number to indicate the start point for the loop. Typically will start at '1'
• End = Then number the loop will count to. How many times the loop will be run.
• Interval = An optional argument that will specify how much to increment

Lua Programming Concepts (Cont.)

While Loop

• The While loop will continue looping until a certain condition is no longer met.

Modulo (%)

• An operator that finds the remainder of division of one number by another
• Examples: 6 % 5 = 1, 7 % 5 = 2, 8 % 5 = 3, 10 % 5 = 0, 11 % 5 = 1

Lua Programming Concepts (Cont.)

math.random

• Math function that randomly picks a random number between the two provided numbers
• Example: math.random(5,10) will randomly select either 5,6,7,8,9, or 10.

math.floor

• Math function that drops the decimal and just provides the largest integer that is less than the original value.
• Examples: math.floor(2.6) = 2, math.floor(2.5) = 2

Insert Disk To Save Code Before Starting!

Start coding!

• Make sure you are creating the file in the disk directory!
• If you want to edit from a better editor like textmate or note pad. Then see appendix for details

Maze Code

Utility Functions

Stair Functions

Maze Functions

Main Code

Run Code To Create Maze

• Copy code from the disk to the turtle
• Change directory outside the disk to the copied code
• Put 64 glowstones in the last slot as shown
• Type the name of the file to run the code

Note: If turtle does not run you need to set turtle needs fuel flag to false or refuel the turtle.

Resources

• My email: joe.dean@gmail.com
• My Twitter: @joeddean
• Code: http://joedean.github.io/computercraft
• Slides: http://joedean.github.io/computercraft/presentations/maze.html

Thanks

• on-site.com: @onsitedotcom

Appendix I

Remove the need for Fueling a Turtle

Appendix II

Edit Program Outside of Minecraft