RuggedTurtle

This is my first interpreter written in Rust. The program lets you control a turtle with specific commands. The program is primarily for teaching programming, by visualizing instruction graphically.

WebAssembly version

https://gyorgy0.github.io/RuggedTurtle-release/

Programming documentation

The program supports multiple commands for controlling the turtle's movement. Valid commands are some hungarian and english keywords.

Variable declaration

You can declare numbers as a variable or you can refer to a previously declared variable in a variable declaration.

• <variable_name> = variable value

Arithmetic operations

• + - addition (it adds two numbers or variables together)

• - - subtraction (it subtracts a number from another number or variable)

• * - multiplication (it multiplies a number with another number or variable)

• / - full division (it divides a number with another number or variable, it doesn't neccesarily produce an integer)

• : - integer division (it divides a number with another number or variable, it produces an integer)

• % - remainder division (it divides a number with another number or variable, it gives back the remainder)

Commands

• forward(number of pixels that needs to be travelled by the turtle)
  Aliases: e(), elore(), f(), forward()

• right(angle in degrees, it specifies how much it needs to rotate to the character's right side 0-360)
  Aliases: j(), jobb(), jobbra(), r(), right()

• left(angle in degrees, it specifies how much it needs to rotate to the character's left side 0-360)
  Aliases: b(), bal(), balra(), l(), left()

• pencolor(red channel 0-255, green channel 0-255, blue channel 0-255, alpha channel 0-255) - specifies the color of the line e.g. (0,0,0,255) - black, (255,255,255,255) - white. (255,255,255,255) - transparent
  Aliases: tsz(), tollszin(), szin(), pc(), pencolor(), color()

• penwidth(width of the pen in pixels, greater the value the thicker the line left behind)
  Aliases: tv(), tollvastagsag(), vastagsag(), pw(), penwidth(), width()

• penup - the turtle lifts up it's pen from the canvas so it doesn't paints it's path on the canvas
  Aliases: tf, tollfel, pu, penup

• pendown - the turtle puts down it's pen so it leaves it's path behind
  Aliases: tl, tollle, pd, pendown

• evaluate(<variable>) - simplifies and prints out the value of the specified variable
  Aliases: kier(), kiertekeles(), kiszamolas(), eval(), calc(), calculate(), evaluate()

• print(<variable>) - prints out the specified variable
  Aliases: ki(), kiir(), kiiratas(), print()

• clear - clears the terminal history
  Aliases: trl, torol, clr, clear

• reset - resets the application
  Aliases: alaphelyzet, reset, default

• help - prints out the commands and their usage
  Aliases: ?, segitseg, help

Execution controls:

• repeat(variable, from, to (exclusive boundary - it goes until it hits the NUMBER BEFORE THE SPECIFIED number )) {commands}
  Aliases: i() {}, ism() {}, ismetles() {}, r() {}, rep() {}, repeat() {}, for() {}

Usage

rugged-turtle-usage.mp4

Graphics

Here are some commands and their effect on the turtle's movement.

for(i, 0, 200) {pencolor(55+i, 0, 55+i, 255); forward(30+i); right(59)}

for(i, 0, 200) {forward(100); right(59+i); forward(100)}

Arithmetics