ruilx/jslogo

Using JS language to parse a LOGO-like programming language and rendering on a Qt graphics module.

JsLogo

^{(A project using JavaScript does Logo language's do)}

Using Qt builtin Google V8 JavaScript-Engine as a flexible script using in C++

^{(A demo to test the @RPGV2's scenarist executing script)}

JSLogo's common snapshot

Installation

This project is based on QtSDK version 5.10, and you can compile the project using any version of Qt5 environment.

To download this project, please using:

	git clone https://github.com/Ruilx/JsLogo

and 'cd' in JsLogo, then:

	qmake
	make qmake_all

and finally 'make'(or with MinGW make 'mingw32-make') the project.

	make -f Makefile.Release

JsLogo's Functions

Using JavaScript to control a "turtle" to draw shapes, and command like @Logo-language.

The code had already built a JS object "turtle" to do the logo command.

• Turtle movement
  • Go forward (forward, fd)
  • Go backward (backward, bk)
  • Go home (home)
  • Go to any coordinate (setX, setY, setXY)
• Turtle rotation
  • Turn left (left, lt)
  • Turn right (right, rt)
• Turtle drawable
  • Pen down (penDown, pd)
  • Pen up (penUp, pu)
• Turtle penstyle
  • Pen width (setWidth)
  • Pen color (setPenColor, setPC)
  • Background color (setBackground, setBg)
• Turtle visible
  • Show Turtle (showTurtle, st)
  • Hide Turtle (hideTurtle, ht)
• Math Calculating
  • Trigonometric functions / Inverse trigonometric functions
  • Logarithm
  • Randoms
• Other functions

What the turtle does

Using object "turtle" can send the command to turtle on the screen

• Forward and backward

	turtle.forward(100);
	turtle.backward(100);

• Turn left and right

	turtle.left(90);
	turtle.right(90);

• Any coordinate and go home

	turtle.setXY(50, 50);
	turtle.home();

• Draw and release

	turtle.forward(50);
	turtle.penUp();
	turtle.forward(50);
	turtle.penDown();
	turtle.forward(50);

• Show and hide

	turtle.forward(100);
	turtle.hideTurtle();
	turtle.forward(100);

• Pen style

	turtle.forward(50);
	turtle.setWidth(10);
	turtle.forward(50);

• Initialization

	turtle.draw();

• Repeated

Because JavaScript has cyclic programming, the REPEAT command will replace by "for" or "while" in JavaScript.

• Complex drawing

	for(var i = 0; i < 36; i++){
		for(var j = 0;  j < 4; j++){
			turtle.forward(100);
			turtle.left(90);
		}
		turtle.left(10);
	}

Issues

I am grateful you to setup a issue or make a pull request if you found any issues in the project, and if you appreciate this project, please lightup a star on the right top of the page~

Many Thanks for your star~