phlogo::Turtle Class Reference

#include <Turtle.h>

Inheritance diagram for phlogo::Turtle:

List of all members.

Public Member Functions
virtual void	clear ()=0
virtual void	moveTo (int x, int y)=0
virtual void	lineTo (int x, int y)=0
virtual void	stroke ()=0
void	home ()
double	getX ()
double	getY ()
void	setXY (double x, double y)
double	getHeading ()
void	setHeading (double heading)
void	setPendown (bool pendown)
bool	getPendown ()
Protected Attributes
bool	_firstop
bool	_pendown
double	_x
double	_y
double	_heading
Friends
class	World

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Detailed Description

The turtle outputs graphics in the form of JSON data with operations that operate directly on a canvas in HTML.

Operations are:

"m:[x, y]" -> moveTo(x, y) "l:[x, y]" -> lineTo(x, y) "s:0" -> stroke()

Here is a driver program in JavaScript that will draw this data, given a canvas in the html called "canvas".

function canvas() { var ctx = document.getElementsByTagName('canvas')[0].getContext('2d'); ctx.strokeStyle = "#00CC00"; ctx.lineWidth = 1; return ctx; }

function doop(ctx, op) { if (typeof(op.m) != "undefined") { ctx.moveTo(op.m[0], op.m[1]); } else if (typeof(op.l) != "undefined") { ctx.lineTo(op.l[0], op.l[1]); } else if (typeof(op.s) != "undefined") { ctx.stroke(); } }

var ctx = canvas(); for (l in gdata) { doop(ctx, gdata[l]); }

Definition at line 53 of file Turtle.h.

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The documentation for this class was generated from the following files:

• /Users/paul/Documents/phlogo/core/Turtle.h
• /Users/paul/Documents/phlogo/core/Turtle.cpp