slogo.instruction

Class Towards

java.lang.Object

slogo.GrammarElement

slogo.instruction.Instruction

slogo.instruction.Towards

public class Towards
extends Instruction

Changes the heading of the turtle to point in the direction of given coordinates

Field Summary

Fields

Modifier and Type	Field and Description
private GrammarElement	xCoord
private GrammarElement	yCoord

Fields inherited from class slogo.GrammarElement

gelementsToValue

Constructor Summary

Constructors

Constructor and Description
Towards(GrammarElement xcor, GrammarElement ycor) Represents a toward instruction

Method Summary

Modifier and Type	Method and Description
java.lang.Object	evaluate(Context c) Evaluate this language construct in some context.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

xCoord

private GrammarElement xCoord

yCoord

private GrammarElement yCoord

Constructor Detail

Towards

public Towards(GrammarElement xcor,
               GrammarElement ycor)

Represents a toward instruction

Parameters:

xcor - the turtles xcoor

ycor - the turtles ycoor

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

Returns:

a string representation of a Towards instruction

evaluate

public java.lang.Object evaluate(Context c)

Description copied from class: GrammarElement

Evaluate this language construct in some context. The evaluation may have side-effects, e.g., moving a turtle.

Specified by:

evaluate in class Instruction

Parameters:

c - is the Context of what we are evaluating

Returns:

the new heading of the turtle so that it points towards the given coordinates