Greenfoot

2012/5/4

#

he everyone, I have make two codes one code for drive an actore and one code to let an actore walk automatic, but how can I make the code so that the actor walk autmatic walk like the actor who I can drive code let an actor walk automatic

import greenfoot.*;  

public class student extends school
{
   
    public void act() 

    {
        
        move(4);
        if ( Greenfoot.getRandomNumber(101) < 15)
        {
            turn( Greenfoot.getRandomNumber(40)-20 );
        }

               if (atWorldEdge())
        {

            turn(15);

        }  
       
        if (Greenfoot.getRandomNumber(2000) < 5)
        {
            getWorld().addObject(new afval2(), getX(), getY());
        }   

    
    }

}    

code for drive the actor

public void processKeys()
    {

        if(Greenfoot.isKeyDown ("left")) {
            setLocation(getX() - 2, getY());
        } 
        else {
            setLocation(getX(),getY());
        }

        if(Greenfoot.isKeyDown ("down")) {
            setLocation(getX(),getY() + 2);
        }
        else {
            setLocation(getX(),getY());
        }

        if(Greenfoot.isKeyDown ("right")) {
            setLocation(getX() + 2,getY());
        }
        else {
            setLocation(getX(),getY());
        }

        if(Greenfoot.isKeyDown ("up")) {
            setLocation(getX(),getY() - 2);
        }
        else {
            setLocation(getX(),getY());
        }
    }

I hope somebody can help me

martijn13039

2012/5/4

#

I mean the actor move randomly but than like the second code

ttamasu

2012/5/5

#

Your post is confusing but I understand correctly you want to be able to use the same processKey method for the driver and walker. Just make a SuperClass and have driver and walker be a subclass of this class:

import greenfoot.*;  
public class SomeSuperClass extends Actor
{
    public void processKeys()
    {
        if (Greenfoot.isKeyDown("left")){
            setRotation(180);
            move(2);
        }
        else if(Greenfoot.isKeyDown("down")){
            setRotation(90);
            move(2);
        }
        else if (Greenfoot.isKeyDown("right")){
            setRotation(0);
            move(2);
        }
        else if (Greenfoot.isKeyDown("up")){
            setRotation(270);
            move(2);
        }
    }       
}

Then you just make two subclasses Driver and Walker of this superClass and put processKeys in the act method of both. The only difference is that you assign different default images for these classes

danpost

2012/5/5

#

@ttamasu, I think what martijn13039 wants is that the same actor, if not being controlled by keys, move randomly. @martijn13039, change your processKeys() method to the following

public boolean processKeys()
{
    int dx = 0, dy = 0;
    if (Greenfoot.isKeyDown("up") dx--;
    if (Greenfoot.isKeyDown("left") dy--;
    if (Greenfoot.isKeyDown("down") dx++;
    if (Greenfoot.isKeyDown("right") dy++;
    setLocation(getX() + dx * 2, getY() + dy * 2);
    return (dx !=  0 || dy != 0);
}

Then, in the student class act() method, at line 9, insert the following line

if (!processKeys()) {

and a '}' at line 22 (indent lines 10 through 21).

martijn13039

2012/5/5

#

hey thx for the reacties on my confusing qustion and danpost you are right what I mean and I have try you code but there stay cannont fint symbool method processKeys on the first code and I think I have make a stupid question but I can't find him

 public void act() 

    {
        if (!processKeys()) {  and a; }

        
        if ( Greenfoot.getRandomNumber(101) < 15)
        {
            turn( Greenfoot.getRandomNumber(40)-20 );
        }

       
        if (atWorldEdge())
        {

            turn(15);

        }  
        
        move(4);
        

        if (Greenfoot.getRandomNumber(2000) < 5)
        {
            getWorld().addObject(new afval2(), getX(), getY());
        }   

    
    }

public boolean processKeys() 
    { 
        int dx = 0, dy = 0; 
        if (Greenfoot.isKeyDown("up"))dy--; 
        if (Greenfoot.isKeyDown("left")) dx--; 
        if (Greenfoot.isKeyDown("down")) dy++; 
        if (Greenfoot.isKeyDown("right")) dx++; 
        setLocation(getX() + dx * 2, getY() + dy * 2); 
        return (dx != 0 || dy != 0); 
    }

danpost

2012/5/5

#

Your act() method should be:

public void act() 
{
    if (!processKeys())
    {    
        move(4);
        if ( Greenfoot.getRandomNumber(101) < 15) turn( Greenfoot.getRandomNumber(40)-20 );
        if (atWorldEdge()) turn(15);
    }   
    if (Greenfoot.getRandomNumber(2000) < 5) getWorld().addObject(new afval2(), getX(), getY());
}

Also, the act() method and the processKeys() method should both be in the same class (which I assume they are).

martijn13039

2012/5/5

#

now is the problem the act student don't walk automatic I can drive them with an other acter and I want the studen walk automatica but than like the actor who i can drive so they will not be able to walk on their heads and there is still the same error cannont fint symbool method processKeys I hope you understand what I mean i got this now

public class concierge extends school
{
 public boolean processKeys()  
   {   
     int dx = 0, dy = 0;   
        if (Greenfoot.isKeyDown("up"))dy--;   
       if (Greenfoot.isKeyDown("left")) dx--;   
      if (Greenfoot.isKeyDown("down")) dy++;   
      if (Greenfoot.isKeyDown("right")) dx++;   
       setLocation(getX() + dx * 2, getY() + dy * 2);   
        return (dx != 0 || dy != 0);   
    } 
}

import greenfoot.*;  

public class student extends school
{
   

    public void act() 

    {  
        if (!processKeys())  
        {      
            move(4); 
            if ( Greenfoot.getRandomNumber(101) < 15) turn( Greenfoot.getRandomNumber(40)-20 ); 
            if (atWorldEdge()) turn(15);  
        }     
        if (Greenfoot.getRandomNumber(2000) < 5) getWorld().addObject(new afval2(), getX(), getY());  
    }  

    
     
}

danpost

2012/5/5

#

You need to move the 'processKeys()' method to the student class.

martijn13039

2012/5/5

#

danpost I´ve done what you say but there stil is one other error there stay a red squir on if (!processKeys()) void typ not allowed her

import greenfoot.*; 

public class student extends school 
{ 
    public void processKeys()
    { 
        if (!processKeys()) 
        { 
            move(4); 
            if ( Greenfoot.getRandomNumber(101) < 15) turn( Greenfoot.getRandomNumber(40)-20 ); 
            if (atWorldEdge()) turn(15); 
        } 
        if (Greenfoot.getRandomNumber(2000) < 5) getWorld().addObject(new afval2(), getX(), getY()); 
    } 

    
}

danpost

2012/5/5

#

You must not realize that you can have more than one method in a class, or something. Why did you change the name of your act() method? did you mis-understand me? I think there might be somewhat of a language barrier here! This should be the code in the student class:

import greenfoot.*; 

public class student extends school 
{ 
    public void act()
    { 
        if (!processKeys()) 
        { 
            move(4); 
            if ( Greenfoot.getRandomNumber(101) < 15) turn( Greenfoot.getRandomNumber(40)-20 ); 
            if (atWorldEdge()) turn(15); 
        } 
        if (Greenfoot.getRandomNumber(2000) < 5) getWorld().addObject(new afval2(), getX(), getY()); 
    } 

    public boolean processKeys()
    {
        int dx = 0, dy = 0;
        if (Greenfoot.isKeyDown("up") dx--;
        if (Greenfoot.isKeyDown("left") dy--;
        if (Greenfoot.isKeyDown("down") dx++;
        if (Greenfoot.isKeyDown("right") dy++;
        setLocation(getX() + dx * 2, getY() + dy * 2);
        return (dx !=  0 || dy != 0);
    }
}

martijn13039

2012/5/5

#

danpost thx for your respond but my problem still is there because the stundent don´t walk automatic i can drive him if i put on the computer but he need to drive automatic but than like the code and not that he make rotaions

danpost

2012/5/5

#

Change 'processKeys() to:

public boolean processKeys()
{
    int dx = 0, dy = 0;
    if (Greenfoot.isKeyDown("up")) dy--;
    if (Greenfoot.isKeyDown("left")) dx--;
    if (Greenfoot.isKeyDown("down")) dy++;
    if (Greenfoot.isKeyDown("right")) dx++;
    setLocation(getX() + dx * 2, getY() + dy * 2);
    if (dx != 0) setRotation(0);
    if (dy > 0) setRotation(90);
    if (dy < 0) setRotation(270);
    return (dx !=  0 || dy != 0);
}

BTW, I tested the code.

martijn13039

2012/5/5

#

the problem stay because I drive the actor if i pus iskeydown up he go up but I want that the actor do that automatic

danpost

2012/5/5

#

I guess I do not understand exactly what you are wanting to do. Sorry :+(

martijn13039

2012/5/5

#

oow, I hope I can explain it better - In the code 2 I can move the conciere with my keyboord en he can only go left, right, up or down (so he walk normal - in code 1 can move een studen automatic but he kan walk very weird like on his had and I want he walk like code 1 go left, right, up or down but than automatic

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how can I make this two codes in one