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FlyingRabidUnicornPig
FlyingRabidUnicornPig wrote ...

2013/3/30

Making ground like a wall

FlyingRabidUnicornPig FlyingRabidUnicornPig

2013/3/30

#
I'm working on a game, and currently I'm trying to make my character not run into walls. I understand how to do it with a Wall class, but I want to use my Ground class as a wall. I can't figure out how to do that though. I can make my character walk on ground, but I can't make it stop if he runs into it. I have two boolean methods, onGround() and inGround(). These methods are used to tell if he's on the ground, so it will walk on the ground, and inGround() is used so I can move him up (when he gets stuck in the ground). It would be easier to have a wall object, but I want to use ground so the character can jump on top of it, and walk, but he won't run inside of Ground. Here's my onGround() and inGround() methods, and my update() method:
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public void update()
    {
        if(onGround())
        {
            if (jumpTime <= DEF_JUMP_TIME)  //Makes it where you can only jump after a few seconds of being on the ground
                jumpTime++;
            else
                jumpTime = 0;
        }
         
        while (inGround())
            setLocation(getX(), getY() - 1);
 
        if (timeBetweenFire < DEF_FIRE_TIME)  //Makes it where you can only shoot after a few seconds at a time
            timeBetweenFire++;
    }
 
    /**
     * Checks if the player is on the ground.
     * @return true if Player is on the ground
     */
    public boolean onGround()
    {
        int height = getImage().getHeight();
        Actor ground = getOneObjectAtOffset(0, height/2, Ground.class);
        return ground != null;
    }
 
    /**
     * Checks if the player is in the ground
     * @return true if Player is in the ground
     */
    public boolean inGround()
    {
        Actor ground = getOneIntersectingObject(Ground.class);
        return ground != null;
    }
Everything I've tried to fix this problem either glitches him out (as this code currently does) or he just walks through the ground.
Game/maniac Game/maniac

2013/3/30

#
try this:
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public void update() 
{ 
    if(onGround()) 
    { 
        if (jumpTime <= DEF_JUMP_TIME)  //Makes it where you can only jump after a few seconds of being on the ground 
            jumpTime++; 
        else 
            jumpTime = 0; 
    } 
       
    while (inGround()) 
        setLocation(getX(), getY() - 1); 
 
    if (timeBetweenFire < DEF_FIRE_TIME)  //Makes it where you can only shoot after a few seconds at a time 
        timeBetweenFire++; 
} 
 
/**
 * Checks if the player is on the ground.
 * @return true if Player is on the ground
 */ 
public boolean onGround() 
{ 
    int height = getImage().getHeight(); 
    Actor ground = getOneObjectAtOffset(0, height/2, Ground.class); 
    return ground != null;  
} 
 
/**
 * Checks if the player is in the ground
 * @return true if Player is in the ground
 */ 
public boolean inGround() 
{ 
    Actor ground = getOneObjectAtOffset(0, height/2+1, Ground.class); 
    return ground != null; 
}
FlyingRabidUnicornPig FlyingRabidUnicornPig

2013/3/30

#
Still glitches out, basically your inGround() method is onGround(), but it adds one pixel. So now my character is floating. The glitch is like this: When he runs into a floating Ground, he'll be transported to the top of the block, because of my update code.
FlyingRabidUnicornPig FlyingRabidUnicornPig

2013/3/30

#
What i think would work is if I can see if there's a block right in front of him. The getOneObjectAtOffset() method works, but it looks all around the character instead of right in front of him or in a specific direction.
Game/maniac Game/maniac

2013/3/30

#
getOneObjectAtOffset() does not look all around the character, getOneObjectAtOffset() looks for an object at a specific point, getOneObjectAtOffset(0, getImage().getHeight/2, Ground.class) will look for Ground.class at the bottom middle of the characters image, getOneObjectAtOffset(getImage().getWidth()/2, 0, Ground.class) will look for Ground.class at the right middle of the characters image, and getOneObjectAtOffset(-getImage().getWidth()/2, 0, Ground.class) will look for Ground.class at the left middle of the characters image.
FlyingRabidUnicornPig FlyingRabidUnicornPig

2013/3/30

#
oh... I thought it looked around it, I'll try that out some more
FlyingRabidUnicornPig FlyingRabidUnicornPig

2013/3/30

#
Yay, that works! I have a few small problems, but I can fix those easily. Thanks for the help!
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