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byNici
byNici wrote ...

2020/9/25

Is there an alternative to setLocation that uses the type double?

byNici byNici

2020/9/25

# 
import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)

public class Player extends Actor
{
    int speed = 5;
    int moveX;
    int moveY;
    
    public void act() 
    {
        Input();
        if(moveX != 0 && moveY != 0)
        {
            setLocation(getX() + moveX * speed * Math.sqrt(2), getY() + moveY * speed * Math.sqrt(2));
        }
        else
        {
            setLocation(getX() + moveX * speed, getY() + moveY * speed);
        }
    }    
    
    public void Input()
    {
        moveX = 0;
        moveY = 0;
        if(Greenfoot.isKeyDown("a"))
        {
            moveX = -1;
        }
        else if(Greenfoot.isKeyDown("d"))
        {
            moveX = 1;
        }
        if(Greenfoot.isKeyDown("w"))
        {
            moveY = -1;
        }
        else if(Greenfoot.isKeyDown("s"))
        {
            moveY = 1;
        }
    }
}
So i'm trying to normalize the vertical movement and figuerd that I just have to multiple the vector by the squareroot of 2 but Math.sqrt(2) gives back a double and that does'nt match with setLocation because it needs an integer. Any help?
danpost danpost

2020/9/25

#
byNici wrote...
Is there an alternative to setLocation that uses the type double?
There is not -- at least, not among the methods given in the greenfoot package. However, that does not preclude you from making one yourself; or from importing a class that does have one. The SmoothMover class has a setLocation(double, double) method. Use the menu bar commands "Edit >> Import class ..." and select it. Then have your Actor subclass extend it. You will then have to modify your code to make use of it.
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