How do I move the object Square2 along the y-axis continually? What I mean is when it touches the top of the world, it goes down. Then, when it hits the bottom, it moves back up.
Thanks in advance!
OxiClean wrote ...
2013/4/17
How to move on the y-axis
1 2 3 4 5 6 7 8 9 10 11 12 13 | //add this variable 1stprivate int moving;//then in the constructormoving = 10//add this to act()int groundLevel = getWorld().getHeight() - getImage().getHeight()/2;if(getY() == 5) moving = 10;if(getY == groundLevel) moving = 10;setLocation(getX(), getY() + moving); |
Just tell it to do just that in the act method of the Square2 class; you only need one field to track the direction of movement (up or down: '-1' or '1').
The value of 'speed' in the last line can be hard-coded in place or declared as another field set to any positive value that is less than the value of 'buffer'.
1 2 3 4 5 6 7 8 9 10 11 12 | // first declare the field(s)private int direction = 1;// then the act methodpublic void act(){ int buffer = getImage().getHeight() / 2; if (getY() < buffer || getY() > getWorld().getHeight() - buffer) { direction = -direction; } setLocation(getX(), getY() + direction * speed); // see note below} |
Sorry, JetLennit -- I was working on this for a little while, debating adding the 'speed' variable or not. Forgot to refresh to see if anybody else posted before I posted.
It's fine, it is probably better that @OxiClean has more options to see which code he wants to use
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