I'm making a game and i want to make it so that the enemy is on a platform and the enemy moves from one side of the platform to the other and back again. i also want it so the the enemy is continuously going back and forth.
student1 wrote ...
2018/4/2
Enemy Movement
Do you have any code written yet? I'm still new to Greenfoot but I'll try to help if I can.
Your enemy just needs a direction indicator -- a field that gives the current direction of movement and is used (1) when moving the enemy; and (2) to determine when to change direction:
// field int dir = 1; // movement code move(dir); // can be multiplied by a speed value // possible turning about code setLocation(getX(), getY()+2); Actor platform = getOneIntersectingObject(Platform.class); setLocation(getX(), getY()-2); int pX = platform.getX(); int pW = platform.getImage().getWidth(); if ((dir < 0 && pX-pW/2 >= getX()) || (dir > 0 && pX+pW/2 <= getX())) dir = -dir;
thank you danpost it works perfectly, now i just need to figure out how to make it change images when it gets to one side so that it looks like its turning
You could name your Image something like "enemy1" for the enemy facing right, and "enemy-1" for the enemy facing left.
Then you could add the following line of code into the if-statement danpost made for you:
That's just the most simple way I can think of. Another thing you could do is simply flip the image (I'm assuming you just want the image to face to the opposite direction).
What you could do then is:
if ((dir < 0 && pX-pW/2 >= getX()) || (dir > 0 && pX+pW/2 <= getX()))
{
dir = -dir;
setImage("enemy" + dir + ".png")
//Replace .png with whatever format your image is saved as.
}
if ((dir < 0 && pX-pW/2 >= getX()) || (dir > 0 && pX+pW/2 <= getX()))
{
dir = -dir;
getImage().mirrorHorizontally();
}
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