Which methods can i use for that? i've already have an actor and it can walk around.
can i put other images next to the actor and how to do that?
The second problem is the footprint will disappear after 5 seconds.
aliso wrote ...
2012/2/19
how to creat footprint?
Create an actor class called 'Footprint' and each time the walking actor takes a step, add a footprint to the world (at his feet, of course). The Footprint class can then control its life. You can make if fade by adjusting its transparency, and when its transparency reaches a certain limit, remove itself. It would be a gradual change, so you probably need a counter to control the number of act cycles before the next change.
SO, basically, in the walking actors class, when a step is takenand the Footprint class have instance integer variables 'final int MAX_TIME = 100;' and 'int changeTimer = MAX_TIME;'. In the Footprint act() method
getWorld().addObject(new Footprint(), getX(), getY() + getHeight() / 2);
changeTimer--;
if (changeTimer == 0)
{
changeTimer = MAX_TIMER;
setTransparency(getTransparency() - 15));
if (getTransparency() < 50) getWorld().removeObject(this);
}Correction (need the image):
Also, MAX_TIME should probably be around 20, not 100; but depends on your scenario speed (20 is good for medium speed; a higher number would be neccessary for higher speeds.
changeTimer--;
if (changeTimer == 0)
{
changeTimer = MAX_TIME; // not MAX_TIMER
GreenfootImage img = getImage(); // this was missing
img.setTransparency(img.getTransparency() - 15); // had too many ')'
if (img.getTransparency() < 50) getWorld().removeObject(this);
setImage(img);
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