That worked great. Now if I add a public void eat, do I add a getColor and return color and then add the eat function?
anonymousse wrote ...
2014/5/7
Get an actor to change color
anonymousse wrote...
That worked great. Now if I add a public void eat, do I add a getColor and return color and then add the eat function?By the way, in my version (I programmatically created images for my actors), I reduced the size of the world to (33, 33, 20) and the images of the tiles to 60x60 and the image of the arrow to 18x18 (just under 20x20). That way the arrow will be able to move around the tiles along the edges and in between without touching them. I placed the tiles using this:
To try it out, you can scale your actor images in their constructors using 'getImage().scale(n, n);'.
for (int y=2; y<33; y+=4) for (int x=2; x<33; x+=4)
If an arrow is red, it can move onto only red tiles and blank tiles. Same thing with green, blue, etc. Once the tile is eaten, it would be replaced by a blank tile. I tried the following code:
But the arrow still eats everything in its path. Would I restrict the movement instead?
Also, whenever they are eaten, I notice they only get replaced by a white image with nothing on it. I have this code in the tile class:
And thought that would mean once it is eaten, the tile would just be replaced by the blank tile image.
Just saw your post, trying it out
public void eat()
{
Actor tile;
tile = getOneObjectAtOffset(0, 0, Tile.class);
if (tile !=null)
{
World world;
world = getWorld();
world.removeObject(tile);
}
} public void getEaten()
{
color = 0;
setImage("egg0.png");
} Your 'eat' method does not check for the color of the tile (yet). Also, you do not want to remove the tile; just change its image/color to blank. Actually, there is no need for an eat method. Since you need to control better where the arrow can go, you will already be finding out if a tile is present. You can either retract the move if the tile is not the correct color or eat the tile if it is, right there in the 'move' method.
How can I set limits for movement in the move function? Is there an if statement for that or a getImage?
Add the following to the end of the 'move' method:
Tile tile = (Tile)getOneObjectAtOffset(0, 0, Tile.class);
if (tile == null || tile.getColor() == 0)
{
return;
}
if (tile.getColor() != color)
{
setLocation(getX()-dx, getY()-dy);
}
else
{
tile.getEaten();
mutate();
}That worked great. How can we put null and 0 on the same booleon though and still get the arrow to move onto the blank colored tiles? I thought return meant the action would not be performed and is null referring to if the colors do not match and 0 to the blank tile?
anonymousse wrote...
That worked great. How can we put null and 0 on the same booleon though and still get the arrow to move onto the blank colored tiles? I thought return meant the action would not be performed and is null referring to if the colors do not match and 0 to the blank tile?I'm trying to get tiles to show up every few seconds so I added a counter actor and followed a tutorial on timing events. However I keep getting illegal start of expression. It's probably a really simple problem but I'm not understanding what I'm doing wrong. I added it to the arrow class.
import greenfoot.*; // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)
/**
* Write a description of class Arrow here.
*
* @author (your name)
* @version (a version number or a date)
*/
public class Arrow extends Actor
{
private Counter counter;
private int tileDelayCount;
public Arrow(Counter pointCounter)
{
counter = pointCounter;
tileDelayCount = 0;
}
/**
* Act - do whatever the Arrow wants to do. This method is called whenever
* the 'Act' or 'Run' button gets pressed in the environment.
*/
private int color;
public Arrow()
{
color = Greenfoot.getRandomNumber(5)+1;
setImage(new GreenfootImage("arrow"+color+".png"));
}
public int getColor()
{
return color;
}
public void addedToWorld(World world)
{
while (((Tile)getOneObjectAtOffset(0, 0, Tile.class)).getColor() != 0)
{
int x = Greenfoot.getRandomNumber(world.getWidth());
int y = Greenfoot.getRandomNumber(world.getHeight());
setLocation(x, y);
}
}
private void mutate()
{
color = Greenfoot.getRandomNumber(5)+1;
setImage("arrow"+color+".png");
}
public void act() {
move();
checkNewTile();
newTile();
}
public void move()
{
String key = Greenfoot.getKey();
int dx = 0, dy = 0; // the offsets from current location
if ("up".equals(key)) dy--;
if ("down".equals(key)) dy++;
if ("left".equals(key)) dx--;
if ("right".equals(key)) dx++;
setLocation(getX()+dx, getY()+dy);
Tile tile = (Tile)getOneObjectAtOffset(0, 0, Tile.class);
if (tile == null || tile.getColor() == 0)
{
return;
}
if (tile.getColor() != color)
{
setLocation(getX()-dx, getY()-dy);
}
else
{
tile.getEaten();
mutate();
newTile();
}
private void newTile()
{
tileDelayCount = 100;// check for illegal movement here and reset location adding negative offsets
}
private void checkNewTile()
{
if (tileDelayCount > 0) {
tileDelayCount--;
if (tileDelayCount == 0) {
createNewTile();
}
}
}
private void createNewTile()
{
int num = Greenfoot.getRandomNumber(15);
if (num > 5) num = 0;
addObject(new Tile(num), x, y);
}
}
}If you recall, tiles are not being removed when eaten; they just turn to a blank tile. So, adding tiles would be the wrong thing to do here. You could have the blank tiles count down a timer that is given a value within a specific range and, when its timer reaches zero, change to a random color.
Do I add a counter to the tile function? Since I don't have a blank tile class I'm sort of confused how to do that. I know I could refer it back to the mutate function but I'm confused on how I can call up the blank tile
Ok is there a way to add a double if statement for a single action? For instance, I have
And I want to add to the tileDelayCount == 0 a function for (tile.getColor() == 0) )
if (tileDelayCount > 0) {
tileDelayCount--;
if (tileDelayCount == 0) {
mutate();
}
} You need to login to post a reply.