I want to add 25 objects at random locations. They need to be in the range of Greenfoot.getRandomNumber(5) + 2.
kiarocks wrote ...
2011/11/27
Adding Objects randomly
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Try: "whateverY" is the Y you need the objects to be at. The for loop should go ahead and create 25 objects, each with a random X, but the same Y. If you want them to have different Y, just do with "whateverY" like what was done with "randX".
for(int i=0; i < 25; i++) {
int randX = Greenfoot.getRandomNumber(5) + 2;
getWorld().addObject(whateverObjectYouNeedToAdd, randX, whateverY);
}the problem is getting them not to land on the same spot. Should have clarified that.
try:etc.
This should put five of each of five different objects randomly within your grid (with none at the same location).
int[][] objsGrid = { {5, 5, 5, 5, 5}, {5, 5, 5, 5, 5}, {5, 5, 5, 5, 5}, {5, 5, 5, 5, 5}, {5, 5, 5, 5, 5} };
for (int loopCt = 0; loopCt < 5; loopCt++)
{
for (int myCt = 0; myCt < 5; myCt++)
{
int x = Greenfoot.getRandomNumber(5);
int y = Greenfoot.getRandomNumber(5);
while (objsGrid[x][y] != 5)
{
x = Greenfoot.getRandomNumber(5);
y = Greenfoot.getRandomNumber(5);
}
objsGrid[x][y] -= myCt + 1;
}
}
for (int y = 0; y < 5; y++)
{
for (int x = 0; x < 5; x++)
{
switch(objsGrid[x][y])
{
case 0: addObject(new obj1(), x + 2, y + 2); break;
case 1: addObject(new obj2(), x + 2, y + 2); break;
This code would go in your world constructor and should not repeat. You could also put it in a method if you wanted to be called when certain conditions arise (of course, you would have to remove old objects before adding new ones).
You need it to only run once? Maybe you could put it into the addedToWorld(World world) method of that Actor(all Actors's addedToWorld(World world) methods are called when that Actor gets added to the world)
Or, if you want it to be added in later on, you could do something like this: Where timeUntilIShouldAddRandomObjects would be and integer that is set to the number of frames you want until the objects should be added, and addRandomObjects() is danpost's method of adding objects.
public void act()
{
timeUntilIShouldAddRandomObjects--;
if(timeUntilIShouldAddRandomObjects == 0) {
addRandomObjects();
}
//whatever your original act() method had
}
Maybe you could do a nested for loop, like:
If you wanted 40 objects(for example), you could set numOfRows to 4 and numOfCols to 10, or 2 and 20, or 5 and 8. This method will only work for a square grid of objects, though.
for(int i=0; i<numOfRows; i++) {
for(int j=0; j<numOfCols; j++) {
ObjectToAdd objToAdd = new ObjectToAdd();
getWorld().addObject(objToAdd, startX + i*spaceBetweenObjects, startY + j*spaceBetweenObjects);
int rand = Greenfoot.getRandomNumber(amountOfVariation);
objToAdd.setLocation(objToAdd.getX() + rand, objToAdd.getY() + rand);
}
}int[] maxObjs = { 4, 5, 6, 3, 7};
int[][] objNums = {5, 5, 5, 5, 5}, {5, 5, 5, 5, 5}, {5, 5, 5, 5, 5}, {5, 5, 5, 5, 5}, {5, 5, 5, 5, 5} };
for (int myObj = 0; myObj < 5; myObj++)
{
for (int myCt = 0; myCt < maxObjs[myObj]; myCt++)
{
int x = Greenfoot.getRandomNumber(5);
int y = Greenfoot.getRandomNumber(5);
while (objNum[x][y] != -1)
{
x = Greenfoot.getRandomNumber(5);
y = Greenfoot.getRandomNumber(5);
}
objsGrid[x][y] = myCt;
}
}I thought i did, then it got complicated. I need to add things in these denominations. (This was in a for loop.)
if(l < 2)
{
cw.addObject(new Light(),ints[l]*64,ints2[l]*64);
ints[l] = 0;
ints2[l] = 0;
}
else if(l < 8)
{
cw.addObject(new Wire(),ints[l]*64,ints2[l]*64);
ints[l] = 0;
ints2[l] = 0;
}
else if(l < 12)
{
cw.addObject(new Resistor(),ints[l]*64,ints2[l]*64);
ints[l] = 0;
ints2[l] = 0;
}
else if(l < 15)
{
cw.addObject(new Diode(),ints[l]*64,ints2[l]*64);
ints[l] = 0;
ints2[l] = 0;
}
else if(l <= 25)
{
cw.addObject(new EmptyCircuitArea(),ints[l]*64,ints2[l]*64);
ints[l] = 0;
ints2[l] = 0;
}There are more replies on the next page.
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