How to have an image randomly appear

dinal22

Hello - apologies in advance if this query has already been answered or isn't in the right format etc. etc. - I'm new!

I'm building a game where an animal collects carrots and apples which then gains points for the user. Whats the best way to have the images of a carrot and an apple appear at random?

Thank you!

Chrisir

you can say

int imgX, imgY; 

imgX=random(width); 
imgY=random(height); 

image(imgCarrot, imgX, imgY);

Chrisir

when your game is a grid, you need to make the random on the grid.

when your animal collects carrots you have to have an array or better ArrayList to store the carrots with position

dinal22

Thanks for this. My background is currently an image that gives the illusion that its moving.

imageMode(CORNER);
image(backImg, x, 0);
image(backImg, x+backImg.width, 0);

Is it possible to have a grid on top of this?

Chrisir

it sure is possible

but it is not necessary to have a grid

are the carrots supposed to move with the background? Probably.

Chrisir

old version

float imgX, imgY; 
PImage imgCarrot=null;

size(660, 500);

imgX=random(width); 
imgY=random(height); 

if (imgCarrot!=null) { 
  image(imgCarrot, imgX, imgY);
}
else {
  rect(imgX, imgY, 13, 12);
}

//

Chrisir

this version places the carrot in steps of 20

so when you are on a grid, it's on a grid

but you don't need a grid

just say

if (dist(animalX,animalY,carrotX,carrotY)<25) 
     println ("Hooray");

here the new version

float helperImgX, helperImgY;
float imgX, imgY; 
PImage imgCarrot=null;

size(660, 500);

helperImgX=int(random(width/20)); 
helperImgY=int(random(height/20)); 

imgX=20 * helperImgX;
imgY=20 * helperImgY;

println (imgX+","+imgY);

if (imgCarrot!=null) { 
  image(imgCarrot, imgX, imgY);
}
else {
  rect(imgX, imgY, 13, 12);
}

// -------------------------

dinal22

The carrots should appear at random so that they can be 'collected' by the user but the background is the only thing that moves. There is a horse which is moved by the user to collect the carrots...

dinal22

Ok cool thanks, I'll give this a go!