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Index › Programming Questions & Help › Syntax Questions › Problem understanding array
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Problem understanding array (Read 268 times)
sohxuanhong
Problem understanding array
Nov 9th, 2008, 4:01pm  
I got 2 problem and really in need of help to solve it.

1.
 Is there any way that I can call files directly from the data folder..? because after i look through some example but i totally can't understand. =x

2.
 I am trying to write a array which i can load mutiple level and create a loading of random files. I know my problem is the code i wrote on the 1st line, but I think I wrote it wrongly that's why it doesn't work out. Can anyone please tell me my mistake.



//Problem in loading the ImageNO array
PImage BGImg [int(new ImageNO = 0)];
   
     

String BGImg1FileNames[] = {

"levelOne/0.jpg",
"levelOne/1.jpg",
"levelOne/2.jpg",
"levelOne/3.jpg",
"levelOne/4.jpg"

};


String BGImg2FileNames[] = {

"levelTwo/0.jpg",
"levelTwo/1.jpg",
"levelTwo/2.jpg",
"levelTwo/3.jpg"

};

String BGImg3FileNames[] = {

"levelThree/0.jpg",
"levelThree/1.jpg",
"levelThree/2.jpg",
"levelThree/3.jpg"

};

//retrive Imageno. lenght
int TOTAL_IMAGES = BGImg1FileNames.length;
int TOTAL_IMAGES2 = BGImg2FileNames.length;
int TOTAL_IMAGES3 = BGImg3FileNames.length;


//image loading array
PImage[] BGCountImg = new PImage[TOTAL_IMAGES];
PImage[] BG2CountImg = new PImage[TOTAL_IMAGES2];
PImage[] BG3CountImg = new PImage[TOTAL_IMAGES3];




void setup()
{
 size(1024,768);
 
 
 for (int i = 1; i<TOTAL_IMAGES; i++){
     println("loading img "+i);      
     BGCountImg[i] = loadImage(BGImg1FileNames[i]);
     //println("timer count img" + timerImgFileNames[i]);
   }
   
  for (int j = 1; j<TOTAL_IMAGES2; j++){
     //println("loading img "+i);      
     BG2CountImg[j] = loadImage(BGImg2FileNames[j]);
   }
   
   for (int k = 1; k<TOTAL_IMAGES3; k++){
     //println("loading img "+i);      
     BG2CountImg[k] = loadImage(BGImg3FileNames[k]);
   }
   
     BGImg[1] = BGCountImg[int(random(TOTAL_IMAGES))];
     BGImg[2] = BG2CountImg[int(random(TOTAL_IMAGES2))];
     BGImg[3] = BG3CountImg[int(random(TOTAL_IMAGES3))];
     
     
}

void draw()
{

 image(BGImg[ImageNo],0,0);
 println("ImageNO" + ImageNO);

}

void mouseReleased()
   {
     ImageNO = ImageNO+1 ;
   }
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antiplastik
Re: Problem understanding array
Reply #1 - Nov 9th, 2008, 5:49pm  
This will load 3 images in an array :

Quote:
// declare an array of PImages
PImage[] myImages;

// initialize the array;
myImages = new PImage[3]; // say I want 3 images

// fill the array
for (int i = 0; i < 3; i++) {
 myImages[i] = loadImage("my_image_" + i + ".png");
}
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sohxuanhong
Re: Problem understanding array
Reply #2 - Nov 10th, 2008, 3:36am  
hey thanks antiplastik.
but that not i am looking for.. but thanks so much for your help. BTW i manage to found one of my solution for my second problem...

http://processing.org/learning/topics/directorylist.html

But I am still stuck with my 1st problem.
because right now i load all my image into 3 different array. but i am going to use another array to control this 3 array that's the array i can't really figure out.
which is the the 1st line of my code.
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PhiLho 
Re: Problem understanding array
Reply #3 - Nov 10th, 2008, 8:51am  
First problem: I see nowhere declaration of ImageNO. It looks like an integer, so you cannot do new ImageNO (this syntax is for classes).

From what I understand of your code, you should just declare:

int ImageNO;
PImage[] BGImg = new PImage[3];

and

void mouseReleased()
   {
ImageNO = ++ImageNO % 3;
   }

The % 3 is to avoid going beyond the limits of the array (cycling).
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« Last Edit: Nov 11th, 2008, 11:21am by PhiLho  »  
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sohxuanhong
Re: Problem understanding array
Reply #4 - Nov 11th, 2008, 10:27am  
hey really thanks so much for helping me out.
it work out in a way..=D
cheers..
thanks everyone for helping out..
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