Processing 1.0 - Processing Discourse - storing pictures in an array

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storing pictures in an array (Read 1294 times)

rajmahal

storing pictures in an array
May 4^th, 2010, 4:25pm

Hi, I am a beginner and I am trying to build a clock that cycles through still images of a person growing older instead of having traditional hours minutes, and seconds displayed on the screen. The original post is here http://processing.org/discourse/yabb2/num_1272749406.html#3

My question is: What kind of data are pictures considered is it a string a number My pictures are all loaded up into the data folder. There are 60 of them, and they are called 1.jpg, 2.jpg... and so on, up until 60.

I have to have a working prototype of the clock by 9am EST (14 hours from now) and any help would be very much appreciated. I basically just need to know how to cycle through the images so that every second the image representing the seconds changes to the next image in the array, and the same for the minutes and hours.
thanks in advance for any help

ben_hem

Re: storing pictures in an array
Reply #1 - May 4^th, 2010, 6:36pm

if you have a different image for each second, you could call something like:

PImage[] secondArray = new PImage[60];
^ as a global array, outside of setup(). Then, in setup:
for (int i=0;i<secondArray.length;i++) secondArray[i] = loadImage("second" + i + ".jpg");

and in draw():
image(secondArray[seconds()],0,0);

same for minutes, hours, etc. Your filenames, in this example, would have to follow that "second35.jpg" format, and if you wanted you could put your images in subfolders like /seconds/ and /minutes/, and include those in the pathname when calling loadImage().

rajmahal YaBB Newbies Offline Posts: 12	Re: storing pictures in an array Reply #2 - May 4^th, 2010, 8:25pm Thank you Ben! so when I actually make the array and am adding the pictures to it, would it look like this? PImage[] secondArray = new PImage[60]; secondArray[0] = second1.jpg; secondArray[1] = second2.jpg; secondArray[2] = second3.jpg; or do I have to put double quotes around the filenames? thanks again for your help!

ben_hem

Re: storing pictures in an array
Reply #3 - May 4^th, 2010, 9:07pm

nope, that's your:
for (int i=0;i<secondArray.length;i++) secondArray[i] = loadImage("second" + i + ".jpg");

:)

(this is saying: make an integer i and cycle it from 0 to the length of the array of images. At each position, set the PImage at that point in the array to: the information loaded by loadimage(). The filename does need quotes, but in this case, it can be built in pieces: "second" + i + ".jpg" will run from second0.jpg to second59.jpg.)

rajmahal

Re: storing pictures in an array
Reply #4 - May 4^th, 2010, 9:17pm

Thanks Ben,

so I have this so far:

PImage[] secondArray = new PImage[60];

void setup() {
size (400, 310);
background (255);

//for statement that cycles through the seconds
for (int i=0; i<secondArray.length; i++) {
secondArray[i] = loadImage("second" + i + ".jpg");
}
}

void draw () {
image(secondArray[seconds()],100,100);
}

And it gives me this message: "The function seconds() does not exist."
Please forgive my total ignorance with this. I know this is something really simple but how do I fix this?
thanks

TfGuy44 Full Member Offline Posts: 209	Re: storing pictures in an array Reply #5 - May 5^th, 2010, 2:09am "The function seconds() does not exist." I think the problem is that the functions seconds() doesn't exist. Maybe you wanted the function second(), without a second 's'?

rajmahal YaBB Newbies Offline Posts: 12	Re: storing pictures in an array Reply #6 - May 5^th, 2010, 4:46am Thanks, totally missed that. I really appreciate all the help.

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