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Index › Programming Questions & Help › Syntax Questions › Exporting an applet

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Exporting an applet (Read 372 times)

SmeeZee

Exporting an applet
Dec 20^th, 2008, 12:10am

Hi there

I am just in the processing putting the finishing touches to two processing programs and want to upload them to the openprocessing site. I have exported them and all looks fine, I get a folder showing me the files etc. However when I test this in Firefox nothing comes on screen. The links to the code work fine etc.

I have created a very simple test (see below) which works fine in processing but when I export and view index.html in Firefox I don't see the ellipse? Any suggestions?

I am running this under Fedora, standard build, 9. I have corrected the preferences.txt issue as well.
void setup()
{
size(640, 400);

}

void draw()
{
fill(0);
ellipse(10,10,10,10);
}

SmeeZee

Re: Exporting an applet
Reply #1 - Dec 20^th, 2008, 4:22pm

Hi there

I found some interesting things.... I have moved over to Mac. Firstly if I view the code above in Safari I get a result! Not sure on what I need for Firefox to work, guessing OpenGL?

However, I have noticed that I can't specify certain objects based on variable values. Some code below...

int width = 70;
int height = 200;
int zoom = 3;
int gutter = 40;

void setup()
{
width = width*zoom;
height = (height*zoom)+gutter;
size(width, height);
size(210,640);
}

void draw()
{
background(255);
fill(0);
for (int i = 0; i < 5; i++)
{
ellipse(100+(zoom*i),100-(zoom*i),10,10);
}
}

The ellipse does not show in safari as it does when you run the application on my machine. In fact, the first size(width,height) also does not get recognised through an exported solution.

To confirm, when I export the app, I then browse to the index.html to view the visualisation in Safari.

Anyone seen this? Any suggestions, the code I want to publish has a lot of variables in shapes etc.

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France)	Re: Exporting an applet Reply #2 - Dec 20^th, 2008, 5:48pm See size(): "Do not use variables as the parameters to size() command, because it will cause problems when exporting your sketch." Processing parses the size() command to know what size to specify for the applet.

SmeeZee YaBB Newbies Offline Posts: 37	Re: Exporting an applet Reply #3 - Dec 21^st, 2008, 10:31pm Thanks for that, I admit I had not read that bit. I am learning to code from the book Visualising data. I, however, do apologise for not reading that. Thank you for your post.

PhiLho

Re: Exporting an applet
Reply #4 - Dec 22^nd, 2008, 8:48am

No problem, everybody is doing the same error, including me at the start: skipping the reference page because the usage seems obvious from the examples, perhaps missing the "fine print", trying to parametrize stuff which is, in general, a good thing to do... Here, it is somehow parametrized, but implicitly, by using Processing's variables width and height.
It is a bit limiting (eg. when we need to enforce a ratio, to add a margin like I saw once, etc.) but the feature (extracting the values) is useful and hard to impossible to do otherwise.

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