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m0401239

Push button to save multiple images.

in General Discussion » Other • 1 year ago

im making a digital etch a sketch and wanting to save all the sketches i create on it as PNG files. on an old sketch i did i could press S to save the image in my folder. the other problem with that was i could only save one image and it over ritten my old image. im wanting to press a button placed on my etch a sketch to save an image but then forget i saved that image and able to save another image.

if any once can knock up a dummy pice of code for me or has anything similar that i could use i would be very appreciative of it.

hope you guys can help.

Steven

1

Replies(20)

PhiLho

Re: Push button to save multiple images.

1 year ago

Either save the files with an increasing number in the name, or ask the user the name of the file with selectInput().

m0401239

Re: Push button to save multiple images.

1 year ago

how do i go about saving the file with an increasing number?

PhiLho

Re: Push button to save multiple images.

1 year ago

Have a global int variable, increment it before each save, use it in the file name, perhaps using nf() to get an uniform numbering.

m0401239

Re: Push button to save multiple images.

1 year ago

im sorry im still new to processing and im realy unsure what i need to do i dont understand what your saying.

Sorry. hope you can help me some more.

PhiLho

Re: Push button to save multiple images.

1 year ago

int counter; // That's the global int variable
void setup()
{
// Set up stuff
}
void draw()
{
// draw stuff
}
void mousePressed()
{
// Check mouseX/mouseY against button position/size
// Then if OK, save
counter++;
String fileName = "savedImage-" + nf(counter, 3) + ".png";
// Save image here instead
println(fileName);
}

m0401239

Re: Push button to save multiple images.

1 year ago

i tried to put this bit of code into my sketch to try it out on mousePressed. and i get this error.

processing.app.SketchException: unexpected token: void

at processing.mode.java.JavaBuild.preprocess(JavaBuild.java:326)

at processing.mode.java.JavaBuild.preprocess(JavaBuild.java:197)

at processing.mode.java.JavaBuild.build(JavaBuild.java:156)

at processing.mode.java.JavaBuild.build(JavaBuild.java:135)

at processing.mode.java.JavaMode.handleRun(JavaMode.java:176)

at processing.mode.java.JavaEditor$20.run(JavaEditor.java:481)

at java.lang.Thread.run(Thread.java:680)

not sure why its doing this?

m0401239

Re: Push button to save multiple images.

1 year ago

i see this is using a mouse press function. i have a pushbutton connected to digital pin 6 how do i get that button to save multiple times. i will be setting this up with no use of the mouse so all interaction needs to be with pushbuttons mounted on my etch a sketch.

thank you again for supplying this code.

Steven

PhiLho

Re: Push button to save multiple images.

1 year ago

Since we don't know how your push button is connected to your computer, and I am generally incompetent in hardware interactions (because I have only standard hardware: mouse and keyboard...), I can't answer. I hope somebody else has an idea.

m0401239

Re: Push button to save multiple images.

1 year ago

thanks for the reply i have used your mousepressed to save but i am unclear were abouts the image will be saved were do i go about saving it in my file under processing in my documents?

PhiLho

Re: Push button to save multiple images.

1 year ago

It saves in the sketch folder by default.
Instead of a file name, you can specify an absolute path.
Or for something more generic, use System.getProperty("user.home") to get the user's home directory path.

m0401239

Re: Push button to save multiple images.

1 year ago

it doesnt save in my sketch folder it just says it has saved in processing in the black dialog box. but i go to locate the saved files and there not in my saved sketch folder.

PhiLho

Re: Push button to save multiple images.

1 year ago

What black dialog box? I don't follow you. Show your current code (at least the parts relevant to your saving).

m0401239

Re: Push button to save multiple images.

1 year ago

the black section of the processing window were error messages are shown.

if(arduino.digitalRead(buttonPin3)==Arduino.HIGH)

counter++;

String fileName = "savedImage-" + nf(counter, 3) + ".png";

// Save image here instead

println(fileName);

}

}

message shown:

May 23 20:31:11 Stevens-iMac.local java[3358] <Error>: CGContextGetCTM: invalid context 0x0

May 23 20:31:11 Stevens-iMac.local java[3358] <Error>: CGContextSetBaseCTM: invalid context 0x0

May 23 20:31:11 Stevens-iMac.local java[3358] <Error>: CGContextGetCTM: invalid context 0x0

May 23 20:31:11 Stevens-iMac.local java[3358] <Error>: CGContextSetBaseCTM: invalid context 0x0

WARNING: RXTX Version mismatch

Jar version = RXTX-2.2pre1

native lib Version = RXTX-2.2pre2

savedImage-001.png

savedImage-002.png

savedImage-003.png

PhiLho

Re: Push button to save multiple images.

1 year ago

Oh well... Where I wrote the comment "Save image here instead", I meant you should use the save() function in place of the println(), which is there only for verification purpose, and doesn't anything beside writing messages in the console area of the PDE, indeed. My code was intended to show only the counter and file name building.

m0401239

Re: Push button to save multiple images.

1 year ago

ok brill i have used that pice of code that now looks like this.

if(arduino.digitalRead(buttonPin3)==Arduino.HIGH)

counter++;

String fileName = "savedImage-" + nf(counter, 3) + ".png";

// Save image here instead

save("Doodle");

this saved in my sketch folder now but when i go to save again it saves over the previous save.

i must say a big thank you for helping me out on this one.

PhiLho

Re: Push button to save multiple images.

1 year ago

save("Doodle");
must be replaced by
save(fileName);
that's the point of building a file name...

m0401239

Re: Push button to save multiple images.

11 months ago

rite i have done this.

//Save imagaes.

if(arduino.digitalRead(buttonPin3)==Arduino.HIGH)

counter++;

String filename = "savedImage-" + nf(counter, 3) + ".png";

save("filename");

within my sketch folder once i press the button to save it saves it is. filename.tif. but the code says it should save as a png, and im guessing the counter is counting how many saves i have saved. but this is not working. i have the global variable at the top.

so not sure whats going on.

PhiLho

Re: Push button to save multiple images.

11 months ago

Why did you added double quotes around filename? You have to learn to distinguish variable names from plain strings...

m0401239

Re: Push button to save multiple images.

11 months ago

i am terribly sorry like i said i am really new to this.

so i remove the " " from the file name. this allows the file to save every frame its not doing it the press of my button.

i really cant see whats going wrong i can see whats happening but it doesnt seem to be working.

m0401239

Re: Push button to save multiple images.

11 months ago

ok silly me. i had to change my button state to LOW.

but now my whole sketch is lagging. any way around it not lagging. iv looked to see how the files save the file looks as though its pre saving its made the file without me actually saving it and when i hit my button thats when its locking the file down as a save. should it do it this way? i think this is whats making it lagg.

thanks for the tips and code supplied PhiLho

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