How to make an image disappear with a mouse move

Programming Questions

guillemor..

How to make an image disappear with a mouse move

in Programming Questions • 4 months ago

HI!!!!

We are very "amateur" in Processing stuff and we are trying to design I simple behavior:

We need to make and jpeg image desapear and apear with the mouse movement.

Do you know the code we must use?

This is what we have right now:

int a;

PImage img1;

PImage img2;

void setup()

{

size(900,600,P3D); // or however big you need.

img1=loadImage("554037_446371552108299_1763329318_n.jpg");

img2=loadImage("calma.jpg");

a=0;

}

void draw()

{

background(0);

noTint();

image(img1,0,0);

tint(255,255,255,a);

image(img2,0,0);

if(a<255)

a++;

}

we are waiting for your answer!!!!

Thanks a lot!!

Replies(3)

GoToLoop

Re: HOW TO MAKE AN IMAGE DESSAPEAR WITH A MOUSE MOVE

4 months ago

Processing has many event-triggered functions to deal w/ user input like mouse & keyboard.

Take a look @ reference -> http://processing.org/reference/

Here's your code using it to activate draw() only when mouse is moved:

PImage img1, img2;

final static String FILE1 = 
"554037_446371552108299_1763329318_n.jpg";

final static String FILE2 = "calma.jpg";

void setup() {
  size(900, 600, P2D);
  noLoop();

  img1 = loadImage(FILE1);
  img2 = loadImage(FILE2);
}

void draw() {
  background(0);

  final boolean whichOne = frameCount % 2 == 0;

  tint(-1, whichOne? frameCount % 0400 : 255);
  image(whichOne? img2 : img1, 0, 0);
}

void mouseMoved() {
  redraw();
}

alvar.0

Re: HOW TO MAKE AN IMAGE DESSAPEAR WITH A MOUSE MOVE

4 months ago

The logic would be to trigger the event when the distance between your current position and your new position is bigger than 1 pixel. That would mean the mouse is moving.

I'll let you with that, I think you should be able to come up with the code yourself.

PhiLho

Re: How to make an image disappear with a mouse move

4 months ago

Changed the subject to be lower case: no need to yell! (and fixed a "typo" too)

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