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like a flash (Read 1002 times)

maber YaBB Newbies Offline Posts: 18	like a flash Jan 24^th, 2010, 5:07am how can I do to reveal a picture and remove it immediately like a flash? there is anyone who can help me? Thanks

TfGuy44

Re: like a flash
Reply #1 - Jan 24^th, 2010, 5:29am

Quote:

/// Directions: Click mouse, get flashed.

boolean flashHim = false;

void draw(){
  if( flashHim ){
    drawFlashyThing();
  }
  else {
    drawBoringThing();
  }
  flashHim = false;
}

void drawFlashyThing(){
  background(255,0,0);
  for(int i=0;i<20;i++){
    fill(random(128,255),random(128,255),random(128,255));
    rect(random(width),random(height),random(width),random(height));
  }
}

void drawBoringThing(){
  background(0);
}

void mouseClicked(){
  flashHim = true;
}

maber YaBB Newbies Offline Posts: 18	Re: like a flash Reply #2 - Jan 24^th, 2010, 5:51am This is fine but I wanted to know in particular how an image appears and disappears without using the mouse but automatically ....

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France)	Re: like a flash Reply #3 - Jan 24^th, 2010, 6:04am It depends on what criterions you want to make it appear. Can be as simple as: Code: void draw() { if (random(100) <= 1) { drawFlashyThing(); } else { drawBoringThing(); } } with the image appearing randomly roughly once every 100 frames.

maber

Re: like a flash
Reply #4 - Jan 24^th, 2010, 6:16am

this is my code...it is an animation...

int speedx = 20;
int speedy = 20;
int speeda = 8;
int speedb = 8;
int speedc = 10;
int x=640;
int y=640;
int ya=-130;
int a = 220;
int b = 5;
int c = 5;
int e = 300;
int f = 100;
boolean s= true;

void setup (){
size (640,479);
}
PImage []images = new PImage[9];

void draw (){
images [0] = loadImage ("sole.png");
image (images[0],91,522);
images[1]= loadImage("sfondo.png");
background(images[1]);
x-=speedx;
images [2]=loadImage ("dirigibile.png");
image (images[2],x,50);

if (x<=-300){
fill (#001600);
a = a + speeda;
ellipse (510, a, 3, 3);
}

if (a >=380){
a=380;
y-=speedy;
images[3]=loadImage ("nuvolaS190.png");
image (images[3],y,50);
ya+=speedy;
images[5]= loadImage ("nuvolaS170.png");
image (images[5],ya,40);
images[6]=loadImage ("nuvolaS180.png");
image (images[6],250,ya-90);
}

if (y <=400){
images[4]= loadImage("sfondopioggia.png");
background(images[4]);

speedy=0;
image(images[3],y,50);
image(images[5],ya,40);
image(images[6],250,ya-90);
images[7]=loadImage ("saetta100.png");
image (images[7],299,118);

e+=speeda;
f+=speedb;
images[8]=loadImage ("goccia10.png");
image (images[8],e,f);

}

}

The images[7] appears but after about two seconds should disappear and the rest remain the same ....
I apologize that the code is a bit messy Embarrassed

TfGuy44

Re: like a flash
Reply #5 - Jan 24^th, 2010, 7:57am

BEGONE, MESSY CODE!

Quote:

int speedx = 20;
int speedy = 20;
int speeda = 8;
int speedb = 8;
int speedc = 10;
int x = 640;
int y = 640;
int ya = -130;
int a = 220;
int b = 5;
int c = 5;
int e = 300;
int f = 100;
boolean s = true;
PImage images[];

void setup (){
size( 640, 479 );
images = new PImage[9];
images[0] = loadImage("sole.png");
images[1] = loadImage("sfondo.png");
images[2] = loadImage("dirigibile.png");
images[3] = loadImage("nuvolaS190.png");
images[4] = loadImage("sfondopioggia.png");
images[5] = loadImage("nuvolaS170.png");
images[6] = loadImage("nuvolaS180.png");
images[7] = loadImage("saetta100.png");
images[8] = loadImage("goccia10.png");
}

void draw (){

image( images[0], 91, 522 );
background( images[1] );
x -= speedx;
image( images[2], x, 50 );

if( x <= -300 ){
fill( 0, 22, 0 ); // #001600
a = a + speeda;
ellipse(510, a, 3, 3);
}

if( a >= 380 ){
a = 380;
y -= speedy;
image( images[3], y, 50 );
ya += speedy;
image( images[5], ya, 40 );
image( images[6], 250, ya-90 );
}

if( y <= 400 ){
background( images[4] );
speedy = 0;
image( images[3], y, 50 );
image( images[5], ya, 40 );
image( images[6], 250, ya-90 );
image( images[7], 299, 118 );
e += speeda;
f += speedb;
image( images[8], e, f );
}

}

Also, you only need to load the images once, in setup().

Right, now, what's still wrong with it?

maber YaBB Newbies Offline Posts: 18	Re: like a flash Reply #6 - Jan 24^th, 2010, 8:35am in the sketch images [7] should disappearafter it appeared . In practice the image is a lightning in the animation appears and disappears. I do not know how to give this effect ....

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France)	Re: like a flash Reply #7 - Jan 24^th, 2010, 10:02am The whole is redrawn each time draw() is called. So to make an image to flash, you must find out the conditions when it must appear on a given frame, and ensure the conditions are not meet again on the next frame (or n frames later). Can be every n frames, after n seconds, etc.

maber YaBB Newbies Offline Posts: 18	Re: like a flash Reply #8 - Jan 25^th, 2010, 4:04am I tried but if I do I will block other things

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France)	Re: like a flash Reply #9 - Jan 25^th, 2010, 4:55am Well, show what you tried, so we can see what conditions you mean to use.

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