How to make particles with tails on the picture

Processing Coding Questions
1

Hi. I want to know how to make particles with tails on the picture? I try to do this. But it not work. :confounded:

2

searching on google should help you find what you are looking for. This is just one way of doing it.

int i = 0;

void setup(){
  size(500,500);
  smooth();
  noStroke();
  background(255);
}

void draw(){
  fill(255,25);
  rect(0,0,width,height);
  fill(0);
  ellipse(width/2 + i,height/2 + i,50,50);
  delay(100);
  i+=10;
}

take a look at the examples provided in the processing ide there is an example of how to make trails like this one, I just cant remember the name of it. Alternatively you would have to create an array or arraylist of a certain size to store the positions of whatever you are drawing and use the array to draw the shape you want.

1 Like
3

I agree. Your question is too broad. We don’t know whether they are birds or from a firework or fountain

4

Thanks bro! I got it.

5 
/**
 * Transparency. 
 * 
 * Move the pointer left and right across the image to change
 * its position. This program overlays one image over another 
 * by modifying the alpha value of the image with the tint() function. 
 */

PImage img;
float offset = 0;
float easing = 0.05;

void setup() {
  size(640, 360);
  img = loadImage("moonwalk.jpg");  // Load an image into the program 
}

void draw() { 
  if(frameCount%5 == 0)
  {
  fill(255,25);
  rect(0,0,width,height);
  }
  println(frameRate);
  image(img, mouseX, mouseY,50,50);  // Display at full opacity
  //float dx = (mouseX-img.width/2) - offset;
 // offset += dx * easing; 
  //tint(255, 127);  // Display at half opacity
 // image(img, offset, 0);
}

I changed some codes and this is the effect I want

3 Likes
6

So, is this solved now?

Congratulations!