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processing4/java/examples/Topics/Simulate/SmokeParticleSystem/applet/SmokeParticleSystem.pde
benfry eb64b2d4fc
2011-01-26 19:22:19 +00:00

53 lines
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/**
* Smoke Particle System
* by Daniel Shiffman.
*
* A basic smoke effect using a particle system.
* Each particle is rendered as an alpha masked image.
*/
ParticleSystem ps;
Random generator;
void setup() {
size(640, 200);
colorMode(RGB, 255, 255, 255, 100);
// Using a Java random number generator for Gaussian random numbers
generator = new Random();
// Create an alpha masked image to be applied as the particle's texture
PImage msk = loadImage("texture.gif");
PImage img = new PImage(msk.width,msk.height);
for (int i = 0; i < img.pixels.length; i++) img.pixels[i] = color(255);
img.mask(msk);
ps = new ParticleSystem(0,new Vector3D(width/2,height-20),img);
smooth();
}
void draw() {
background(75);
// Calculate a "wind" force based on mouse horizontal position
float dx = (mouseX - width/2) / 1000.0;
Vector3D wind = new Vector3D(dx,0,0);
wind.display(width/2,50,500);
ps.add_force(wind);
ps.run();
for (int i = 0; i < 2; i++) {
ps.addParticle();
}
}