59 lines
1.5 KiB
Plaintext
59 lines
1.5 KiB
Plaintext
|
import processing.opengl.*;
|
||
|
|
|
||
|
|
import mathematik.*;
|
||
|
|
|
||
|
|
import teilchen.Particle;
|
||
|
|
import teilchen.Physics;
|
||
|
|
import teilchen.force.Gravity;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* this sketch shows how to create and handle multiple particles and remove individual particles.
|
||
|
|
*/
|
||
|
|
|
||
|
|
Physics mPhysics;
|
||
|
|
|
||
|
|
void setup() {
|
||
|
|
size(640, 480, OPENGL);
|
||
|
|
smooth();
|
||
|
|
frameRate(30);
|
||
|
|
|
||
|
|
/* create a particle system */
|
||
|
|
mPhysics = new Physics();
|
||
|
|
|
||
|
|
/* create a gravitational force and add it to the particle system */
|
||
|
|
Gravity myGravity = new Gravity(0, 30, 0);
|
||
|
|
mPhysics.add(myGravity);
|
||
|
|
}
|
||
|
|
|
||
|
|
void draw() {
|
||
|
|
if (mousePressed) {
|
||
|
|
/* create and add a particle to the system */
|
||
|
|
Particle mParticle = mPhysics.makeParticle();
|
||
|
|
/* set particle to mouse position with random velocity */
|
||
|
|
mParticle.position().set(mouseX, mouseY);
|
||
|
|
mParticle.velocity().set(random(-20, 20), random(-50));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* update the particle system */
|
||
|
|
final float mDeltaTime = 1.0 / frameRate;
|
||
|
|
mPhysics.step(mDeltaTime);
|
||
|
|
|
||
|
|
/* remove particles right before they hit the edge of the screen */
|
||
|
|
for (int i = 0; i < mPhysics.particles().size(); i++) {
|
||
|
|
Particle mParticle = mPhysics.particles(i);
|
||
|
|
if (mParticle.position().y > height * 0.9f) {
|
||
|
|
mPhysics.particles().remove(i);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* draw all the particles in the system */
|
||
|
|
background(255);
|
||
|
|
stroke(0, 127);
|
||
|
|
fill(0, 32);
|
||
|
|
for (int i = 0; i < mPhysics.particles().size(); i++) {
|
||
|
|
Particle mParticle = mPhysics.particles(i);
|
||
|
|
ellipse(mParticle.position().x, mParticle.position().y, 10, 10);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|