55 lines
1.3 KiB
Plaintext
55 lines
1.3 KiB
Plaintext
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import processing.opengl.*;
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import mathematik.*;
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import teilchen.Particle;
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import teilchen.Physics;
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import teilchen.force.Gravity;
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/**
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* this sketch show how to create a particle system with a single particle in it.
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*/
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Physics mPhysics;
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Particle mParticle;
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void setup() {
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size(640, 480, OPENGL);
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smooth();
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frameRate(30);
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/* create a particle system */
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mPhysics = new Physics();
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/* create a gravitational force */
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Gravity mGravity = new Gravity();
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/* the direction of the gravity is defined by the 'force' vector */
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mGravity.force().set(0, 30, 0);
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/* forces, like gravity or any other force, can be added to the system. they will be automatically applied to all particles */
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mPhysics.add(mGravity);
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/* create a particle and add it to the system */
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mParticle = mPhysics.makeParticle();
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}
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void draw() {
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/* update the particle system. this applies the gravity to the particle */
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final float mDeltaTime = 1.0 / frameRate;
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mPhysics.step(mDeltaTime);
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/* draw particle */
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background(255);
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stroke(0, 127);
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fill(0, 32);
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ellipse(mParticle.position().x, mParticle.position().y, 12, 12);
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/* reset particle s position and velocity */
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if (mousePressed) {
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mParticle.position().set(mouseX, mouseY);
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mParticle.velocity().set(mouseX - pmouseX, mouseY - pmouseY);
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mParticle.velocity().scale(10);
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}
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}
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