Launch Java Applet: PerlinParticle02

I started out trying to make a particle system to render snow falling. And I actually had pretty good results (what ended up as my GrooveFlakes sketch). But in the process I wanted to add a bit of “randomness” to the snowflakes, so I started investigating Perlin noise.

In this sketch, when you click on the applet, you can see the background cycle through the different noise maps:

  • The first background (in color), is the combined map, which is the ‘x-map’ in the red channel, the ‘y-map’ in the green channel, and the ‘z-map’ (speed) in the blue channel.
  • The second background is the “x-map”: Lighter values move particle the the right, darker values move particle to the left.
  • The third background is the “y-map”: Lighter values move the particles up, and darker values move the particles down.
  • The fourth background is the ‘speed map’ Lighter values speed the particles up, darker values slow the particues down.
  • The fifth background is… no background at all.
  • And finally, it loops back to the first background.

When the sketch starts, it generates the x, y, & z maps (each based on random Perlin noise) and saves them to an off-screen buffer. Then as the sketch runs, the particle queries its position on each map, and modifies its position based on the above rules.

PerlinParticle02 running with the combined RGB image in the background.

PerlinParticle02 running with no image in the background.

    • DarenGMcDougal
    • November 9th, 2011 12:04am

    I like your post Perlin the image background.Now I know how to make a particle system to render snow fall in.Thanks a lot.

    • Kathy
    • November 15th, 2011 4:08am

    It gives headache! hehehe Anyways, Nice Art! Its likes a shooting star!

    • Katherine
    • November 17th, 2011 5:30am

    Make sure that you can handle your headache and keep on moving hihihi Yeah its like a shooting star and illusion.

    • Irish Jade
    • November 18th, 2011 3:40am

    Great! Thanks for sharing us your particle system to render snow falling. More power!

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