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MAKING OF:

I Love My Bubble

Now we should have a nice pink bubble.

To better understand this let us take a look at how particles are emitted (generated).

Bubbles, bubbles, bubbles…

A particle system is a flow of particles over time. This means that they will begin to emit at the start frame and stop at the end frame. Between the start and the end frame every particle generated will just appear on the emitter and disappear when it dies. Did I say die? Yes, each particle also have a life time starting at the frame it is generated counting forward and when it has been in the scene for its Life Time number of frames it will just disappear.

We will create the bubbles with a particle system and for that we first need an emitter. The emitter object is sending out the particles from its vertices, faces or volume. Create a Cube with [SHIFT+A] and select Mesh>>Cube, name it Bubbles. In my scene I placed the Bubbles at X 0, Y 0, Z 0 and scale X 9, Y 9, Z 9. You can enter the Location and Scale directly in the Object window but we also need to set the Dimension to 18, 16 and 10. For some reason the Dimension can only be accessed from the Properties window. Bring up the properties window with [N] and do the changes in the Transform panel. If your box is solid you can toggle between wireframe and solid with [Z]. Since I, in the end, want to animate the bubbles gracefully floating in the clouds I need to plan how the particles are entering the scene. I only want the particles to float in from the sides and bottom-up. I also don’t want them to suddenly just appear and disappear in the camera view.

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So we will avoid having the particles being generated within our camera view and they must live long enough to not disappear in the camera view during the animation. Let us first attach a particle system to our newly created emitter Bubbles. Go to the Particle window add a new system.

and press the + button to

Leave the Type as Emitter but change Seed to 11. The seed only tells the randomizer how to initialize the random number generation. I found 11 generates a nice looking particle flow. Let us have a look at the Emission panel. We don’t want a forest of bubbles so change the Amount to 200. As I mentioned before we want the bubbles to float into the camera view so the idea is to let the camera view fit inside the emitter. If we then let the faces of the emitter generate the particles, they will be outside the camera view! To do this set Emit From to Faces and Random. But we are still not seeing any particles! This is because we are still on frame 1 in our animation.

Issue 28 | Jun 2010 - "Introduction to Blender 2.5"

Profile for BlenderArt Magazine

BlenderArt Magazine Issue 28 Blender 2.5  

The Blender 2.5 series has been out for a while now, and while it still is under going a lot of changes and refinement, it is stable enough...

BlenderArt Magazine Issue 28 Blender 2.5  

The Blender 2.5 series has been out for a while now, and while it still is under going a lot of changes and refinement, it is stable enough...

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