How to simulate the underwater and fire effect with Java3D

Hi...My project is a Java 3D game and it need to have underwater and fire effect, but I dont know how to simulate them with Java3D best..Can anyone give me some ways to make them..thank..

You'll have to describe what effect you are looking for. Are you trying to model the surface of the water or do you want your scene to appear to be under the water? A surface can be done similar to a terrain but with transparency added to the geometry. Underwater effects would be tough if you want to distort the view of the scene. You might be able to get away with changing the field of view to be wider or rendering each frame yourself.
For fire effects, are you looking for animated flames? If so there are a few options.
1. Find a series of images of a fire and apply them to an OrientedShape3D through animation. This would be easiest.
2. Build a particle system with fuzzy objects (procedural texturing). This would be much harder but more realistic.
Mike

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I am confused!!
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How to simulate the underwater and fire effect with Java3D

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