Vapors: clouds, steam, smoke
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I wanted to hang some small clouds in the sky behind Biplane to make his loops more clear. Didn't figure that one out.
Anyone had any success with clouds, airplane sky-writing, smoke coming out of a locomotive, steam from a kettle?
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Particle effects. Been tempted - but I'm not good enough with the math.
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i think your best bet would be with some decent textures, perhaps created in something that has proper particle effects like vue or blender.
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I had an idea where you created a volume, and the volume would be populated by CPoints. Then the CPoint could be toggled on and off to be replaced with components.
In 3DsMax I made some smoke effect by making the particles into a face, facing the camera, with a white circle on transparent background. Simple effect.
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Working out if a Point3d is inside a 'volume' is quite easy - it's been discussed here recently.
Making a random Point3d [so that the xyz stays within the volume's bounds] is also relatively easy.
Making a number of these by looping till a 'density' is reached is also easy.
Placing cpoints at these Point3d is also easy.
As is making a faceme 2d-rectangular semi-opaque 'dot' [png] component that is then swapped with these cpoints is also quite easy...
So let's do it...
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that ray tracing thing?
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Of course you can simply miss out the cpoint steps and use something like
tr=Geom::Transformation.new(point3d) cloud_group.entities.add_instance(dot_component,tr)
inside the point3d generating loop... -
@thomthom said:
that ray tracing thing?
Yes - and since you will make the 'volume' first it should be 'watertight' ?
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You can obtain a fairly quick and basic effect by using gradient transparency pngs in front of the camera as here
http://forums.sketchucation.com/viewtopic.php?f=81&t=23368&p=198149#p198149
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