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DrDrake / osghimmel

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Apply sphere-map projection to the procedural cloud maps for better detail-density distribution #23

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
Currently, in each frame a high resolution texture is composed, based on 
multiple noise tiles with different octaves and resolutions each.
This is done to provide dynamic movement and shape dynamics for clouds.
There are several problems with this approach: Most of the detail is only 
required towards the zenith. At the horizon only a tiny fraction is required 
(first noise layer).

Simple idea: use sphere-map projection to provide a better detail distribution 
for the case of hemisphere mapping, that we obviously have here. This also 
allows to substantially lower the resolution (probably 1/8th of the area)

Original issue reported on code.google.com by costumebrother on 15 Aug 2012 at 4:00

GoogleCodeExporter commented 9 years ago 
Obviously sphere-map projection is not as well suited for this as paraboloid 
projection is  ;) - i accidentally the projections

Original comment by costumebrother on 15 Aug 2012 at 4:30