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Vegetation Research

Josh

Entry posted by Josh

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The Leadwerks 3 vegetation system is being designed to side-step the bottlenecks that limited the Leadwerks 2 vegetation system. The Leadwerks 2 system involved large collections of 4x4 matrices for each instance, resulting in hundreds of megs of data stored with the map. Eliminating this data results in small map sizes and reduction of memory usage.

 

Here we have 10,000 trees being rendered (with no billboards), for a total geometry count of 14 million polygons. Memory usage is...zero!

 

blogentry-1-0-44112600-1435710952_thumb.jpg

 

The framerate for this is 130 in debug and release mode, which tells me it's hitting the ceiling on the GPU vertex shader. Obviously we will use billboards to reduce the polygon count, but this tells me we're on the right track.

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Ma-Shell

Ma-Shell 165

Posted

Woah, that's impressive! :) On what hardware do you get the 130 fps?

Josh

Josh 16,119

Posted

GEForce 780. The polycount is ridiculous, and billboards will cut it down to a reasonable level. This shows that the system is being designed to eliminate the bottlenecks the old LE2 system had.

DerRidda

DerRidda 101

Posted

So it's billboards for the most distant vegetation, right? Will we see an automated LOD system for the distances closer than billboard distance?

 

That could allow for crazy dense vegetation.

Josh

Josh 16,119

Posted

LOD beyond billboards probably won't be necessary. At any given time, billboards tend to eliminate 95% of the polygon count, and further optimization beyond that doesn't result in much difference.

drarem

drarem 16

Posted

OOO vegetation??? awesome.

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