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Terrain LOD tessellation cracks


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#1 glararan   Members   -  Reputation: 254

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Posted 02 June 2014 - 12:20 PM

Hi,

 

I have terrain based on level of detail. I'm using tessellation and I have cracks between each map. I have no idea how to fix this.

 

If someone have an idea please, share it with me. Thanks!

 

Below you can see cracks between map (red lines mean border of each map)

 

KjpGWDi.jpg



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#2 Waterlimon   Crossbones+   -  Reputation: 2864

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Posted 02 June 2014 - 12:54 PM

You need to either modify the higher LoD chunk to have the edge vertices align with the lower LoD vertices of the adjacent chunk (someone used different index buffers to do this, such that the correct indices for the cracks not to appear can be used depending on the LoD levels of the adjacent chunks) or you need to use some kind of 'skirts' (between the chunks, connecting the two chunks together)

 

There are lots of resources online since this is a somewhat common problem so you should be able to find something using google.


o3o


#3 Promit   Moderators   -  Reputation: 9005

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Posted 02 June 2014 - 01:25 PM

Take a look at these search results. Lots of help in there.



#4 glararan   Members   -  Reputation: 254

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Posted 02 June 2014 - 01:41 PM

Thanks.



#5 Tasaq   Members   -  Reputation: 1311

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Posted 02 June 2014 - 02:03 PM

Are you using hardware tessellation? If so, can you share the code?






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