Instanced tesselation displacement

vvvv beta question
1

Hi,

I want to find a way how to make instanced tesselation displacement with multiple textures and dynamic level of detail.

It’s still a way to go and right now I am stuck with the instancing.

Basically the grid geometry is instanced. I am not sure if the instancing index gets through the tesselation gfx, maybe that is the issue why it shows only one tile of the water that I use for this test patch.

If anyone has an idea whats wrong or a direction how i could use multipe textures for the displacement, thanks!

Cheers

Tesselation Instanced Displacement (104.9 kB)

2

update

okey I got the instancing to work… it is possible to make large amount of displaced meshes - pretty cool.

Everything happens in the tesselation gfx now.

Now im stuck on the next step:

Displacing every instance with a seperate texture from an texture array.

I created the texture array which is sampling from one single texture.

There is simply a test texture array right now with n numbers.

Have a look in the domain shader - I think there is the twist

float vHeight = tex.SampleLevel(linearSampler,float3(Tc.xy,slice), 0) * cAmb;

p += n * (vHeight * DisplacementFactor);

Instanced Tesselation Texture Array WaterExample.rar (108.5 kB)

3

Okey it seems like the sampling of the texturearray just doesnt work in the domain shader as expected.

Does someone know how it could be possible to sample textures from a 2d texture array?

float vHeight = tex.SampleLevel(linearSampler,float3(Tc.xy,SLICE), 0)

According to this it should work like this SampleLevel (DirectX HLSL Texture Object) - Win32 apps

I can not use the function SAMPLE in the domain shader. So I can not just copy the way how it is done in the TextureArray helppatch.

If I use a manual array (Texture2D texN) I can not use dynamic indexes for the sampling - So only the TextureArray is an option.

Also I can not bring the Instance ID in the domainshader … SV_InstanceID gives error - no ds5.0 supported semantic

Check it out guys it is only this line of code left for infinite terrain generation.

4

well u can pass it as variable from vs

Texture2DArray texture2d;
float4 col = texture2d.Sample(linearSampler,float3(input.uv.xy,index));

and u need type uint i think