Vertex Displacment Map

[pyrrr]

After many attemps to create a displacment shader based on a heightmap i surrender.
it seems to be no posibility to get access to the luma values into the vertex shader.

my second attempt was to create an array which holds the height values but on 320*200 i will need at least 64k values. so - no solution here

if there any other solution for it ? maybe i just a blockhead.

[Karol]

Did you notice the Parallax Occlusion shader demo in the HLSL Shader help scene?

[pyrrr]

sure but i need real geometry displacment

[pyrrr]

[pyrrr]

well i guess there is no possibilitys to do that in ventuz - aye?

[GlareTechnologies]

Hello,

first of all, not all texture formats are supported within a vertex shader (HLSL V3.x). As far as i know A8R8G8B8 is not supported.
Beside that texture fetch must be done with tex2Dlod.

However, I am still struggling to get my shaders running in Ventuz. So I have attached an archive with a small example.

Explanation:
- A 256x256 texture with TexGen gets created and rendered into a render target with float 32 bit red format.
- I create a rectangle with tesselation. Now a shader (vertex shader) tries to manipulate the vertices via this generate texture

Alex and/or Karol, please be so kind and tell me whats wrong with it.

Cheers,

Bastian