6 replies to this topic

[arkerone]

Hello everyone,
I created a map using a heightmap and i have a question
how to correctly calculate texture coordinates for a texture that will be repeated on my map?

Thx!

[kauna]

Hi,

You can use the position of the vertex multiplied by some factor to get a texture to repeat over the terrain.

If you are using shaders you may so something like this in the vertex shader:

out.texcoord.xy = world_space_position.xy * factor;

where factor tells how many times the texture is repeated per 1 unit. If your units are meters and the factor is 1 , then the texture is repeated once every meter.

Cheers!

[arkerone]

Thx , i have another problem, the texture isn't the same color as on my original image. an idea of the problem?

[kauna]

Hi,

Can you be a bit more specific? Like are the colors totally different than you expect (for example some of the RGB channels are swapped) or the texture is too bright / too dark (for example issue with gamma correction).

A screen shot also could help out a lot. Like, what you have and what you are supposed to have.

Cheers!

[arkerone]

My texture :


And my map with the texture, the color is different :

[arkerone]

I fix this problem with

DXUTSetIsInGammaCorrectMode(false);

[kauna]

arkerone, on 25 February 2012 - 12:47 PM, said:

I fix this problem with

DXUTSetIsInGammaCorrectMode(false);

Probably that's enough for now, but if you want to do things correctly, you should load your diffuse textures using the sRGB flag.

Cheers!