Updating texture

Sounds to me as if you should do the offsetting by manipulating the texture coordinates. Shifting the gfx inside the texture will always turn out to be a complete reload of the texture, at least to my knowledge.

If you do some terrain, you better split your geometry at regular intervals and assign portions of the texture to each of the segments. This way you can update and reuse isolated portions of the texture without moving the other portions. If you're out for clouds and such, just repeat the texture or sample it at several magnitudes, that's enough for good-looking perlin noise.

Just guessing from the texture. If you have something alltogether different in mind, describe it. To me it seems better we find a different solution to your problem, shifting gfx in a texture will be ineffective.

Bye, Thomas

I don't know the specifics of where the new data comes from, but consider looking into Render Targets. I don't have any links, but a Google search should find some info.

Icesaber

I would probably use two textures and render back and forth between them when I needed to shift the data.

Quote:

Original post by JasonBlochowiak I would probably use two textures and render back and forth between them when I needed to shift the data.

that would be very time consuming.. I don't think I can do that quite every frame :/

@Schrompf: yes, I'm doing terrains.. an approach like Hoppe's Geomipmapping, so I cannot split the texture in several parts, I have to update it all -___-'

Quote:

Original post by b3rs3rk @Schrompf: yes, I'm doing terrains.. an approach like Hoppe's Geomipmapping, so I cannot split the texture in several parts, I have to update it all -___-'

What a coincidence... Geomipmapping is another thing BTW.
Why cannot you shift texCoords? Then, the "released" zone could be computed (it would "move" inside the texture space) and filled. Ok, you really don't shift the texCoords obviously, you would modify them in the VS...

Shift the texture coordinate in the VS, and when setting the adressing mode in the pixel shader, set it to border.