HI,
I have a plane(2 faces, 4 vertices), and i tried to modify its UV setup.

i have a texture which contains 16*16 tiles, and i want to place the UV setup on one tile.

So i thought for the quick and dirty way, i use vec_to_uv. But somehow the effect does not apply.

for the "num" parameter, i use the vertex number of the mesh vertex and not the uv-vertex?
x/y are normalized 0..1 right?

so, shouldnt this setip the surface for the first tile in the upper left corner of the texture?

ah year got it working, stupid me:

1/16 is an integer division XD
it must be:

1.0/16.0

However, i noticed a problem with the texture filters. Imagine we have a dirttile on our sourcetexture and its surrounded by pure white. Now i place the uv quad on this tile.

In the engine, white very small stripes will occur between the tiles. Disabling filters helps, but sometimes a little white pixel pops up, not so noticeable but anoying.

I solved it, by correcting the uv quad position. Iam shrinking the quad by 0.001, which resolves the white line issue(even with enabled filters) but does not end in visible tiling. This seems to be a valid solution, anyone another idea or something why i shouldnt do this?