Wavefront .obj import /export vertex order

Andy · 23rd February 2020, 02:40 PM

Any change in the structure of the object will affect the list of vertices but if you are simply loading/saving, the order should be preserved.

There is one UV coordinate for each vertex reference, so in a way, the vertices are not important. A cube made from quads has 8 vertices but 24 UV coors (4 on each square side. If the cube is made from triangles, then there would be 6 UV coors on each side.

To copy a UV from one object to another, the object structure (well, the surfaces) would need to be identical. I suppose it would be possible to implement but I think the application would be limited. You're probably best duplicating the object and adjusting the vertices as desired.

23rd February 2020, 02:40 PM	#5
Andy Administrator Professional user Join Date: Jun 2003 Posts: 4,565	Re: Wavefront .obj import /export vertex order Any change in the structure of the object will affect the list of vertices but if you are simply loading/saving, the order should be preserved. There is one UV coordinate for each vertex reference, so in a way, the vertices are not important. A cube made from quads has 8 vertices but 24 UV coors (4 on each square side. If the cube is made from triangles, then there would be 6 UV coors on each side. To copy a UV from one object to another, the object structure (well, the surfaces) would need to be identical. I suppose it would be possible to implement but I think the application would be limited. You're probably best duplicating the object and adjusting the vertices as desired. Last edited by Andy; 23rd February 2020 at 02:46 PM.