The helper function D3DXDeclaratorFromFVF will give you an array of vertex elements (which you can use to create a matching vertex declaration) from any FVF you can think of. These elements tell you the exactly how your struct has to look. For C++ there's also the offsetof macro to check if your offsets really match with your declaration/FVF.

You can also look at the SDK samples (or any other working sample) that still uses FVF to learn how a such a struct looks and works.

As an aside: Without the fixed function pipeline (shaders) you rather go the other way round: You first define your struct and then define a matching vertex declaration (since FVF isn't really, well, flexible).

The helper function D3DXDeclaratorFromFVF will give you an array of vertex elements (which you can use to create a matching vertex declaration) from any FVF you can think of. These elements tell you the exactly how your struct has to look. For C++ there's also the offsetof macro to check if your offsets really match with your declaration/FVF.

You can also look at the SDK samples (or any other working sample) that still uses FVF to learn how a such a struct looks and works.

As an aside: Without the fixed function pipeline (shaders) you rather go the other way round: You first define your struct and then define a matching vertex declaration (since FVF isn't really, well, flexible).

this function is awesome and really what i want

thanks a lot