There is a way to change the format of a vertex buffer ?

[coco875]

There is a way to change the format of a vertex buffer because I want to reuse the same buffer but just update it.

[LukasBanana]

Hi, can you please provide some more context in what scenarios you need to change the vertex format of a vertex buffer? I can see that it would be useful to have multiple formats for a single buffer to use a dynamic format on demand like it's possible with the index buffers (i.e. SetIndexBuffer(Buffer&, Format, uint64_t)). But changing the format, possibly every frame sounds like something that should be avoided.

BTW: I'm a bit slow in responding right now because I'm on vacation until earlier next week.

[coco875]

To reproduce the behavior of fast3d (the microcode of n64) we need to make more or less weird thing (don't really know how to describe it). But basically we send most of our data in vertex attribute (https://github.com/coco875/libultraship/blob/llgl-revert/src/graphic/Fast3D/interpreter.cpp#L1351), so depending of what are enable in option by the microcode it don't send the same format, I try just put them as uniform but it's slower. Also the format need to change multiple time in a frame.

[LukasBanana]

For prosperity, 9ce6648 adds a secondary SetVertexBuffer() function that allows to change the vertex format of a vertex buffer when binding it.