custom vertex setup about imgui

[ocornut]

Typically you can iterate over the vertices and "convert" them. For a few thousands vertices per frame the cost is minor. But it an excellent idea - what I'll do is that I'll add a #define to disable the ImDrawVert structure definition and you can provide yours. It won't handle every case but some of them. Make it more likely that you can just memcpy.

[ocornut]

I looked into it today, was thinking adding
#define IMGUI_DONT_DEFINE_IMDRAWVERT_STRUCT
However there is the problem that imconfig.h is included before ImVec2 is defined.

Solutions I can think of now:

• Change it to force the user to declare the structure itself as a #define,
• Introduce a second "config" file included at the end of imgui.h
• Allow for a few hardcoded ordering selected via a define - I think it misses the point a little, being only half-flexible when you want to be fully flexible.

All of those are quite awkward! Don't know what to do yet.

[ocornut]

Done in 191e17e

You have to declare a macro called IMGUI_OVERRIDE_DRAWVERT_STRUCT_LAYOUT that develop to the struct type.

[mattiasljungstrom]

Thanks!