Just been doing a bit of playing with FireMonkey.
If I create a HD application, then I can add buttons etc as normal.
If I create a 3D application, when I add buttons/memo to the form they don’t show up.
This is XE2 running Windows 7 under VMWare Fusion (with 3d graphics enabled).
Is there any reason for an app to use an HD form if it’s not for graphics/games and it’s just a ‘business’ app with buttons/edits/memos?
What is the difference between them and why does it matter?
Reading Delphi XE2: Why FireMonkey apps are HD? didn’t help.
HD (or IMO better: 2D) and 3D apps serve different purposes.
The HD apps are more or less like the GUI apps we know, except that the graphics are very flexible and can be animated, etc. That can be used for “business apps” as well as for most other purposes a GUI is used.
The 3D apps show a 2D view of a 3D world. They deal with cubes, spheres, meshes, etc. and merely serve a 3D graphical purpose. You can make nice animations or interactive apps with it, but not necessarily “business apps” as we know them.
One can use 2D (HD) items in 3D, but it takes a little more work. I haven’t investigated much time into this, but they must be placed onto something flat in 3D space, AFAIK. The form is not considered as a flat space anymore, so you can’t just put a button on a form. You put shapes in space, you must light them, etc.
As Robert Love said in the SO answer you linked to, FireMonkey can do more than just nice HD traditional user interfaces. It leverages the posiblities of the GPU in more than one way.