XR Controller Support Step 4: Controller Drawing

Addresses T77127 (Controller Drawing).

Adds VR controller visualization and custom drawing via draw
handlers. Add-ons can draw to the XR surface (headset display) and
mirror window by adding a View3D draw handler of region type 'XR' and
draw type 'POST_VIEW'.  Controller drawing and custom overlays can be
toggled individually as XR session options, which will be added in a
future update to the VR Scene Inspection add-on.

For the actual drawing, the OpenXR XR_MSFT_controller_model extension
is used to load a glTF model provided by the XR runtime. The model's
vertex data is then used to create a GPUBatch in the XR session
state. Finally, this batch is drawn via the XR surface draw handler
mentioned above.

For runtimes that do not support the controller model extension, a
a simple fallback shape (sphere) is drawn instead.

Reviewed By: Severin, fclem

Differential Revision: https://developer.blender.org/D10948

1 files changed, 7 insertions, 0 deletions

diff --git a/intern/ghost/CMakeLists.txt b/intern/ghost/CMakeLists.txt
index 76cac1049fb..05423209c71 100644
--- a/intern/ghost/CMakeLists.txt
+++ b/intern/ghost/CMakeLists.txt
@@ -473,6 +473,7 @@ if(WITH_XR_OPENXR)
     intern/GHOST_Xr.cpp
     intern/GHOST_XrAction.cpp
     intern/GHOST_XrContext.cpp
+    intern/GHOST_XrControllerModel.cpp
     intern/GHOST_XrEvent.cpp
     intern/GHOST_XrGraphicsBinding.cpp
     intern/GHOST_XrSession.cpp
@@ -482,13 +483,19 @@ if(WITH_XR_OPENXR)
     intern/GHOST_IXrGraphicsBinding.h
     intern/GHOST_XrAction.h
     intern/GHOST_XrContext.h
+    intern/GHOST_XrControllerModel.h
     intern/GHOST_XrException.h
     intern/GHOST_XrSession.h
     intern/GHOST_XrSwapchain.h
     intern/GHOST_Xr_intern.h
     intern/GHOST_Xr_openxr_includes.h
   )
+  list(APPEND INC
+    ../../extern/json/include
+    ../../extern/tinygltf
+  )
   list(APPEND INC_SYS
+    ${EIGEN3_INCLUDE_DIRS}
     ${XR_OPENXR_SDK_INCLUDE_DIR}
   )
   list(APPEND LIB