HYDRA-307: Add the FootPrint node as an Hydra example

lib/mayaHydra/flowViewportAPIExamples/CMakeLists.txt

@@ -1 +1,2 @@
 add_subdirectory(flowViewportAPIMayaLocator)
+add_subdirectory(footPrintNode)

lib/mayaHydra/flowViewportAPIExamples/flowViewportAPIMayaLocator/flowViewportAPIMayaLocator.cpp

@@ -554,7 +554,7 @@ MStatus FlowViewportAPIMayaLocator::initialize()
     MAKE_INPUT(nAttr);
     CHECK_MSTATUS ( nAttr.setDefault(5.0, 5.0, 5.0) );
 
-    //Create dummy output attribute to trigger a call to the compute function on demand. as it's in the compute fonction that we add our scene indices
+    //Create dummy input attribute to trigger a call to the compute function on demand. as it's in the compute fonction that we add our scene indices
     mDummyInput = nAttr.create("dummyInput", "dI", MFnNumericData::kInt, 1.0, &status);
     MAKE_INPUT(nAttr);
     CHECK_MSTATUS ( nAttr.setDefault(1) );

lib/mayaHydra/flowViewportAPIExamples/footPrintNode/CMakeLists.txt

@@ -0,0 +1,102 @@
+set(TARGET_NAME mayaHydraFootPrintNode)
+
+add_library(${TARGET_NAME} SHARED)
+
+# -----------------------------------------------------------------------------
+# sources
+# -----------------------------------------------------------------------------
+target_sources(${TARGET_NAME} 
+    PRIVATE
+        mhFootPrintNode.cpp
+)
+
+set(HEADERS
+	PRIVATE
+)
+
+# -----------------------------------------------------------------------------
+# compiler configuration
+# -----------------------------------------------------------------------------
+target_compile_definitions(${TARGET_NAME}
+    PRIVATE 
+        # M3dView needs this (technically, MNativeWindowHdl.h)
+        # private atm because M3dView is only used in .cpp right now
+        # gcc will NOT set this automatically
+        $<$<BOOL:${IS_LINUX}>:LINUX>
+        # Not sure if msvcc sets this automatically, but won't hurt to redefine
+        $<$<BOOL:${IS_WINDOWS}>:_WIN32>
+		MFB_ALT_PACKAGE_NAME="${TARGET_NAME}" # This is used by Pixar HdSceneIndexPluginRegistry::Define to create a unique name
+)
+
+# -----------------------------------------------------------------------------
+# include directories
+# -----------------------------------------------------------------------------
+if(DEFINED MAYAUSD_VERSION)
+    target_compile_definitions(${TARGET_NAME}
+        PRIVATE
+            MAYAUSD_VERSION=${MAYAUSD_VERSION}
+    )
+endif()
+
+if(DEFINED MAYAHYDRA_VERSION)
+    target_compile_definitions(${TARGET_NAME}
+        PRIVATE
+            MAYAHYDRA_VERSION=${MAYAHYDRA_VERSION}
+    )
+endif()
+if(DEFINED MAYAHYDRA_CUT_ID)
+    target_compile_definitions(${TARGET_NAME}
+        PRIVATE
+            MAYAHYDRA_CUT_ID=${MAYAHYDRA_CUT_ID}
+    )
+endif()
+
+mayaHydra_compile_config(${TARGET_NAME})
+
+# -----------------------------------------------------------------------------
+# link libraries
+# -----------------------------------------------------------------------------
+target_link_libraries(${TARGET_NAME} 
+    PRIVATE 
+        mayaHydraLib
+)
+
+# -----------------------------------------------------------------------------
+# properties
+# -----------------------------------------------------------------------------
+maya_set_plugin_properties(${TARGET_NAME})
+
+# -----------------------------------------------------------------------------
+# run-time search paths
+# -----------------------------------------------------------------------------
+if(IS_MACOSX OR IS_LINUX) 
+    mayaUsd_init_rpath(rpath "lib/maya")
+    if(DEFINED MAYAUSD_TO_USD_RELATIVE_PATH)
+        mayaUsd_add_rpath(rpath "../../${MAYAUSD_TO_USD_RELATIVE_PATH}/lib")
+    elseif(DEFINED PXR_USD_LOCATION)
+        mayaUsd_add_rpath(rpath "${PXR_USD_LOCATION}/lib")
+    endif()
+    if (IS_LINUX AND DEFINED MAYAUSD_TO_USD_RELATIVE_PATH)
+        mayaUsd_add_rpath(rpath "../../${MAYAUSD_TO_USD_RELATIVE_PATH}/lib64")
+    endif()
+    if(IS_MACOSX AND DEFINED MAYAUSD_TO_USD_RELATIVE_PATH)
+        mayaUsd_add_rpath(rpath "../../../../Maya.app/Contents/MacOS")
+    endif()
+    mayaUsd_add_rpath(rpath "../")
+    mayaUsd_install_rpath(rpath ${TARGET_NAME})
+endif()
+
+# -----------------------------------------------------------------------------
+# install
+# -----------------------------------------------------------------------------
+install(TARGETS ${TARGET_NAME}
+        DESTINATION ${CMAKE_INSTALL_PREFIX}/lib/maya)
+
+if(IS_WINDOWS)
+    install(FILES $<TARGET_PDB_FILE:${TARGET_NAME}> 
+            DESTINATION ${CMAKE_INSTALL_PREFIX}/lib/maya OPTIONAL)
+endif()
+
+set(LIBFILENAME ${CMAKE_SHARED_LIBRARY_PREFIX}${TARGET_NAME}${CMAKE_SHARED_LIBRARY_SUFFIX})
+set(PLUG_INFO_LIBRARY_PATH "../../../${LIBFILENAME}")
+set(PLUG_INFO_RESOURCE_PATH "resources")