导入场景时，如果没有摄像机，创建一个缺省摄像机

source/utils/CMakeLists.txt

@@ -30,6 +30,19 @@ set(DV_UTILS_SCENE_SOURCE_FILES
 )
 source_group("source/scene" FILES ${DV_UTILS_SCENE_SOURCE_FILES})
 
+#################
+# camera
+#################
+set(DV_UTILS_CAMERA_INCLUDE_FILES
+	include/camera/dvu_default_camera.h
+)
+source_group("include/camera" FILES ${DV_UTILS_CAMERA_INCLUDE_FILES})
+
+set(DV_UTILS_CAMERA_SOURCE_FILES
+	source/camera/dvu_default_camera.cpp
+)
+source_group("source/camera" FILES ${DV_UTILS_CAMERA_SOURCE_FILES})
+
 include_directories(
 	${DV_AUTO_INCLUDE_PATH}
 	${DV_CORE_INCLUDE_PATH}
@@ -43,6 +56,8 @@ add_library(dv_utils SHARED
 	${DV_UTILS_SCENE_SOURCE_FILES}
 	${DV_UTILS_BUFFER_INCLUDE_FILES}
 	${DV_UTILS_BUFFER_SOURCE_FILES}
+	${DV_UTILS_CAMERA_INCLUDE_FILES}
+	${DV_UTILS_CAMERA_SOURCE_FILES}
 )
 
 target_link_libraries(dv_utils