some more opengl boilerplate

vis/CMakeLists.txt

@@ -1,3 +1,12 @@
 add_executable(vis src/main.cpp)
 target_include_directories(vis PRIVATE include)
 target_link_libraries(vis PRIVATE tc glad glm glfw)
+
+add_custom_target(shaders ALL DEPENDS shader_output)
+add_custom_command(
+        OUTPUT shader_output
+        COMMAND ${CMAKE_COMMAND} -E copy_directory ${CMAKE_CURRENT_SOURCE_DIR}/shaders ${CMAKE_CURRENT_BINARY_DIR}/shaders
+        COMMENT "copied shaders"
+)
+
+add_dependencies(vis shaders)