From 4588f45271b4c24863ccfe2041bb9c122d1f37a3 Mon Sep 17 00:00:00 2001
From: Matteo De Carlo <matteo.dek@covolunablu.org>
Date: Tue, 23 May 2023 15:11:40 +0200
Subject: [PATCH] Improved linux/cmake template

---
 Template_Linux/CMakeLists.txt | 35 +++++++++++++++++++++++++++++++----
 Template_Linux/main.cpp       |  5 ++++-
 2 files changed, 35 insertions(+), 5 deletions(-)

diff --git a/Template_Linux/CMakeLists.txt b/Template_Linux/CMakeLists.txt
index 7708501e1..bf7d6d622 100644
--- a/Template_Linux/CMakeLists.txt
+++ b/Template_Linux/CMakeLists.txt
@@ -1,6 +1,16 @@
 cmake_minimum_required(VERSION 3.8)
 project(Template_Linux)
 
+# if the engine is installed system-wise,
+# you can set INSTALLED_ENGINE to ON
+# moving your project folder wherever you want
+set(INSTALLED_ENGINE OFF)
+# you may also want to remove the copy mechanism of the startup.lua file
+
+if (${INSTALLED_ENGINE})
+    find_package(WickedEngine REQUIRED)
+endif()
+
 set (SOURCE_FILES
     main.cpp
     stdafx.h    
@@ -11,11 +21,28 @@ set(LIB_DXCOMPILER "libdxcompiler.so")
 add_executable(Template_Linux ${SOURCE_FILES})
 
 target_link_libraries(Template_Linux PUBLIC
-    WickedEngine
+    # These are cmake generator expressions. They seem more dauting than they are
+    # Basically if the variable is ON it will give WickedEngine,
+    # if it's off, it will give WickedEngine::WickedEngine
+    $<$<NOT:$<BOOL:${INSTALLED_ENGINE}>>:WickedEngine>
+    $<$<BOOL:${INSTALLED_ENGINE}>:WickedEngine::WickedEngine>
 )
 
+if (${INSTALLED_ENGINE})
+    get_property(LIBDXCOMPILER_PATH
+        TARGET WickedEngine::dxcompiler
+        PROPERTY IMPORTED_LOCATION)
+    get_filename_component(WICKED_LIBFOLDER ${LIBDXCOMPILER_PATH} DIRECTORY)
+    set(STARTUP_LUA "${WICKED_LIBFOLDER}/Editor/startup.lua")
+else()
+    set(LIBDXCOMPILER_PATH "${CMAKE_SOURCE_DIR}/WickedEngine/${LIB_DXCOMPILER}")
+    set(STARTUP_LUA "${CMAKE_SOURCE_DIR}/Editor/startup.lua")
+endif()
+message("libdxcompiler found at ${LIBDXCOMPILER_PATH}")
+message("startup lua found at ${STARTUP_LUA}")
+
 add_custom_command(
     TARGET Template_Linux POST_BUILD
-    COMMAND ${CMAKE_COMMAND} -E copy_if_different ${CMAKE_SOURCE_DIR}/WickedEngine/${LIB_DXCOMPILER} ${CMAKE_CURRENT_BINARY_DIR}
-    COMMAND ${CMAKE_COMMAND} -E copy_if_different ${CMAKE_SOURCE_DIR}/Editor/startup.lua ${CMAKE_CURRENT_BINARY_DIR}/startup.lua
-)
\ No newline at end of file
+    COMMAND ${CMAKE_COMMAND} -E copy_if_different ${LIBDXCOMPILER_PATH} ${CMAKE_CURRENT_BINARY_DIR}
+    COMMAND ${CMAKE_COMMAND} -E copy_if_different ${STARTUP_LUA} ${CMAKE_CURRENT_BINARY_DIR}/startup.lua
+)
diff --git a/Template_Linux/main.cpp b/Template_Linux/main.cpp
index aea60ace2..fc2680592 100644
--- a/Template_Linux/main.cpp
+++ b/Template_Linux/main.cpp
@@ -43,6 +43,9 @@ int sdl_loop(wi::Application &application)
 int main(int argc, char *argv[])
 {
     wi::Application application;
+    #ifdef WickedEngine_SHADER_DIR
+    wi::renderer::SetShaderSourcePath(WickedEngine_SHADER_DIR);
+    #endif
 
     application.infoDisplay.active = true;
     application.infoDisplay.watermark = true;
@@ -65,4 +68,4 @@ int main(int argc, char *argv[])
     SDL_Quit();
 
     return ret;
-}
\ No newline at end of file
+}