chore: add implot, add options for imnodes & implot

Author: rfletchr

.gitmodules

@@ -10,3 +10,6 @@
 [submodule "vendor/imgui/imnodes"]
 	path = vendor/imgui/imnodes
 	url = https://github.com/Nelarius/imnodes.git
+[submodule "vendor/imgui/implot"]
+	path = vendor/imgui/implot
+	url = https://github.com/epezent/implot.git

CMakeLists.txt

@@ -3,6 +3,8 @@ cmake_minimum_required(VERSION 3.28.3)
 
 set(SUPPRESS_VENDOR_WARNINGS ON CACHE BOOL "suppress vendor warnings?")
 
+option(ENABLE_IM_NODES "enable ImNodes" ON)
+option(ENABLE_IM_PLOT "enable ImPlot" ON)
 
 add_subdirectory(vendor/raylib)
 add_subdirectory(vendor/imgui)

vendor/imgui/CMakeLists.txt

@@ -1,12 +1,22 @@
 file(GLOB IMGUI_SRC imgui/*.cpp)
-file(GLOB IMNODES_SRC imnodes/*.cpp)
+set(IMGUI_INCLUDES imgui rlImGui)
+
+if(ENABLE_IM_NODES)
+	list(APPEND IMGUI_SRC imnodes/imnodes.cpp)
+	list(APPEND IMGUI_INCLUDES imnodes)
+endif()
+
+if(ENABLE_IM_PLOT)
+	list(APPEND IMGUI_SRC implot/implot.cpp  implot/implot_demo.cpp  implot/implot_items.cpp)
+	list(APPEND IMGUI_INCLUDES implot)
+endif()
+
 
 add_library(imgui STATIC
 	${IMGUI_SRC}
-	${IMNODES_SRC}
 	rlImGui/rlImGui.cpp
 )
-target_include_directories(imgui PUBLIC imgui imnodes rlImGui)
+target_include_directories(imgui PUBLIC ${IMGUI_INCLUDES})
 target_link_libraries(imgui PUBLIC raylib)