Add Bullet Physics Support

Author: Polytonic

.gitmodules

@@ -18,3 +18,7 @@
     path = Glitter/Vendor/stb
     url = https://github.com/nothings/stb.git
     branch = master
+[submodule "Glitter/Vendor/bullet"]
+    path = Glitter/Vendor/bullet
+    url = https://github.com/bulletphysics/bullet3.git
+    branch = master

CMakeLists.txt

@@ -11,6 +11,13 @@ option(ASSIMP_BUILD_SAMPLES OFF)
 option(ASSIMP_BUILD_TESTS OFF)
 add_subdirectory(Glitter/Vendor/assimp)
 
+option(BUILD_BULLET2_DEMOS OFF)
+option(BUILD_CPU_DEMOS OFF)
+option(BUILD_EXTRAS OFF)
+option(BUILD_OPENGL3_DEMOS OFF)
+option(BUILD_UNIT_TESTS OFF)
+add_subdirectory(Glitter/Vendor/bullet)
+
 if(MSVC)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
 else()
@@ -22,6 +29,7 @@ endif()
 
 include_directories(Glitter/Headers/
                     Glitter/Vendor/assimp/include/
+                    Glitter/Vendor/bullet/src/
                     Glitter/Vendor/glad/include/
                     Glitter/Vendor/glfw/include/
                     Glitter/Vendor/glm/
@@ -50,6 +58,8 @@ add_definitions(-DGLFW_INCLUDE_NONE
 add_executable(${PROJECT_NAME} ${PROJECT_SOURCES} ${PROJECT_HEADERS}
                                ${PROJECT_SHADERS} ${PROJECT_CONFIGS}
                                ${VENDORS_SOURCES})
-target_link_libraries(${PROJECT_NAME} assimp glfw ${GLFW_LIBRARIES} ${GLAD_LIBRARIES})
+target_link_libraries(${PROJECT_NAME} assimp glfw
+                      ${GLFW_LIBRARIES} ${GLAD_LIBRARIES}
+                      BulletDynamics BulletCollision LinearMath)
 set_target_properties(${PROJECT_NAME} PROPERTIES
     RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/${PROJECT_NAME})

Glitter/Headers/glitter.hpp

@@ -7,6 +7,7 @@
 #include <assimp/Importer.hpp>
 #include <assimp/postprocess.h>
 #include <assimp/scene.h>
+#include <btBulletDynamicsCommon.h>
 #include <glad/glad.h>
 #include <glm/glm.hpp>
 #include <glm/gtc/type_ptr.hpp>