add components_internal example

2 files changed, 72 insertions, 2 deletions

diff --git a/src/example/CMakeLists.txt b/src/example/CMakeLists.txt
index bcc9271..eef38fd 100644
--- a/src/example/CMakeLists.txt
+++ b/src/example/CMakeLists.txt
@@ -1,3 +1,17 @@
-add_executable(audio_internal EXCLUDE_FROM_ALL audio_internal.cpp)
-target_link_libraries(audio_internal PUBLIC crepe)
+# add_example(target_name [SOURCES...])
+function(add_example target_name)
+	# if SOURCES is not specified
+	if(NOT ARGV1)
+		# A .cpp file with target_name exists, and should be used
+		set(sources ${target_name}.cpp)
+	else()
+		set(sources ${ARGV})
+	endif()
+
+	add_executable(${target_name} EXCLUDE_FROM_ALL ${sources})
+	target_link_libraries(${target_name} PUBLIC crepe)
+endfunction()
+
+add_example(audio_internal)
+add_example(components_internal)
 
diff --git a/src/example/components_internal.cpp b/src/example/components_internal.cpp
new file mode 100644
index 0000000..821a7de
--- /dev/null
+++ b/src/example/components_internal.cpp
@@ -0,0 +1,56 @@
+/** \file
+ * 
+ * Standalone example for usage of the internal ECS
+ */
+
+#include <cassert>
+#include <chrono>
+
+#include <crepe/util/log.h>
+#include <crepe/ComponentManager.h>
+#include <crepe/GameObject.h>
+#include <crepe/Components.h>
+
+using namespace crepe;
+using namespace std;
+
+#define OBJ_COUNT 100000
+
+int main() {
+	dbg_trace();
+
+	auto & mgr = ComponentManager::get_instance();
+
+  auto start_adding = chrono::high_resolution_clock::now();
+
+  GameObject * game_object[OBJ_COUNT];
+
+  for (int i = 0; i < OBJ_COUNT; ++i) {
+    game_object[i] = new GameObject(i, "Name", "Tag", 0);
+
+    game_object[i]->add_component<Sprite>("test");
+    game_object[i]->add_component<Rigidbody>(0, 0, i);
+    game_object[i]->add_component<Collider>(i);
+  }
+
+  auto stop_adding = chrono::high_resolution_clock::now();
+
+  auto sprites = mgr.get_components_by_type<Sprite>();
+  for (auto sprite : sprites) {
+		assert(sprite.get().path == "test");
+  }
+
+  auto stop_looping = chrono::high_resolution_clock::now();
+
+  for (int i = 0; i < OBJ_COUNT; ++i) {
+    delete game_object[i];
+  }
+
+  auto add_time = chrono::duration_cast<chrono::microseconds>(stop_adding - start_adding);
+  auto loop_time = chrono::duration_cast<chrono::microseconds>(stop_looping - stop_adding);
+	printf("add time:  %ldus\n", add_time.count());
+	printf("loop time: %ldus\n", loop_time.count());
+
+	return 0;
+}
+