5 files changed, 159 insertions, 9 deletions

diff --git a/src/crepe/system/AnimatorSystem.cpp b/src/crepe/system/AnimatorSystem.cpp
new file mode 100644
index 0000000..bf45362
--- /dev/null
+++ b/src/crepe/system/AnimatorSystem.cpp
@@ -0,0 +1,37 @@
+
+#include <cstdint>
+#include <functional>
+#include <vector>
+
+#include "api/Animator.h"
+#include "facade/SDLContext.h"
+#include "util/log.h"
+
+#include "AnimatorSystem.h"
+#include "ComponentManager.h"
+
+using namespace crepe;
+
+AnimatorSystem::AnimatorSystem() { dbg_trace(); }
+AnimatorSystem::~AnimatorSystem() { dbg_trace(); }
+
+AnimatorSystem & AnimatorSystem::get_instance() {
+	static AnimatorSystem instance;
+	return instance;
+}
+
+void AnimatorSystem::update() {
+	ComponentManager & mgr = ComponentManager::get_instance();
+
+	std::vector<std::reference_wrapper<Animator>> animations
+		= mgr.get_components_by_type<Animator>();
+
+	uint64_t tick = SDLContext::get_instance().get_ticks();
+	for (Animator & a : animations) {
+		if (a.active) {
+			a.curr_row = (tick / 100) % a.row;
+			a.animator_rect.x = (a.curr_row * a.animator_rect.w) + a.curr_col;
+			a.spritesheet.sprite_rect = a.animator_rect;
+		}
+	}
+}
diff --git a/src/crepe/system/AnimatorSystem.h b/src/crepe/system/AnimatorSystem.h
new file mode 100644
index 0000000..969e9d1
--- /dev/null
+++ b/src/crepe/system/AnimatorSystem.h
@@ -0,0 +1,44 @@
+#pragma once
+
+#include "System.h"
+
+//TODO:
+// control if flip works with animation system
+
+namespace crepe {
+
+/**
+ * \brief The AnimatorSystem is responsible for managing and updating all Animator components.
+ *
+ * This system is responsible for controlling the behavior of the animations for all entities
+ * that have the Animator component attached. It updates the animations by controlling their
+ * frame changes, looping behavior, and overall animation state.
+ */
+class AnimatorSystem : public System {
+
+public:
+	/**
+	 * \brief Retrieves the singleton instance of the AnimatorSystem.
+	 *
+	 * \return A reference to the single instance of the AnimatorSystem.
+	 *
+	 * This method ensures that there is only one instance of the AnimatorSystem, following the
+	 * singleton design pattern. It can be used to access the system globally.
+	 */
+	static AnimatorSystem & get_instance();
+
+	/**
+	 * \brief Updates the Animator components.
+	 *
+	 * This method is called periodically (likely every frame) to update the state of all
+	 * Animator components, moving the animations forward and managing their behavior (e.g., looping).
+	 */
+	void update() override;
+
+private:
+	// private because singleton
+	AnimatorSystem(); // dbg_trace
+	~AnimatorSystem(); // dbg_trace
+};
+
+} // namespace crepe
diff --git a/src/crepe/system/CMakeLists.txt b/src/crepe/system/CMakeLists.txt
index ff6f66f..4c18b87 100644
--- a/src/crepe/system/CMakeLists.txt
+++ b/src/crepe/system/CMakeLists.txt
@@ -4,6 +4,7 @@ target_sources(crepe PUBLIC
 	PhysicsSystem.cpp
 	CollisionSystem.cpp
 	RenderSystem.cpp
+	AnimatorSystem.cpp
 )
 
 target_sources(crepe PUBLIC FILE_SET HEADERS FILES
@@ -12,4 +13,5 @@ target_sources(crepe PUBLIC FILE_SET HEADERS FILES
 	PhysicsSystem.h
 	CollisionSystem.h
 	RenderSystem.h
+	AnimatorSystem.h
 )
diff --git a/src/crepe/system/RenderSystem.cpp b/src/crepe/system/RenderSystem.cpp
index 5a07cc2..10211a3 100644
--- a/src/crepe/system/RenderSystem.cpp
+++ b/src/crepe/system/RenderSystem.cpp
@@ -20,7 +20,25 @@ RenderSystem & RenderSystem::get_instance() {
 	return instance;
 }
 
-void RenderSystem::update() {
+void RenderSystem::clear_screen() const {
+	SDLContext::get_instance().clear_screen();
+}
+
+void RenderSystem::present_screen() const {
+	SDLContext::get_instance().present_screen();
+}
+void RenderSystem::update_camera() {
+	ComponentManager & mgr = ComponentManager::get_instance();
+
+	std::vector<std::reference_wrapper<Camera>> cameras
+		= mgr.get_components_by_type<Camera>();
+
+	for (Camera & cam : cameras) {
+		SDLContext::get_instance().camera(cam);
+		this->curr_cam = &cam;
+	}
+}
+void RenderSystem::render_sprites() const {
 
 	ComponentManager & mgr = ComponentManager::get_instance();
 
@@ -28,14 +46,16 @@ void RenderSystem::update() {
 		= mgr.get_components_by_type<Sprite>();
 
 	SDLContext & render = SDLContext::get_instance();
-	render.clear_screen();
-
 	for (const Sprite & sprite : sprites) {
-		std::vector<std::reference_wrapper<Transform>> transforms
+		auto transforms
 			= mgr.get_components_by_id<Transform>(sprite.game_object_id);
-		for (const Transform & transform : transforms) {
-			render.draw(sprite, transform);
-		}
+		render.draw(sprite, transforms[0], *curr_cam);
 	}
-	render.present_screen();
+}
+
+void RenderSystem::update() {
+	this->clear_screen();
+	this->update_camera();
+	this->render_sprites();
+	this->present_screen();
 }
diff --git a/src/crepe/system/RenderSystem.h b/src/crepe/system/RenderSystem.h
index 4b910a4..70db21a 100644
--- a/src/crepe/system/RenderSystem.h
+++ b/src/crepe/system/RenderSystem.h
@@ -1,17 +1,64 @@
 #pragma once
 
+#include "api/Camera.h"
+
 #include "System.h"
 
 namespace crepe {
 
+/**
+ * \class RenderSystem
+ * \brief Manages rendering operations for all game objects.
+ *
+ * RenderSystem is responsible for rendering sprites, clearing and presenting the screen, 
+ * and managing the active camera. It functions as a singleton, providing centralized 
+ * rendering services for the application.
+ */
 class RenderSystem : public System {
 
 public:
+	/**
+	 * \brief Gets the singleton instance of RenderSystem.
+	 * \return Reference to the RenderSystem instance.
+	 */
 	static RenderSystem & get_instance();
-	void update();
+
+	/**
+	 * \brief Updates the RenderSystem for the current frame.
+	 * This method is called to perform all rendering operations for the current game frame.
+	 */
+	void update() override;
 
 private:
+	// Private constructor to enforce singleton pattern.
 	RenderSystem();
 	~RenderSystem();
+
+	//! Clears the screen in preparation for rendering.
+	void clear_screen() const;
+
+	//! Presents the rendered frame to the display.
+	void present_screen() const;
+
+	//! Updates the active camera used for rendering.
+	void update_camera();
+
+	//! Renders all active sprites to the screen.
+	void render_sprites() const;
+
+	/**
+	 * \todo Include color handling for sprites.
+	 * \todo Implement particle emitter rendering with sprites.
+	 * \todo Add text rendering using SDL_ttf for text components.
+	 * \todo Implement a text component and a button component.
+	 * \todo Ensure each sprite is checked for active status before rendering.
+	 * \todo Sort all layers by order before rendering.
+	 * \todo Consider adding text input functionality.
+	 */
+
+private:
+	//! Pointer to the current active camera for rendering
+	Camera * curr_cam = nullptr;
+	// TODO: needs a better solution
 };
 } // namespace crepe