2 files changed, 73 insertions, 16 deletions

diff --git a/src/crepe/system/RenderSystem.cpp b/src/crepe/system/RenderSystem.cpp
index 96c5f27..bc5422d 100644
--- a/src/crepe/system/RenderSystem.cpp
+++ b/src/crepe/system/RenderSystem.cpp
@@ -1,12 +1,14 @@
 #include <algorithm>
 #include <cassert>
-#include <functional>
+#include <cmath>
 #include <stdexcept>
 #include <vector>
 
 #include "../ComponentManager.h"
+#include "../api/ParticleEmitter.h"
 #include "../api/Sprite.h"
 #include "../api/Transform.h"
+#include "../api/Vector2.h"
 #include "../facade/SDLContext.h"
 
 #include "RenderSystem.h"
@@ -25,7 +27,7 @@ void RenderSystem::update_camera() {
 	if (cameras.size() == 0) throw std::runtime_error("No cameras in current scene");
 
 	for (Camera & cam : cameras) {
-		this->context.camera(cam);
+		this->context.set_camera(cam);
 		this->curr_cam_ref = &cam;
 	}
 }
@@ -46,20 +48,58 @@ RenderSystem::sort(std::vector<std::reference_wrapper<Sprite>> & objs) {
 	return sorted_objs;
 }
 
-void RenderSystem::render_sprites() {
-	ComponentManager & mgr = this->component_manager;
-	vector<reference_wrapper<Sprite>> sprites = mgr.get_components_by_type<Sprite>();
-	vector<reference_wrapper<Sprite>> sorted_sprites = this->sort(sprites);
 
-	for (const Sprite & sprite : sorted_sprites) {
-		auto transforms = mgr.get_components_by_id<Transform>(sprite.game_object_id);
-		this->context.draw(sprite, transforms[0], *this->curr_cam_ref);
-	}
-}
 
 void RenderSystem::update() {
 	this->clear_screen();
 	this->update_camera();
-	this->render_sprites();
+	this->render();
 	this->present_screen();
 }
+
+bool RenderSystem::render_particle(const Sprite & sprite, const double & scale) const {
+
+	ComponentManager & mgr = this->component_manager;
+
+	auto emitters = mgr.get_components_by_id<ParticleEmitter>(sprite.game_object_id);
+
+	bool rendering_particles = false;
+
+	for (const ParticleEmitter & em : emitters) {
+		if (!(&em.data.sprite == &sprite)) continue;
+		rendering_particles = true;
+		if (!em.active) continue;
+
+
+		for (const Particle & p : em.data.particles) {
+			if (!p.active) continue;
+			this->context.draw_particle(sprite, p.position, p.angle, scale, *this->curr_cam);
+		}
+	}
+	return rendering_particles;
+}
+void RenderSystem::render_normal(const Sprite & sprite, const Transform & tm) const {
+
+	ComponentManager & mgr = this->component_manager;
+
+	this->context.draw(sprite, tm, *this->curr_cam);
+}
+
+void RenderSystem::render() const {
+
+	ComponentManager & mgr = this->component_manager;
+	vector<reference_wrapper<Sprite>> sprites = mgr.get_components_by_type<Sprite>();
+	vector<reference_wrapper<Sprite>> sorted_sprites = this->sort(sprites);
+
+	for (const Sprite & sprite : sorted_sprites) {
+		if (!sprite.active) continue;
+		const Transform & transform
+			= mgr.get_components_by_id<Transform>(sprite.game_object_id).front().get();
+
+		bool rendered_particles = this->render_particle(sprite, transform.scale);
+
+		if (rendered_particles) continue;
+
+		this->render_normal(sprite, transform);
+	}
+}
diff --git a/src/crepe/system/RenderSystem.h b/src/crepe/system/RenderSystem.h
index 57b9c73..b9033fb 100644
--- a/src/crepe/system/RenderSystem.h
+++ b/src/crepe/system/RenderSystem.h
@@ -6,6 +6,7 @@
 #include "facade/SDLContext.h"
 
 #include "System.h"
+#include <cmath>
 
 namespace crepe {
 
@@ -27,7 +28,7 @@ public:
 	 * This method is called to perform all rendering operations for the current game frame.
 	 */
 	void update() override;
-
+	
 private:
 	//! Clears the screen in preparation for rendering.
 	void clear_screen();
@@ -38,8 +39,25 @@ private:
 	//! Updates the active camera used for rendering.
 	void update_camera();
 
-	//! Renders all active sprites to the screen.
-	void render_sprites();
+	//! Renders the whole screen
+	void render() const;
+
+	/**
+	 * \brief Renders all the particles on the screen from a given sprite.
+	 *
+	 * \param sprite renders the particles with given texture
+	 * \param tm the Transform component for scale
+	 * \return true if particles have been rendered
+	 */
+	bool render_particle(const Sprite & sprite, const double & scale) const;
+
+	/**
+	 * \brief renders a sprite with a Transform component on the screen 
+	 *
+	 * \param sprite  the sprite component that holds all the data
+	 * \param tm the Transform component that holds the position,rotation and scale 
+	 */
+	void render_normal(const Sprite & sprite, const Transform & tm);
 
 	/**
 	 * \brief sort a vector sprite objects with
@@ -52,7 +70,6 @@ private:
 
 	/**
 	 * \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.