1 files changed, 132 insertions, 23 deletions

diff --git a/src/crepe/system/RenderSystem.cpp b/src/crepe/system/RenderSystem.cpp
index 0d37808..62d42ec 100644
--- a/src/crepe/system/RenderSystem.cpp
+++ b/src/crepe/system/RenderSystem.cpp
@@ -1,51 +1,160 @@
+#include <algorithm>
+#include <cassert>
+#include <cmath>
 #include <functional>
+#include <optional>
+#include <stdexcept>
 #include <vector>
 
-#include "../ComponentManager.h"
+#include "../api/Camera.h"
+#include "../api/ParticleEmitter.h"
 #include "../api/Sprite.h"
+#include "../api/Text.h"
 #include "../api/Transform.h"
+#include "../facade/Font.h"
 #include "../facade/SDLContext.h"
-#include "../util/Log.h"
+#include "../facade/Texture.h"
+#include "../manager/ComponentManager.h"
+#include "../manager/ResourceManager.h"
 
 #include "RenderSystem.h"
+#include "types.h"
 
 using namespace crepe;
+using namespace std;
 
-void RenderSystem::clear_screen() const {
-	SDLContext::get_instance().clear_screen();
+void RenderSystem::clear_screen() {
+	SDLContext & ctx = this->mediator.sdl_context;
+	ctx.clear_screen();
 }
 
-void RenderSystem::present_screen() const {
-	SDLContext::get_instance().present_screen();
+void RenderSystem::present_screen() {
+	SDLContext & ctx = this->mediator.sdl_context;
+	ctx.present_screen();
 }
+
 void RenderSystem::update_camera() {
-	ComponentManager & mgr = this->component_manager;
+	ComponentManager & mgr = this->mediator.component_manager;
+	SDLContext & ctx = this->mediator.sdl_context;
+	RefVector<Camera> cameras = mgr.get_components_by_type<Camera>();
 
-	std::vector<std::reference_wrapper<Camera>> cameras
-		= mgr.get_components_by_type<Camera>();
+	if (cameras.size() == 0) throw std::runtime_error("No cameras in current scene");
 
 	for (Camera & cam : cameras) {
-		SDLContext::get_instance().camera(cam);
-		this->curr_cam = &cam;
+		if (!cam.active) continue;
+		const Transform & transform
+			= mgr.get_components_by_id<Transform>(cam.game_object_id).front().get();
+		vec2 new_camera_pos = transform.position + cam.data.postion_offset;
+		ctx.update_camera_view(cam, new_camera_pos);
+		return;
 	}
+	throw std::runtime_error("No active cameras in current scene");
 }
-void RenderSystem::render_sprites() const {
-	ComponentManager & mgr = this->component_manager;
 
-	std::vector<std::reference_wrapper<Sprite>> sprites
-		= mgr.get_components_by_type<Sprite>();
+bool sorting_comparison(const Sprite & a, const Sprite & b) {
+	if (a.data.sorting_in_layer != b.data.sorting_in_layer)
+		return a.data.sorting_in_layer < b.data.sorting_in_layer;
+	if (a.data.order_in_layer != b.data.order_in_layer)
+		return a.data.order_in_layer < b.data.order_in_layer;
 
-	SDLContext & render = SDLContext::get_instance();
-	for (const Sprite & sprite : sprites) {
-		auto transforms
-			= mgr.get_components_by_id<Transform>(sprite.game_object_id);
-		render.draw(sprite, transforms[0], *curr_cam);
-	}
+	return false;
+}
+
+RefVector<Sprite> RenderSystem::sort(RefVector<Sprite> & objs) const {
+	RefVector<Sprite> sorted_objs(objs);
+	std::sort(sorted_objs.begin(), sorted_objs.end(), sorting_comparison);
+
+	return sorted_objs;
 }
 
 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) {
+
+	ComponentManager & mgr = this->mediator.component_manager;
+	SDLContext & ctx = this->mediator.sdl_context;
+	ResourceManager & resource_manager = this->mediator.resource_manager;
+	Texture & res = resource_manager.get<Texture>(sprite.source);
+
+	vector<reference_wrapper<ParticleEmitter>> emitters
+		= mgr.get_components_by_id<ParticleEmitter>(sprite.game_object_id);
+
+	bool rendering_particles = false;
+
+	for (const ParticleEmitter & em : emitters) {
+		if (&em.sprite != &sprite) continue;
+		rendering_particles = true;
+		if (!em.active) continue;
+
+		for (const Particle & p : em.particles) {
+			if (!p.active) continue;
+
+			ctx.draw(SDLContext::RenderContext{
+				.sprite = sprite,
+				.texture = res,
+				.pos = p.position,
+				.angle = p.angle,
+				.scale = scale,
+			});
+		}
+	}
+	return rendering_particles;
+}
+void RenderSystem::render_normal(const Sprite & sprite, const Transform & tm) {
+	SDLContext & ctx = this->mediator.sdl_context;
+	ResourceManager & resource_manager = this->mediator.resource_manager;
+	const Texture & res = resource_manager.get<Texture>(sprite.source);
+
+	ctx.draw(SDLContext::RenderContext{
+		.sprite = sprite,
+		.texture = res,
+		.pos = tm.position,
+		.angle = tm.rotation,
+		.scale = tm.scale,
+	});
+}
+
+void RenderSystem::render() {
+	ComponentManager & mgr = this->mediator.component_manager;
+	this->update_camera();
+
+	RefVector<Sprite> sprites = mgr.get_components_by_type<Sprite>();
+	ResourceManager & resource_manager = this->mediator.resource_manager;
+	RefVector<Sprite> sorted_sprites = this->sort(sprites);
+	RefVector<Text> text_components = mgr.get_components_by_type<Text>();
+	for (Text & text : text_components) {
+		const Transform & transform
+			= mgr.get_components_by_id<Transform>(text.game_object_id).front().get();
+		this->render_text(text, transform);
+	}
+	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);
+	}
+}
+void RenderSystem::render_text(Text & text, const Transform & tm) {
+	SDLContext & ctx = this->mediator.sdl_context;
+
+	if (!text.font.has_value()) {
+		text.font.emplace(ctx.get_font_from_name(text.font_family));
+	}
+
+	ResourceManager & resource_manager = this->mediator.resource_manager;
+
+	if (!text.font.has_value()) {
+		return;
+	}
+	const Asset & font_asset = text.font.value();
+	const Font & res = resource_manager.get<Font>(font_asset);
+}