merge `master` into `loek/util`

1 files changed, 52 insertions, 12 deletions

diff --git a/src/crepe/system/RenderSystem.cpp b/src/crepe/system/RenderSystem.cpp
index 7ee03e5..ad510f5 100644
--- a/src/crepe/system/RenderSystem.cpp
+++ b/src/crepe/system/RenderSystem.cpp
@@ -1,11 +1,16 @@
 #include <algorithm>
 #include <cassert>
+#include <cmath>
+#include <functional>
+#include <iostream>
 #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"
@@ -24,7 +29,8 @@ 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);
+		if (!cam.active) continue;
+		this->context.set_camera(cam);
 		this->curr_cam_ref = &cam;
 	}
 }
@@ -36,27 +42,61 @@ bool sorting_comparison(const Sprite & a, const Sprite & b) {
 	return false;
 }
 
-RefVector<Sprite> RenderSystem::sort(RefVector<Sprite> & objs) {
+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::render_sprites() {
+void RenderSystem::update() {
+	this->clear_screen();
+	this->update_camera();
+	this->render();
+	this->present_screen();
+}
+
+bool RenderSystem::render_particle(const Sprite & sprite, const double & scale) {
+
+	ComponentManager & mgr = this->component_manager;
+
+	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.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_ref);
+		}
+	}
+	return rendering_particles;
+}
+void RenderSystem::render_normal(const Sprite & sprite, const Transform & tm) {
+	this->context.draw(sprite, tm, *this->curr_cam_ref);
+}
+
+void RenderSystem::render() {
+
 	ComponentManager & mgr = this->component_manager;
 	RefVector<Sprite> sprites = mgr.get_components_by_type<Sprite>();
 	RefVector<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);
-	}
-}
+		if (!sprite.active) continue;
+		const Transform & transform
+			= mgr.get_components_by_id<Transform>(sprite.game_object_id).front().get();
 
-void RenderSystem::update() {
-	this->clear_screen();
-	this->update_camera();
-	this->render_sprites();
-	this->present_screen();
+		bool rendered_particles = this->render_particle(sprite, transform.scale);
+
+		if (rendered_particles) continue;
+
+		this->render_normal(sprite, transform);
+	}
 }