merge 2 gameloop branches

14 files changed, 118 insertions, 92 deletions

diff --git a/src/crepe/api/LoopManager.cpp b/src/crepe/api/LoopManager.cpp
index df09f7e..14e68c2 100644
--- a/src/crepe/api/LoopManager.cpp
+++ b/src/crepe/api/LoopManager.cpp
@@ -6,20 +6,25 @@
 #include "../system/PhysicsSystem.h"
 #include "../system/RenderSystem.h"
 #include "../system/ScriptSystem.h"
-
+#include "../api/EventManager.h"
 #include "LoopManager.h"
 #include "LoopTimer.h"
-
+#include <iostream>
 using namespace crepe;
 using namespace std;
 
 LoopManager::LoopManager() {
+	this->loop_timer = make_unique<LoopTimer>();
 	this->load_system<AnimatorSystem>();
 	this->load_system<CollisionSystem>();
 	this->load_system<ParticleSystem>();
 	this->load_system<PhysicsSystem>();
 	this->load_system<RenderSystem>();
 	this->load_system<ScriptSystem>();
+	EventManager::get_instance().subscribe<ShutDownEvent>([this](const ShutDownEvent& event) {
+    	return this->on_shutdown(event);
+	});
+
 }
 
 void LoopManager::process_input() {
@@ -35,29 +40,32 @@ void LoopManager::set_running(bool running) { this->game_running = running; }
 void LoopManager::fixed_update() {}
 
 void LoopManager::loop() {
-	LoopTimer & timer = LoopTimer::get_instance();
-	timer.start();
+	this->loop_timer->start();
 
 	while (game_running) {
-		timer.update();
+		this->loop_timer->update();
 
-		while (timer.get_lag() >= timer.get_fixed_delta_time()) {
+		while (this->loop_timer->get_lag() >= this->loop_timer->get_fixed_delta_time()) {
 			this->process_input();
 			this->fixed_update();
-			timer.advance_fixed_update();
+			this->loop_timer->advance_fixed_update();
 		}
 
 		this->update();
 		this->render();
-
-		timer.enforce_frame_rate();
+		this->loop_timer->enforce_frame_rate();
 	}
 }
 
 void LoopManager::setup() {
 	this->game_running = true;
+<<<<<<< HEAD
 	LoopTimer::get_instance().start();
 	LoopTimer::get_instance().set_target_fps(200);
+=======
+	this->loop_timer->start();
+	this->loop_timer->set_fps(60);
+>>>>>>> wouter/gameloop-improvements
 }
 
 void LoopManager::render() {
@@ -65,5 +73,9 @@ void LoopManager::render() {
 		this->get_system<RenderSystem>().update();
 	}
 }
+bool LoopManager::on_shutdown(const ShutDownEvent & e){
+	this->game_running = false;
+	return false;
+}
 
-void LoopManager::update() { LoopTimer & timer = LoopTimer::get_instance(); }
+void LoopManager::update() {}
diff --git a/src/crepe/api/LoopManager.h b/src/crepe/api/LoopManager.h
index 13e6dac..ff1ff55 100644
--- a/src/crepe/api/LoopManager.h
+++ b/src/crepe/api/LoopManager.h
@@ -7,7 +7,7 @@
 #include "api/SceneManager.h"
 
 namespace crepe {
-
+class LoopTimer;
 /**
  * \brief Main game loop manager
  *
@@ -91,6 +91,8 @@ private:
 	SceneManager scene_manager{component_manager};
 
 private:
+	std::unique_ptr<LoopTimer> loop_timer;
+	bool on_shutdown(const ShutDownEvent & e);
 	/**
 	 * \brief Collection of System instances
 	 *
diff --git a/src/crepe/api/LoopTimer.cpp b/src/crepe/api/LoopTimer.cpp
index f94e24b..fe5544d 100644
--- a/src/crepe/api/LoopTimer.cpp
+++ b/src/crepe/api/LoopTimer.cpp
@@ -9,10 +9,6 @@ using namespace crepe;
 
 LoopTimer::LoopTimer() { dbg_trace(); }
 
-LoopTimer & LoopTimer::get_instance() {
-	static LoopTimer instance;
-	return instance;
-}
 
 void LoopTimer::start() {
 	this->last_frame_time = std::chrono::steady_clock::now();
@@ -57,11 +53,8 @@ void LoopTimer::set_game_scale(double value) { this->game_scale = value; }
 
 double LoopTimer::get_game_scale() const { return this->game_scale; }
 void LoopTimer::enforce_frame_rate() {
-	std::chrono::steady_clock::time_point current_frame_time
-		= std::chrono::steady_clock::now();
-	std::chrono::milliseconds frame_duration
-		= std::chrono::duration_cast<std::chrono::milliseconds>(current_frame_time
-																- this->last_frame_time);
+    auto current_frame_time = std::chrono::steady_clock::now();
+    auto frame_duration = current_frame_time - this->last_frame_time;
 
 	if (frame_duration < this->frame_target_time) {
 		std::chrono::milliseconds delay_time
diff --git a/src/crepe/api/LoopTimer.h b/src/crepe/api/LoopTimer.h
index 0a48e20..e348628 100644
--- a/src/crepe/api/LoopTimer.h
+++ b/src/crepe/api/LoopTimer.h
@@ -6,13 +6,7 @@ namespace crepe {
 
 class LoopTimer {
 public:
-	/**
-	 * \brief Get the singleton instance of LoopTimer.
-	 *
-	 * \return A reference to the LoopTimer instance.
-	 */
-	static LoopTimer & get_instance();
-
+	LoopTimer();
 	/**
 	 * \brief Get the current delta time for the current frame.
 	 *
@@ -96,12 +90,7 @@ private:
 	 */
 	double get_lag() const;
 
-	/**
-	 * \brief Construct a new LoopTimer object.
-	 *
-	 * Private constructor for singleton pattern to restrict instantiation outside the class.
-	 */
-	LoopTimer();
+	
 
 	/**
 	 * \brief Update the timer to the current frame.
diff --git a/src/crepe/api/Sprite.cpp b/src/crepe/api/Sprite.cpp
index 8647794..0a2ad4c 100644
--- a/src/crepe/api/Sprite.cpp
+++ b/src/crepe/api/Sprite.cpp
@@ -22,8 +22,8 @@ Sprite::Sprite(game_object_id_t id, Texture & image, const Color & color,
 
 	dbg_trace();
 
-	this->mask.w = sprite_image.get_width();
-	this->mask.h = sprite_image.get_height();
+	this->mask.w = sprite_image.get_size().x;
+	this->mask.h = sprite_image.get_size().y;
 	this->aspect_ratio = static_cast<double>(this->mask.w) / this->mask.h;
 }
 
diff --git a/src/crepe/api/Texture.cpp b/src/crepe/api/Texture.cpp
index e43bdaa..2b56271 100644
--- a/src/crepe/api/Texture.cpp
+++ b/src/crepe/api/Texture.cpp
@@ -3,6 +3,7 @@
 
 #include "Asset.h"
 #include "Texture.h"
+#include "types.h"
 
 using namespace crepe;
 using namespace std;
@@ -31,11 +32,7 @@ void Texture::load(const Asset & res) {
 	this->texture = ctx.texture_from_path(res.get_path());
 }
 
-int Texture::get_width() const {
-	if (this->texture == nullptr) return 0;
-	return SDLContext::get_instance().get_width(*this);
-}
-int Texture::get_height() const {
-	if (this->texture == nullptr) return 0;
-	return SDLContext::get_instance().get_height(*this);
+ivec2 Texture::get_size() const {
+	if (this->texture == nullptr) return {};
+	return SDLContext::get_instance().get_size(*this);
 }
diff --git a/src/crepe/api/Texture.h b/src/crepe/api/Texture.h
index 7206a66..1817910 100644
--- a/src/crepe/api/Texture.h
+++ b/src/crepe/api/Texture.h
@@ -8,6 +8,7 @@
 #include <memory>
 
 #include "Asset.h"
+#include "types.h"
 
 namespace crepe {
 
@@ -42,16 +43,10 @@ public:
 	Texture & operator=(const Texture &) = delete;
 
 	/**
-	 * \brief Gets the width of the texture.
-	 * \return Width of the texture in pixels.
+	 * \brief Gets the width and height of the texture.
+	 * \return Width and height of the texture in pixels.
 	 */
-	int get_width() const;
-
-	/**
-	 * \brief Gets the height of the texture.
-	 * \return Height of the texture in pixels.
-	 */
-	int get_height() const;
+	ivec2 get_size() const;
 
 private:
 	/**
diff --git a/src/crepe/facade/SDLContext.cpp b/src/crepe/facade/SDLContext.cpp
index 9f60285..e8be7ca 100644
--- a/src/crepe/facade/SDLContext.cpp
+++ b/src/crepe/facade/SDLContext.cpp
@@ -1,4 +1,5 @@
 #include <SDL2/SDL.h>
+#include <SDL2/SDL_blendmode.h>
 #include <SDL2/SDL_image.h>
 #include <SDL2/SDL_keycode.h>
 #include <SDL2/SDL_rect.h>
@@ -7,7 +8,9 @@
 #include <SDL2/SDL_video.h>
 #include <cmath>
 #include <cstddef>
+#include <cstdint>
 #include <functional>
+#include <iostream>
 #include <memory>
 #include <stdexcept>
 
@@ -18,6 +21,7 @@
 #include "../util/Log.h"
 
 #include "SDLContext.h"
+#include "api/Color.h"
 #include "types.h"
 
 using namespace crepe;
@@ -134,6 +138,7 @@ void SDLContext::draw(const RenderContext & ctx) {
 	SDL_Rect dstrect
 		= this->get_dst_rect(ctx.sprite, ctx.pos, ctx.cam, ctx.cam_pos, ctx.scale);
 
+	this->set_color_texture(ctx.sprite.sprite_image, ctx.sprite.color);
 	SDL_RenderCopyEx(this->game_renderer.get(), ctx.sprite.sprite_image.texture.get(),
 					 &srcrect, &dstrect, ctx.angle, NULL, render_flip);
 }
@@ -207,16 +212,19 @@ SDLContext::texture_from_path(const std::string & path) {
 	std::unique_ptr<SDL_Texture, std::function<void(SDL_Texture *)>> img_texture;
 	img_texture = {tmp_texture, [](SDL_Texture * texture) { SDL_DestroyTexture(texture); }};
 
+	SDL_SetTextureBlendMode(img_texture.get(), SDL_BLENDMODE_BLEND);
 	return img_texture;
 }
-int SDLContext::get_width(const Texture & ctx) const {
-	int w;
-	SDL_QueryTexture(ctx.texture.get(), NULL, NULL, &w, NULL);
-	return w;
-}
-int SDLContext::get_height(const Texture & ctx) const {
-	int h;
-	SDL_QueryTexture(ctx.texture.get(), NULL, NULL, NULL, &h);
-	return h;
+
+ivec2 SDLContext::get_size(const Texture & ctx) {
+	ivec2 size;
+	SDL_QueryTexture(ctx.texture.get(), NULL, NULL, &size.x, &size.y);
+	return size;
 }
+
 void SDLContext::delay(int ms) const { SDL_Delay(ms); }
+
+void SDLContext::set_color_texture(const Texture & texture, const Color & color) {
+	SDL_SetTextureColorMod(texture.texture.get(), color.r, color.g, color.b);
+	SDL_SetTextureAlphaMod(texture.texture.get(), color.a);
+}
diff --git a/src/crepe/facade/SDLContext.h b/src/crepe/facade/SDLContext.h
index 6030a6e..e49ca78 100644
--- a/src/crepe/facade/SDLContext.h
+++ b/src/crepe/facade/SDLContext.h
@@ -12,6 +12,8 @@
 #include "../api/Camera.h"
 #include "../api/Sprite.h"
 
+#include "api/Color.h"
+#include "api/Texture.h"
 #include "types.h"
 
 namespace crepe {
@@ -104,18 +106,11 @@ private:
 	std::unique_ptr<SDL_Texture, std::function<void(SDL_Texture *)>>
 	texture_from_path(const std::string & path);
 	/**
-	 * \brief Gets the width of a texture.
+	 * \brief Gets the size of a texture.
 	 * \param texture Reference to the Texture object.
-	 * \return Width of the texture as an integer.
+	 * \return Width and height of the texture as an integer.
 	 */
-	int get_width(const Texture & texture) const;
-
-	/**
-	 * \brief Gets the height of a texture.
-	 * \param texture Reference to the Texture object.
-	 * \return Height of the texture as an integer.
-	 */
-	int get_height(const Texture & texture) const;
+	ivec2 get_size(const Texture & ctx);
 
 private:
 	//! Will use draw,clear_screen, present_screen, camera.
@@ -160,6 +155,13 @@ private:
 	 */
 	SDL_Rect get_dst_rect(const Sprite & sprite, const vec2 & pos, const Camera & cam,
 						  const vec2 & cam_pos, const double & img_scale) const;
+	/**
+	 * \brief Set an additional color value multiplied into render copy operations.
+	 *
+	 * \param  texture the given texture to adjust 
+	 * \param  color the color data for the texture
+	 */
+	void set_color_texture(const Texture & texture, const Color & color);
 
 private:
 	//! sdl Window
diff --git a/src/crepe/system/RenderSystem.cpp b/src/crepe/system/RenderSystem.cpp
index c196bb1..11c9669 100644
--- a/src/crepe/system/RenderSystem.cpp
+++ b/src/crepe/system/RenderSystem.cpp
@@ -70,7 +70,7 @@ bool RenderSystem::render_particle(const Sprite & sprite, const Camera & cam,
 	bool rendering_particles = false;
 
 	for (const ParticleEmitter & em : emitters) {
-		if (!(&em.data.sprite == &sprite)) continue;
+		if (&em.data.sprite != &sprite) continue;
 		rendering_particles = true;
 		if (!em.active) continue;
 
diff --git a/src/crepe/system/RenderSystem.h b/src/crepe/system/RenderSystem.h
index e70831e..096d058 100644
--- a/src/crepe/system/RenderSystem.h
+++ b/src/crepe/system/RenderSystem.h
@@ -46,7 +46,10 @@ private:
 	 * \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
+	 * \param tm the Transform component for scale. This is not a const reference because each
+	 *  particle has a position and rotation that needs to overwrite the transform position and
+	 *  rotation without overwriting the current transform. and because the transform
+	 *  constructor is now protected i cannot make tmp inside
 	 * \return true if particles have been rendered
 	 */
 	bool render_particle(const Sprite & sprite, const Camera & cam, const double & scale);
@@ -68,13 +71,13 @@ private:
 	RefVector<Sprite> sort(RefVector<Sprite> & objs) const;
 
 	/**
-	 * \todo Include color handling for sprites.
 	 * \todo Add text rendering using SDL_ttf for text components.
 	 * \todo Implement a text component and a button component.
 	 * \todo Consider adding text input functionality.
 	 */
 
 private:
+	// FIXME: retrieve sdlcontext via mediator after #PR57
 	SDLContext & context = SDLContext::get_instance();
 
 	//! camera postion in the current scene
diff --git a/src/doc/feature/scene.dox b/src/doc/feature/scene.dox
index d81df4c..4124e37 100644
--- a/src/doc/feature/scene.dox
+++ b/src/doc/feature/scene.dox
@@ -6,10 +6,11 @@ namespace crepe {
 \ingroup feature
 \brief User-defined scenes
 
-Scenes can be used to implement game environments, and allow arbitrary game objects to be organized
-as part of the game structure. Scenes are implemented as derivative classes of Scene, which are
-added to the game using the SceneManager. Scenes describe the start of a Scene and cannot modify
-GameObjects during runtime of a Scene (use \ref feature_script "Scripting" for this purpose).
+Scenes can be used to implement game environments, and allow arbitrary game
+objects to be organized as part of the game structure. Scenes are implemented as
+derivative classes of Scene, which are added to the game using the SceneManager.
+Scenes describe the start of a Scene and cannot modify GameObjects during
+runtime of a Scene (use \ref feature_script for this purpose).
 
 \see SceneManager
 \see GameObject
@@ -18,19 +19,25 @@ GameObjects during runtime of a Scene (use \ref feature_script "Scripting" for t
 
 \par Example
 
-This example demonstrates how to define and add scenes to the loop/scene manager in the `crepe` framework.
-Each concrete scene should be derived from Scene. In the example below, the concrete scene is named MyScene.
-A concrete scene should, at least, implement (override) two methods, namely load_scene() and get_name(). The
-scene is build (using GameObjects) in the load_scene() method. GameObjects should be made using the
-component_manager::new_object(). In the example below, two GameObjects (named object1 and object2) are added
-to MyScene. object1 and object2 do not have any non-default Components attached to them, however, if needed,
-this should also be done in load_scene(). Each concrete scene must have a unique name. This unique name is
-used to load a new concrete scene (via a Script). The unique name is set using the get_name() method. In the
-example below, MyScene's unique name is my_scene.
-After setting up one or more concrete scene(s), the concrete scene(s) should be added to the loop/scene manager.
-This is done in your main(). Firstly, the LoopManager should be instantiated. Than, all the concrete scene(s)
-should be added to the loop/scene manger via loop_mgr::add_scene<>(). The templated argument should define the
-concrete scene to be added.
+This example demonstrates how to define and add scenes to the loop/scene manager
+in the `crepe` framework. Each concrete scene should be derived from Scene. In
+the example below, the concrete scene is named MyScene. A concrete scene should,
+at least, implement (override) two methods, namely load_scene() and get_name().
+The scene is build (using GameObjects) in the load_scene() method. GameObjects
+should be made using the component_manager::new_object().
+
+In the example below, two GameObjects (named object1 and object2) are added to
+MyScene. object1 and object2 do not have any non-default Components attached to
+them, however, if needed, this should also be done in load_scene(). Each
+concrete scene must have a unique name. This unique name is used to load a new
+concrete scene (via a Script). The unique name is set using the get_name()
+method. In the example below, MyScene's unique name is my_scene.
+
+After setting up one or more concrete scene(s), the concrete scene(s) should be
+added to the loop/scene manager. This is done in your main(). Firstly, the
+LoopManager should be instantiated. Than, all the concrete scene(s) should be
+added to the loop/scene manger via loop_mgr::add_scene<>(). The templated
+argument should define the concrete scene to be added.
 
 ```cpp
 #include <crepe/api/LoopManager.h>
diff --git a/src/doc/features.dox b/src/doc/features.dox
index 4786bed..96b7c6c 100644
--- a/src/doc/features.dox
+++ b/src/doc/features.dox
@@ -1,10 +1,28 @@
 // vim:ft=doxygen
 /**
 
+\htmlonly
+<style>
+table.memberdecls { display: none; }
+ul { margin: 1ex 0pt; }
+</style>
+\endhtmlonly
+
 \defgroup feature Features
 \brief Engine components
 
 This page lists engine features and contains usage instructions for each
 feature.
 
+\par Features
+
+- Scripting
+	- \ref feature_script <br>\copybrief feature_script
+
+- Game flow management
+	- \ref feature_scene <br>\copybrief feature_scene
+
+- Entity
+	- \ref feature_gameobject <br>\copybrief feature_gameobject
+
 */
diff --git a/src/example/rendering_particle.cpp b/src/example/rendering_particle.cpp
index 3a12144..349d11e 100644
--- a/src/example/rendering_particle.cpp
+++ b/src/example/rendering_particle.cpp
@@ -28,7 +28,7 @@ int main(int argc, char * argv[]) {
 	ParticleSystem psys{mgr};
 	AnimatorSystem asys{mgr};
 
-	Color color(255, 255, 255, 255);
+	Color color(255, 255, 255, 100);
 
 	auto img = Texture("asset/texture/test_ap43.png");
 	Sprite & test_sprite = game_object.add_component<Sprite>(
@@ -59,7 +59,7 @@ int main(int argc, char * argv[]) {
 	});
 	*/
 
-	auto & cam = game_object.add_component<Camera>(Color::WHITE, ivec2{1080, 720},
+	auto & cam = game_object.add_component<Camera>(Color::RED, ivec2{1080, 720},
 												   vec2{2000, 2000}, 1.0f);
 
 	/*