Create AnimationComponent, and an example to show it

examples/CMakeLists.txt

@@ -1,2 +1,3 @@
 # Add examples as a subdirectory
-add_subdirectory(snake)
+add_subdirectory(snake)
+add_subdirectory(animation)

examples/animation/CMakeLists.txt

@@ -0,0 +1,15 @@
+cmake_minimum_required (VERSION 3.6)
+project(AnimationExample)
+
+add_executable(animation_example src/main.cpp)
+
+# Link headers and source files.
+file(GLOB_RECURSE source_list src/*.cpp)
+target_sources(animation_example PRIVATE ${source_list})
+target_include_directories(animation_example PUBLIC include)
+
+# Link simpleengine
+target_link_libraries(animation_example PUBLIC simpleengine)
+
+# Set standard to C++17
+set_target_properties(animation_example PROPERTIES CXX_STANDARD 17 CXX_EXTENSIONS OFF)

examples/animation/src/main.cpp

@@ -0,0 +1,73 @@
+//
+// Created by SeanOMik on 7/2/2020.
+// Github: https://github.com/SeanOMik
+// Email: seanomik@gmail.com
+//
+
+#include <simpleengine/game.h>
+#include <simpleengine/event.h>
+#include <simpleengine/entity.h>
+#include <simpleengine/components/movement/movement_component.h>
+#include <simpleengine/components/animation_component.h>
+#include <simpleengine/events/entity_event.h>
+#include <simpleengine/animation.h>
+
+#include <chrono>
+#include <iostream>
+
+class PlayerEntity : public simpleengine::Entity {
+private:
+    sf::Sprite sprite;
+    sf::Texture texture;
+    float movement_speed = 95;
+    sf::Vector2u window_size;
+
+    std::unique_ptr<simpleengine::AnimationComponent> anim_component;
+public:
+    explicit PlayerEntity(sf::Vector2u window_size) : window_size(window_size) {
+        AddComponent(std::make_unique<simpleengine::MovementComponent>(*this, movement_speed));
+
+        texture.loadFromFile("player_sheet.png");
+        sprite.setTexture(texture);
+
+        anim_component = std::make_unique<simpleengine::AnimationComponent>(*this, sprite, texture);
+        anim_component->AddAnimation("IDLE_LEFT", 20, 0, 0, 6, 0, 128, 128);
+        anim_component->AddAnimation("WALK_LEFT_NO_SWORD", 9, 0, 8, 9, 8, 128, 128);
+    }
+
+    ~PlayerEntity() override {
+        std::cout << "Destroying" << std::endl;
+
+        simpleengine::Entity::~Entity();
+    }
+
+    void Move(const float& delta_time, const float& x, const float& y) override {
+        sprite.move(x, y);
+    }
+
+    void Move(const float& delta_time, const sf::Vector2f& offset) override {
+        sprite.move(offset * delta_time);
+    }
+
+    void Move(const sf::Vector2f& offset) override {
+        sprite.move(offset);
+    }
+
+    void Update(const float& delta_time) override {
+        Entity::Update(delta_time);
+
+        //anim_component->PlayAnimation("IDLE_LEFT", delta_time);
+        anim_component->PlayAnimation("WALK_LEFT_NO_SWORD", delta_time);
+    }
+
+    void Render(sf::RenderTarget* target) override {
+        target->draw(sprite);
+    }
+};
+
+int main(int argc, char *argv[]) {
+    simpleengine::Game game(500, 500, "SimpleEngine - Animation Example");
+    game.AddEvent(new simpleengine::EntityEvent(game.GetWindow(), std::make_unique<PlayerEntity>(game.GetWindow()->getSize())));
+
+    return game.Run();
+}

include/simpleengine/animation.h

@@ -0,0 +1,38 @@
+//
+// Created by SeanOMik on 7/5/2020.
+// Github: https://github.com/SeanOMik
+// Email: seanomik@gmail.com
+//
+
+#ifndef SIMPLEENGINE_ANIMATION_H
+#define SIMPLEENGINE_ANIMATION_H
+
+#include <SFML/Graphics.hpp>
+
+namespace simpleengine {
+    class Animation {
+    public:
+        Animation(sf::Sprite &sprite, sf::Texture &texture_sheet, float speed, int start_frame_x,
+                int start_frame_y, int frame_ct_x, int frame_ct_y, int width, int height);
+
+        void Update(const float &delta_time);
+        void Reset();
+
+        /*void Play();
+        void Pause();*/
+
+    private:
+        sf::Sprite &sprite;
+        sf::Texture &texture_sheet;
+        float speed; // Speed is how long it takes until it swaps to next texture.
+        float timer;
+        int width;
+        int height;
+        sf::IntRect start_rect;
+        sf::IntRect current_rect;
+        sf::IntRect end_rect;
+
+    };
+}
+
+#endif //SIMPLEENGINE_ANIMATION_H

include/simpleengine/components/animation_component.h

@@ -0,0 +1,41 @@
+//
+// Created by SeanOMik on 7/4/2020.
+// Github: https://github.com/SeanOMik
+// Email: seanomik@gmail.com
+//
+
+#ifndef SIMPLEENGINE_ANIMATION_COMPONENT_H
+#define SIMPLEENGINE_ANIMATION_COMPONENT_H
+
+#include "../component.h"
+#include "../animation.h"
+
+#include <SFML/Graphics.hpp>
+
+namespace simpleengine {
+    class Entity;
+
+    class AnimationComponent : public Component {
+    private:
+
+        sf::Sprite& sprite;
+        sf::Texture& texture_sheet;
+        std::map<std::string, Animation> animations;
+
+    public:
+        explicit AnimationComponent(Entity& owning_entity, sf::Sprite& sprite, sf::Texture& texture_sheet);
+
+        void Update(const float &delta_time) override;
+
+        void AddAnimation(const std::string& animation_name, float speed, int start_frame_x, int start_frame_y, int frame_ct_x,
+            int frame_ct_y, int width, int height);
+        void AddAnimation(const std::string& animation_name, simpleengine::Animation animation);
+        void UpdateAnimation(const std::string& animation_name, const float& delta_time);
+
+        sf::Sprite &GetSprite() const;
+        sf::Texture &GetTextureSheet() const;
+        const std::map<std::string, Animation> &GetAnimations() const;
+    };
+}
+
+#endif //SIMPLEENGINE_ANIMATION_COMPONENT_H

include/simpleengine/entity.h

@@ -43,10 +43,6 @@ namespace simpleengine {
 
         void UpdateComponents(const float& delta_time);
         void AddComponent(std::unique_ptr<Component> component);
-
-        std::shared_ptr<Entity> GetShared() {
-            return shared_from_this();
-        }
     protected:
         std::vector<std::unique_ptr<Component>> components;
         bool destroying = false;

src/animation.cpp

@@ -0,0 +1,43 @@
+//
+// Created by SeanOMik on 7/5/2020.
+// Github: https://github.com/SeanOMik
+// Email: seanomik@gmail.com
+//
+
+#include "animation.h"
+
+simpleengine::Animation::Animation(sf::Sprite &sprite, sf::Texture &texture_sheet, float speed, int start_frame_x,
+    int start_frame_y, int frame_ct_x, int frame_ct_y, int width, int height) : sprite(sprite), texture_sheet(texture_sheet),
+        speed(speed), start_rect(sf::IntRect(start_frame_x * width, start_frame_y * height, width, height)),
+        end_rect(sf::IntRect(frame_ct_x * width, frame_ct_y * height, width, height)), width(width), height(height) {
+
+    timer = 0;
+
+    // Set start of sprite.
+    this->sprite.setTexture(texture_sheet, true);
+    this->sprite.setTextureRect(start_rect);
+    this->current_rect = start_rect;
+}
+
+void simpleengine::Animation::Update(const float &delta_time) {
+    // Update timer
+    timer += 100 * delta_time;
+    if (timer >= speed) {
+        // Reset animation
+        timer = 0;
+
+        // We have not reached the end, so change the texture.
+        if (current_rect != end_rect) {
+            current_rect.left += width;
+        } else {
+            current_rect.left = start_rect.left;
+        }
+
+        sprite.setTextureRect(current_rect);
+    }
+}
+
+void simpleengine::Animation::Reset() {
+    timer = 0;
+    current_rect = start_rect;
+}

src/components/animation_component.cpp

@@ -0,0 +1,48 @@
+//
+// Created by SeanOMik on 7/4/2020.
+// Github: https://github.com/SeanOMik
+// Email: seanomik@gmail.com
+//
+
+#include "components/animation_component.h"
+#include "animation.h"
+
+simpleengine::AnimationComponent::AnimationComponent(Entity& owning_entity, sf::Sprite& sprite, sf::Texture& texture_sheet)
+    : Component(owning_entity), sprite(sprite), texture_sheet(texture_sheet) {
+
+}
+
+void simpleengine::AnimationComponent::Update(const float &delta_time) {
+
+}
+
+void simpleengine::AnimationComponent::AddAnimation(const std::string& animation_name, float speed, int start_frame_x, int start_frame_y, int frame_ct_x,
+    int frame_ct_y, int width, int height) {
+
+    animations.emplace(animation_name, Animation(sprite, texture_sheet, speed, start_frame_x, start_frame_y, frame_ct_x, frame_ct_y, width, height));
+}
+
+void simpleengine::AnimationComponent::AddAnimation(const std::string& animation_name, simpleengine::Animation animation) {
+    animations.emplace(animation_name, animation);
+}
+
+void simpleengine::AnimationComponent::UpdateAnimation(const std::string &animation_name, const float &delta_time) {
+    auto anim = animations.find(animation_name);
+    if (anim != animations.end()) {
+        anim->second.Update(delta_time);
+    } else {
+        throw std::runtime_error("Animation, \"" + animation_name + "\", was not found!");
+    }
+}
+
+sf::Sprite &simpleengine::AnimationComponent::GetSprite() const {
+    return sprite;
+}
+
+sf::Texture &simpleengine::AnimationComponent::GetTextureSheet() const {
+    return texture_sheet;
+}
+
+const std::map<std::string, simpleengine::Animation> &simpleengine::AnimationComponent::GetAnimations() const {
+    return animations;
+}