Basic movement example

src/dawn/scene/SceneComponent.cpp

@@ -39,6 +39,11 @@ void SceneComponent::dispose() {
     sceneComponentState,
     SCENE_COMPONENT_STATE_DISPOSED
   );
+
+  // Clear Listeners
+  for(auto &listener : this->listeners) listener();
+  this->listeners.clear();
+
   this->onDispose();
   this->item.reset();
 }

src/dawn/scene/SceneComponent.hpp

@@ -21,6 +21,8 @@ namespace Dawn {
       uint_fast8_t sceneComponentState = 0;
 
     protected:
+      std::vector<std::function<void()>> listeners;
+
       /**
        * Custom component listener that is invoked when the component is meant
        * to initialize.

src/dawnrpg/component/entity/Entity.cpp

@@ -4,15 +4,56 @@
 // https://opensource.org/licenses/MIT
 
 #include "Entity.hpp"
+#include "scene/Scene.hpp"
 #include "assert/assert.hpp"
 
 using namespace Dawn;
 
 void Entity::onInit() {
   auto world = this->world.lock();
-  assertNotNull(world, "World is no longer active?  ");
+  assertNotNull(world, "World is no longer active?");
+
+  listeners.push_back(getScene()->onUnpausedUpdate.listen([this](float delta) {
+    if(this->stepTime <= 0.0f) return;
+    this->stepTime = 0;
+    this->getItem()->setLocalPosition(glm::vec3(this->tileX, this->tileY, this->tileZ));
+  }));
 }
 
 void Entity::onDispose() {
   
 }
+
+void Entity::move(const enum EntityDirection direction) {
+  entitytileposition_t newTileX, newTileY, newTileZ;
+  newTileX = tileX;
+  newTileY = tileY;
+  newTileZ = tileZ;
+
+  switch(direction) {
+    case EntityDirection::Up:
+      newTileZ--;
+      break;
+    case EntityDirection::Down:
+      newTileZ++;
+      break;
+    case EntityDirection::Left:
+      newTileX--;
+      break;
+    case EntityDirection::Right:
+      newTileX++;
+      break;
+    default:
+      assertUnreachable("Invalid direction: %d", direction);
+  }
+
+  // Get the tile at the destination, check for height if we are on stairs, etc.
+  // If the tile is not walkable, return early.
+
+  // Move the entity to the new tile.
+  this->tileX = newTileX;
+  this->tileY = newTileY;
+  this->tileZ = newTileZ;
+  this->direction = direction;
+  this->stepTime = 1.0f;
+}

src/dawnrpg/component/entity/Entity.hpp

@@ -7,15 +7,31 @@
 #include "scene/SceneComponent.hpp"
 
 typedef uint32_t entityid_t;
+typedef int64_t entitytileposition_t;
 
 namespace Dawn {
   class World;
 
-  class Entity final : public SceneComponent {
+  enum class EntityDirection {
+    Up,
+    Down,
+    Left,
+    Right
+  };
+
+  class Entity : public SceneComponent {
+    private:
+      entitytileposition_t tileX = 0, tileY = 0, tileZ = 0;
+      enum EntityDirection direction = EntityDirection::Down;
+      float_t stepTime = 0.0f;
+
+    protected:
+
     public:
       std::weak_ptr<World> world;
       
       void onInit() override;
       void onDispose() override;
+      void move(const enum EntityDirection direction);
   };
 }

src/dawnrpg/component/entity/Player.cpp

@@ -10,14 +10,22 @@
 using namespace Dawn;
 
 void Player::onInit() {
-  listenerUpdate = getScene()->onUnpausedUpdate.listen([this](float delta) {
-    InputManager &im = getGame()->inputManager;
-    if(im.isDown(InputBind::Up)) {
+  Entity::onInit();
 
+  listeners.push_back(getScene()->onUnpausedUpdate.listen([this](float delta) {
+    InputManager &im = getGame()->inputManager;
+    if(im.isPressed(InputBind::Up)) {
+      this->move(EntityDirection::Up);
+    } else if(im.isPressed(InputBind::Down)) {
+      this->move(EntityDirection::Down);
+    } else if(im.isPressed(InputBind::Left)) {
+      this->move(EntityDirection::Left);
+    } else if(im.isPressed(InputBind::Right)) {
+      this->move(EntityDirection::Right);
     }
-  });
+  }));
 }
 
 void Player::onDispose() {
-  listenerUpdate();
+  Entity::onDispose();
 }

src/dawnrpg/component/entity/Player.hpp

@@ -4,12 +4,11 @@
 // https://opensource.org/licenses/MIT
 
 #pragma once
-#include "scene/SceneComponent.hpp"
+#include "component/entity/Entity.hpp"
 
 namespace Dawn {
-  class Player : public SceneComponent {
+  class Player : public Entity {
     protected:
-      std::function<void()> listenerUpdate;
 
     public:
       void onInit() override;

src/dawnrpg/input/InputBinds.hpp

@@ -8,6 +8,8 @@
 namespace Dawn {
   enum class InputBind : uint8_t {
     Up,
-    Down
+    Down,
+    Left,
+    Right
   };
 }

src/dawnrpg/prefab/PlayerPrefab.cpp

@@ -15,10 +15,8 @@ struct PlayerPrefab Dawn::createPlayerPrefab(
   player.item = world->getScene()->createSceneItem();
   player.item->setParent(world->getItem());
 
-  player.entity = player.item->addComponent<Entity>();
-  player.entity->world = world;
-
   player.player = player.item->addComponent<Player>();
+  player.player->world = world;
 
   player.mesh = std::make_shared<Mesh>();
   player.mesh->createBuffers(QUAD_VERTICE_COUNT, QUAD_INDICE_COUNT);

src/dawnrpg/prefab/PlayerPrefab.hpp

@@ -13,7 +13,6 @@
 namespace Dawn {
   struct PlayerPrefab : public Prefab {
     public:
-      std::shared_ptr<Entity> entity;
       std::shared_ptr<Player> player;
       std::shared_ptr<Mesh> mesh;
       std::shared_ptr<MeshRenderer> meshRenderer;