Add support for interactions with entities

src/control/MapContext.cpp

@@ -71,6 +71,15 @@ void MapContext::movePlayerContinue(uint64_t time) {
 		movePlayer(Model::Direction::WEST, time);
 }
 
+void MapContext::interact(uint64_t time) {
+	Model::Position<int> p = map.getEntityPosition(playerEntity) + playerEntity->getDirection();
+	Model::Entity *target = map.getEntityAt(p);
+
+	if (!target)
+		return;
+
+	target->interact(time);
+}
 
 void MapContext::keyPressed(uint16_t key, uint64_t time) {
 	switch (key) {
@@ -88,6 +97,10 @@ void MapContext::keyPressed(uint16_t key, uint64_t time) {
 
 	case SDL_SCANCODE_LEFT:
 		movePlayer(Model::Direction::WEST, time);
+		break;
+
+	case SDL_SCANCODE_SPACE:
+		interact(time);
 	}
 }
 

src/control/MapContext.hpp

@@ -52,6 +52,7 @@ private:
 	void movePlayer(Model::Direction dir, uint64_t time);
 	void movePlayerContinue(uint64_t time);
 	void keyPressed(uint16_t key, uint64_t time);
+	void interact(uint64_t time);
 
 	Model::Position<float> getViewPosition(uint64_t time) {
 		return map.getEntityPosition(playerEntity, time);

src/model/Entity.hpp

@@ -61,6 +61,10 @@ public:
 	void setDirection(Direction dir) {
 		direction = dir;
 	}
+
+	void interact(uint64_t time) {
+		std::fprintf(stderr, "Tried to interact with `%s' entity at %llu\n", name.c_str(), (unsigned long long)time);
+	}
 };
 
 }

src/model/Map.hpp

@@ -223,6 +223,18 @@ public:
 		return tiles[layer][p.y*width + p.x];
 	}
 
+	Entity * getEntityAt(const Position<int> &p) {
+		auto it = positions.find(p);
+		if (it == positions.end())
+			return nullptr;
+
+		return *it->second.begin();
+	}
+
+	Position<int> getEntityPosition(const Entity *entity) const {
+		return entityStates.at(entity).position;
+	}
+
 	Position<float> getEntityPosition(const Entity *entity, uint64_t time) const;
 	bool moveEntity(Entity *entity, Direction dir, uint64_t start, uint64_t end);
 	void moveEntityTo(Entity *entity, Position<int> pos);