episode 17 - enemies

maps/Map 2.tmx

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<map version="1.0" orientation="orthogonal" renderorder="right-down" width="20" height="16" tilewidth="16" tileheight="16" nextobjectid="44">
+<map version="1.0" orientation="orthogonal" renderorder="right-down" width="20" height="16" tilewidth="16" tileheight="16" nextobjectid="49">
  <tileset firstgid="1" name="PrtCave" tilewidth="16" tileheight="16">
   <image source="../content/tilesets/PrtCave.png" width="256" height="80"/>
  </tileset>
@@ -713,4 +713,21 @@
    <polyline points="0,0 -123.399,59.2051"/>
   </object>
  </objectgroup>
+ <objectgroup color="#4100ff" name="enemies">
+  <object id="44" name="bat" x="115.498" y="135.057" width="3.96448" height="3.96448">
+   <ellipse/>
+  </object>
+  <object id="45" name="bat" x="193.995" y="48.1023" width="3.17158" height="3.70018">
+   <ellipse/>
+  </object>
+  <object id="46" name="bat" x="291.521" y="32.2444" width="3.70018" height="3.43588">
+   <ellipse/>
+  </object>
+  <object id="47" name="bat" x="202.981" y="199.281" width="3.70018" height="3.96448">
+   <ellipse/>
+  </object>
+  <object id="48" name="bat" x="214.61" y="84.3112" width="3.43588" height="3.43588">
+   <ellipse/>
+  </object>
+ </objectgroup>
 </map>

notes/episode 17 - enemies.txt

@@ -0,0 +1,45 @@
+=====================================================
+Remaking Cavestory in C++
+Episode 17 - Enemies
+By: Limeoats
+Website: www.limeoats.com
+Twitter: @Limeoats
+Github: https://github.com/Limeoats/cavestory-development
+Reddit: http://www.reddit.com/r/Limeoats
+=====================================================
+
+
+=====================================================
+Problem
+=====================================================
+	-We don't have any monsters in our game yet :(
+
+
+
+=====================================================
+Details
+=====================================================
+-We'll be using the Bat in NpcCemet
+
+	3, 2, 32, "FlyLeft", 16, 16
+	3, 2, 48, "FlyRight", 16, 16
+
+
+=====================================================
+Solution
+=====================================================
+	-Get NpcCemet.pbm, make background transparent, make it a png and put it in sprites folder
+	-Create Enemy base class
+	-Create Bat class extending off of Enemy
+	-Add bat spawn points to Tiled
+	-Parse enemy info out of tmx file and into an Enemy vector
+	-Update and draw from the level class
+
+
+=====================================================
+Next time
+=====================================================
+	-Move the bat
+	-Collision with the bat (and damage to the player)
+	-Damage numbers? (maybe two episodes from now)
+

source/headers/enemy.h

@@ -0,0 +1,43 @@
+#ifndef ENEMY_H
+#define ENEMY_H
+
+#include "animatedsprite.h"
+#include "globals.h"
+#include "player.h"
+
+#include <string>
+
+class Graphics;
+
+class Enemy : public AnimatedSprite {
+public:
+	Enemy();
+	Enemy(Graphics &graphics, std::string filePath, int sourceX, int sourceY,
+			int width, int height, Vector2 spawnPoint, int timeToUpdate);
+	virtual void update(int elapsedTime, Player &player);
+	virtual void draw(Graphics &graphics);
+
+	const inline int getMaxHealth() const { return this->_maxHealth; }
+	const inline int getCurrentHealth() const { return this->_currentHealth; }
+protected:
+	Direction _direction;
+
+	int _maxHealth;
+	int _currentHealth;
+};
+
+
+class Bat : public Enemy {
+public:
+	Bat();
+	Bat(Graphics &graphics, Vector2 spawnPoint);
+	void update(int elapsedTime, Player &player);
+	void draw(Graphics &graphics);
+
+	void animationDone(std::string currentAnimation);
+	void setupAnimations();
+private:
+};
+
+
+#endif

source/headers/level.h

@@ -12,6 +12,8 @@
 #include "door.h"
 
 class Graphics;
+class Enemy;
+class Player;
 struct SDL_Texture;
 struct SDL_Rect;
 struct Tileset;
@@ -21,7 +23,7 @@ class Level {
 	Level();
 	Level(std::string mapName, Graphics &graphics);
 	~Level();
-	void update(int elapsedTime);
+	void update(int elapsedTime, Player &player);
 	void draw(Graphics &graphics);
 
 	std::vector<Rectangle> checkTileCollisions(const Rectangle &other);
@@ -49,6 +51,8 @@ class Level {
 
 	std::vector<Door> _doorList;
 
+	std::vector<Enemy*> _enemies;
+
 	/* void loadMap
 	 * Loads a map
 	 */

source/src/enemy.cpp

@@ -0,0 +1,51 @@
+#include "enemy.h"
+
+//Base enemy class
+Enemy::Enemy() {}
+
+Enemy::Enemy(Graphics &graphics, std::string filePath, int sourceX, int sourceY, int width, int height,
+		Vector2 spawnPoint, int timeToUpdate) :
+				AnimatedSprite(graphics, filePath, sourceX, sourceY, width, height,
+						spawnPoint.x, spawnPoint.y, timeToUpdate),
+				_direction(LEFT),
+				_maxHealth(0),
+				_currentHealth(0)
+{}
+
+void Enemy::update(int elapsedTime, Player &player) {
+	AnimatedSprite::update(elapsedTime);
+}
+
+void Enemy::draw(Graphics &graphics) {
+	AnimatedSprite::draw(graphics, this->_x, this->_y);
+}
+
+
+//Bat class
+Bat::Bat() {}
+
+Bat::Bat(Graphics &graphics, Vector2 spawnPoint) :
+		Enemy(graphics, "content/sprites/NpcCemet.png", 32, 32, 16, 16, spawnPoint, 140)
+{
+	this->setupAnimations();
+	this->playAnimation("FlyLeft");
+}
+
+void Bat::update(int elapsedTime, Player &player) {
+	this->_direction = player.getX() > this->_x ? RIGHT : LEFT;
+	this->playAnimation(this->_direction == RIGHT ? "FlyRight" : "FlyLeft");
+	Enemy::update(elapsedTime, player);
+}
+
+void Bat::draw(Graphics &graphics) {
+	Enemy::draw(graphics);
+}
+
+void Bat::animationDone(std::string currentAnimation) {
+
+}
+
+void Bat::setupAnimations() {
+	this->addAnimation(3, 2, 32, "FlyLeft", 16, 16, Vector2(0,0));
+	this->addAnimation(3, 2, 48, "FlyRight", 16, 16, Vector2(0,0));
+}

source/src/game.cpp

@@ -105,7 +105,7 @@ void Game::draw(Graphics &graphics) {
 
 void Game::update(float elapsedTime) {
 	this->_player.update(elapsedTime);
-	this->_level.update(elapsedTime);
+	this->_level.update(elapsedTime, this->_player);
 	this->_hud.update(elapsedTime);
 
 	//Check collisions

source/src/level.cpp

@@ -2,6 +2,8 @@
 #include "graphics.h"
 #include "globals.h"
 #include "utils.h"
+#include "player.h"
+#include "enemy.h"
 
 #include "tinyxml2.h"
 
@@ -311,15 +313,38 @@ void Level::loadMap(std::string mapName, Graphics &graphics) {
 				}
 			}
 
+			else if (ss.str() == "enemies") {
+				float x, y;
+				XMLElement* pObject = pObjectGroup->FirstChildElement("object");
+				if (pObject != NULL) {
+					while (pObject) {
+						x = pObject->FloatAttribute("x");
+						y = pObject->FloatAttribute("y");
+						const char* name = pObject->Attribute("name");
+						std::stringstream ss;
+						ss << name;
+						if (ss.str() == "bat") {
+							this->_enemies.push_back(new Bat(graphics, Vector2(std::floor(x) * globals::SPRITE_SCALE,
+									std::floor(y) * globals::SPRITE_SCALE)));
+						}
+
+						pObject = pObject->NextSiblingElement("object");
+					}
+				}
+			}
+
 			pObjectGroup = pObjectGroup->NextSiblingElement("objectgroup");
 		}
 	}
 }
 
-void Level::update(int elapsedTime) {
+void Level::update(int elapsedTime, Player &player) {
 	for (int i = 0; i < this->_animatedTileList.size(); i++) {
 		this->_animatedTileList.at(i).update(elapsedTime);
 	}
+	for (int i = 0; i < this->_enemies.size(); i++) {
+		this->_enemies.at(i)->update(elapsedTime, player);
+	}
 }
 
 void Level::draw(Graphics &graphics) {
@@ -329,6 +354,9 @@ void Level::draw(Graphics &graphics) {
 	for (int i = 0; i < this->_animatedTileList.size(); i++) {
 		this->_animatedTileList.at(i).draw(graphics);
 	}
+	for (int i = 0; i < this->_enemies.size(); i++) {
+		this->_enemies.at(i)->draw(graphics);
+	}
 }
 
 std::vector<Rectangle> Level::checkTileCollisions(const Rectangle &other) {