7 files changed, 32 insertions, 9 deletions

@@ -5,5 +5,6 @@ const int GAME_WIDTH = 640;
 const int GAME_HEIGHT = 480;
 
 const int MOVEMENT_SPEED = 4;
+const int PARTY_FRAME_DELAY = 20;// / MOVEMENT_SPEED;
 
 #endif /* end of include guard: CONSTS_H_9561E49C */
@@ -5,12 +5,14 @@
 
 void loop(Renderer& renderer) {
   Game game;
-  int playerSpriteId = game.addSprite(Sprite("../res/lucas.png", renderer));
-
   Input keystate;
 
+  int kumaSprite = game.addSprite(Sprite("../res/kumatora.png", renderer, 17, 31));
+  int lucasSprite = game.addSprite(Sprite("../res/lucas.png", renderer, 17, 27));
+
   Party party;
-  party.addMember(playerSpriteId);
+  party.addMember(game, lucasSprite);
+  party.addMember(game, kumaSprite);
 
   renderer.render(game);
 
@@ -1,10 +1,20 @@
 #include "party.h"
 #include "consts.h"
 
-void Party::addMember(int spriteId) {
+void Party::addMember(Game& game, int spriteId) {
+  int index = members_.size();
+
   PartyMember newMember;
   newMember.spriteId = spriteId;
 
+  if (index > 0) {
+    Sprite& sprite = game.getSprite(spriteId);
+
+    for (int i = 0; i < PARTY_FRAME_DELAY * index; i++) {
+      newMember.nextPosition.push_back(sprite.loc());
+    }
+  }
+
   members_.push_back(std::move(newMember));
 }
 
@@ -36,7 +46,14 @@ void Party::move(Game& game, const Input& keystate) {
     pLoc.x() += MOVEMENT_SPEED;
   }
 
-  if (pLoc != p1.loc()) {
+  if (keystate.up || keystate.down || keystate.left || keystate.right) {
     p1.loc() = pLoc;
+
+    for (int i = 1; i < members_.size(); i++) {
+      Sprite& pNext = game.getSprite(members_[i].spriteId);
+      members_[i].nextPosition.push_back(pLoc);
+      pNext.loc() = members_[i].nextPosition.front();
+      members_[i].nextPosition.pop_front();
+    }
   }
 }
\ No newline at end of file
@@ -1,13 +1,14 @@
 #ifndef PARTY_H_826F91BA
 #define PARTY_H_826F91BA
 
+#include <deque>
 #include <vector>
 #include "game.h"
 
 class Party {
 public:
 
-  void addMember(int spriteId);
+  void addMember(Game& game, int spriteId);
 
   void move(Game& game, const Input& keystate);
 
@@ -15,6 +16,7 @@ private:
 
   struct PartyMember {
     int spriteId;
+    std::deque<vec2i> nextPosition;
   };
 
   std::vector<PartyMember> members_;
@@ -1,6 +1,7 @@
 #include "sprite.h"
 #include <SDL_image.h>
 
-Sprite::Sprite(std::string_view filename, Renderer& renderer) {
+Sprite::Sprite(std::string_view filename, Renderer& renderer, int width, int height) {
   textureId_ = renderer.loadImageFromFile(filename);
+  size_ = { width*4, height*4 };
 }
\ No newline at end of file
@@ -8,7 +8,7 @@
 class Sprite {
 public:
 
-  Sprite(std::string_view filename, Renderer& renderer);
+  Sprite(std::string_view filename, Renderer& renderer, int width, int height);
 
   int getTextureId() const {
     return textureId_;
@@ -26,7 +26,7 @@ private:
 
   int textureId_;
   vec2i loc_ { 0, 0 };
-  vec2i size_ { 17*4, 27 * 4 };
+  vec2i size_;
 };
 
 #endif /* end of include guard: SPRITE_H_70503825 */