Added sprite bobbing (for Lucas underwater)

9 files changed, 52 insertions, 2 deletions

@@ -329,3 +329,18 @@ function AllowCrouching()
   local playerSprite = getSprite(playerId)
   playerSprite.cantCrouch = false
 end
+
+--- Makes a sprite start bobbing up and down (for underwater).
+-- This only applies when the sprite is on a normal medium (so, not on ladders).
+function StartBobbing(spriteName)
+  local spriteId = getSpriteByAlias(spriteName)
+  local sprite = getSprite(spriteId)
+  sprite.bobsWhenNormal = true
+end
+
+--- Makes a sprite stop bobbing up and down.
+function StopBobbing(spriteName)
+  local spriteId = getSpriteByAlias(spriteName)
+  local sprite = getSprite(spriteId)
+  sprite.bobsWhenNormal = false
+end
@@ -2,6 +2,7 @@ underwater = {}
 
 function underwater.leave()
   AllowCrouching()
+  StopBobbing("lucas")
 end
 
 function underwater.fish2()
@@ -2,6 +2,7 @@ underwater_start = {}
 
 function underwater_start.init()
   PreventCrouching()
+  StartBobbing("lucas")
 end
 
 function underwater_start.talk_to_fish1()
@@ -134,6 +134,25 @@ void AnimationSystem::tick(double dt) {
       }
     }
   }
+
+  bobbingTimer_.accumulate(dt);
+  while (bobbingTimer_.step()) {
+    for (Sprite& sprite : game_.getSprites() | game_.spriteView()) {
+      if (sprite.isAnimated && sprite.bobbing) {
+        if (sprite.bobbingDown) {
+          sprite.bobAmount--;
+          if (sprite.bobAmount == 0) {
+            sprite.bobbingDown = false;
+          }
+        } else {
+          sprite.bobAmount++;
+          if (sprite.bobAmount == 4) {
+            sprite.bobbingDown = true;
+          }
+        }
+      }
+    }
+  }
 }
 
 void AnimationSystem::setSpriteDirection(int spriteId, Direction dir) {
@@ -30,6 +30,7 @@ private:
 
   Game& game_;
   std::vector<Timer> animTimers_ = {{1000/5}, {1000/60}};//30fps * 1000 t/s;;
+  Timer bobbingTimer_ {1000/7};
 };
 
 #endif /* end of include guard: ANIMATION_SYSTEM_H_CCCC7CB8 */
@@ -332,12 +332,14 @@ void CharacterSystem::setAnimationFor(int spriteId, CharacterState state) {
 
       game_.getSystem<AnimationSystem>().setSpriteAnimation(spriteId, animName);
       sprite.hasShadow = sprite.normallyHasShadow;
+      sprite.bobbing = sprite.bobsWhenNormal;
 
       break;
     }
     case CharacterMedium::Ladder: {
       game_.getSystem<AnimationSystem>().setSpriteAnimation(spriteId, "climb");
       sprite.hasShadow = false;
+      sprite.bobbing = false;
 
       if (state == CharacterState::Still || state == CharacterState::Crouching) {
         sprite.animPaused = true;
@@ -355,6 +357,7 @@ void CharacterSystem::setAnimationFor(int spriteId, CharacterState state) {
 
       game_.getSystem<AnimationSystem>().setSpriteAnimation(spriteId, animName);
       sprite.hasShadow = false;
+      sprite.bobbing = false;
 
       break;
     }
@@ -115,6 +115,9 @@ void Renderer::renderSprite(const Sprite& sprite) {
     const SpriteFrame& frame = sprite.frames.at(sprite.animations.at(sprite.animationId).frameIndices.at(sprite.animationFrame));
     const SDL_Rect& src = frame.srcRect;
     SDL_Rect dest { sprite.loc.x() - frame.center.x(), sprite.loc.y() - frame.center.y(), frame.size.w(), frame.size.h() };
+    if (sprite.bobbing) {
+      dest.y -= sprite.bobAmount;
+    }
     SDL_RenderCopy(ren_.get(), textures_.at(loadImageFromFile(sprite.spritesheet)).get(), &src, &dest);
   }
 }
@@ -40,7 +40,8 @@ ScriptSystem::ScriptSystem(Game& game) : game_(game) {
     "persistent", &Sprite::persistent,
     "paused", &Sprite::paused,
     "clipping", &Sprite::clipping,
-    "cantCrouch", &Sprite::cantCrouch);
+    "cantCrouch", &Sprite::cantCrouch,
+    "bobsWhenNormal", &Sprite::bobsWhenNormal);
 
   engine_.new_usertype<MessageSystem>(
     "message",
@@ -64,7 +64,7 @@ public:
   std::string walkthroughScript;
   std::string enclosureZone;
 
-  // Animation
+  // Animation (internals)
   bool isAnimated = false;
   std::string spritesheet;
   Direction dir = Direction::down;
@@ -76,8 +76,13 @@ public:
   std::map<std::string, std::map<Direction, int>> nameDirToAnim;
   bool animFinished = false;
   bool hasShadow = false;
+  int bobAmount = 0;
+  bool bobbingDown = false;
+
+  // Animation (controls)
   bool normallyHasShadow = false;
   bool animPaused = false;
+  bool bobbing = false;
 
   // Character
   bool orientable = false;
@@ -92,6 +97,7 @@ public:
   int runningSfxChannel = -1;
   bool clipping = false;
   bool cantCrouch = false; // Use this to prevent running
+  bool bobsWhenNormal = false; // If enabled, sets the animation bobbing flag whenever medium is Normal
 
   // Input
   bool controllable = false;