4 files changed, 62 insertions, 1 deletions

@@ -18,6 +18,7 @@ Game::Game(std::mt19937& rng, Muxer& muxer, Renderer& renderer) :
 {
   losePopLampTimer.accumulate(losePopLampTimer.getDt());
   initialFade.start(1000);
+  helpProgress.start(1500);
 
   do {
     loadMap();
@@ -954,6 +955,44 @@ void Game::updatePlaying(size_t frameTime) {
     }
   }
 
+  switch (helpState) {
+    case HelpState::PreWait: {
+      helpProgress.tick(frameTime);
+      if (helpProgress.isComplete()) {
+        helpState = HelpState::FadeIn;
+        helpProgress.start(1000);
+      }
+      break;
+    }
+    case HelpState::FadeIn: {
+      helpProgress.tick(frameTime);
+      if (helpProgress.isComplete()) {
+        helpState = HelpState::Hold;
+        helpProgress.start(3000);
+      }
+      break;
+    }
+    case HelpState::Hold: {
+      helpProgress.tick(frameTime);
+      if (helpProgress.isComplete()) {
+        helpState = HelpState::FadeOut;
+        helpProgress.start(1000);
+      }
+      break;
+    }
+    case HelpState::FadeOut: {
+      helpProgress.tick(frameTime);
+      if (helpProgress.isComplete()) {
+        helpState = HelpState::Done;
+      }
+      break;
+    }
+    case HelpState::Done: {
+      // Do nothing.
+      break;
+    }
+  }
+
   switch (signInstructionState) {
     case SignInstructionState::Hidden: {
       auto [lookX, lookY] = coordInDirection(player_x, player_y, playerAnim.getDirection());
@@ -30,6 +30,14 @@ enum class LoseState {
   Done
 };
 
+enum class HelpState {
+  PreWait,
+  FadeIn,
+  Hold,
+  FadeOut,
+  Done
+};
+
 struct Input {
   bool left = false;
   bool right = false;
@@ -72,6 +80,8 @@ public:
 
   Interpolation initialFade;
   bool startedMusic = false;
+  HelpState helpState = HelpState::PreWait;
+  Interpolation helpProgress;
 
   Map map;
   std::list<Kickup> kickups;
@@ -120,6 +120,7 @@ void Renderer::loadAllTextures() {
   loadTextureFromFile("lamp.png", lamp_);
   loadTextureFromFile("read_instruction.png", readInstruction_);
   loadTextureFromFile("menu.png", menuBg_);
+  loadTextureFromFile("help.png", help_);
 
   loadTextureFromFile("title0.png", titles_[0]);
   SDL_QueryTexture(titles_[0].get(), nullptr, nullptr, &titleWidths_[0], &titleHeights_[0]);
@@ -424,7 +425,17 @@ void Renderer::renderGame(
   SDL_SetRenderDrawColor(ren_.get(), 0, 0, 0, 0);
   SDL_RenderClear(ren_.get());
 
-  if (game.signInstructionState != SignInstructionState::Hidden) {
+  if (game.helpState == HelpState::FadeIn || game.helpState == HelpState::Hold || game.helpState == HelpState::FadeOut) {
+    int instOpacity = 255;
+    if (game.helpState == HelpState::FadeIn) {
+      instOpacity = game.helpProgress.getProgress(0, 255);
+    } else if (game.helpState == HelpState::FadeOut) {
+      instOpacity = game.helpProgress.getProgress(255, 0);
+    }
+
+    SDL_SetTextureAlphaMod(help_.get(), instOpacity);
+    SDL_RenderCopy(ren_.get(), help_.get(), nullptr, nullptr);
+  } else if (game.signInstructionState != SignInstructionState::Hidden) {
     int instOpacity = 255;
     if (game.signInstructionState == SignInstructionState::FadingIn) {
       instOpacity = game.signFade.getProgress(0, 255);
@@ -187,6 +187,7 @@ private:
   texture_ptr lamp_;
   texture_ptr readInstruction_;
   texture_ptr menuBg_;
+  texture_ptr help_;
 
   std::array<texture_ptr, NUM_TITLES> titles_;
   std::array<int, NUM_TITLES> titleWidths_;