efecte maquina d'escriure per als textos d'entrada de fase

source/game/escenes/escena_joc.cpp

@@ -368,7 +368,7 @@ void EscenaJoc::dibuixar() {
             gestor_puntuacio_.dibuixar();
 
             // [EXISTING] Draw intro message and score
-            dibuixar_missatge_stage(StageSystem::Constants::MISSATGE_LEVEL_START);
+            dibuixar_missatge_stage(stage_manager_->get_missatge_level_start());
             dibuixar_marcador();
             break;
 
@@ -689,16 +689,67 @@ void EscenaJoc::detectar_col·lisio_nau_enemics() {
 // [NEW] Stage system helper methods
 
 void EscenaJoc::dibuixar_missatge_stage(const std::string& missatge) {
-    constexpr float escala = 1.0f;
+    constexpr float escala_base = 1.0f;
     constexpr float spacing = 2.0f;
-
-    float text_width = text_.get_text_width(missatge, escala, spacing);
-    float text_height = text_.get_text_height(escala);
+    constexpr float max_width_ratio = 0.9f;  // 90% del ancho disponible
 
     const SDL_FRect& play_area = Defaults::Zones::PLAYAREA;
-    float x = play_area.x + (play_area.w - text_width) / 2.0f;
+    const float max_width = play_area.w * max_width_ratio;  // 558px
+
+    // ========== TYPEWRITER EFFECT (PARAMETRIZED) ==========
+    // Get state-specific timing configuration
+    float total_time;
+    float typing_ratio;
+
+    if (stage_manager_->get_estat() == StageSystem::EstatStage::LEVEL_START) {
+        total_time = Defaults::Game::LEVEL_START_DURATION;
+        typing_ratio = Defaults::Game::LEVEL_START_TYPING_RATIO;
+    } else {  // LEVEL_COMPLETED
+        total_time = Defaults::Game::LEVEL_COMPLETED_DURATION;
+        typing_ratio = Defaults::Game::LEVEL_COMPLETED_TYPING_RATIO;
+    }
+
+    // Calculate progress from timer (0.0 at start → 1.0 at end)
+    float remaining_time = stage_manager_->get_timer_transicio();
+    float progress = 1.0f - (remaining_time / total_time);
+
+    // Determine how many characters to show
+    size_t visible_chars;
+
+    if (typing_ratio > 0.0f && progress < typing_ratio) {
+        // Typewriter phase: show partial text
+        float typing_progress = progress / typing_ratio;  // Normalize to 0.0-1.0
+        visible_chars = static_cast<size_t>(missatge.length() * typing_progress);
+        if (visible_chars == 0 && progress > 0.0f) {
+            visible_chars = 1;  // Show at least 1 character after first frame
+        }
+    } else {
+        // Display phase: show complete text
+        // (Either after typing phase, or immediately if typing_ratio == 0.0)
+        visible_chars = missatge.length();
+    }
+
+    // Create partial message (substring for typewriter)
+    std::string partial_message = missatge.substr(0, visible_chars);
+    // ===================================================
+
+    // Calculate text width at base scale (using FULL message for position calculation)
+    float text_width_at_base = text_.get_text_width(missatge, escala_base, spacing);
+
+    // Auto-scale if text exceeds max width
+    float escala = (text_width_at_base <= max_width)
+                     ? escala_base
+                     : max_width / text_width_at_base;
+
+    // Recalculate dimensions with final scale (using FULL message for centering)
+    float full_text_width = text_.get_text_width(missatge, escala, spacing);
+    float text_height = text_.get_text_height(escala);
+
+    // Calculate position as if FULL text was there (for fixed position typewriter)
+    float x = play_area.x + (play_area.w - full_text_width) / 2.0f;
     float y = play_area.y + (play_area.h * 0.25f) - (text_height / 2.0f);
 
-    Punt pos = {static_cast<float>(x), static_cast<float>(y)};
-    text_.render(missatge, pos, escala, spacing);
+    // Render only the partial message (typewriter effect)
+    Punt pos = {x, y};
+    text_.render(partial_message, pos, escala, spacing);
 }