From bcdd48d622899b3d32e0e86002a427fff9166118 Mon Sep 17 00:00:00 2001
From: Sergio Valor <jaildesigner@gmail.com>
Date: Wed, 1 Oct 2025 17:49:29 +0200
Subject: [PATCH] carrusel funcional i acabat

---
 source/scoreboard.cpp | 55 ++++++++++++++++++++++++++++++++++++++++++-
 source/scoreboard.h   |  1 +
 2 files changed, 55 insertions(+), 1 deletion(-)

diff --git a/source/scoreboard.cpp b/source/scoreboard.cpp
index 92ffa79..9c2e8e4 100644
--- a/source/scoreboard.cpp
+++ b/source/scoreboard.cpp
@@ -301,7 +301,7 @@ void Scoreboard::renderEnterNameMode(size_t panel_index) {
     text_->writeDX(Text::CENTER | Text::COLOR, slot4_3_.x, slot4_3_.y, enter_name_.at(panel_index), 1, text_color2_);
 
     // CARRUSEL
-    text_->writeDX(Text::CENTER | Text::COLOR, slot4_4_.x, slot4_4_.y, carousel_.at(panel_index), 1, animated_color_);
+    renderCarousel(panel_index, slot4_4_.x, slot4_4_.y);
 }
 
 void Scoreboard::renderShowNameMode(size_t panel_index) {
@@ -430,4 +430,57 @@ void Scoreboard::renderSeparator() {
     auto color = param.scoreboard.separator_autocolor ? color_.DARKEN() : param.scoreboard.separator_color;
     SDL_SetRenderDrawColor(renderer_, color.r, color.g, color.b, 255);
     SDL_RenderLine(renderer_, 0, 0, rect_.w, 0);
+}
+
+// Pinta el carrusel de caracteres con efecto de color LERP
+void Scoreboard::renderCarousel(size_t panel_index, int center_x, int y) {
+    const std::string& carousel = carousel_.at(panel_index);
+    if (carousel.empty()) {
+        return;
+    }
+
+    // Espacio extra entre letras (además del ancho natural de cada letra)
+    constexpr int EXTRA_SPACING = 2;
+
+    // Índice de la letra central
+    const int CENTER_INDEX = carousel.size() / 2;
+
+    // Calcular el ancho acumulado antes de la letra central
+    int width_before_center = 0;
+    for (int i = 0; i < CENTER_INDEX; ++i) {
+        std::string ch(1, carousel[i]);
+        width_before_center += text_->length(ch, 1) + EXTRA_SPACING;
+    }
+
+    // Calcular posición inicial para que la letra central esté centrada en center_x
+    std::string center_char(1, carousel[CENTER_INDEX]);
+    const int CENTER_CHAR_WIDTH = text_->length(center_char, 1);
+    const int CAROUSEL_START_X = center_x - width_before_center - (CENTER_CHAR_WIDTH / 2);
+
+    // Pintar cada letra individualmente
+    int current_x = CAROUSEL_START_X;
+    for (size_t i = 0; i < carousel.size(); ++i) {
+        std::string single_char(1, carousel[i]);
+
+        Color letter_color;
+
+        if (static_cast<int>(i) == CENTER_INDEX) {
+            // Letra central: usa animated_color_ sin modificar
+            letter_color = animated_color_;
+        } else {
+            // Letras laterales: LERP desde text_color1_ hacia color_, pero sin llegar al 100%
+            const int DISTANCE = std::abs(static_cast<int>(i) - CENTER_INDEX);
+            const float MAX_DISTANCE = static_cast<float>(CENTER_INDEX);
+            // Limitar el fade al 70% para que las letras sigan siendo visibles
+            const float LERP_FACTOR = (MAX_DISTANCE > 0) ? ((DISTANCE / MAX_DISTANCE) * 0.7f) : 0.0f;
+
+            letter_color = text_color1_.LERP(color_, LERP_FACTOR);
+        }
+
+        // Pintar la letra
+        text_->writeDX(Text::COLOR, current_x, y, single_char, 1, letter_color);
+
+        // Avanzar posición X: ancho del caracter + espacio extra
+        current_x += text_->length(single_char, 1) + EXTRA_SPACING;
+    }
 }
\ No newline at end of file
diff --git a/source/scoreboard.h b/source/scoreboard.h
index 28f927b..e7e5041 100644
--- a/source/scoreboard.h
+++ b/source/scoreboard.h
@@ -130,6 +130,7 @@ class Scoreboard {
         void renderNameInputField(size_t panel_index);
         void renderShowNameMode(size_t panel_index);
         void renderGameCompletedMode(size_t panel_index);
+        void renderCarousel(size_t panel_index, int center_x, int y);  // Pinta el carrusel de caracteres con colores LERP
 
         // --- Constructores y destructor privados (singleton) ---
         Scoreboard();   // Constructor privado