feat(render): halo neon proporcional al bounding_radius de la shape (opt-out a text)

source/core/defaults/effects.hpp

@@ -5,6 +5,32 @@
 
 #include <SDL3/SDL.h>
 
+namespace Defaults::FX::Glow {
+
+    // Neon glow per outline gruixut, aplicat automàticament per renderShape.
+    // Els gruixos d'halo són RÀTIOS del bounding_radius de la shape (escalat
+    // per scale), de manera que un pentàgon (radi 20) té halo gros i una bala
+    // (radi 3) té halo subtil. El core (últim pass) usa el gruix de línia
+    // global (1.5px) — no escala amb la shape.
+    //
+    // Cap superior: si la shape és molt gran (logos del títol, intro), el
+    // bounding_radius es satura a aquest valor — així cap shape té més
+    // glow que el pentàgon (referència de gameplay).
+    constexpr float MAX_REFERENCE_RADIUS = 20.0F;
+
+    struct Pass {
+        float thickness_ratio;  // % del bounding_radius*scale. <0 → usa core (gruix global)
+        float alpha;
+    };
+    constexpr Pass PASSES[] = {
+        {.thickness_ratio = 0.55F, .alpha = 0.07F},
+        {.thickness_ratio = 0.35F, .alpha = 0.14F},
+        {.thickness_ratio = 0.20F, .alpha = 0.28F},
+        {.thickness_ratio = -1.0F, .alpha = 1.0F},  // core: línia "real"
+    };
+
+}  // namespace Defaults::FX::Glow
+
 namespace Defaults::FX::Firework {
 
     // Color per defecte. La caller pot fer override (p.ex. heretar del pare),

source/core/graphics/shape.cpp

@@ -4,156 +4,171 @@
 #include "core/graphics/shape.hpp"
 
 #include <algorithm>
+#include <cmath>
 #include <fstream>
 #include <iostream>
 #include <sstream>
 
 namespace Graphics {
 
-Shape::Shape(const std::string& filepath)
+    Shape::Shape(const std::string& filepath)
-    : center_({.x = 0.0F, .y = 0.0F}),
+        : center_({.x = 0.0F, .y = 0.0F}),
 
-      nom_("unnamed") {
+          nom_("unnamed") {
-    load(filepath);
+        load(filepath);
-}
-
-auto Shape::load(const std::string& filepath) -> bool {
-    // Llegir file
-    std::ifstream file(filepath);
-    if (!file.is_open()) {
-        std::cerr << "[Shape] Error: no es pot obrir " << filepath << '\n';
-        return false;
     }
 
-    // Llegir todo el contingut
+    auto Shape::load(const std::string& filepath) -> bool {
-    std::stringstream buffer;
+        // Llegir file
-    buffer << file.rdbuf();
+        std::ifstream file(filepath);
-    std::string contingut = buffer.str();
+        if (!file.is_open()) {
-    file.close();
+            std::cerr << "[Shape] Error: no es pot obrir " << filepath << '\n';
-
+            return false;
-    // Parsejar
-    return parseFile(contingut);
-}
-
-auto Shape::parseFile(const std::string& contingut) -> bool {
-    std::istringstream iss(contingut);
-    std::string line;
-
-    while (std::getline(iss, line)) {
-        // Trim whitespace
-        line = trim(line);
-
-        // Skip comments and blanks
-        if (line.empty() || line[0] == '#') {
-            continue;
         }
 
-        // Parse command
+        // Llegir todo el contingut
-        if (startsWith(line, "name:")) {
+        std::stringstream buffer;
-            nom_ = trim(extractValue(line));
+        buffer << file.rdbuf();
-        } else if (startsWith(line, "scale:")) {
+        std::string contingut = buffer.str();
-            try {
+        file.close();
-                escala_defecte_ = std::stof(extractValue(line));
+
-            } catch (...) {
+        // Parsejar
-                std::cerr << "[Shape] Warning: scale invàlida, usant 1.0" << '\n';
+        return parseFile(contingut);
-                escala_defecte_ = 1.0F;
+    }
+
+    auto Shape::parseFile(const std::string& contingut) -> bool {
+        std::istringstream iss(contingut);
+        std::string line;
+
+        while (std::getline(iss, line)) {
+            // Trim whitespace
+            line = trim(line);
+
+            // Skip comments and blanks
+            if (line.empty() || line[0] == '#') {
+                continue;
             }
-        } else if (startsWith(line, "center:")) {
+
-            parseCenter(extractValue(line));
+            // Parse command
-        } else if (startsWith(line, "polyline:")) {
+            if (startsWith(line, "name:")) {
-            auto points = parsePoints(extractValue(line));
+                nom_ = trim(extractValue(line));
-            if (points.size() >= 2) {
+            } else if (startsWith(line, "scale:")) {
-                primitives_.push_back({PrimitiveType::POLYLINE, points});
+                try {
-            } else {
+                    escala_defecte_ = std::stof(extractValue(line));
-                std::cerr << "[Shape] Warning: polyline con menys de 2 points ignorada"
+                } catch (...) {
-                          << '\n';
+                    std::cerr << "[Shape] Warning: scale invàlida, usant 1.0" << '\n';
+                    escala_defecte_ = 1.0F;
+                }
+            } else if (startsWith(line, "center:")) {
+                parseCenter(extractValue(line));
+            } else if (startsWith(line, "polyline:")) {
+                auto points = parsePoints(extractValue(line));
+                if (points.size() >= 2) {
+                    primitives_.push_back({PrimitiveType::POLYLINE, points});
+                } else {
+                    std::cerr << "[Shape] Warning: polyline con menys de 2 points ignorada"
+                              << '\n';
+                }
+            } else if (startsWith(line, "line:")) {
+                auto points = parsePoints(extractValue(line));
+                if (points.size() == 2) {
+                    primitives_.push_back({PrimitiveType::LINE, points});
+                } else {
+                    std::cerr << "[Shape] Warning: line ha de tenir exactament 2 points"
+                              << '\n';
+                }
             }
-        } else if (startsWith(line, "line:")) {
+            // Comandes desconegudes ignorades silenciosament
-            auto points = parsePoints(extractValue(line));
+        }
-            if (points.size() == 2) {
+
-                primitives_.push_back({PrimitiveType::LINE, points});
+        if (primitives_.empty()) {
-            } else {
+            std::cerr << "[Shape] Error: sin primitiva carregada" << '\n';
-                std::cerr << "[Shape] Warning: line ha de tenir exactament 2 points"
+            return false;
-                          << '\n';
+        }
+
+        bounding_radius_ = computeBoundingRadius(primitives_, center_);
+        return true;
+    }
+
+    auto Shape::computeBoundingRadius(const std::vector<ShapePrimitive>& primitives,
+        const Vec2& center) -> float {
+        float max_dist_sq = 0.0F;
+        for (const auto& prim : primitives) {
+            for (const auto& p : prim.points) {
+                const float DX = p.x - center.x;
+                const float DY = p.y - center.y;
+                max_dist_sq = std::max(max_dist_sq, (DX * DX) + (DY * DY));
             }
         }
-        // Comandes desconegudes ignorades silenciosament
+        return std::sqrt(max_dist_sq);
     }
 
-    if (primitives_.empty()) {
+    // Helper: trim whitespace
-        std::cerr << "[Shape] Error: sin primitiva carregada" << '\n';
+    auto Shape::trim(const std::string& str) -> std::string {
-        return false;
+        const char* whitespace = " \t\n\r";
-    }
+        size_t start = str.find_first_not_of(whitespace);
-
+        if (start == std::string::npos) {
-    return true;
+            return "";
-}
-
-// Helper: trim whitespace
-auto Shape::trim(const std::string& str) -> std::string {
-    const char* whitespace = " \t\n\r";
-    size_t start = str.find_first_not_of(whitespace);
-    if (start == std::string::npos) {
-        return "";
-    }
-
-    size_t end = str.find_last_not_of(whitespace);
-    return str.substr(start, end - start + 1);
-}
-
-// Helper: startsWith
-auto Shape::startsWith(const std::string& str,
-    const std::string& prefix) -> bool {
-    if (str.length() < prefix.length()) {
-        return false;
-    }
-    return str.starts_with(prefix);
-}
-
-// Helper: extract value after ':'
-auto Shape::extractValue(const std::string& line) -> std::string {
-    size_t colon = line.find(':');
-    if (colon == std::string::npos) {
-        return "";
-    }
-    return line.substr(colon + 1);
-}
-
-// Helper: parse center "x, y"
-void Shape::parseCenter(const std::string& value) {
-    std::string val = trim(value);
-    size_t comma = val.find(',');
-    if (comma != std::string::npos) {
-        try {
-            center_.x = std::stof(trim(val.substr(0, comma)));
-            center_.y = std::stof(trim(val.substr(comma + 1)));
-        } catch (...) {
-            std::cerr << "[Shape] Warning: centro invàlid, usant (0,0)" << '\n';
-            center_ = {.x = 0.0F, .y = 0.0F};
         }
+
+        size_t end = str.find_last_not_of(whitespace);
+        return str.substr(start, end - start + 1);
     }
-}
 
-// Helper: parse points "x1,y1  x2,y2  x3,y3"
+    // Helper: startsWith
-auto Shape::parsePoints(const std::string& str) -> std::vector<Vec2> {
+    auto Shape::startsWith(const std::string& str,
-    std::vector<Vec2> points;
+        const std::string& prefix) -> bool {
-    std::istringstream iss(trim(str));
+        if (str.length() < prefix.length()) {
-    std::string pair;
+            return false;
+        }
+        return str.starts_with(prefix);
+    }
 
-    while (iss >> pair) {  // Whitespace-separated
+    // Helper: extract value after ':'
-        size_t comma = pair.find(',');
+    auto Shape::extractValue(const std::string& line) -> std::string {
+        size_t colon = line.find(':');
+        if (colon == std::string::npos) {
+            return "";
+        }
+        return line.substr(colon + 1);
+    }
+
+    // Helper: parse center "x, y"
+    void Shape::parseCenter(const std::string& value) {
+        std::string val = trim(value);
+        size_t comma = val.find(',');
         if (comma != std::string::npos) {
             try {
-                float x = std::stof(pair.substr(0, comma));
+                center_.x = std::stof(trim(val.substr(0, comma)));
-                float y = std::stof(pair.substr(comma + 1));
+                center_.y = std::stof(trim(val.substr(comma + 1)));
-                points.push_back({x, y});
             } catch (...) {
-                std::cerr << "[Shape] Warning: point invàlid ignorat: " << pair
+                std::cerr << "[Shape] Warning: centro invàlid, usant (0,0)" << '\n';
-                          << '\n';
+                center_ = {.x = 0.0F, .y = 0.0F};
             }
         }
     }
 
-    return points;
+    // Helper: parse points "x1,y1  x2,y2  x3,y3"
-}
+    auto Shape::parsePoints(const std::string& str) -> std::vector<Vec2> {
+        std::vector<Vec2> points;
+        std::istringstream iss(trim(str));
+        std::string pair;
+
+        while (iss >> pair) {  // Whitespace-separated
+            size_t comma = pair.find(',');
+            if (comma != std::string::npos) {
+                try {
+                    float x = std::stof(pair.substr(0, comma));
+                    float y = std::stof(pair.substr(comma + 1));
+                    points.push_back({x, y});
+                } catch (...) {
+                    std::cerr << "[Shape] Warning: point invàlid ignorat: " << pair
+                              << '\n';
+                }
+            }
+        }
+
+        return points;
+    }
 
 }  // namespace Graphics

source/core/graphics/shape.hpp

@@ -11,21 +11,21 @@
 
 namespace Graphics {
 
-// Tipo de primitiva dins de una shape
+    // Tipo de primitiva dins de una shape
-enum class PrimitiveType : std::uint8_t {
+    enum class PrimitiveType : std::uint8_t {
-    POLYLINE,  // Secuencia de points connectats
+        POLYLINE,  // Secuencia de points connectats
-    LINE       // Línia individual (2 points)
+        LINE       // Línia individual (2 points)
-};
+    };
 
-// Primitiva individual (polyline o line)
+    // Primitiva individual (polyline o line)
-struct ShapePrimitive {
+    struct ShapePrimitive {
         PrimitiveType type;
         std::vector<Vec2> points;  // 2+ points per polyline, exactament 2 per line
-};
+    };
 
-// Clase Shape - representa una shape vectorial carregada desde .shp
+    // Clase Shape - representa una shape vectorial carregada desde .shp
-class Shape {
+    class Shape {
-    public:
+       public:
         // Constructors
         Shape() = default;
         explicit Shape(const std::string& filepath);
@@ -42,18 +42,22 @@ class Shape {
         }
         [[nodiscard]] auto getCenter() const -> const Vec2& { return center_; }
         [[nodiscard]] auto getDefaultScale() const -> float { return escala_defecte_; }
+        // Distància màx. del center_ al vèrtex més llunyà; ús: dimensionar
+        // efectes proporcionals a la mida de la shape (halos, glow).
+        [[nodiscard]] auto getBoundingRadius() const -> float { return bounding_radius_; }
         [[nodiscard]] auto isValid() const -> bool { return !primitives_.empty(); }
 
         // Info de depuració
         [[nodiscard]] auto getName() const -> const std::string& { return nom_; }
         [[nodiscard]] auto getNumPrimitives() const -> size_t { return primitives_.size(); }
 
-    private:
+       private:
         std::vector<ShapePrimitive> primitives_;
-        Vec2 center_;                 // Centro/origin de la shape
+        Vec2 center_;                  // Centro/origin de la shape
-        float escala_defecte_{1.0F};  // Escala per defecte (normalment 1.0). Inicializada para
+        float escala_defecte_{1.0F};   // Escala per defecte (normalment 1.0). Inicializada para
-                                      // que el ctor por defecto no deje el campo indeterminado.
+                                       // que el ctor por defecto no deje el campo indeterminado.
-        std::string nom_;             // Nom de la shape (per depuració)
+        float bounding_radius_{0.0F};  // Distància màx. del center_ al vèrtex més llunyà.
+        std::string nom_;              // Nom de la shape (per depuració)
 
         // Helpers privats per parsejar. Son estáticos: no necesitan estado
         // de instancia, trabajan sobre el string pasado por parámetro.
@@ -62,6 +66,9 @@ class Shape {
         [[nodiscard]] static auto extractValue(const std::string& line) -> std::string;
         void parseCenter(const std::string& value);
         [[nodiscard]] static auto parsePoints(const std::string& str) -> std::vector<Vec2>;
-};
+        [[nodiscard]] static auto computeBoundingRadius(
+            const std::vector<ShapePrimitive>& primitives,
+            const Vec2& center) -> float;
+    };
 
 }  // namespace Graphics

source/core/graphics/vector_text.cpp

@@ -221,7 +221,8 @@ namespace Graphics {
                 // Ajustar X e Y para que position represente esquina superior izquierda
                 // (render_shape espera el centro, así que sumamos la mitad de ancho y altura)
                 Vec2 char_pos = {.x = current_x + (CHAR_WIDTH_SCALED / 2.0F), .y = position.y + (CHAR_HEIGHT_SCALED / 2.0F)};
-                Rendering::renderShape(renderer_, it->second, char_pos, 0.0F, scale, 1.0F, brightness, color);
+                // Text opt-out del glow: HUD/marker s'ha de mantenir net.
+                Rendering::renderShape(renderer_, it->second, char_pos, 0.0F, scale, 1.0F, brightness, color, 0.0F, 1.0F, /*glow=*/false);
 
                 // Avanzar posición
                 current_x += CHAR_WIDTH_SCALED + SPACING_SCALED;

source/core/rendering/line_renderer.cpp

@@ -22,7 +22,8 @@ namespace Rendering {
         int y2,
         float brightness,
         float thickness,
-        SDL_Color color) {
+        SDL_Color color,
+        float alpha) {
         if (renderer == nullptr) {
             return;
         }
@@ -42,7 +43,7 @@ namespace Rendering {
 
         const float W = (thickness > 0.0F) ? thickness : g_current_line_thickness;
 
-        renderer->pushLine(FX1, FY1, FX2, FY2, W, R, G, B, 1.0F);
+        renderer->pushLine(FX1, FY1, FX2, FY2, W, R, G, B, alpha);
     }
 
     void setLineColor(SDL_Color color) { g_current_line_color = color; }

source/core/rendering/line_renderer.hpp

@@ -17,9 +17,13 @@ namespace Rendering {
 
     // Dibuja una línea entre dos puntos en coordenadas lógicas (1280×720).
     // brightness: factor de brillo (0.0..1.0, default 1.0 = brillo máximo).
+    //             Pre-multiplica el RGB del color (color dim sobre fons negre).
     // thickness: grosor en píxeles lógicos. Si <= 0 usa g_current_line_thickness.
     // color: si alpha==0, se usa el color global del oscilador; si alpha>0 se
     //        usa este color directo (paleta semántica por entidad).
+    // alpha: alpha que arriba al GPU (default 1.0 = opac, behavior original).
+    //        Valors <1.0 fan que la línia es barregi de veritat sobre el dest
+    //        en comptes de sobrepintar-lo (útil per halos translúcids).
     void linea(Renderer* renderer,
         int x1,
         int y1,
@@ -27,7 +31,8 @@ namespace Rendering {
         int y2,
         float brightness = 1.0F,
         float thickness = 0.0F,
-        SDL_Color color = {0, 0, 0, 0});
+        SDL_Color color = {0, 0, 0, 0},
+        float alpha = 1.0F);
 
     // Color global de las líneas (lo actualiza ColorOscillator vía SDLManager).
     void setLineColor(SDL_Color color);

source/core/rendering/shape_renderer.cpp

@@ -3,31 +3,77 @@
 
 #include "core/rendering/shape_renderer.hpp"
 
+#include <algorithm>
 #include <cmath>
 
+#include "core/defaults/effects.hpp"
+#include "core/graphics/shape.hpp"
 #include "core/rendering/line_renderer.hpp"
 
 namespace Rendering {
 
     // Helper: transformar un point con rotación, scale i traslación
     static auto transformPoint(const Vec2& point, const Vec2& shape_centre, const Vec2& position, float angle, float scale) -> Vec2 {
-        // 1. Centrar el point respecte al centro de la shape
+        const float CENTERED_X = point.x - shape_centre.x;
-        float centered_x = point.x - shape_centre.x;
+        const float CENTERED_Y = point.y - shape_centre.y;
-        float centered_y = point.y - shape_centre.y;
 
-        // 2. Aplicar scale al point
+        const float SCALED_X = CENTERED_X * scale;
-        float scaled_x = centered_x * scale;
+        const float SCALED_Y = CENTERED_Y * scale;
-        float scaled_y = centered_y * scale;
 
-        // 3. Aplicar rotación 2D (Z-axis)
+        const float COS_A = std::cos(angle);
-        float cos_a = std::cos(angle);
+        const float SIN_A = std::sin(angle);
-        float sin_a = std::sin(angle);
 
-        float rotated_x = (scaled_x * cos_a) - (scaled_y * sin_a);
+        const float ROTATED_X = (SCALED_X * COS_A) - (SCALED_Y * SIN_A);
-        float rotated_y = (scaled_x * sin_a) + (scaled_y * cos_a);
+        const float ROTATED_Y = (SCALED_X * SIN_A) + (SCALED_Y * COS_A);
 
-        // 4. Aplicar traslación a posición mundial
+        return {.x = ROTATED_X + position.x, .y = ROTATED_Y + position.y};
-        return {.x = rotated_x + position.x, .y = rotated_y + position.y};
+    }
+
+    // Una passada de renderitzat: itera primitives de la shape i emet línies
+    // amb el thickness/alpha indicats. Es crida N vegades en glow mode (una
+    // per pass de halo + core), o 1 vegada quan glow=false.
+    static void renderSinglePass(Rendering::Renderer* renderer,
+        const std::shared_ptr<Graphics::Shape>& shape,
+        const Vec2& position,
+        float angle,
+        float scale,
+        float brightness,
+        SDL_Color color,
+        float thickness,
+        float alpha) {
+        const Vec2& shape_centre = shape->getCenter();
+
+        // Petita extensió a línies gruixudes per tapar forats entre segments.
+        // A vèrtex aguts (~108°) un valor alt produeix "espigues" — 15%.
+        const float EFFECTIVE_T = (thickness > 0.0F) ? thickness : getLineThickness();
+        const float EXTEND = (EFFECTIVE_T > 2.0F) ? (EFFECTIVE_T * 0.15F) : 0.0F;
+
+        for (const auto& primitive : shape->getPrimitives()) {
+            if (primitive.type == Graphics::PrimitiveType::POLYLINE) {
+                for (size_t i = 0; i < primitive.points.size() - 1; i++) {
+                    Vec2 p1 = transformPoint(primitive.points[i], shape_centre, position, angle, scale);
+                    Vec2 p2 = transformPoint(primitive.points[i + 1], shape_centre, position, angle, scale);
+                    if (EXTEND > 0.0F) {
+                        const float DX = p2.x - p1.x;
+                        const float DY = p2.y - p1.y;
+                        const float LEN = std::sqrt((DX * DX) + (DY * DY));
+                        if (LEN > 1e-6F) {
+                            const float UX = (DX / LEN) * EXTEND;
+                            const float UY = (DY / LEN) * EXTEND;
+                            p1.x -= UX;
+                            p1.y -= UY;
+                            p2.x += UX;
+                            p2.y += UY;
+                        }
+                    }
+                    linea(renderer, static_cast<int>(p1.x), static_cast<int>(p1.y), static_cast<int>(p2.x), static_cast<int>(p2.y), brightness, thickness, color, alpha);
+                }
+            } else if (primitive.points.size() >= 2) {  // LINE
+                const Vec2 P1 = transformPoint(primitive.points[0], shape_centre, position, angle, scale);
+                const Vec2 P2 = transformPoint(primitive.points[1], shape_centre, position, angle, scale);
+                linea(renderer, static_cast<int>(P1.x), static_cast<int>(P1.y), static_cast<int>(P2.x), static_cast<int>(P2.y), brightness, thickness, color, alpha);
+            }
+        }
     }
 
     void renderShape(Rendering::Renderer* renderer,
@@ -37,7 +83,10 @@ namespace Rendering {
         float scale,
         float progress,
         float brightness,
-        SDL_Color color) {
+        SDL_Color color,
+        float thickness,
+        float alpha,
+        bool glow) {
         if (!shape || !shape->isValid()) {
             return;
         }
@@ -45,21 +94,26 @@ namespace Rendering {
             return;
         }
 
-        const Vec2& shape_centre = shape->getCenter();
+        if (!glow) {
+            renderSinglePass(renderer, shape, position, angle, scale, brightness, color, thickness, alpha);
+            return;
+        }
 
-        for (const auto& primitive : shape->getPrimitives()) {
+        // Glow: multi-pass amb halos translúcids proporcionals al tamany de
-            if (primitive.type == Graphics::PrimitiveType::POLYLINE) {
+        // la shape. Cada pass amb thickness_ratio<0 usa el thickness/alpha
-                // POLYLINE: conectar puntos consecutivos.
+        // que ha passat el caller (és el "core" / línia real). Saturem la
-                for (size_t i = 0; i < primitive.points.size() - 1; i++) {
+        // mida de referència a MAX_REFERENCE_RADIUS perquè shapes molt
-                    const Vec2 P1 = transformPoint(primitive.points[i], shape_centre, position, angle, scale);
+        // grans (logos) no tinguin halo desproporcionat.
-                    const Vec2 P2 = transformPoint(primitive.points[i + 1], shape_centre, position, angle, scale);
+        const float RAW_REF = shape->getBoundingRadius() * scale;
-                    linea(renderer, static_cast<int>(P1.x), static_cast<int>(P1.y), static_cast<int>(P2.x), static_cast<int>(P2.y), brightness, 0.0F, color);
+        const float REFERENCE_SIZE = std::min(RAW_REF, Defaults::FX::Glow::MAX_REFERENCE_RADIUS);
-                }
+        for (const auto& pass : Defaults::FX::Glow::PASSES) {
-            } else if (primitive.points.size() >= 2) {  // LINE
+            float pass_thickness = thickness;
-                const Vec2 P1 = transformPoint(primitive.points[0], shape_centre, position, angle, scale);
+            float pass_alpha = alpha;
-                const Vec2 P2 = transformPoint(primitive.points[1], shape_centre, position, angle, scale);
+            if (pass.thickness_ratio > 0.0F) {
-                linea(renderer, static_cast<int>(P1.x), static_cast<int>(P1.y), static_cast<int>(P2.x), static_cast<int>(P2.y), brightness, 0.0F, color);
+                pass_thickness = REFERENCE_SIZE * pass.thickness_ratio;
+                pass_alpha = pass.alpha * alpha;  // respecta el master alpha del caller
             }
+            renderSinglePass(renderer, shape, position, angle, scale, brightness, color, pass_thickness, pass_alpha);
         }
     }
 

source/core/rendering/shape_renderer.hpp

@@ -21,6 +21,11 @@ namespace Rendering {
     // - scale: factor de scale (1.0 = mida original)
     // - progress: progrés de l'animación (0.0-1.0, default 1.0 = tot visible)
     // - brightness: factor de brightness (0.0-1.0, default 1.0 = màxima brightness)
+    // - color: si alpha==0, usa oscil·lador global
+    // - thickness: gruix de línia. <=0 → usa global (g_current_line_thickness)
+    // - alpha: alpha que arriba al GPU (default 1.0 = opac). <1.0 = halo real
+    // - glow: si true, redibuixa la shape amb halos translúcids proporcionals
+    //         al bounding_radius*scale (efecte neon). Si false, single-pass.
     void renderShape(Rendering::Renderer* renderer,
         const std::shared_ptr<Graphics::Shape>& shape,
         const Vec2& position,
@@ -28,6 +33,9 @@ namespace Rendering {
         float scale = 1.0F,
         float progress = 1.0F,
         float brightness = 1.0F,
-        SDL_Color color = {0, 0, 0, 0});  // alpha==0 → usa global oscilador
+        SDL_Color color = {0, 0, 0, 0},
+        float thickness = 0.0F,
+        float alpha = 1.0F,
+        bool glow = true);
 
 }  // namespace Rendering