Merge pull request #202 from orange-cpp/feature/gradient

Feature/gradient

examples/example_hud/gui/main_window.cpp

@@ -74,8 +74,8 @@ namespace imgui_desktop::gui
             if (settings.enabled)
             {
                 ImGui::ColorEdit4("Color", reinterpret_cast<float*>(&settings.color), ImGuiColorEditFlags_NoInputs);
-                ImGui::SliderFloat("Radius", &settings.radius, 1.f, 12.f);
+                ImGui::InputFloat("Radius", &settings.radius);
-                ImGui::SliderFloat("Intensity", &settings.intensity, 0.f, 1.f);
+                ImGui::InputFloat("Intensity", &settings.intensity);
             }
             ImGui::PopID();
         };
@@ -86,6 +86,12 @@ namespace imgui_desktop::gui
             ImGui::SliderFloat("Top Y", &m_entity_top_y, 20.f, m_entity_bottom_y - 20.f);
             ImGui::SliderFloat("Bottom Y", &m_entity_bottom_y, m_entity_top_y + 20.f, vp->Size.y - 20.f);
             ImGui::SliderFloat("Aspect", &m_entity_aspect, 1.f, 10.f);
+            draw_glow_controls("Canvas light", m_canvas_glow);
+            if (m_canvas_glow.enabled)
+            {
+                ImGui::InputInt("Blur layers##canvas", &m_canvas_glow_layers);
+                ImGui::InputFloat("Rounding##canvas", &m_canvas_glow_rounding);
+            }
         }
 
         if (ImGui::CollapsingHeader("Box", ImGuiTreeNodeFlags_DefaultOpen))
@@ -231,6 +237,44 @@ namespace imgui_desktop::gui
         const auto* vp = ImGui::GetMainViewport();
         const DashedBar dbar{m_bar_color, m_bar_outline_color, m_bar_bg_color, m_bar_width,
                              m_bar_value, m_bar_dash_len,      m_bar_dash_gap, m_bar_offset};
+        const float entity_height = m_entity_bottom_y - m_entity_top_y;
+        const float entity_half_width = entity_height / m_entity_aspect;
+        const auto joint = [&](const float x, const float y)
+        {
+            return omath::Vector2<float>{m_entity_x + (x * 2.f - 1.f) * entity_half_width,
+                                         m_entity_top_y + y * entity_height};
+        };
+        const auto head = joint(0.5f, 0.1f);
+        const auto neck = joint(0.5f, 0.22f);
+        const auto torso = joint(0.5f, 0.5f);
+        const auto left_shoulder = joint(0.3f, 0.25f);
+        const auto right_shoulder = joint(0.7f, 0.25f);
+        const auto left_elbow = joint(0.18f, 0.42f);
+        const auto right_elbow = joint(0.82f, 0.42f);
+        const auto left_hand = joint(0.1f, 0.58f);
+        const auto right_hand = joint(0.9f, 0.58f);
+        const auto left_hip = joint(0.4f, 0.55f);
+        const auto right_hip = joint(0.6f, 0.55f);
+        const auto left_knee = joint(0.36f, 0.75f);
+        const auto right_knee = joint(0.64f, 0.75f);
+        const auto left_foot = joint(0.3f, 0.95f);
+        const auto right_foot = joint(0.7f, 0.95f);
+        const std::array skeleton_bones = {
+                Bone{head, neck},
+                Bone{neck, torso},
+                Bone{neck, left_shoulder},
+                Bone{left_shoulder, left_elbow},
+                Bone{left_elbow, left_hand},
+                Bone{neck, right_shoulder},
+                Bone{right_shoulder, right_elbow},
+                Bone{right_elbow, right_hand},
+                Bone{torso, left_hip},
+                Bone{left_hip, left_knee},
+                Bone{left_knee, left_foot},
+                Bone{torso, right_hip},
+                Bone{right_hip, right_knee},
+                Bone{right_knee, right_foot},
+        };
         const auto animated_color = [&](const omath::Color& color, const float hue_offset)
         {
             if (!m_animate_gradients)
@@ -245,7 +289,6 @@ namespace imgui_desktop::gui
         const auto box_gradient_bottom = animated_color(m_box_gradient_bottom, 0.5f);
         const auto red = omath::Color{1.f, 0.f, 0.f, 1.f};
         const auto green = omath::Color{0.f, 1.f, 0.f, 1.f};
-        const auto bar_value_color = omath::Color{red.value() * (1.f - m_bar_value) + green.value() * m_bar_value};
         const auto make_glow = [](const GlowSettings& settings) -> std::optional<Glow>
         {
             if (!settings.enabled)
@@ -256,16 +299,9 @@ namespace imgui_desktop::gui
         const auto cornered_box_glow = make_glow(m_cornered_box_glow);
         const auto bar_glow = make_glow(m_bar_glow);
         const auto label_glow = make_glow(m_label_glow);
-        const Paint vertical_bar_color =
+        const auto canvas_glow = make_glow(m_canvas_glow);
-                m_gradient_bars ? Paint{omath::hud::Gradient{bar_value_color, bar_value_color, red, red}}
+        const BarPaint bar_color = m_gradient_bars ? BarPaint{BarGradient{red, green}} : BarPaint{m_bar_color};
-                                : Paint{m_bar_color};
+        const Bar bar{bar_color, m_bar_outline_color, m_bar_bg_color, m_bar_width, m_bar_value, m_bar_offset, bar_glow};
-        const Paint horizontal_bar_color =
-                m_gradient_bars ? Paint{omath::hud::Gradient{red, bar_value_color, bar_value_color, red}}
-                                : Paint{m_bar_color};
-        const Bar vertical_bar{vertical_bar_color, m_bar_outline_color, m_bar_bg_color, m_bar_width,
-                               m_bar_value,        m_bar_offset,        bar_glow};
-        const Bar horizontal_bar{horizontal_bar_color, m_bar_outline_color, m_bar_bg_color, m_bar_width,
-                                 m_bar_value,          m_bar_offset,        bar_glow};
         const Paint box_fill = m_gradient_box_fill
                                        ? Paint{omath::hud::Gradient{box_gradient_top, box_gradient_top,
                                                                     box_gradient_bottom, box_gradient_bottom}}
@@ -283,6 +319,8 @@ namespace imgui_desktop::gui
         omath::hud::EntityOverlay({m_entity_x, m_entity_top_y}, {m_entity_x, m_entity_bottom_y}, m_entity_aspect,
                                   std::make_shared<omath::hud::ImguiHudRenderer>())
                 .contents(
+                        when(canvas_glow.has_value(), CanvasGlow{canvas_glow.value_or(Glow{m_canvas_glow.color}),
+                                                                 m_canvas_glow_layers, m_canvas_glow_rounding}),
                         // ── Boxes ────────────────────────────────────────────────────
                         when(m_show_box, Box{m_box_color, box_fill, m_box_outline, m_box_thickness, box_glow}),
                         when(m_show_cornered_box,
@@ -290,7 +328,7 @@ namespace imgui_desktop::gui
                                          m_corner_ratio, m_box_thickness, cornered_box_glow}),
                         when(m_show_dashed_box, DashedBox{m_dash_color, m_dash_len, m_dash_gap, m_dash_thickness}),
                         RightSide{
-                                when(m_show_right_bar, vertical_bar),
+                                when(m_show_right_bar, bar),
                                 when(m_show_right_dashed_bar, dbar),
                                 when(m_show_right_labels, Label{{0.f, 1.f, 0.f, 1.f},
                                                                 m_label_offset,
@@ -310,7 +348,7 @@ namespace imgui_desktop::gui
                                                                m_ring_thickness, m_ring_offset}),
                         },
                         LeftSide{
-                                when(m_show_left_bar, vertical_bar),
+                                when(m_show_left_bar, bar),
                                 when(m_show_left_dashed_bar, dbar),
                                 when(m_show_left_labels,
                                      Label{omath::Color::from_rgba(255, 128, 0, 255), m_label_offset,
@@ -320,7 +358,7 @@ namespace imgui_desktop::gui
                                            outline_helper(m_outlined), "Level: 42"}),
                         },
                         TopSide{
-                                when(m_show_top_bar, horizontal_bar),
+                                when(m_show_top_bar, bar),
                                 when(m_show_top_dashed_bar, dbar),
                                 when(m_show_centered_top,
                                      Centered{Label{omath::Color::from_rgba(0, 255, 255, 255), m_label_offset,
@@ -331,7 +369,7 @@ namespace imgui_desktop::gui
                                                               outline_helper(m_outlined), "*BLEEDING*"}),
                         },
                         BottomSide{
-                                when(m_show_bottom_bar, horizontal_bar),
+                                when(m_show_bottom_bar, bar),
                                 when(m_show_bottom_dashed_bar, dbar),
                                 when(m_show_centered_bottom,
                                      Centered{Label{centered_label_color, m_label_offset, outline_helper(m_outlined),
@@ -341,7 +379,7 @@ namespace imgui_desktop::gui
                         },
                         when(m_show_aim, AimDot{{m_entity_x, m_entity_top_y + 40.f}, m_aim_color, m_aim_radius}),
                         when(m_show_scan, ScanMarker{m_scan_color, m_scan_outline, m_scan_outline_thickness}),
-                        when(m_show_skeleton, Skeleton{m_skel_color, m_skel_thickness}),
+                        when(m_show_skeleton, Skeleton{skeleton_bones, m_skel_color, m_skel_thickness}),
                         when(m_show_proj, ProjectileAim{{m_proj_pos_x, m_proj_pos_y},
                                                         m_proj_color,
                                                         m_proj_size,

examples/example_hud/gui/main_window.hpp

@@ -76,6 +76,9 @@ namespace imgui_desktop::gui
         GlowSettings m_cornered_box_glow{{1.f, 0.f, 1.f, 0.8f}};
         GlowSettings m_bar_glow{{1.f, 0.f, 0.f, 0.8f}};
         GlowSettings m_label_glow;
+        GlowSettings m_canvas_glow{{1.f, 0.5f, 0.f, 0.8f}, 100.f};
+        int m_canvas_glow_layers = 64;
+        float m_canvas_glow_rounding = 40.f;
 
         // Skeleton
         omath::Color m_skel_color = omath::Color::from_rgba(255, 255, 255, 200);

include/omath/hud/entity_overlay.hpp

@@ -41,19 +41,19 @@ namespace omath::hud
                                       float thickness = 1.f);
 
         // ── Bars ─────────────────────────────────────────────────────────
-        EntityOverlay& add_right_bar(const widget::Paint& color, const Color& outline_color, const Color& bg_color,
+        EntityOverlay& add_right_bar(const widget::BarPaint& color, const Color& outline_color, const Color& bg_color,
                                      float width, float ratio, float offset = 5.f,
                                      const std::optional<widget::Glow>& glow = std::nullopt);
 
-        EntityOverlay& add_left_bar(const widget::Paint& color, const Color& outline_color, const Color& bg_color,
+        EntityOverlay& add_left_bar(const widget::BarPaint& color, const Color& outline_color, const Color& bg_color,
                                     float width, float ratio, float offset = 5.f,
                                     const std::optional<widget::Glow>& glow = std::nullopt);
 
-        EntityOverlay& add_top_bar(const widget::Paint& color, const Color& outline_color, const Color& bg_color,
+        EntityOverlay& add_top_bar(const widget::BarPaint& color, const Color& outline_color, const Color& bg_color,
                                    float height, float ratio, float offset = 5.f,
                                    const std::optional<widget::Glow>& glow = std::nullopt);
 
-        EntityOverlay& add_bottom_bar(const widget::Paint& color, const Color& outline_color, const Color& bg_color,
+        EntityOverlay& add_bottom_bar(const widget::BarPaint& color, const Color& outline_color, const Color& bg_color,
                                       float height, float ratio, float offset = 5.f,
                                       const std::optional<widget::Glow>& glow = std::nullopt);
 
@@ -184,6 +184,7 @@ namespace omath::hud
         EntityOverlay& add_snap_line(const Vector2<float>& start_pos, const Color& color, float width);
 
         EntityOverlay& add_skeleton(const Color& color, float thickness = 1.f);
+        EntityOverlay& add_skeleton(std::span<const widget::Bone> bones, const Color& color, float thickness = 1.f);
 
         // ── Declarative interface ─────────────────────────────────────────
         /// Pass any combination of widget:: descriptor structs (and std::optional<W>
@@ -248,6 +249,7 @@ namespace omath::hud
         }
 
         void dispatch(const widget::Box& box);
+        void dispatch(const widget::CanvasGlow& canvas_glow);
         void dispatch(const widget::CorneredBox& cornered_box);
         void dispatch(const widget::DashedBox& dashed_box);
         void dispatch(const widget::RightSide& right_side);
@@ -268,8 +270,11 @@ namespace omath::hud
                             float thickness) const;
         void draw_glow_rectangle(const Vector2<float>& min, const Vector2<float>& max,
                                  const std::optional<widget::Glow>& glow) const;
+        void draw_canvas_glow(const widget::CanvasGlow& canvas_glow) const;
         void draw_filled_rectangle(const Vector2<float>& min, const Vector2<float>& max,
                                    const widget::Paint& paint) const;
+        [[nodiscard]]
+        static widget::Paint resolve_bar_paint(const widget::BarPaint& paint, float ratio, bool vertical);
         void draw_dashed_line(const Vector2<float>& from, const Vector2<float>& to, const Color& color, float dash_len,
                               float gap_len, float thickness) const;
         void draw_dashed_fill(const Vector2<float>& origin, const Vector2<float>& step_dir,

include/omath/hud/entity_overlay_widgets.hpp

@@ -6,10 +6,14 @@
 #include "omath/linear_algebra/vector2.hpp"
 #include "omath/utility/color.hpp"
 #include <any>
+#include <array>
 #include <initializer_list>
 #include <optional>
+#include <span>
 #include <string_view>
+#include <type_traits>
 #include <variant>
+#include <vector>
 
 namespace omath::hud::widget
 {
@@ -23,6 +27,32 @@ namespace omath::hud::widget
         }
     };
 
+    struct BarGradient
+    {
+        Color empty_color;
+        Color full_color;
+    };
+
+    struct BarPaint : std::variant<Color, Gradient, BarGradient>
+    {
+        using std::variant<Color, Gradient, BarGradient>::variant;
+
+        constexpr BarPaint(const float red, const float green, const float blue, const float alpha)
+            : std::variant<Color, Gradient, BarGradient>(Color{red, green, blue, alpha})
+        {
+        }
+
+        BarPaint(const Paint& paint)
+        {
+            std::visit(
+                    [this](const auto& value)
+                    {
+                        this->template emplace<std::decay_t<decltype(value)>>(value);
+                    },
+                    paint);
+        }
+    };
+
     // ── Overloaded helper for std::visit ──────────────────────────────────────
     template<typename... Ts>
     struct Overloaded : Ts...
@@ -39,6 +69,13 @@ namespace omath::hud::widget
         float intensity = 1.f;
     };
 
+    struct CanvasGlow
+    {
+        Glow glow;
+        int layers = 64;
+        float rounding = 20.f;
+    };
+
     // ── Standalone widgets ────────────────────────────────────────────────────
     struct Box
     {
@@ -72,10 +109,37 @@ namespace omath::hud::widget
         float thickness = 1.f;
     };
 
+    struct Bone
+    {
+        Vector2<float> start;
+        Vector2<float> end;
+    };
+
     struct Skeleton
     {
+        std::vector<Bone> bones;
         Color color;
         float thickness = 1.f;
+
+        Skeleton(const Color& color, const float thickness = 1.f): color(color), thickness(thickness)
+        {
+        }
+
+        Skeleton(const std::span<const Bone> bones, const Color& color, const float thickness = 1.f)
+            : bones(bones.begin(), bones.end()), color(color), thickness(thickness)
+        {
+        }
+
+        Skeleton(const std::initializer_list<Bone> bones, const Color& color, const float thickness = 1.f)
+            : bones(bones), color(color), thickness(thickness)
+        {
+        }
+
+        template<std::size_t Size>
+        Skeleton(const std::array<Bone, Size>& bones, const Color& color, const float thickness = 1.f)
+            : Skeleton(std::span<const Bone>{bones}, color, thickness)
+        {
+        }
     };
     struct SnapLine
     {
@@ -117,7 +181,7 @@ namespace omath::hud::widget
     /// A filled bar. `size` is width for left/right sides, height for top/bottom.
     struct Bar
     {
-        Paint color;
+        BarPaint color;
         Color outline;
         Color bg;
         float size;

include/omath/hud/hud_renderer_interface.hpp

@@ -20,6 +20,12 @@ namespace omath::hud
         virtual void add_polyline(const std::span<const Vector2<float>>& vertexes, const Color& color,
                                   float thickness) = 0;
 
+        virtual void add_polyline_clipped(const std::span<const Vector2<float>>& vertexes, const Vector2<float>&,
+                                          const Vector2<float>&, const Color& color, float thickness)
+        {
+            add_polyline(vertexes, color, thickness);
+        }
+
         virtual void add_filled_polyline(const std::span<const Vector2<float>>& vertexes, const Color& color) = 0;
 
         virtual void add_rectangle(const Vector2<float>& min, const Vector2<float>& max, const Color& color) = 0;

include/omath/hud/renderer_realizations/imgui_renderer.hpp

@@ -15,6 +15,8 @@ namespace omath::hud
                       float thickness) override;
         void add_polyline(const std::span<const Vector2<float>>& vertexes, const Color& color,
                           float thickness) override;
+        void add_polyline_clipped(const std::span<const Vector2<float>>& vertexes, const Vector2<float>& clip_min,
+                                  const Vector2<float>& clip_max, const Color& color, float thickness) override;
         void add_filled_polyline(const std::span<const Vector2<float>>& vertexes, const Color& color) override;
         void add_rectangle(const Vector2<float>& min, const Vector2<float>& max, const Color& color) override;
         void add_filled_rectangle(const Vector2<float>& min, const Vector2<float>& max, const Color& color) override;

source/hud/entity_overlay.cpp

@@ -2,6 +2,7 @@
 // Created by orange on 13.03.2026.
 //
 #include "omath/hud/entity_overlay.hpp"
+#include <limits>
 
 namespace omath::hud
 {
@@ -76,7 +77,7 @@ namespace omath::hud
 
         return *this;
     }
-    EntityOverlay& EntityOverlay::add_right_bar(const widget::Paint& color, const Color& outline_color,
+    EntityOverlay& EntityOverlay::add_right_bar(const widget::BarPaint& color, const Color& outline_color,
                                                 const Color& bg_color, const float width, float ratio,
                                                 const float offset, const std::optional<widget::Glow>& glow)
     {
@@ -84,18 +85,20 @@ namespace omath::hud
         const auto max_bar_height = std::abs(m_canvas.top_right_corner.y - m_canvas.bottom_right_corner.y);
 
         const auto bar_start = Vector2<float>{m_text_cursor_right.x + offset, m_canvas.bottom_right_corner.y};
-        m_renderer->add_filled_rectangle(bar_start, bar_start + Vector2<float>(width, -max_bar_height), bg_color);
+        const auto bar_min = bar_start - Vector2<float>{0.f, max_bar_height};
+        const auto bar_max = bar_start + Vector2<float>{width, 0.f};
+        const auto fill_min = bar_start - Vector2<float>{0.f, max_bar_height * ratio};
+        m_renderer->add_filled_rectangle(bar_min, bar_max, bg_color);
 
-        draw_glow_rectangle(bar_start, bar_start + Vector2<float>(width, -max_bar_height * ratio), glow);
+        draw_glow_rectangle(fill_min, bar_max, glow);
-        draw_filled_rectangle(bar_start, bar_start + Vector2<float>(width, -max_bar_height * ratio), color);
+        draw_filled_rectangle(fill_min, bar_max, resolve_bar_paint(color, ratio, true));
-        m_renderer->add_rectangle(bar_start - Vector2<float>(1.f, 0.f),
+        m_renderer->add_rectangle(bar_min, bar_max, outline_color);
-                                  bar_start + Vector2<float>(width, -max_bar_height), outline_color);
 
         m_text_cursor_right.x += offset + width;
 
         return *this;
     }
-    EntityOverlay& EntityOverlay::add_left_bar(const widget::Paint& color, const Color& outline_color,
+    EntityOverlay& EntityOverlay::add_left_bar(const widget::BarPaint& color, const Color& outline_color,
                                                const Color& bg_color, const float width, float ratio,
                                                const float offset, const std::optional<widget::Glow>& glow)
     {
@@ -103,12 +106,14 @@ namespace omath::hud
         const auto max_bar_height = std::abs(m_canvas.top_left_corner.y - m_canvas.bottom_right_corner.y);
 
         const auto bar_start = Vector2<float>{m_text_cursor_left.x - (offset + width), m_canvas.bottom_left_corner.y};
-        m_renderer->add_filled_rectangle(bar_start, bar_start + Vector2<float>(width, -max_bar_height), bg_color);
+        const auto bar_min = bar_start - Vector2<float>{0.f, max_bar_height};
+        const auto bar_max = bar_start + Vector2<float>{width, 0.f};
+        const auto fill_min = bar_start - Vector2<float>{0.f, max_bar_height * ratio};
+        m_renderer->add_filled_rectangle(bar_min, bar_max, bg_color);
 
-        draw_glow_rectangle(bar_start, bar_start + Vector2<float>(width, -max_bar_height * ratio), glow);
+        draw_glow_rectangle(fill_min, bar_max, glow);
-        draw_filled_rectangle(bar_start, bar_start + Vector2<float>(width, -max_bar_height * ratio), color);
+        draw_filled_rectangle(fill_min, bar_max, resolve_bar_paint(color, ratio, true));
-        m_renderer->add_rectangle(bar_start - Vector2<float>(1.f, 0.f),
+        m_renderer->add_rectangle(bar_min, bar_max, outline_color);
-                                  bar_start + Vector2<float>(width, -max_bar_height), outline_color);
 
         m_text_cursor_left.x -= offset + width;
 
@@ -134,7 +139,7 @@ namespace omath::hud
 
         return *this;
     }
-    EntityOverlay& EntityOverlay::add_top_bar(const widget::Paint& color, const Color& outline_color,
+    EntityOverlay& EntityOverlay::add_top_bar(const widget::BarPaint& color, const Color& outline_color,
                                               const Color& bg_color, const float height, float ratio,
                                               const float offset, const std::optional<widget::Glow>& glow)
     {
@@ -142,11 +147,14 @@ namespace omath::hud
         const auto max_bar_width = std::abs(m_canvas.top_left_corner.x - m_canvas.bottom_right_corner.x);
 
         const auto bar_start = Vector2<float>{m_canvas.top_left_corner.x, m_text_cursor_top.y - offset};
-        m_renderer->add_filled_rectangle(bar_start, bar_start + Vector2<float>(max_bar_width, -height), bg_color);
+        const auto bar_min = bar_start - Vector2<float>{0.f, height};
+        const auto bar_max = bar_start + Vector2<float>{max_bar_width, 0.f};
+        const auto fill_max = Vector2<float>{bar_start.x + max_bar_width * ratio, bar_start.y};
+        m_renderer->add_filled_rectangle(bar_min, bar_max, bg_color);
 
-        draw_glow_rectangle(bar_start, bar_start + Vector2<float>(max_bar_width * ratio, -height), glow);
+        draw_glow_rectangle(bar_min, fill_max, glow);
-        draw_filled_rectangle(bar_start, bar_start + Vector2<float>(max_bar_width * ratio, -height), color);
+        draw_filled_rectangle(bar_min, fill_max, resolve_bar_paint(color, ratio, false));
-        m_renderer->add_rectangle(bar_start, bar_start + Vector2<float>(max_bar_width, -height), outline_color);
+        m_renderer->add_rectangle(bar_min, bar_max, outline_color);
 
         m_text_cursor_top.y -= offset + height;
 
@@ -329,6 +337,14 @@ namespace omath::hud
         return *this;
     }
 
+    EntityOverlay& EntityOverlay::add_skeleton(const std::span<const widget::Bone> bones, const Color& color,
+                                               const float thickness)
+    {
+        for (const auto& bone : bones)
+            m_renderer->add_line(bone.start, bone.end, color, thickness);
+        return *this;
+    }
+
     void EntityOverlay::draw_dashed_line(const Vector2<float>& from, const Vector2<float>& to, const Color& color,
                                          const float dash_len, const float gap_len, const float thickness) const
     {
@@ -388,7 +404,7 @@ namespace omath::hud
             const int radius = static_cast<int>(std::ceil(std::max(glow->radius, 0.f)));
             for (int layer = radius; layer > 0; --layer)
             {
-                const float alpha = glow->color.value().w * std::clamp(glow->intensity, 0.f, 1.f)
+                const float alpha = glow->color.value().w * std::max(glow->intensity, 0.f)
                                     * (1.f - static_cast<float>(layer - 1) / static_cast<float>(radius + 1));
                 const auto value = glow->color.value();
                 const Color color{value.x, value.y, value.z, alpha / static_cast<float>(radius)};
@@ -442,7 +458,7 @@ namespace omath::hud
         {
             const float falloff = 1.f - static_cast<float>(layer - 1) / static_cast<float>(radius + 1);
             const Color color{value.x, value.y, value.z,
-                              value.w * std::clamp(glow.intensity, 0.f, 1.f) * falloff / static_cast<float>(radius)};
+                              value.w * std::max(glow.intensity, 0.f) * falloff / static_cast<float>(radius)};
             m_renderer->add_polyline(points, color, thickness + static_cast<float>(layer) * 2.f);
         }
     }
@@ -456,7 +472,7 @@ namespace omath::hud
         {
             const float falloff = 1.f - static_cast<float>(layer - 1) / static_cast<float>(radius + 1);
             const Color color{value.x, value.y, value.z,
-                              value.w * std::clamp(glow.intensity, 0.f, 1.f) * falloff / static_cast<float>(radius)};
+                              value.w * std::max(glow.intensity, 0.f) * falloff / static_cast<float>(radius)};
             m_renderer->add_line(from, to, color, thickness + static_cast<float>(layer) * 2.f);
         }
     }
@@ -476,6 +492,56 @@ namespace omath::hud
         draw_glow_polyline(points, *glow, 1.f);
     }
 
+    void EntityOverlay::draw_canvas_glow(const widget::CanvasGlow& canvas_glow) const
+    {
+        const int layers = std::max(canvas_glow.layers, 2);
+        const auto min = m_canvas.top_left_corner;
+        const auto max = m_canvas.bottom_right_corner;
+        const auto value = canvas_glow.glow.color.value();
+        const float intensity = std::max(canvas_glow.glow.intensity, 0.f);
+
+        constexpr int corner_segments = 12;
+        const float max_rounding = std::min(std::abs(max.x - min.x), std::abs(max.y - min.y)) * 0.5f;
+        const float rounding = std::clamp(canvas_glow.rounding, 0.f, max_rounding);
+        const float extent = std::max(canvas_glow.glow.radius, 0.f);
+        const float stroke = std::max(extent / static_cast<float>(layers - 1) * 2.f, 1.f);
+        for (int layer = 0; layer < layers; ++layer)
+        {
+            const float progress = static_cast<float>(layer) / static_cast<float>(layers - 1);
+            const float expansion = extent * (1.f - progress);
+            const float falloff = progress * progress * (3.f - 2.f * progress);
+            const Color color{value.x, value.y, value.z, value.w * intensity * falloff * 0.35f};
+            const auto expanded_min = min - Vector2<float>{expansion, expansion};
+            const auto expanded_max = max + Vector2<float>{expansion, expansion};
+            const float expanded_rounding = rounding + expansion;
+            const std::array corner_centers = {
+                    expanded_min + Vector2<float>{expanded_rounding, expanded_rounding},
+                    Vector2<float>{expanded_max.x - expanded_rounding, expanded_min.y + expanded_rounding},
+                    expanded_max - Vector2<float>{expanded_rounding, expanded_rounding},
+                    Vector2<float>{expanded_min.x + expanded_rounding, expanded_max.y - expanded_rounding},
+            };
+            std::array<Vector2<float>, corner_segments * 4> points;
+            for (int corner = 0; corner < 4; ++corner)
+            {
+                const float start_angle =
+                        std::numbers::pi_v<float> + static_cast<float>(corner) * std::numbers::pi_v<float> * 0.5f;
+                for (int segment = 0; segment < corner_segments; ++segment)
+                {
+                    const float arc_progress = static_cast<float>(segment) / static_cast<float>(corner_segments - 1);
+                    const float angle = start_angle + arc_progress * std::numbers::pi_v<float> * 0.5f;
+                    points[corner * corner_segments + segment] =
+                            corner_centers[corner]
+                            + Vector2<float>{std::cos(angle) * expanded_rounding, std::sin(angle) * expanded_rounding};
+                }
+            }
+            constexpr float clip_extent = std::numeric_limits<float>::max() * 0.25f;
+            m_renderer->add_polyline_clipped(points, {-clip_extent, -clip_extent}, {clip_extent, min.y}, color, stroke);
+            m_renderer->add_polyline_clipped(points, {-clip_extent, max.y}, {clip_extent, clip_extent}, color, stroke);
+            m_renderer->add_polyline_clipped(points, {-clip_extent, min.y}, {min.x, max.y}, color, stroke);
+            m_renderer->add_polyline_clipped(points, {max.x, min.y}, {clip_extent, max.y}, color, stroke);
+        }
+    }
+
     void EntityOverlay::draw_filled_rectangle(const Vector2<float>& min, const Vector2<float>& max,
                                               const widget::Paint& paint) const
     {
@@ -494,7 +560,33 @@ namespace omath::hud
                 },
                 paint);
     }
-    EntityOverlay& EntityOverlay::add_bottom_bar(const widget::Paint& color, const Color& outline_color,
+
+    widget::Paint EntityOverlay::resolve_bar_paint(const widget::BarPaint& paint, const float ratio,
+                                                   const bool vertical)
+    {
+        return std::visit(
+                widget::Overloaded{
+                        [](const Color& color) -> widget::Paint
+                        {
+                            return color;
+                        },
+                        [](const Gradient& gradient) -> widget::Paint
+                        {
+                            return gradient;
+                        },
+                        [&](const widget::BarGradient& gradient) -> widget::Paint
+                        {
+                            const float value = std::clamp(ratio, 0.f, 1.f);
+                            const auto current = Color{gradient.empty_color.value() * (1.f - value)
+                                                       + gradient.full_color.value() * value};
+                            if (vertical)
+                                return Gradient{current, current, gradient.empty_color, gradient.empty_color};
+                            return Gradient{gradient.empty_color, current, current, gradient.empty_color};
+                        },
+                },
+                paint);
+    }
+    EntityOverlay& EntityOverlay::add_bottom_bar(const widget::BarPaint& color, const Color& outline_color,
                                                  const Color& bg_color, const float height, float ratio,
                                                  const float offset, const std::optional<widget::Glow>& glow)
     {
@@ -502,10 +594,13 @@ namespace omath::hud
         const auto max_bar_width = std::abs(m_canvas.bottom_right_corner.x - m_canvas.bottom_left_corner.x);
 
         const auto bar_start = Vector2<float>{m_canvas.bottom_left_corner.x, m_text_cursor_bottom.y + offset};
-        m_renderer->add_filled_rectangle(bar_start, bar_start + Vector2<float>(max_bar_width, height), bg_color);
+        const auto bar_min = bar_start;
-        draw_glow_rectangle(bar_start, bar_start + Vector2<float>(max_bar_width * ratio, height), glow);
+        const auto bar_max = bar_start + Vector2<float>{max_bar_width, height};
-        draw_filled_rectangle(bar_start, bar_start + Vector2<float>(max_bar_width * ratio, height), color);
+        const auto fill_max = bar_start + Vector2<float>{max_bar_width * ratio, height};
-        m_renderer->add_rectangle(bar_start, bar_start + Vector2<float>(max_bar_width, height), outline_color);
+        m_renderer->add_filled_rectangle(bar_min, bar_max, bg_color);
+        draw_glow_rectangle(bar_min, fill_max, glow);
+        draw_filled_rectangle(bar_min, fill_max, resolve_bar_paint(color, ratio, false));
+        m_renderer->add_rectangle(bar_min, bar_max, outline_color);
 
         m_text_cursor_bottom.y += offset + height;
 
@@ -726,6 +821,11 @@ namespace omath::hud
                 box.fill);
     }
 
+    void EntityOverlay::dispatch(const widget::CanvasGlow& canvas_glow)
+    {
+        draw_canvas_glow(canvas_glow);
+    }
+
     void EntityOverlay::dispatch(const widget::CorneredBox& cornered_box)
     {
         if (cornered_box.glow)
@@ -756,7 +856,10 @@ namespace omath::hud
 
     void EntityOverlay::dispatch(const widget::Skeleton& skeleton)
     {
-        add_skeleton(skeleton.color, skeleton.thickness);
+        if (skeleton.bones.empty())
+            add_skeleton(skeleton.color, skeleton.thickness);
+        else
+            add_skeleton(skeleton.bones, skeleton.color, skeleton.thickness);
     }
 
     void EntityOverlay::dispatch(const widget::SnapLine& snap_line)

source/hud/renderer_realizations/imgui_renderer.cpp

@@ -27,6 +27,17 @@ namespace omath::hud
                                                     ImDrawFlags_Closed, thickness);
     }
 
+    void ImguiHudRenderer::add_polyline_clipped(const std::span<const Vector2<float>>& vertexes,
+                                                const Vector2<float>& clip_min, const Vector2<float>& clip_max,
+                                                const Color& color, const float thickness)
+    {
+        auto* draw_list = ImGui::GetBackgroundDrawList();
+        draw_list->PushClipRect(clip_min.to_im_vec2(), clip_max.to_im_vec2(), true);
+        draw_list->AddPolyline(reinterpret_cast<const ImVec2*>(vertexes.data()), static_cast<int>(vertexes.size()),
+                               color.to_im_color(), ImDrawFlags_Closed, thickness);
+        draw_list->PopClipRect();
+    }
+
     void ImguiHudRenderer::add_filled_polyline(const std::span<const Vector2<float>>& vertexes, const Color& color)
     {
         ImGui::GetBackgroundDrawList()->AddConvexPolyFilled(reinterpret_cast<const ImVec2*>(vertexes.data()),