Add ItemDrop glow

source/game/StarDrawable.hpp

@@ -14,6 +14,7 @@ struct Drawable {
   struct LinePart {
     Line2F line;
     float width;
+    Maybe<Color> endColor;
   };
 
   struct PolyPart {

source/game/StarItemDrop.cpp

@@ -265,6 +265,32 @@ bool ItemDrop::shouldDestroy() const {
 }
 
 void ItemDrop::render(RenderCallback* renderCallback) {
+  if (m_mode.get() != Mode::Taken) {
+    Color beamColor;
+    switch (m_item->rarity()) {
+    case Rarity::Uncommon:
+      beamColor = Color::rgb(87, 255, 81);
+      break;
+    case Rarity::Rare:
+      beamColor = Color::rgb(87, 220, 255);
+      break;
+    case Rarity::Legendary:
+      beamColor = Color::rgb(176, 81, 255);
+      break;
+    case Rarity::Essential:
+      beamColor = Color::rgb(255, 255, 81);
+      break;
+    default:
+      beamColor = Color::White;
+    }
+
+    beamColor.setAlphaF(0.8f);
+    auto line = Drawable::makeLine({ Vec2F(), Vec2F(0.0f, 1.5f) }, 2.0f, beamColor, position());
+    (line.linePart().endColor = beamColor)->setAlphaF(0.0f);
+    line.fullbright = true;
+    renderCallback->addDrawable(move(line), RenderLayerItemDrop);
+  }
+
   if (!m_drawables) {
     m_drawables = m_item->dropDrawables();
     if (Directives dropDirectives = m_config.getString("directives", "")) {
@@ -282,6 +308,15 @@ void ItemDrop::render(RenderCallback* renderCallback) {
   }
 }
 
+void ItemDrop::renderLightSources(RenderCallback* renderCallback) {
+  LightSource light;
+  light.pointLight = false;
+  light.color = Vec3B::filled(20);
+  light.position = position();
+  renderCallback->addLightSource(move(light));
+}
+
+
 ItemPtr ItemDrop::item() const {
   return m_item;
 }

source/game/StarItemDrop.hpp

@@ -58,7 +58,7 @@ public:
   bool shouldDestroy() const override;
 
   virtual void render(RenderCallback* renderCallback) override;
-
+  virtual void renderLightSources(RenderCallback* renderCallback) override;
   // The item that this drop contains
   ItemPtr item() const;
 

source/rendering/StarDrawablePainter.cpp

@@ -17,12 +17,16 @@ void DrawablePainter::drawDrawable(Drawable const& drawable) {
     Vec2F left = Vec2F(vnorm(line.diff())).rot90() * linePart->width / 2.0f;
     
     float fullbright = drawable.fullbright ? 0.0f : 1.0f;
-    primitives.emplace_back(std::in_place_type_t<RenderQuad>(),
+    auto& primitive = primitives.emplace_back(std::in_place_type_t<RenderQuad>(),
       line.min() + left,
       line.min() - left,
       line.max() - left,
       line.max() + left,
       color, fullbright);
+    if (auto* endColor = linePart->endColor.ptr()) {
+      RenderQuad& quad = primitive.get<RenderQuad>();
+      quad.c.color = quad.d.color = endColor->toRgba();
+    }
   } else if (auto polyPart = drawable.part.ptr<Drawable::PolyPart>()) {
     PolyF poly = polyPart->poly;
     poly.translate(drawable.position);