light: intensity should be a 2d vector

It's a vector in order to provide an approximation of area lighting
without actually implementing them.

2 files changed, 10 insertions, 4 deletions

diff --git a/src/light.cpp b/src/light.cpp
index ed7c4ae1..ed9469f2 100644
--- a/src/light.cpp
+++ b/src/light.cpp
@@ -43,14 +43,19 @@ bool light::update(size_t, float) { return false; }
 bool light::is_dynamic() const { return true; }
 bool light::is_virtual() const { return true; }
 
-float light::calc_intensity(float half_dist, light_falloff falloff)
+Vector2 light::intensity(Vector2 half_dist, light_falloff falloff)
 {
     switch (falloff)
     {
     case light_falloff::linear: return 2 * half_dist;
-    case light_falloff::quadratic: return std::sqrt(2 * half_dist);
-    default: case light_falloff::constant: return 1;
+    case light_falloff::quadratic: return Vector2{std::sqrt(2 * half_dist.x()), std::sqrt(2 * half_dist.y())};
+    default: case light_falloff::constant: return Vector2{1, 1};
     }
 }
 
+Vector2 light::intensity() const
+{
+    return intensity(half_dist, falloff);
+}
+
 } // namespace floormat
diff --git a/src/light.hpp b/src/light.hpp
index 15dbc7c6..e228c8b5 100644
--- a/src/light.hpp
+++ b/src/light.hpp
@@ -37,7 +37,8 @@ struct light final : entity
     bool is_dynamic() const override;
     bool is_virtual() const override;
 
-    static float calc_intensity(float half_dist, light_falloff falloff);
+    static Vector2 intensity(Vector2  half_dist, light_falloff falloff);
+    Vector2 intensity() const;
 
     friend struct world;
 };