inverse square falloff but I'm cheating

float3 · Apr 2, 2024 · 0757472 · 0757472
1 parent 0abc72b
commit 0757472
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Showing 6 changed files with 10 additions and 3 deletions.
diff --git a/renders/checkered_floor.png b/renders/checkered_floor.png
diff --git a/renders/cornell_box.png b/renders/cornell_box.png
diff --git a/renders/mirror_ball.png b/renders/mirror_ball.png
diff --git a/renders/scene.png b/renders/scene.png
diff --git a/src/scene/mod.rs b/src/scene/mod.rs
@@ -104,9 +104,16 @@ impl Scene {
                 return Vec3::new([0.0, 0.0, 0.0]);
             }
         }
-        // let falloff = 1.0 / (distance_to_light * distance_to_light);
-        // light.color().scale(falloff)
-        light.color()
+        let constant_term = 1.0; // Prevents division by zero at very close distances
+        let linear_term = 0.1; // Linear falloff factor
+        let quadratic_term = 0.01; // Quadratic falloff factor (original inverse square law)
+
+        let falloff = 1.0
+            / (constant_term
+                + linear_term * distance_to_light
+                + quadratic_term * distance_to_light * distance_to_light);
+
+        light.color().scale(falloff)
     }
 
     pub fn from_toml(toml: &Value) -> Self {

diff --git a/tests/sample_test.png b/tests/sample_test.png