Fix AO values, which were inverted.

prideout · Aug 22, 2015 · 8b34794 · 8b34794
1 parent 65e173c
commit 8b34794
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/lighting.c b/src/lighting.c
@@ -225,6 +225,12 @@ heman_image* heman_lighting_compute_occlusion(heman_image* heightmap)
         horizon_scan(heightmap, result, startpts, dx, dy);
     }
 
+    // Invert the occlusion values and make sure they are valid.
+    for (int i = 0; i < width * height; i++) {
+        result->data[i] = 1.0f - result->data[i];
+        assert(result->data[i] >= 0.0 && result->data[i] <= 1.0f);
+    }
+
     free(startpts);
     return result;
 }