Added missing includes (GCC11.1 without PCH).

src/libslic3r/Fill/FillBase.hpp

@@ -13,10 +13,10 @@
 #include "../BoundingBox.hpp"
 #include "../Exception.hpp"
 #include "../Utils.hpp"
+#include "../ExPolygon.hpp"
 
 namespace Slic3r {
 
-class ExPolygon;
 class Surface;
 enum InfillPattern : int;
 

src/libslic3r/Fill/FillLightning.cpp

@@ -2,6 +2,7 @@
 
 #include "FillLightning.hpp"
 #include "Lightning/Generator.hpp"
+#include "../Surface.hpp"
 
 #include <cstdlib>
 #include <cmath>

src/libslic3r/Fill/Lightning/DistanceField.cpp

@@ -3,6 +3,7 @@
 
 #include "DistanceField.hpp" //Class we're implementing.
 #include "../FillRectilinear.hpp"
+#include "../../ClipperUtils.hpp"
 
 namespace Slic3r::FillLightning
 {

src/libslic3r/Fill/Lightning/DistanceField.hpp

@@ -4,6 +4,9 @@
 #ifndef LIGHTNING_DISTANCE_FIELD_H
 #define LIGHTNING_DISTANCE_FIELD_H
 
+#include "../../Point.hpp"
+#include "../../Polygon.hpp"
+
 namespace Slic3r::FillLightning
 {
 

src/libslic3r/Fill/Lightning/Layer.hpp

@@ -11,6 +11,7 @@
 #include <vector>
 #include <list>
 #include <unordered_map>
+#include <optional>
 
 namespace Slic3r::FillLightning
 {

src/libslic3r/Fill/Lightning/TreeNode.cpp

@@ -4,6 +4,7 @@
 #include "TreeNode.hpp"
 
 #include "../../Geometry.hpp"
+#include "../../ClipperUtils.hpp"
 
 namespace Slic3r::FillLightning {