diff --git a/ArchitectureColoredPainting/src/Renderer/Painting/MaterialStyleStroke.cpp b/ArchitectureColoredPainting/src/Renderer/Painting/MaterialStyleStroke.cpp
index 6f6ccd8..7834d21 100644
--- a/ArchitectureColoredPainting/src/Renderer/Painting/MaterialStyleStroke.cpp
+++ b/ArchitectureColoredPainting/src/Renderer/Painting/MaterialStyleStroke.cpp
@@ -70,6 +70,12 @@ Renderer::MaterialStyleStroke::MaterialStyleStroke(float width, StrokeType strok
 {
 }
 
+Renderer::MaterialStyleStroke::MaterialStyleStroke(const MaterialStyleStroke& s)
+	:halfWidth(s.halfWidth), strokeType(s.strokeType), endType(s.endType), materialStroke(std::make_shared<MaterialStroke>(*s.materialStroke))
+{
+
+}
+
 MaterialStyleType Renderer::MaterialStyleStroke::type() const
 {
 	return MaterialStyleType::kStroke;
diff --git a/ArchitectureColoredPainting/src/Renderer/Painting/MaterialStyleStroke.h b/ArchitectureColoredPainting/src/Renderer/Painting/MaterialStyleStroke.h
index 8262b1f..6da06ff 100644
--- a/ArchitectureColoredPainting/src/Renderer/Painting/MaterialStyleStroke.h
+++ b/ArchitectureColoredPainting/src/Renderer/Painting/MaterialStyleStroke.h
@@ -45,6 +45,7 @@ namespace Renderer
 	{
 	public:
 		MaterialStyleStroke(float width, StrokeType strokeType, StrokeEndType endType, std::shared_ptr<MaterialStroke> materialStroke);
+		MaterialStyleStroke(const MaterialStyleStroke&);
 		virtual MaterialStyleType type() const override;
 		virtual std::vector<GLfloat> encoded() const override;
 		virtual bool operator==(const MaterialStyle&) const override;