diff -r eee644f88e93 -r 3af627f7a40f src/gl/partrenderer.h
--- a/src/gl/partrenderer.h	Sat Feb 08 00:08:57 2020 +0200
+++ b/src/gl/partrenderer.h	Thu Feb 13 12:51:27 2020 +0200
@@ -10,6 +10,7 @@
 #include "main.h"
 #include "gl/common.h"
 #include "gl/compiler.h"
+#include "gl/gridprogram.h"
 
 class PartRenderer : public QOpenGLWidget, protected QOpenGLFunctions
 {
@@ -44,6 +45,7 @@
 	glm::mat4 projectionMatrix;
 	glm::mat4 viewMatrix;
 	glm::quat modelQuaternion;
+	std::optional<GridProgram> gridProgram;
 	static constexpr double MIN_ZOOM = 0.0;
 	static constexpr double MAX_ZOOM = 3.0;
 	double zoom = 1.0;