Linux build working again, removed the GL_Testing stuff, I'm going to move to Vulkan eventually. Got voxel search working mostly with the new octree changes. Issue with mirroring of voxel data currently

include/util.hpp

@@ -7,7 +7,7 @@
 #include <sstream>
 #include <string>
 #include <imgui/imgui.h>
-
+#include <cmath>
 
 const double PI = 3.141592653589793238463;
 const float  PI_F = 3.14159265358979f;
@@ -268,4 +268,4 @@ inline bool IsLeaf(const uint64_t descriptor) {
 	}
 
 	return false;
-}
+}