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-rw-r--r--src/wolff_potts.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/wolff_potts.cpp b/src/wolff_potts.cpp
index 5de7f9c..e3259e4 100644
--- a/src/wolff_potts.cpp
+++ b/src/wolff_potts.cpp
@@ -121,6 +121,7 @@ int main(int argc, char *argv[]) {
} else {
// a more complex example: measure the average magnetization, and draw the spin configuration to the screen
+#ifdef HAVE_GLUT
// initialize glut
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
@@ -141,6 +142,7 @@ int main(int argc, char *argv[]) {
}
glFlush();
};
+#endif
}
// run wolff for N cluster flips