Fix drawing bug in 3d viewer

e083dcac · Guillaume Seguin · ac13f135 · e083dcac
Commit e083dcac authored May 22, 2013 by Guillaume Seguin
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actors.py printrun/libtatlin/actors.py +1 -1

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--- a/printrun/libtatlin/actors.py
+++ b/printrun/libtatlin/actors.py
@@ -351,7 +351,7 @@ class GcodeModel(Model):

        start = self.printed_until
        end = end - start
-        if end > 0:
+        if start >= 0 and end > 0:
            glDrawArrays(GL_LINES, start, end)

        self.vertex_buffer.unbind()