From 33654c7ce7c5756ab501d06c862ec10848103c72 Mon Sep 17 00:00:00 2001
From: Jonathan Westhues <jwesthues@cq.cx>
Date: Sat, 23 Aug 2008 17:32:25 -0800
Subject: [PATCH] Fix the mystery bug where the display disappears. That would
 happen when I get a mouse moved event with the middle button down before I
 got a middle button down event; orig.proj{Right,Up} were invalid.

[git-p4: depot-paths = "//depot/solvespace/": change = 1873]
---
 graphicswin.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/graphicswin.cpp b/graphicswin.cpp
index ccfbb8a..af554c0 100644
--- a/graphicswin.cpp
+++ b/graphicswin.cpp
@@ -118,6 +118,11 @@ void GraphicsWindow::Init(void) {
     projRight = Vector::From(1, 0, 0);
     projUp    = Vector::From(0, 1, 0);
 
+    // Make sure those are valid; could get a mouse move without a mouse
+    // down if someone depresses the button, then drags into our window.
+    orig.projRight = projRight;
+    orig.projUp = projUp;
+
     // And with the last group active
     activeGroup = SS.group.elem[SS.group.n-1].h;
     SS.GetGroup(activeGroup)->Activate();