make retrieving view direction numerically more stable, change orientation of bottom view

2017-11-13 21:53:10 +01:00
parent d8b2855933
commit d04fd16263
3 changed files with 4 additions and 6 deletions
--- a/src/Gui/View3DInventorViewer.cpp
+++ b/src/Gui/View3DInventorViewer.cpp
@@ -1766,10 +1766,8 @@ SbVec3f View3DInventorViewer::getViewDirection() const

    if (!cam) return SbVec3f(0,0,-1);  // this is the default

-    SbRotation camrot = cam->orientation.getValue();
-    SbVec3f lookat(0, 0, -1); // init to default view direction vector
-    camrot.multVec(lookat, lookat);
-    return lookat;
+    SbVec3f projDir = cam->getViewVolume().getProjectionDirection();
+    return projDir;
 }

 void View3DInventorViewer::setViewDirection(SbVec3f dir)