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Diffstat (limited to 'demos/opengl/trackball.cpp')
| -rw-r--r-- | demos/opengl/trackball.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/demos/opengl/trackball.cpp b/demos/opengl/trackball.cpp index 83e74a649..af2f17d11 100644 --- a/demos/opengl/trackball.cpp +++ b/demos/opengl/trackball.cpp @@ -40,9 +40,9 @@ void Trackball::track(const Vector2i& point2D) float cos_angle = mLastPoint3D.dot(newPoint3D); if ( ei_abs(cos_angle) < 1.0 ) { - float angle = acos(cos_angle); + float angle = 2. * acos(cos_angle); if (mMode==Around) - mpCamera->rotateAroundTarget(Quaternionf(AngleAxisf(2.*angle, axis))); // *2 to speedup the rotation + mpCamera->rotateAroundTarget(Quaternionf(AngleAxisf(angle, axis))); else mpCamera->localRotate(Quaternionf(AngleAxisf(-angle, axis))); } |