Download Untitled - Oasys Software

Oasys LS-DYNA Environment
Release Notes
Version 9.4.2
Triangular faces on 3D elements now use the correct number of nodes (3) to render the face, and
the face edges are now drawn correctly in wireframe mode when 'all edges' are being rendered.
• Case 13573
Autoscaling in D3PLOT ignored Airbag Particles, using only conventional nodes and elements. This
was deliberate because experience with 'leaky' airbags showed that when particles flew off into the
distance they could cause inappropriate scaling. scales.
However if only particles were being displayed then autoscaling would fail saying that 'nothing was
visible', and this was unsatisfactory.
Therefore the logic has been changed so that a traditional autoscale still takes place, based only on
nodes and conventional elements, but if this shows nothing then the autoscale calculation is also
performed on airbag particles if present.
This is a compromise, but it gives reasonable behaviour.
• Case 13445
When performing dynamic viewing operations on Windows platforms (only) the view could suddenly
'jump' if the following sequence of events occurred:
1. <shift>/<ctrl> + <mouse button> press started in graphics window
2. subsequent mouse motion took the mouse into a different sub-window
3. mouse button released while the mouse was still moving rapidly
This resulted in the coordinates reported at the mouse location when the button was released being
reported wrongly, and hence the view 'jumping' to something different.
Stopping the mouse movement before releasing its button, or not taking it into a different subwindow (or even, possibly, having a much faster computer) would all prevent the problem occurring.
• Case 13366
When the beam plotting mode was changed from the default 'line' display to 'true section’, giving a 3
dimensional shape to beams, the appearance of a shaded plot might not update immediately.
• Case 13246
When display of unattached nodes was switched on then they were drawn correctly but ignored
blanking, remaining on the screen even when blanked.
• Case 13057
A bug was reported that with perspective turned on and very large degrees of zoom (large increases
of scale) the screen could sometimes jump to all one colour due to foreshortening of the view
bringing the eye point 'inside' the structure.
This was due to the way zoom affected only scale, but not perspective distance - tantamount to a
photographer standing in the same place and putting a longer lens on his camera.
In Version 9.4, zooming with perspective turned on adjusts both the scale and the perspective
distance (equivalent to the photographer walking closer to the target with the same lens). It is still
possible to get the eye point 'inside' the structure using the revised method; but because the effect is
more natural, it is easier to perceive what is happening - the transition from 'outside' to 'inside'
should be easier to understand.
• Case 12533
On NVidia graphics hardware D3PLOT would sometimes pause briefly when animating a sequence,
giving a slightly jerky result. The problem could be solved by turning off the wireframe overlay.
Testing has revealed that a long unbroken sequence of 'line' primitives (which is how the overlay is
Page 67
Ove Arup & Partners Ltd
19 October 2010