Posted by ag123 on Mar 12, 2017; 7:44pm
URL: https://forum.jogamp.org/java3d-jogamp-and-an-stl-viewer-tp4037771p4037772.html

in case the maintainers or any one is trying / testing out the stl viewer app
i noted that some models/objects 'freezes' while others seemed ok, initially i suspected it may be related to file size, however it turns out that this is not necessary true

i tried loading this 'Curro Expo 92 cookie cutter' model by lolo_aguirre from thingverse
http://www.thingiverse.com/thing:2171286/#files

the file CURRO_INTERIOR.STL which is about 1mb renders just fine and one can pan / rotate around the model to view it


while a smaller file CURRO_EXTERIOR.STL which is about 500k freezes
(in the same link above)

the scene graph in java3d is setup as follows

SimpleUniverse > Locale > Branch group (this is the root) > Transform group (scale) > Branch group > Shape3D (this is the model - all triangles from the STL file is loaded in this node)

there are various bounding spheres and lights (with spherical bounds), i'm not too sure if that is after all the cause of the freezes, do drop a tip / comment

the source can be checked out from github https://github.com/ag88/stl-viewer if one wants to examine the codes. codes that deal with java3d are mainly in org.stlviewer.PCanvas3D and org.stlviewer.PModel (PModel is the BranchGroup > Shape representing the STL model/object it also loads the triangles when the file is loaded)

thanks in advance