Problem 1974

Summary: Apparent invisibility of elliptical cone from some angles.
Product: Geant4 Reporter: John.Allison
Component: geometry/solidsAssignee: Evgueni.Tcherniaev
Status: RESOLVED FIXED    
Severity: minor    
Priority: P4    
Version: 10.3   
Hardware: Apple   
OS: Mac OS X   
Attachments: Macro defining a suitable viewpoint.
jpeg created by Ray Tracer.
Slightly zoomed jpeg from Ray Tracer.

Description John.Allison 2017-05-12 17:11:01 CEST
Created attachment 454 [details]
Macro defining a suitable viewpoint.

With test202:
/vis/open RayTracerX
/vis/drawVolume e-cone-phys
/control/execute e-cone-phys.g4view  # attached
/vis/viewer/flush

The front face of the cone is speckled (see attached jpegs).
Comment 1 John.Allison 2017-05-12 17:12:46 CEST
Created attachment 455 [details]
jpeg created by Ray Tracer.

Notice the speckled nature of the front face.
Comment 2 John.Allison 2017-05-12 17:14:24 CEST
Created attachment 456 [details]
Slightly zoomed jpeg from Ray Tracer.

Slightly zoomed image.  Speckles easy to see.
Comment 3 Evgueni.Tcherniaev 2017-07-21 12:18:19 CEST
The problem has been fixed by re-implementing SurfaceNormal(). Fixed G4EllipticalCone will be available in the next release.