Problem 1974 - Apparent invisibility of elliptical cone from some angles.
Summary: Apparent invisibility of elliptical cone from some angles.
Status: RESOLVED FIXED
Alias: None
Product: Geant4
Classification: Unclassified
Component: geometry/solids (show other problems)
Version: 10.3
Hardware: Apple Mac OS X
: P4 minor
Assignee: Evgueni.Tcherniaev
URL:
Depends on:
Blocks:
 
Reported: 2017-05-12 17:11 CEST by John.Allison
Modified: 2017-07-21 12:18 CEST (History)
0 users

See Also:

Attachments
Macro defining a suitable viewpoint. (1.37 KB, text/plain)
2017-05-12 17:11 CEST, John.Allison 		Details
jpeg created by Ray Tracer. (26.96 KB, image/jpeg)
2017-05-12 17:12 CEST, John.Allison 		Details
Slightly zoomed jpeg from Ray Tracer. (48.13 KB, image/jpeg)
2017-05-12 17:14 CEST, John.Allison 		Details
Add an attachment (proposed patch, testcase, etc.)

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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.