PHENIX Public Relations Event Display

Jeffery T. Mitchell and Jerome Lauret

PHENIX Computing Meeting

4/12/00

PHENIX Computing Meeting - Jeffery T. Mitchell (BNL) - 4/12/00

Old Birdseye Event Display• OpenGL-based

• Never developed fully

• Input model not matched to DSTs

PHENIX Computing Meeting - Jeffery T. Mitchell (BNL) - 4/12/00

A New PHENIX Public-Relations Display

• When first data comes, STAR will be sure to get an event display to the media.

• First impressions are important. We should be there, too.

• In offline, we don’t currently have a package that will do the job. ROOT will show events, but it isn’t that pretty.

• Kyle’s software won’t yet work on the central arm, and is unlikely to be there in time.

• So, here is another solution...

PHENIX Computing Meeting - Jeffery T. Mitchell (BNL) - 4/12/00

The Competition

PHENIX Computing Meeting - Jeffery T. Mitchell (BNL) - 4/12/00

PHENIX Computing Meeting - Jeffery T. Mitchell (BNL) - 4/12/00

PHENIX Computing Meeting - Jeffery T. Mitchell (BNL) - 4/12/00

PHENIX Computing Meeting - Jeffery T. Mitchell (BNL) - 4/12/00

Pov-Ray Based Event Display• Run the Reconstruction chain as would be done

normally.• A ROOT macro has been written to extract the

coordinate and track information from the DST files.

• The output of the ROOT macro is a Pov-Ray include file that can be processed in Pov-Ray.

• The detector geometry is hard-coded in a separate file.

• Processing time in Pov-Ray is about 2 minutes on my 450 MHz PC.

PHENIX Computing Meeting - Jeffery T. Mitchell (BNL) - 4/12/00

PHENIX Computing Meeting - Jeffery T. Mitchell (BNL) - 4/12/00

PHENIX Computing Meeting - Jeffery T. Mitchell (BNL) - 4/12/00