--- ray/doc/man/man1/rcontrib.1 2020/03/14 16:25:46 1.17 +++ ray/doc/man/man1/rcontrib.1 2020/09/10 17:52:46 1.19 @@ -1,4 +1,4 @@ -.\" RCSid "$Id: rcontrib.1,v 1.17 2020/03/14 16:25:46 greg Exp $" +.\" RCSid "$Id: rcontrib.1,v 1.19 2020/09/10 17:52:46 greg Exp $" .TH RCONTRIB 1 5/25/05 RADIANCE .SH NAME rcontrib - compute contribution coefficients in a RADIANCE scene @@ -9,6 +9,8 @@ rcontrib - compute contribution coefficients in a RADI ][ .B \-V ][ +.B "\-t secs" +][ .B "\-c count" ][ .B \-fo @@ -118,6 +120,26 @@ a parallel source such as the sun to a diffuse surface Note that output flushing via zero-direction rays is disabled with .I \-c set to zero. +.PP +Output flushing at fixed intervals may be enabled with the +.I \-x +option, which specifies the number of records +(-c accumulations) before each flush. +If the +.I \-y +option is also set, then periodic flushing is disabled and the +output size for an RGB image is the taken from the x and y dimensions. +In lieu of periodic flushing, a flush may be forced as mentioned above +by sending a sample with a zero direction vector, although you +must still send a full record of rays before output occurs. +.PP +If progress reports are desired, the +.I \-t +option specifies a time interval in seconds for reports sent to +standard error. +This requires that the number of input samples is known, meaning a +.I \-y +parameter has been specified. .PP The output of .I rcontrib