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Comparing ray/doc/notes/ReleaseNotes (file contents):
Revision 1.50 by greg, Fri Oct 1 07:45:30 2004 UTC vs.
Revision 1.93 by greg, Fri Aug 19 02:31:32 2005 UTC

# Line 1256 | Line 1256 | Added -I option to replmarks for mesh instancing.
1256   Made similar change for virtual sources to allow modifiers and aliases
1257   on the mirror and prism types to work properly.
1258  
1259 < Rob Guglielmetti dded -lw and -lh options to falsecolor to control the
1259 > Rob Guglielmetti added -lw and -lh options to falsecolor to control the
1260   legend dimensions.  Made it so -lw 0 and/or -lh 0 turns legend off.
1261  
1262   Made it so pcompos will read everything from a stream even if it doesn't
# Line 1296 | Line 1296 | Fixed a very obscure bug in rpict that caused a dark h
1296   line in certain cylindrical projections due to improper drawing
1297   of the sky dome source in rt/srcdraw.c.
1298  
1299 < Fixed problems with effective ray lenths computed for dielectric
1299 > Fixed problems with effective ray lengths computed for dielectric
1300   and BRTDfunc materials.  This was most evident in breakup of holodeck
1301   views when VDISTANCE=True.
1302  
# Line 1334 | Line 1334 | in ra_bmp.  Also provides for XYZE input conversion to
1334   Fixed what I consider a bug in pvalue -o when taking XYZE files on input,
1335   where it was inappropriately undoing the exposure value so that it always
1336   reported radiance rather than XYZ values with Y in cd/m^2.
1337 +
1338 + Made it so ra_bmp only produces run-length encoded 8-bit output for
1339 + grayscale images that are tone-mapped.  This minimizes circumstances
1340 + under which output scanline order is reversed.
1341 +
1342 + Fixed bug in rcalc where it sometimes wasn't parsing the input format
1343 + correctly.
1344 +
1345 + =====================
1346 + Version 3.7
1347 +
1348 + Fixed bug in source occluder cache which caused consistency error
1349 + for distant sources and mist materials.  (Thanks to Mark Stock for
1350 + finding the problem.)
1351 +
1352 + Fixed serious bug in source drawing routines for rpict, where the edges
1353 + of light sources were appearing through obstructions.  (Thanks to Veronica
1354 + Sundstedt for pointing this out.)
1355 +
1356 + (The above were included in the 3.6.1 patch release.)
1357 +
1358 + Changed default temporary directory from /usr/tmp, which doesn't exist
1359 + on a lot of systems these days, to /tmp.
1360 +
1361 + Eliminated many unused files and programs from the distribution, including
1362 + the following programs that were being built but no longer used:
1363 +        oki20   - printer driver for OkiMate 20 printer (B&W)
1364 +        oki20c  - printer driver for OkiMate 20 color printer
1365 +        pcwarp  - intended as more general substitute for macbetcal,
1366 +                        but never quite worked
1367 +        ra_avs  - convert to & from AVS image format
1368 +        ra_bn   - convert to & from Barneyscann format
1369 +        ra_pr   - convert to & from 8-bit Sun rasterfile format
1370 +        ra_pr24 - convert to & from 24-bit Sun rasterfile format
1371 +        thf2rad - convert GDS "things file" to Radiance scene format
1372 + If anyone is still wanting any of the above programs, let us know and we'll
1373 + reinstate it.
1374 +
1375 + Fixed bug in pcond's acuity simulation for small view angles (less than
1376 + 4 degrees horizontally or vertically).  Thanks to James Lee for figuring
1377 + this out.
1378 +
1379 + Added script to convert to/from ICT's Poskanzer Float Map, which I don't
1380 + care to support officially due to its machine-dependent byte order.
1381 +
1382 + Fixed bug that caused incorrect reporting of non-surface in set when
1383 + mixing meshes and instances.  (Thanks to Jack de Valpine for discovery.)
1384 +
1385 + Fixed inaccuracy in calculation of diffuse transmission in the presence
1386 + of pure specular (Fresnel reflection) using "trans" material.  Thanks
1387 + to Christoph Reinhart for pointing out the error.
1388 +
1389 + Made internal change to tone-mapping library to use structure pointer
1390 + rather than stack, making code re-entrant and more up to modern standards.
1391 +
1392 + Added -pd option to handle depth-of-field blur in rpict.  This requires
1393 + that the view directon (-vd option) include focal distance information,
1394 + which is now preserved by the various view file routines, and reported
1395 + by the vwright command.
1396 +
1397 + Added DBLUR variable to ranimate and pmdblur script to handle simultaneous
1398 + motion and depth-of-field blurring.  Thanks to Visarc for funding this work.
1399 +
1400 + Added setting of focus distance in rvu ("focus" command) and rholo
1401 + ('f'/"frame" command).
1402 +
1403 + Changed default remote shell in ranimate to "ssh" rather than "rsh",
1404 + which has been abandoned on most Unix systems due to security issues.
1405 +
1406 + Fixed behavior of source primitive using illum with no alternate
1407 + material.  These now become transparent so one can see the sky or
1408 + light-probe background for use in image-based lighting.  Previously,
1409 + the user needed to specify the background glow as the alternate
1410 + material for a distant illum source to behave properly.  (This still
1411 + works.)
1412 +
1413 + Fixed some minor problems and inconsistencies with 16-bit/channel
1414 + TIFF i/o in ra_tiff.
1415 +
1416 + Created mksource program to generate distant sources for improved
1417 + image-based lighting with light probes.
1418 +
1419 + Changed ambient calculation so that -ad will not limit recursion
1420 + depth, and a minimum of 27 samples will be sent out for each stored
1421 + ambient value, or 3 samples if -aa is 0 (caching off).
1422 +
1423 + Added -oM option to rtrace to report material (rather than modifier)
1424 + for cases where actual material is aliased or further up modifier chain.
1425 +
1426 + Rearranged the way ray contributions are computed so that it might be
1427 + possible to use rtrace to derive daylight coefficients and optical
1428 + transfer functions.  The new -oTW option of rtrace produces color
1429 + contribution weights for each ray, which combined with the -ti (or -tI)
1430 + option permits the contribution of selected surfaces or sources to
1431 + be determined.  Using the -oTW option, one should also specify
1432 + options "-dt 0 -aa 0 -as 0" for optimal results.  In particular,
1433 + one cannot expect reasonable tallies with -ab >= 1 and irradiance
1434 + caching on (-aa > 0).
1435 +
1436 + The same code modifications included a change to the indirect computation
1437 + with caching switched off (-aa 0).  Whereas before, the number of secondary
1438 + rays after the first bounce were half of the previous generation, they are
1439 + now determined by the surface reflectance, making for a better and faster
1440 + calculation.  It should now be possible to compute many bounces with -aa 0,
1441 + which used to be prohibitively expensive.
1442 +
1443 + Added -T option to xshowtrace to trace rays to light sources.
1444 +
1445 + Added meta2bmp program to produce BMP files from metafile graphics.
1446 +
1447 + Added cct_x(t) and cct_y(t) to src/cal/cal/blackbody.cal to interpolate
1448 + CIE chromaticities for particular black-body temperatures.
1449 +
1450 + Increased maximum number of input pictures in pcomb and pcompos to 512.
1451 +
1452 + Created rtcontrib program for computing ray contribution coefficients.
1453 + This tool may be used to do standard optical ray tracing or daylight
1454 + coefficient calculations for annual simulations, among other uses.
1455 +
1456 + Added tilde ('~') output option as part of the -o* specification of
1457 + rtrace.  This permits ray trees to be parsed more easily in binary
1458 + output mode, as needed by rtcontrib.
1459 +
1460 + Implemented Russian roulette ray termination with -lr <= 0.
1461 + Made -lr -10 the default in rtcontrib.
1462 +
1463 + Made rtcontrib -f option search RAYPATH directories.
1464 +
1465 + Made it so -o option of rtcontrib can pipe -o output to a command.
1466 +
1467 + Added -if and -of options to total for binary i/o (following rcalc mold).
1468 +
1469 + Switched default options in rtrace to use Russian roulette.  (Rpict and rvu
1470 + still use biased ray termination.)
1471 +
1472 + Added rtcontrib -r option to recover partial output.
1473 +
1474 + Added -u rendering option for pure Monte Carlo sampling.
1475 + (Got rid of -DMC compile option, which this makes superfluous.)
1476 +
1477 + Changed -t option of rlam to accept strings as well as single characters.
1478 +
1479 + Fixed bug in rcalc with -l option where it would sometimes go into an
1480 + infinite loop.
1481 +
1482 + Fixed truly ancient bug in bounding box computation for cones, which
1483 + could (and did) cause missing segments.
1484 +
1485 + Added -z option to normtiff to output LZW-compressed files.
1486 +
1487 + Last change to total causes it to produce results when it sees an empty
1488 + line on the input.  This was not intentional, but I decided I like this
1489 + behavior so I documented it rather than changing it.
1490 +
1491 + =====================
1492 + Version 3.8
1493 +
1494 + Fixed Russian roulette ray termination, which was doing the opposite of
1495 + what it should have been doing, resulting in overestimated values below
1496 + minimum ray sampling weight (serious).
1497 +
1498 + Changed mksource to use 98th percentile (rather than 99th) for threshold.
1499 +
1500 + (Above changes included in 3.7.1 patch release.)
1501 +
1502 + Eliminated writing of EXPOSURE= line in ra_tiff -r when source TIFF
1503 + does not have STONITS set.

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