| 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 innacuracy in calculation of diffuse transmission in the presence |
| 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 |
|
|
| 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. |
| 1504 |
+ |
|
| 1505 |
+ |
Fixed bug in ambient calculation that caused black values for multiple |
| 1506 |
+ |
bounces in some scenes. Thanks to Mark Stock for creating and sharing |
| 1507 |
+ |
the sophisticated test scene that demonstrated this problem. |
| 1508 |
+ |
|
| 1509 |
+ |
Fixed bug in antimatter using Russian Roulette sampling. |
| 1510 |
+ |
|
| 1511 |
+ |
(Above changes included in 3.7.2 patch release 22 Aug 2005.) |
