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Revision 1.433 by greg, Mon Nov 27 22:04:45 2023 UTC vs.
Revision 1.493 by greg, Fri Jun 27 19:38:13 2025 UTC

# Line 2634 | Line 2634 | that made reds into blues and vice versa, which has be
2634   Added i/o for spectral pictures to rmtxop, the first program that can
2635   ingest them.  (Only rtrace, rcontrib, and rfluxmtx can render them.)
2636   New symbolic rmtxop -c options, such as RGB, XYZ, S (for scotopic)
2637 < and M (for melanopic) make color conversions simpler.
2638 < Also added spectral picture support to rcrop and radcompare.
2637 > and M (for melanopic) make color conversions simpler.  Alternatively,
2638 > a reference matrix or picture may be given and the color space of
2639 > that file will be used.  The -C option takes either a symbolic
2640 > color space or reference file and is "sticky," so it applies to
2641 > all subsequent input files that do not have their own -c right ahead
2642 > of them.
2643 >
2644 > Added spectral picture support to rcrop and radcompare.
2645 >
2646 > Added new utility, rcomb, which is something like a combination
2647 > of rmtxop and pcomb, it works with all the inputs and
2648 > outputs that rmtxop handles, but allows for general expressions
2649 > like those in pcomb for putting matrices together, working on
2650 > an element at a time.  (No resizing of matrices or accessing
2651 > neighboring elements, as permitted in pcomb.)  It saves memory
2652 > over rmtxop by operating on a row at a time, so can handle
2653 > input and output matrices with any number of rows.  It does
2654 > provide for a single matrix-multiplication operation at the end,
2655 > which only requires memory for that final matrix.
2656 >
2657 > Added support for filtering hyperspectral images to pfilt.
2658 >
2659 > Added support for 1- and 3-component float matrix i/o to
2660 > pcomb to allow for better interoperability.
2661 >
2662 > Added support for -co+ option to rtpict, so it can directly
2663 > produce hyperspectral images.
2664 >
2665 > Added new "specdata" and "specpict" primitives to support
2666 > interpolated spectral data files and hyperspectral images
2667 > as patterns.
2668 >
2669 > Added support for multispectal sampling in rsensor, which will
2670 > put out as many color channels as specified in any -cs option
2671 > (default is 3 for RGB).
2672 >
2673 > Added ability of mgf2rad to convert spectral data at least
2674 > for light, glow, plastic, and metal primitive types.  Need
2675 > to use new '-s' option to get new output.  Added support for
2676 > new WGMDfunc type as well, which is considerably more flexible
2677 > at supporting different spectral components.
2678 >
2679 > Added handling of spectral pictures (HSR) to rcode2bmp script.
2680 >
2681 > Minor change to rcollate to allow explicit byte records to
2682 > be any specified length without checks against header input.
2683 >
2684 > Added new hemisphere type to rfluxmtx, "h=cie" for CIE sky
2685 > scanner positions.  These are 145 patches with identical
2686 > row counts to Tregenza, but starting from a different
2687 > azimuth and reversing row directions at adjacent altitudes.
2688 >
2689 > Added optimization for long argument lists and arrays in
2690 > the calcomp routines used for rendering and in rcalc, etc.
2691 >
2692 > Added error estimate spreading to ambient super-sampling
2693 > algorithm (-as) to improve performance especially in
2694 > scenes with sharp cut-offs.
2695 >
2696 > Added -i option to gendaymtx to match -i option of gendaylit.
2697 > Thanks to Yongqing for initial implementation.
2698 >
2699 > Changed rcrop so negative #rows or #cols counts back from end.
2700 >
2701 > Added rcomb -n option for multi-processing of very large matrices.
2702 >
2703 > Made it so rsplit and rlam can handle any number of input files
2704 > up to active open file descriptor limit.
2705 >
2706 > Taoning Wang added genssky tool for generating spectral sky
2707 > descriptions.
2708 >
2709 > Taoning added gensdaymtx utility based on gendaymtx, and
2710 > added epw2wea -a option to include required information.
2711 >
2712 > Fixed bug introduced in Auguest 2022 (5.4 release) in distant
2713 > light source sampling, which caused aiming failures.  (Thanks
2714 > to Mike DiPompeo of LightStanza for reporting the issue.)
2715 >
2716 > Added rxpict rendering tool based on C++ RpictSimulManager class.
2717 > Multi-processing and spectral output are supported.
2718 >
2719 > Wrote rxpiece tool that will render pictures using tiling and
2720 > can handle different output formats and hyperspectral pictures.
2721 > Only runs on a single machine, however -- no NFS locking on
2722 > shared volumes.  Mainly a demonstration tool for RpictSimulManager
2723 > C++ class, but later added to standard Rmakefile targets.
2724 >
2725 > Fixed a bug in BSDF sampling of sources pointed out by
2726 > David Geisler-Moroder, which tended to overestimate specular
2727 > contributions for some BSDFs.
2728 >
2729 > Added crude ability to read and convert spectra to RGB in ximage,
2730 > ra_bmp, ra_ps, and ra_rgbe programs.  Also updated fast tone-mapping
2731 > library to handle spectral HSR inputs at the same time.  HSR
2732 > input handling was added in a similar fashion to pcond and pvalue
2733 > for convenience.
2734 >
2735 > Added handling of hyperspectral images to normtiff, a handy program
2736 > for quickly tone-mapping Radiance RGBE, XYZE, and now hyperspectral
2737 > pictures, as well as IEEE float or LogLuv TIFFs.
2738 >
2739 > Added handling of hyperspectral pictures to pextrem, though
2740 > results are still reported in RGB.
2741 >
2742 > Added accurate conversion of hyperspectral pictures to ra_xyze.
2743 >
2744 > Added hyperspectral picture conversion to ra_tiff, with accurate
2745 > color when targeting 16-bit/comp., LogLuv, and float output,
2746 > and the approximate method for 24-bit RGB.
2747 >
2748 > Taoning added genssky -L option to specify global and diffuse
2749 > illuminance values for output calibration.
2750 >
2751 > Created C++ class for rcontrib and example tool rxcontrib, which
2752 > is an optional compile in the src/rt directory.  The output
2753 > model is more general in some respects and the operations more
2754 > efficient, but standard output is not supported, nor is ASCII
2755 > results data.
2756 >
2757 > Added strnstr.c compatibility module in ray/src/common, since
2758 > it isn't present on Linux derivatives.
2759 >
2760 > Added WGMDfunc material type with programmable roughness and
2761 > separate modifier paths for the different components.
2762 >
2763 > Added gensurf -i option at the request of Peter Apian-Bennewitz
2764 > to reverse surface normals, mostly for data input, when it is
2765 > a bit more difficult to adjust.
2766 >
2767 > Added rad -N option to rholo call for multiprocessing when
2768 > mkillum and/or mkpmap are involved in octree prep.
2769 >
2770 > Added ability of gendaymtx to read EPW as well as WEA files.
2771 > When EPW input is provided, the 3-hour average dew point is
2772 > used to compute a more accurate precipitable water content
2773 > value.  It currently does not use these data directly from
2774 > the EPW input, relying instead on a dew-point-to-W calculation.
2775 > This follows the request and recommendations of David G-M.
2776 >
2777 > Removed limitation in rfluxmtx, which was disallowing distant
2778 > and local receivers. Found this to be a perfectly valid approach
2779 > for some annual daylighting scenarios.
2780 >
2781 > Wrote new pvsum tool to handle cases dctimestep can't, like
2782 > spectral input pictures.  It also adds a -N option for multi-
2783 > processing on Unix machines, which utilizes memory-mapped
2784 > inputs for efficient i/o sharing.
2785 >
2786 > Made it so genBSDF can use spectral rendering for a
2787 > more accurate photometric result.
2788 >
2789 > Changed default matrix representation to float rather than
2790 > double, which uses less RAM and supports faster operations
2791 > in general.  Build with compiler flag:
2792 >        -DDTnativeDTrmx_native=DTdouble
2793 > to get back higher precision representation.
2794 >
2795 > Taoning Wang updated genssky and gensdaymtx to provide illuminance
2796 > calibration and accept EPW files directly as input.
2797 >
2798 > Added -e expr and -f file.cal options to all rendering tools, not
2799 > just rcontrib/rxcontrib.  Feature request from Peter A-B.
2800 >
2801 > Fixed slight bias in indirect calculation caused by ambient
2802 > collision detection, pointed out by Jon Sargent.  New code
2803 > keeps track of rejected samples and sells them back to
2804 > later calls to get something closer to a true Poisson
2805 > sampling method.
2806 >
2807 > Altered rvu "origin" command to take shift amounts forward,
2808 > right, and up rather than taking an explicit origin, which
2809 > can be done easily enough with the "view" command.  Peter A-B
2810 > requested (sort of).
2811 >
2812 > Added genglaze tool created by Taoning Wang to generate
2813 > spectral glazing materials based on CGDB data and models.
2814 >
2815 > Fixed bug that caused inf and nan errors with -cw setting
2816 > where longer wavelength was substantially less than limits
2817 > of specified spectra.
2818 >
2819 > Created bsdfpeaks utility to identify and report full-width,
2820 > half-maximum sizes of peaks in SIR and XML inputs.
2821 >
2822 > Changed default super-sampling in bsdf2ttree from 256 to 64,
2823 > since there doesn't seem to be much benefit to the higher
2824 > sampling rate for most BSDFs.
2825 >
2826 > Fixed problem with "mirror" primitive, which was not permitting
2827 > indirect rays to transmit through alternate material type.
2828 > Thanks to Jon Sargent for finding problem and help resolving it.
2829 >
2830 > Added experimental C++ based rxpiece tool to default installation
2831 > in makeall/Rmakefile.
2832 >
2833 > Added rcomb -mt option to transpose concatenation matrix.

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