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Revision 1.428 by greg, Wed Nov 15 18:02:52 2023 UTC vs.
Revision 1.457 by greg, Tue Sep 10 20:24:42 2024 UTC

# Line 2622 | Line 2622 | spectrum if used.  Unfortunately photon-mapping is cur
2622   spectral sampling is enabled, but we will fix this as soon as possible.
2623   Calculation overhead appears to be approximately 10-15% for RGB
2624   renderings compared to version 5.4a.
2625 +
2626 + Added spectral rendering to rvu as well, and made -cs and -cw
2627 + options standard across the rendering library.  I also brought
2628 + mkillum, ranimove, rsensor, and mksource into the fold.  These
2629 + tools were broken in the initial release.  (Hopefully, they are
2630 + working now, but none have been tested as yet.)
2631 + There was also an indexing bug in the spectral->RGB conversions
2632 + that made reds into blues and vice versa, which has been fixed.
2633 +
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.  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.
2676 +
2677 + Added handling of spectral images to rcode2bmp script.
2678 +
2679 + Minor change to rcollate to allow explicit byte records to
2680 + be any specified length without checks against header input.
2681 +
2682 + Added new hemisphere type to rfluxmtx, "h=cie" for CIE sky
2683 + scanner positions.  These are 145 patches with identical
2684 + row counts to Tregenza, but starting from a different
2685 + azimuth and reversing row directions at adjacent altitudes.
2686 +
2687 + Added optimization for long argument lists and arrays in
2688 + the calcomp routines used for rendering and in rcalc, etc.
2689 +
2690 + Added error estimate spreading to ambient super-sampling
2691 + algorithm (-as) to improve performance especially in
2692 + scenes with sharp cut-offs.
2693 +
2694 + Added -i option to gendaymtx to match -i option of gendaylit.
2695 + Thanks to Yongqing for initial implementation.
2696 +
2697 + Changed rcrop so negative #rows or #cols counts back from end.
2698 +
2699 + Added rcomb -n option for multi-processing of very large matrices.
2700 +
2701 + Made it so rsplit and rlam can handle any number of input files
2702 + up to active open file descriptor limit.
2703 +
2704 + Taoning Wang added genssky tool for generating spectral sky
2705 + descriptions.
2706 +
2707 + Taoning added gensdaymtx utility based on gendaymtx, and
2708 + added epw2wea -a option to include required information.
2709 +
2710 + Fixed bug introduced in Auguest 2022 (5.4 release) in distant
2711 + light source sampling, which caused aiming failures.  (Thanks
2712 + to Mike DiPompeo of LightStanza for reporting the issue.)
2713 +
2714 + Added rxpict rendering tool based on C++ RpictSimulManager class.
2715 + Multi-processing and spectral output are supported.
2716 +
2717 + Added crude ability to read and convert spectra to RGB in ximage,
2718 + ra_bmp, and ra_rgbe programs.  Also updated fast tone-mapping
2719 + library to handle spectral HSR inputs at the same time.

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