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1.1 |
=========================
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Version 1.2 (Released 3/9/90)
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Added a -p option to rpict and pfilt to set the pixel aspect ratio for
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output. Instead of giving the absolute x and y resolutions, the user
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now gives rpict and pfilt the maximum desired resolution for x and y
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and the pixel aspect ratio is used along with the given view to
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calculate appropriate values within this boundary. This makes for
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much more natural view specifications. For example, for a 512x400
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device with a pixel aspect ratio of 1.0, the pfilt command:
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pfilt -x 512 -y 400 -p 1
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will always produce the appropriate output, regardless of the aspect
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ratio of the input picture. If necessary, the x or y output resolution
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will be reduced to accommodate the device's resolution. A square image
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would occupy a region of 400x400 pixels.
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View shift and lift options were added to the list of standard view
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parameters, for specifying views for panoramas and holograms.
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Rview no longer takes options for x and y resolution, but instead
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gets them from the device driver along with the pixel ratio. This
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makes it much easier to change the view aspect ratio (with the vh
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and vv parameters).
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A -z option was added to rpict to write out the distances for each
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pixel in an image. This may be useful for z-buffer operations, and
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is used by the new program pinterp, described below.
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A program called pinterp was added to the burgeoning list of
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picture filters and converters. This program is designed primarily
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to interpolate animated frames for walk-throughs of static scenes,
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but it has a number of other useful functions besides. It takes as
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its input one or more rendered pictures (with their corresponding z
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value files) and desired viewpoint (hopefully not too far afield from
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the given images). Pinterp then takes the input frames and moves the
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pixels to their new computed location. Filling operations make sure
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that the final image does not have large unpainted regions.
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Added smoothing option to gensurf, using bilinear Phong surface normal
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interpolation. Not perfect, but it's better than nothing and permits
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the use of fewer polygons to represent smoothly curved surfaces.
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=========================
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Version 1.3 (Released 10/22/90)
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Added conversion utility for IES (Illuminating Engineering Society) standard
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format luminaire data. The translator, called ies2rad, takes any number
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of luminaire data files and creates the necessary Radiance geometric
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descriptions and data files and puts them in the specified library location.
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A new data format was added to accommodate irregularly-spaced data points.
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Added rview driver for NeWS for Sun and Silicon Graphics workstations.
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This work was done by Isaac Kwo.
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Fixed oconv for scenes with many overlapping instances (runs faster now).
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Added consitency checks intended to detect stale octrees without restricting
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changes to surface modifiers. (But you still can't change total number of
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objects). Stale octrees caused some of the strangest behavior...
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Finally broke down and wrote my own malloc(3) routines. There is a
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CalTech module floating around Berkeley that caused a lot of trouble
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for bmalloc(), resulting in about twice the needed memory use.
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Added translator for Architrion. Arch2rad uses mapping rules to assign
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materials to surfaces from input file. This is a general method (dreamed
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up by Charles Ehrlich) that allows users to assign materials based on
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whatever information is available from the CAD file. See the accompanying
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description file on translators in the ray/doc/notes directory.
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Added fisheye view types to rpict and rview, useful for looking at
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entire scenes and for LEEP virtual reality wide field stereo viewer.
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Wrote xshowtrace, a fun program for watching rays as they are being
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traced on an X11 display.
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Write ra_pr24 for converting between 24-bit Sun rasterfiles and
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Radiance pictures. Perhaps this should be incorporated in ra_pr, as
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ra_t8 and ra_t16 should be one program, but the algorithms and memory
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requirements are totally different for colormapped images.
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Added routines for performing 24-bit gamma correction in integer domain,
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making programs like ra_pr24 and ra_t16 run faster.
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=========================
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Version 1.4 (Released early 1991?)
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Fixed bug in IES translator that resulted in the incorrect
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interpretation of type B photometric data. (1.3.1)
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| 92 |
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Added types for using BRDF data: plasfunc, metfunc, plasdata and metdata.
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Added interpretation of source color to ies2rad and color corrective
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filtering to pfilt. Reference file used by both is "lamp.tab" in
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library directory.
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Added picture flipping program, pflip, and pattern preprocessing script,
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normpat.csh, to the px directory.
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Fixed bug in ra_pr24 that caused the reversal of red and blue values.
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New version accepts both RT_STANDARD and RT_FORMAT_RGB files but
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produces only RT_STANDARD rasterfiles as output.
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Added -m option to xform to change modifiers for surfaces.
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Wrote replmarks program to replace markers in a Radiance scene file
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for light sources or other objects.
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Added global compilation script, makeall.
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Fixed calculation of luminance in display programs and gensky to use
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white light assumption.
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Added options and features to pcomb.
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Added FORMAT= line to all Radiance file headers for improved error
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checking and clarity.
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| 121 |
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Added icon bitmaps for rview and x11image under X11 and fixed a bug
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that caused x11image to ignore keyboard input.
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****** COMPATIBILITY CHANGE ********
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Added constant definitions to cal files using ':' instead of '='.
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This makes for faster calculations since many more constant
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expressions can be reduced at "compile" time.
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Created glare calculation programs in util directory. Findglare locates
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glare sources, xglaresrc circles sources on a displayed image, and
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glarendx computes various glare indices.
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=========================
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Version 2.0 (Released 11/26/91)
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Added -i option to renderers for computing irradiance rather than
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radiance. Eliminated redundant -oI option from rtrace and added
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-I option to replace old -oi. This hack ignores glass and similar
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surfaces during the calculation.
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| 141 |
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Changed icon for x11image (renamed ximage) to miniature bitmap of
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picture.
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Fixed bug in xshowtrace that prevented it from working with twm.
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Added memory recovery feature to rview so that when it refines
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itself out of memory it doesn't quit but instead gives the user
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a command line saying "out of memory:", which allows the output to
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| 149 |
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be written and so forth before quitting or restarting the image.
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Added -g (gamma correction) option to pvalue.
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Added the more general BRTDfunc for procedural definition of bidirectional
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reflectance-transmittance distribution functions. Also added transfunc
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and transdata types.
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Changed trans types to modify the color of the transmitted specular
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component.
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| 160 |
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Fixed a bug in ra_t16 introduced in the last change which caused
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problems for the (default) 16-bit output mode.
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Improved Monte Carlo sampling for penumbras (-dj) and ambient
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super-samples (-as) using stratified random number sequence introduced
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by Christophe Schlick at '91 Eurographics workshop on rendering.
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Wrote falsecolor program to transform images to false color with
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value labels.
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Modified pcomb to allow different output sizes and access to local
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pixel neighborhood for specialty filtering applications.
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Made cone and sphere routines more forgiving of negative radii,
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switching between inverted types as necessary and giving warning
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messages instead of bombing. Cones with equal radii are now
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silently converted into cylinders. Hopefully, these changes will
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make writing Radiance scene file translators a little bit easier.
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Unfortunately, we still bomb for zero-sized cones and spheres.
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Wrote a program called getbbox that just computes the bounding box
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for a set of Radiance scene files. It is basically a modified version
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of oconv that doesn't store objects in memory and doesn't care about
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undefined modifiers.
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Added -a and -l options to pcompos and made both pcompos and pcomb
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read from commands as well as files.
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Substantially improved the accuracy and appearance of the interreflection
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calculation by computing gradients at the same time as primary values and
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then using a first order interpolation scheme. This affects the information
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stored in ambient files, so old files will have to be thrown away.
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Added secondary light sources from planar mirror, prismatic and
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holographic surfaces. This created the new options -dr (direct relays)
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and -dp (direct presample density) to the renderers. The document
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secsrc.note describes this feature in greater detail.
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Put many of the routines into a common library.
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Wrote a replacement for makedist, called mkillum, which generates
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light distribtuions and illum descriptions for windows, skylights,
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etc. in a much more natural and automatic fashion.
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| 204 |
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Fixed long-standing bug in text routines which caused slanted text
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to slant the wrong way!
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| 207 |
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Added -e option to ra_bn, ra_pr, ra_pr24, ra_t8 and ra_t16 programs
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for faster and more convenient image conversion w/o using pfilt.
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****** COMPATIBILITY CHANGE ********
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Finally added contexts to calcomp routines so identical names in
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different function files no longer conflict. Loading of function
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| 213 |
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files also works automatically without those nasty "key" variables.
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New context marks (backquote characters) appear in some local variables
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defined in some of the cal files. This is inconsistent with older
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versions, and must be changed back to and underscore or some other legal
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character if these files are used by 1.4 and earlier.
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Wrote ra_tiff program, using Sam Leffler's libtiff package to read
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and write 24-bit TIFF images.
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Wrote ra_ppm program to convert to and from Poskanzer Pixmaps.
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****** COMPATIBILITY CHANGE ********
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Changed run-length encoding of Radiance pictures to gain better
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compression. Routines can still read old format, but new ra_rgbe
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program must be used to write convert images to a more generic format
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that can be read by release 1.4 and earlier.
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| 230 |
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Defined U and V parameters in rayinit.cal for more convenient (and
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sloppy) use of 2-dimensional textures and patterns on planar surfaces.
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| 233 |
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Beefed up lampcolor program to compute spectral radiance for diffuse
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emitters. This was a previously a pain in the butt and a serious
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source of error for scenes not modeled using IES data files.
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| 237 |
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Added version reporting to rpict, rtrace and rview. Use standalone
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-version option.
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| 240 |
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Changed to quincunx initial sampling pattern in rpict. This should
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| 241 |
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reduce artifacts from adaptive image sampling at no added cost.
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| 243 |
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Added -rgb option to ra_pr24 to produce RT_FORMAT_RGB files.
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| 245 |
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Added -ds option to renderers to make source sampling more accurate
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| 246 |
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for large area sources. It is no longer necessary or recommended
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| 247 |
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to break large sources (such as windows) into smaller pieces with
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| 248 |
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gensurf unless their output distribution changes over their surface.
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| 249 |
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Also, cylinders can now be used as light sources, provided they are not
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too short compared to their radius (causing them to be frequently missed).
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| 252 |
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Added -I option to xform to invert surfaces.
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| 253 |
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| 254 |
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Added SMLFLT and BIGMEM defines to better control the sizes of data
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structures during compilation. Made their setting relatively
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| 256 |
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straightforward in makeall and created a separate rmake program to
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| 257 |
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hold the options generated by makeall.
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| 259 |
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Made the programs more forgiving of machine differences on octrees.
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| 261 |
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****** COMPATIBILITY CHANGE ********
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| 262 |
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Fixed incorrect conversion factor between radiance and luminance.
|
| 263 |
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The correct luminous efficacy value is now defined in color.h as
|
| 264 |
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WHTEFFICACY. It was 470 lumens/watt previously, now it has been
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| 265 |
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corrected to 179 lumens/watt. This affects the absolute values
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| 266 |
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in the output of programs like gensky and ies2rad. Thus, these
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| 267 |
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programs should be rerun to generate corrected files for this
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| 268 |
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version of Radiance. Also, the new versions of display programs
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| 269 |
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like ximage will give different values with the 'l' command on
|
| 270 |
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an image generated with 1.4 and previous releases. The following
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| 271 |
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alias may be used to fix the radiance values in a picture generated
|
| 272 |
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using previous versions of gensky and ies2rad:
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| 274 |
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alias pfixabs '( echo EXPOSURE=.381 ; cat \!:1 ) > \!:1.$$ ; mv \!:1.$$ \!:1'
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| 275 |
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|
| 276 |
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Improved accuracy of glass material type and added option for
|
| 277 |
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user-supplied index of refraction.
|
| 278 |
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|
| 279 |
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Added sgi to rt/Makefile and px/Makefile SPECIAL category for compiling
|
| 280 |
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Isaac Kwo's NeWS driver for rview and the glimage program by Jim Winget.
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| 281 |
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Also fixed various compile problems for the SGI.
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| 282 |
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| 283 |
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Improved handling of alternate scanline orientations. The programs
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| 284 |
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pflip and protate (used to be prot) now affect the scanline ordering
|
| 285 |
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of the file without messing up the view parameters for programs like
|
| 286 |
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pinterp and findglare.
|
| 287 |
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| 288 |
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==========================
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| 289 |
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Version 2.1 (Released 5/20/92)
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| 291 |
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****** COMPATIBILITY CHANGE ********
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| 292 |
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Changed function specifications to allow the use of expressions as
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| 293 |
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well as variables in scene files. Use of this feature may result
|
| 294 |
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in some loss of backwards compatibility as older software does not
|
| 295 |
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support it.
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| 296 |
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|
| 297 |
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Added makeall option for NeXT machine and changed code to suit.
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| 298 |
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| 299 |
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****** COMPATIBILITY CHANGE ********
|
| 300 |
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Added off-specular sampling and anisotropic materials plastic2,
|
| 301 |
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metal2 and trans2. The old options -sp, -sj, -st and -p have
|
| 302 |
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been renamed to -ps, -pj, -pt and -pa, respectively. New options
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| 303 |
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-sj and -st have been introduced.
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| 304 |
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| 305 |
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Improved ray intersection calculations using -DSMLFLT option by
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| 306 |
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increasing epsilon used in tests. This eliminates most of the
|
| 307 |
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errors that occured when this compile option was used in version 2.0.
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| 308 |
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| 309 |
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Added capability to gensurf to read height or point data from a
|
| 310 |
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file. This makes it more convenient to make (optionally smoothed)
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| 311 |
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landscapes from recorded measurements and the like.
|
| 312 |
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| 313 |
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Corrected irradiance gradient calculation. New formula predicts
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| 314 |
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gradient better and thus reduces artifacts in indirect calculation.
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| 316 |
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Modified replmarks to accept multiple markers.
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| 318 |
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Added -aI and -aE options to read ambient include/exclude materials
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| 319 |
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from a file.
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| 321 |
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Reduced effect of light leaks during interreflection calculation.
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| 322 |
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| 323 |
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Added -ang option to gensky for giving solar angles explicitly.
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| 324 |
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| 325 |
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Added ability of "view" command within rview to accept view options.
|
| 326 |
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| 327 |
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Fixed a long-standing bug in gensky that caused it to report
|
| 328 |
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inaccurate values for the ground ambient level. Since the dayfact
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|
|
script uses this value in calculating its results, version 2.0 will
|
| 330 |
|
|
be in error (by as much as 30 or 40%).
|
| 331 |
|
|
|
| 332 |
|
|
Fixed a bug in the reflectance normalization for isotropic and
|
| 333 |
|
|
anisotropic Gaussian highlights that caused too much light to
|
| 334 |
|
|
be reflected near grazing angles. Much thanks to the folks at
|
| 335 |
|
|
Ohio State University (Steve Spencer and Kevin Simon) who
|
| 336 |
|
|
pointed this out to me!
|
| 337 |
|
|
|
| 338 |
|
|
Fixed bug in xshowtrace introduced in 2.0. It absolutely didn't work
|
| 339 |
|
|
after my most recent changes to image.c. (Sorry about that!)
|
| 340 |
|
|
|
| 341 |
|
|
Finally fixed shortcoming of view reading routines so they can get
|
| 342 |
|
|
the views from pictures created with absolute program paths
|
| 343 |
|
|
(eg. /usr/local/bin/rpict). This affects programs like
|
| 344 |
|
|
xshowtrace and glare, as well as the recover option of rpict.
|
| 345 |
|
|
|
| 346 |
|
|
Fixed isotropic Gaussian distribution (highlights for types "metal"
|
| 347 |
|
|
and "plastic") to make them more accurate and bring them into line
|
| 348 |
|
|
with the new anisotropic Gaussian models ("metal2" and "plastic2").
|
| 349 |
|
|
This may affect the appearance of some hightlights.
|
| 350 |
|
|
|
| 351 |
|
|
Added -H and -R options to pvalue to control resolution strings
|
| 352 |
|
|
and color ordering.
|
| 353 |
|
|
|
| 354 |
|
|
Fixed byte ordering for 24-bit color displays in ximage.
|
| 355 |
|
|
|
| 356 |
|
|
==========================
|
| 357 |
|
|
Version 2.2 (No official release)
|
| 358 |
|
|
|
| 359 |
|
|
Made more fixes in rview and ximage for different display hardware.
|
| 360 |
|
|
Philip Thompson and Peter Apian helped with suggestions and testing.
|
| 361 |
|
|
|
| 362 |
|
|
Fixed bug in -e option of xform that kept it from fully expanding
|
| 363 |
|
|
some scene files.
|
| 364 |
|
|
|
| 365 |
|
|
Added proportional text spacing (-s option for psign, new argument
|
| 366 |
|
|
for text primitives). Added antialiasing (3x3 super-sampling) to psign.
|
| 367 |
|
|
|
| 368 |
|
|
Added code in display drivers to read environment variable called
|
| 369 |
|
|
"GAMMA" to set gamma correction for different monitors. See notes in
|
| 370 |
|
|
this directory on gamma_corr.
|
| 371 |
|
|
|
| 372 |
|
|
Added CC defines to all the Rmakefiles so that other C compilers may be
|
| 373 |
|
|
used consistently.
|
| 374 |
|
|
|
| 375 |
|
|
Added -x and -y options to psign to control output dimensions directly.
|
| 376 |
|
|
|
| 377 |
|
|
Decreased value of FTINY with SMLFLT option once again in an attempt to
|
| 378 |
|
|
further reduce errors.
|
| 379 |
|
|
|
| 380 |
|
|
Reinstated rtrace's capability to produce 32-bit_rle_rgbe directly.
|
| 381 |
|
|
|
| 382 |
|
|
Added -S and -o options to rpict for more flexible production of
|
| 383 |
|
|
multiple images and slave operation. Rpict will also accept a recover
|
| 384 |
|
|
file name the same as the output file for more convenient recovery.
|
| 385 |
|
|
|
| 386 |
|
|
Added ra_ps program to translate Radiance picture into PostScript file.
|
| 387 |
|
|
|
| 388 |
|
|
****** COMPATIBILITY CHANGE ********
|
| 389 |
|
|
Made ambient files machine-independent so they can be conveniently moved
|
| 390 |
|
|
and reused on any system. Also added coordinated reads and writes so
|
| 391 |
|
|
that multiple processes may use the same ambient file at the same time.
|
| 392 |
|
|
Along with the -S option of rpict, this should greatly facilitate parallel
|
| 393 |
|
|
rendering. The new ambient file format also contains a header that
|
| 394 |
|
|
can be read by getinfo. Lookamb now has a -h option.
|
| 395 |
|
|
|
| 396 |
|
|
Created rpiece program for parallel rendering of a single image on
|
| 397 |
|
|
multiple processors and workstations.
|
| 398 |
|
|
|
| 399 |
|
|
Eliminated star artifacts in mkillum distribution patterns by improving
|
| 400 |
|
|
data interpolation method. Improved ability of mkillum to correctly
|
| 401 |
|
|
sample non-axis-aligned polygons.
|
| 402 |
|
|
|
| 403 |
|
|
Added -s and -o options to pcompos for slightly more convenient use
|
| 404 |
|
|
of the -a option. Also eliminated incompatibility between -a and -y
|
| 405 |
|
|
options.
|
| 406 |
|
|
|
| 407 |
|
|
Fixed bug in spotlight sources that caused incorrect boundaries to be
|
| 408 |
|
|
cast by mirrors.
|
| 409 |
|
|
|
| 410 |
|
|
Fixed rounding of scanlines in ra_pr24 to 16-bit boundaries.
|
| 411 |
|
|
|
| 412 |
|
|
Added @file and $envar expansion capabilities to rtrace, rpict and
|
| 413 |
|
|
rview. This is primarily to overcome the 128-byte command limit of
|
| 414 |
|
|
MS-DOS.
|
| 415 |
|
|
|
| 416 |
|
|
Added -r option to gensky for the direct specification of solar
|
| 417 |
|
|
brightness.
|
| 418 |
|
|
|
| 419 |
|
|
Added -oN option to rtrace for reporting unperturbed surface normals,
|
| 420 |
|
|
and changed -on to report perturbed surface normals (used to be
|
| 421 |
|
|
unperturbed).
|
| 422 |
|
|
|
| 423 |
|
|
Changed -di switch of rtrace, rpict and rview to -dv and changed
|
| 424 |
|
|
sense. Thus, instead of having a boolean variable called "source
|
| 425 |
|
|
invisibility" that is normally off, there is now a boolean variable
|
| 426 |
|
|
called "source visibility" that is normally on. More logical, and
|
| 427 |
|
|
also allows for the addition of -di and -de options for direct
|
| 428 |
|
|
include and exclude in the future.
|
| 429 |
|
|
|
| 430 |
|
|
Fixed bug in image.c associated with -DSMLFLT that caused angular
|
| 431 |
|
|
fisheye views to repeat the center pixel in the middle of an image.
|
| 432 |
|
|
|
| 433 |
|
|
Modified colordata and colorpict to take functions of a single variable
|
| 434 |
|
|
instead of always requiring functions of three variables (red, green, blue).
|
| 435 |
|
|
|
| 436 |
|
|
Modified objview script to work in original object coordinates.
|
| 437 |
|
|
|
| 438 |
|
|
Added -P and -PP options to rpict and rtrace for persistent and parallel
|
| 439 |
|
|
processing, respectively. The -P option is most useful with the -fr
|
| 440 |
|
|
option of pinterp, since rtrace doesn't have to be restarted for every
|
| 441 |
|
|
frame in a long animation sequence. The -PP option is most useful when
|
| 442 |
|
|
running rpiece on a multiprocessing platform, to get acceptable memory
|
| 443 |
|
|
sharing without the hassle of threaded code.
|
| 444 |
|
|
|
| 445 |
|
|
Changed signal handling in rpict so CONT is now used to elicit
|
| 446 |
|
|
asynchronous progress reports. ALRM now causes rpict to die
|
| 447 |
|
|
unconditionally.
|
| 448 |
|
|
|
| 449 |
|
|
Created executive program called "rad" to run oconv, rview, rpict and
|
| 450 |
|
|
pfilt automatically. This should greatly simplify use of Radiance and
|
| 451 |
|
|
reduce the problems associated with poorly chosen parameter values.
|
| 452 |
|
|
|
| 453 |
|
|
Added slave driver to rview to make it easier to run from other
|
| 454 |
|
|
graphics applications. (Thanks to Chris Nicholas of Sun for the
|
| 455 |
|
|
suggestion.)
|
| 456 |
|
|
|
| 457 |
|
|
Fixed error in ies2rad.c and source.cal that caused incorrect
|
| 458 |
|
|
interpretation of asymmetric Type C (A) fixture photometry. Note the
|
| 459 |
|
|
new definition of src_phi in source.cal. This change may affect
|
| 460 |
|
|
manually entered photometry.
|
| 461 |
|
|
|
| 462 |
|
|
Added '@' command to ximage to adjust exposure based on Blackwell's
|
| 463 |
|
|
model of human contrast sensitivity.
|
| 464 |
|
|
|
| 465 |
|
|
Added functions to pcomb to get the ray origin and direction from the
|
| 466 |
|
|
input picture view specifications.
|
| 467 |
|
|
|
| 468 |
|
|
Removed Fresnel approximation to specular reflection from Radiance materials,
|
| 469 |
|
|
since the direct component was not being computed correctly. This
|
| 470 |
|
|
may have a slight affect on the appearance of surfaces, but it can't be
|
| 471 |
|
|
helped.
|
| 472 |
|
|
|
| 473 |
|
|
****** COMPATIBILITY CHANGE ********
|
| 474 |
|
|
Changed the definition of the BRTDfunc type so as to be more general and to
|
| 475 |
|
|
allow for different reflection properties depending on what side of the
|
| 476 |
|
|
surface the ray is incident. Any scene and function files using the
|
| 477 |
|
|
old definition of BRTDfunc must be updated. Implemented the approximation
|
| 478 |
|
|
used in Window 4 to reflection from coated glazings in lib/glazing.cal.
|
| 479 |
|
|
|
| 480 |
|
|
Added -ti, -te, -tI and -tE options to rtrace for including or
|
| 481 |
|
|
excluding surfaces from those reported by the trace output specifier.
|
| 482 |
|
|
|
| 483 |
|
|
Fixed long-standing bug in pfilt gaussian filter option, which caused
|
| 484 |
|
|
the image to be excessively defocused.
|
| 485 |
|
|
|
| 486 |
|
|
Added -m option to pfilt for image sample smoothing. This helps get rid
|
| 487 |
|
|
of some of the "speckle" associated with specular sampling.
|
| 488 |
|
|
|
| 489 |
|
|
Made -ovt* compatible with -I option of rtrace.
|
| 490 |
|
|
|
| 491 |
|
|
Changed ximage to work with multiple pictures. It now opens one window
|
| 492 |
|
|
for each picture file.
|
| 493 |
|
|
|
| 494 |
|
|
Fixed error reporting in rpict for most machines. (Many thanks to Peter
|
| 495 |
|
|
Apian-Bennewitz for his help and suggestions.)
|
| 496 |
|
|
|
| 497 |
|
|
****** COMPATIBILITY CHANGE ********
|
| 498 |
|
|
Added intermediate sky to gensky and changed its options slightly.
|
| 499 |
|
|
The new gensky uses a new version of skybright.cal, so any old
|
| 500 |
|
|
gensky output in files must be recomputed with the new gensky before
|
| 501 |
|
|
it will work. (A "skybright: undefined" error should clue you in.)
|
| 502 |
|
|
|
| 503 |
|
|
==========================
|
| 504 |
|
|
Version 2.3 (Released 11/16/93)
|
| 505 |
|
|
|
| 506 |
|
|
No changes from the above, but the official release was designated 2.3
|
| 507 |
|
|
to avoid confusion with previous beta releases of 2.2.
|
| 508 |
|
|
|
| 509 |
|
|
==========================
|
| 510 |
|
|
Version 2.4 (Released 4/20/94)
|
| 511 |
|
|
|
| 512 |
|
|
Philip Thompson of MIT added use of a radiance.gamma resource to ximage
|
| 513 |
|
|
and we added it to the x11 driver of rview as well. This is an alternative
|
| 514 |
|
|
to setting the GAMMA environment variable for X11 servers.
|
| 515 |
|
|
|
| 516 |
|
|
Added MLIB variable to Rmakefile's for defining alternate math libraries.
|
| 517 |
|
|
I discovered that the default version of sqrt() under IRIX is a whole
|
| 518 |
|
|
lot slower than what's in the libfastm.a library, and not much better.
|
| 519 |
|
|
This can make a significant difference to the renderers, since sqrt()
|
| 520 |
|
|
is relied on quite a bit, and it's assumed to be fast.
|
| 521 |
|
|
|
| 522 |
|
|
Added =SS option to pcompos to allow anchor points for image positions
|
| 523 |
|
|
other than the lower left corner.
|
| 524 |
|
|
|
| 525 |
|
|
Wrote raddepend script for finding dependencies in scene files.
|
| 526 |
|
|
|
| 527 |
|
|
Fixed a bug in mkillum that caused it to incorrectly sample ring sources.
|
| 528 |
|
|
|
| 529 |
|
|
Finally allowed mixtures to work with materials, thanks to the encouragement
|
| 530 |
|
|
and advice of Peter Apian-Bennewitz.
|
| 531 |
|
|
|
| 532 |
|
|
Wrote a triangular mesh converter, called tmesh2rad. I defined my own
|
| 533 |
|
|
format, since I wasn't too familiar with anyone else's format and I
|
| 534 |
|
|
wanted to support some additional possibilities (most notably patterns).
|
| 535 |
|
|
|
| 536 |
|
|
Added initial "#?RADIANCE" line to headers to simplify Radiance file
|
| 537 |
|
|
identification by programs used to magic numbers.
|
| 538 |
|
|
|
| 539 |
|
|
Created a translator for Wavefront .obj files, called obj2rad. It uses
|
| 540 |
|
|
the same type of mapping rules as arch2rad.
|
| 541 |
|
|
|
| 542 |
|
|
=============================
|
| 543 |
|
|
Version 2.5 (Released 6/26/95)
|
| 544 |
|
|
|
| 545 |
|
|
Wrote translators to and from the new MGF (Materials and Geometry
|
| 546 |
|
|
Format) specification.
|
| 547 |
|
|
|
| 548 |
|
|
Changed color conversion routines to make light source colors (from
|
| 549 |
|
|
lamp.tab) consistent with uniform white light standard.
|
| 550 |
|
|
|
| 551 |
|
|
Fixed a bug that caused very small local sources not to be sampled
|
| 552 |
|
|
at all!
|
| 553 |
|
|
|
| 554 |
|
|
Added the ability for rview to read commands from its standard input
|
| 555 |
|
|
under X11.
|
| 556 |
|
|
|
| 557 |
|
|
****************** COMPATIBILITY CHANGE ***********************
|
| 558 |
|
|
Changed GAMMA environment variable to DISPLAY_GAMMA, to bring it in
|
| 559 |
|
|
line with the xli program, so users don't have to give two variables
|
| 560 |
|
|
for the same value!
|
| 561 |
|
|
|
| 562 |
|
|
Added -t (touch) option to rad, to make it easier to deal with minor
|
| 563 |
|
|
changes to input files.
|
| 564 |
|
|
|
| 565 |
|
|
Created graphical user interface to rad, called trad. Based on Tcl/Tk,
|
| 566 |
|
|
this should finally get people to start using this program!
|
| 567 |
|
|
|
| 568 |
|
|
Added -vo and -va (view fore and view aft) clipping plane options to
|
| 569 |
|
|
Radiance view parameters.
|
| 570 |
|
|
|
| 571 |
|
|
Added -bv option for (opaque) back face visibility control.
|
| 572 |
|
|
|
| 573 |
|
|
Added -q, -a and -e options to pinterp, and made it faster. (These
|
| 574 |
|
|
should be big improvements.)
|
| 575 |
|
|
|
| 576 |
|
|
Created tabfunc program for converting data tables to functional
|
| 577 |
|
|
language.
|
| 578 |
|
|
|
| 579 |
|
|
Wrote mgf2meta program to convert MGF data to line drawing.
|
| 580 |
|
|
|
| 581 |
|
|
Updated ies2rad program to interpret MGF geometry in IESNA-LM-63-1995
|
| 582 |
|
|
files.
|
| 583 |
|
|
|
| 584 |
|
|
Added sorting of ambient values according to access times to improve
|
| 585 |
|
|
reference locality for better virtual memory performance.
|
| 586 |
|
|
|
| 587 |
|
|
Added source solid angle argument to BRTD functions for averaging
|
| 588 |
|
|
values.
|
| 589 |
|
|
|
| 590 |
|
|
Wrote genclock program to create an analog clock.
|
| 591 |
|
|
|
| 592 |
|
|
Fixed a bug for bitmaps using hexbit4x1.fnt with brighttext, which
|
| 593 |
|
|
caused thin lines to appear.
|
| 594 |
|
|
|
| 595 |
|
|
=============================
|
| 596 |
|
|
Version 3.0 (Released 6/19/96)
|
| 597 |
|
|
|
| 598 |
|
|
Added comments to data and font files.
|
| 599 |
|
|
|
| 600 |
|
|
Changed behavior of mirror to allow void alternate material.
|
| 601 |
|
|
|
| 602 |
|
|
Added cylindrical view type for Quicktime VR authoring and other
|
| 603 |
|
|
interesting applications.
|
| 604 |
|
|
|
| 605 |
|
|
Increased default rtrace parameters for more accurate calculations when
|
| 606 |
|
|
options are not specified.
|
| 607 |
|
|
|
| 608 |
|
|
Added RAWFILE and ZFILE variables to rad for saving raw picture file and
|
| 609 |
|
|
Z (distance) information from rpict.
|
| 610 |
|
|
|
| 611 |
|
|
Ported trad for newer (4.0) version of Tk (wish). Thanks to Bob Lipman
|
| 612 |
|
|
of NIST for helping me track down the changes.
|
| 613 |
|
|
|
| 614 |
|
|
Added -B option to pinterp to blur multiple views into a single image,
|
| 615 |
|
|
useful for motion blur and depth of field simulation.
|
| 616 |
|
|
|
| 617 |
|
|
Created pdfblur script and modified vwright to automate depth-of-field
|
| 618 |
|
|
simulation with pinterp.
|
| 619 |
|
|
|
| 620 |
|
|
Added -c option for color PostScript output from ra_ps, and made both
|
| 621 |
|
|
this program and psmeta produce EPS-compatible files.
|
| 622 |
|
|
|
| 623 |
|
|
Created macbethcal program for calibrating color image scanners and
|
| 624 |
|
|
film recorders or printers using the Macbeth ColorChecker chart.
|
| 625 |
|
|
|
| 626 |
|
|
Created ra_xyze program for converting to and from new Radiance CIE XYZE
|
| 627 |
|
|
picture type and calibrating monitor colors. Modified Radiance picture
|
| 628 |
|
|
filters (pcompos, pflip, pcomb, pinterp, protate and pfilt) to handle
|
| 629 |
|
|
new picture type without complaint.
|
| 630 |
|
|
|
| 631 |
|
|
Added automatic ambient value computation to improve accuracy of results
|
| 632 |
|
|
no matter what -av value is given. (Only works for -ab > 0.) This was
|
| 633 |
|
|
a fairly obvious optomization I should have thought of ages ago.
|
| 634 |
|
|
(Default is old behavior -- -aw option puts in new code.)
|
| 635 |
|
|
|
| 636 |
|
|
Modified interreflection calculation to take textures (surface normal
|
| 637 |
|
|
perturbations) into account in indirect illumination. This should
|
| 638 |
|
|
improve the accuracy and appearance of textured surfaces in shadowed
|
| 639 |
|
|
regions.
|
| 640 |
|
|
|
| 641 |
|
|
Added -T option to rpiece to limit execution time.
|
| 642 |
|
|
|
| 643 |
|
|
Fixed bug in mixtext type introduced in last release -- caused improper
|
| 644 |
|
|
calculation of mixed modifiers.
|
| 645 |
|
|
|
| 646 |
|
|
Added basic options and functionality for participating media. New material
|
| 647 |
|
|
type "mist" and rendering options -me, -ma, -mg and -ms. This should permit
|
| 648 |
|
|
the modeling of visible light beams, uniform smoke, fog, and some types
|
| 649 |
|
|
of clouds.
|
| 650 |
|
|
|
| 651 |
|
|
Added -o option to ximage to control output of 't' command (and
|
| 652 |
|
|
middle mouse button). This adds the ability to produce pixel
|
| 653 |
|
|
position, radiance value and luminance. The default action is
|
| 654 |
|
|
the same as before.
|
| 655 |
|
|
|
| 656 |
|
|
Created pmblur script to generate views for camera motion blur in
|
| 657 |
|
|
walk-through animations.
|
| 658 |
|
|
|
| 659 |
|
|
Added "inpic" variable to picture.cal for determining when the edge
|
| 660 |
|
|
of a non-repeating image has been reached. Use with mixfunc primitive.
|
| 661 |
|
|
|
| 662 |
|
|
Created ranimate program to control walk-through and dynamic animations
|
| 663 |
|
|
on multiple hosts.
|
| 664 |
|
|
|
| 665 |
|
|
Fixed problem with antimatter type referring to final definition of
|
| 666 |
|
|
material names. Now, it uses the most recent ones.
|
| 667 |
|
|
|
| 668 |
|
|
Added an MC macro for true Monte Carlo sampling rather than the default
|
| 669 |
|
|
Quasi Monte Carlo. To enable, add -DMC to the OPT= line in rmake.
|
| 670 |
|
|
|
| 671 |
|
|
Fixed bug in pfilt -m option that caused floating point exceptions on
|
| 672 |
|
|
Alphas.
|
| 673 |
|
|
|
| 674 |
|
|
Wrote xyzimage script for X11 display of XYZE and corrected RGBE pictures.
|
| 675 |
|
|
Takes the same options as ximage with an added -p option, and checks
|
| 676 |
|
|
the environment variable DISPLAY_PRIMARIES for setting of monitor
|
| 677 |
|
|
primaries. (See the ra_xyze manual page for further explanation.)
|
| 678 |
|
|
|
| 679 |
|
|
Made colorpict's use much less memory by storing data in RGBE format
|
| 680 |
|
|
rather than floating point (takes 1/3 the space). This should help with
|
| 681 |
|
|
large image patterns.
|
| 682 |
|
|
|
| 683 |
|
|
At the insistence of Henrik Wann Jensen, changed the specular sampling
|
| 684 |
|
|
code so that very rough specular surfaces will sample more truly,
|
| 685 |
|
|
eliminating some strange mirror appearances evident using the old
|
| 686 |
|
|
method.
|
| 687 |
|
|
|
| 688 |
|
|
Added drawing of small and skinny light sources so rpict won't miss
|
| 689 |
|
|
these from inadequate image sampling. The method used may not work
|
| 690 |
|
|
perfectly for warped views (-vta, -vth and -vtc) having long,
|
| 691 |
|
|
cylindrical light sources. (Rob Shakespeare, take note!)
|
| 692 |
|
|
|
| 693 |
|
|
Added corner rounding to genprism command (-r option).
|
| 694 |
|
|
|
| 695 |
|
|
Changed mixtures so that mixing material with void is allowed, allowing
|
| 696 |
|
|
for opacity maps. Also altered general behavior so that surfaces
|
| 697 |
|
|
without materials in their modifier list are invisible, not only
|
| 698 |
|
|
surfaces with void modifiers.
|
| 699 |
|
|
|
| 700 |
|
|
****************** COMPATIBILITY CHANGE ***********************
|
| 701 |
|
|
The behavior of xform has been changed to make object library
|
| 702 |
|
|
organization and usage simpler.
|
| 703 |
|
|
1) The RAYPATH directories are searched for matching file names.
|
| 704 |
|
|
2) Filenames beginning with '.', '/' or '~' do not result in searches.
|
| 705 |
|
|
3) Xform performs a chdir to the found file's directory, obviating
|
| 706 |
|
|
the need for peculiar inclusion names in subdirectories.
|
| 707 |
|
|
4) The array option (-a) now works when xform reads from stdin.
|
| 708 |
|
|
5) The expand option (-e) is now the default -- -c gets
|
| 709 |
|
|
back old behavior.
|
| 710 |
|
|
|
| 711 |
|
|
=============================
|
| 712 |
|
|
Version 3.1 (Released 7/24/97)
|
| 713 |
|
|
|
| 714 |
|
|
Changed gensky so it will accept hour specifications as HH:MM, with
|
| 715 |
|
|
designations for standard North American and European time zones.
|
| 716 |
|
|
|
| 717 |
|
|
Increased buffer size for in-line commands from 512 to 1024.
|
| 718 |
|
|
|
| 719 |
|
|
Added T(n), S(n), WE and pa(n) functions and constants to pcomb.
|
| 720 |
|
|
|
| 721 |
|
|
Created histo utility to compute 1-dimensional histograms from data files.
|
| 722 |
|
|
|
| 723 |
|
|
Created pacuity, pveil and psquish scripts (later combined in "pcond"):
|
| 724 |
|
|
|
| 725 |
|
|
o The pacuity program takes a Radiance picture and defocuses it
|
| 726 |
|
|
in places where the human eye loses resolution. Unless the
|
| 727 |
|
|
scene contains very low luminances (below .1 cd/m^2 or so),
|
| 728 |
|
|
this will not have an appreciable effect. The output can then
|
| 729 |
|
|
be adjusted according to the Ferwerda, Pattanaik and Shirley
|
| 730 |
|
|
tone mapping function using pcomb with the file
|
| 731 |
|
|
src/cal/cal/ferwerda.cal. (See the header comments therein.)
|
| 732 |
|
|
|
| 733 |
|
|
o The pveil program finds sources of glare in an image and adds
|
| 734 |
|
|
a corresponding amount of background luminance surrounding each
|
| 735 |
|
|
glare source according to the adaptation response of the human
|
| 736 |
|
|
eye. This has the effect of reducing contrast around glare
|
| 737 |
|
|
sources.
|
| 738 |
|
|
|
| 739 |
|
|
o The psquish program is probably the most useful of the three,
|
| 740 |
|
|
and must be applied after the other two if the others are
|
| 741 |
|
|
used. With the -a option, psquish uses the human visual
|
| 742 |
|
|
response to compress the dynamic range of an image to fit within
|
| 743 |
|
|
the limited dynamic range of a display (assumed to go from 1 to
|
| 744 |
|
|
100 cd/m^2), and also reduces color visibility in pictures with
|
| 745 |
|
|
low light levels (below 1 cd/m^2). Without the -a option,
|
| 746 |
|
|
psquish simply does the best it can to fit a picture's dynamic
|
| 747 |
|
|
range into what can be readily displayed, without regard to
|
| 748 |
|
|
human visual response. This has the effect of making problem
|
| 749 |
|
|
scenes viewable, such as indoor scenes with windows looking out
|
| 750 |
|
|
to bright exteriors.
|
| 751 |
|
|
|
| 752 |
|
|
Created pcond program, which combines pacuity, pveil and psquish in a
|
| 753 |
|
|
more efficient, robust package. (See man page for details.)
|
| 754 |
|
|
|
| 755 |
|
|
Renamed Perlin noise function partial functions, noise3a(), noise3b()
|
| 756 |
|
|
and noise3c() to noise3x(), noise3y() and noise3z(). Added backward
|
| 757 |
|
|
compatibility defines to rayinit.cal so nothing should be broken.
|
| 758 |
|
|
|
| 759 |
|
|
Fixed double-counting bug in calculation of specular transmission of
|
| 760 |
|
|
light sources for trans type. This might have caused unrealistically
|
| 761 |
|
|
high estimates for illumination beneath trans surfaces with non-zero
|
| 762 |
|
|
roughnesses when the interreflection calculation was used (-ab 1).
|
| 763 |
|
|
|
| 764 |
|
|
Added routines for reading and writing separate RGB files in pvalue.
|
| 765 |
|
|
Also added -pP (where P is one of 'R', 'G' or 'B' upper or lower case)
|
| 766 |
|
|
and -s option to skip specified number of bytes on header. Finally,
|
| 767 |
|
|
added a -n option for non-interleaved RGB input and output.
|
| 768 |
|
|
|
| 769 |
|
|
Fixed obscure bug in rcalc that caused it to return "Bad call to
|
| 770 |
|
|
argument!" for certain combinations of function and output channel
|
| 771 |
|
|
definitions.
|
| 772 |
|
|
|
| 773 |
|
|
Added "-e auto" and "-e human" options to ximage(1) and corresponding
|
| 774 |
|
|
'a' and 'h' commands to perform dynamic range compression similar to
|
| 775 |
|
|
pcond(1).
|
| 776 |
|
|
|
| 777 |
|
|
==============================
|
| 778 |
|
|
Version 3.4 (Released 1/28/02)
|
| 779 |
|
|
|
| 780 |
|
|
Fixed bug in rpiece that caused it to incorrectly compute -vs and -vl
|
| 781 |
|
|
(view shift and lift) offsets. (Included in 3.1.1.)
|
| 782 |
|
|
|
| 783 |
|
|
Fixed bug in xform handling mist's with > 5 real arguments.
|
| 784 |
|
|
(Included in 3.1.1.)
|
| 785 |
|
|
|
| 786 |
|
|
Fixed bug in mist handling routines that caused some incorrect calculations
|
| 787 |
|
|
for distant sources. (Included in 3.1.1.)
|
| 788 |
|
|
|
| 789 |
|
|
Added ability for lam utility to read from commands.
|
| 790 |
|
|
|
| 791 |
|
|
Created vwrays command to compute ray origins and directions for specified
|
| 792 |
|
|
views or pictures.
|
| 793 |
|
|
|
| 794 |
|
|
Changed rtrace behavior to send bogus record when ray direction is zero.
|
| 795 |
|
|
(Before, it only flushed values with no corresponding record.) This
|
| 796 |
|
|
change was needed to facilitate its use with the new vwrays program.
|
| 797 |
|
|
|
| 798 |
|
|
Modified ies2rad so that it no longer produces glow sources for the sides
|
| 799 |
|
|
of objects, which caused unnatural dark bands near the ceilings of
|
| 800 |
|
|
direct/indirect installations. (Included in 3.1.4.)
|
| 801 |
|
|
|
| 802 |
|
|
Fixed bug in rpiece that caused the -pa option to fail. (Included in 3.1.2.)
|
| 803 |
|
|
|
| 804 |
|
|
Made ximage emphasize pixels in the selected region for the 'a' and 'h'
|
| 805 |
|
|
commands to adjust the exposure using histogram compression.
|
| 806 |
|
|
(Included in 3.1.4.)
|
| 807 |
|
|
|
| 808 |
|
|
Fixed bug in trad which caused it to fail when there were tabs in the input.
|
| 809 |
|
|
(Included in 3.1.3.)
|
| 810 |
|
|
|
| 811 |
|
|
Fixed bug in pcond that caused it to white-out borders of some fisheye views.
|
| 812 |
|
|
(Included in 3.1.3.)
|
