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Here is a list of compile switches, used to customize Radiance code |
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for specific machines and users: |
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-DMC If set, switches from default low-discrepency sequence |
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sampling to true (pseudorandom) Monte Carlo. Use if |
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the "brushed" appearance of specular highlights and |
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penumbras bothers you. |
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-DALIGN=(type) Alignment type, machine-dependent. Most RISC |
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-DALIGNT=(type) Alignment type, machine-dependent. Most RISC |
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architectures align on 8-word boundaries (double). |
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The default alignment type is int. |
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-DSPEED=(MIPS) Millions of instructions per second for this |
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processor (approximate). This is used to decide |
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certain unimportant timing issues such as how many |
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rays to trace before checking input in rvu and |
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whether or not to optimize the color table in ximage |
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on 8-bit displays. |
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-DWFLUSH=(rays) Override for number of rays before flush in rvu. |
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-DBSD Operating system has a strong Berkeley flavor, meaning |
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that bcopy() and bzero() are present but maybe memcpy() |
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and memset() are not. (See common/standard.h for other |
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things this flag affects.) Also affects certain system |
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calls, such as signal handling and resource tracking. |
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-DBSD Operating system has a strong Berkeley flavor, which |
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affects certain system calls, such as signal handling and |
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resource tracking. |
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-DSMLMEM The system has little RAM available, so size hash |
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tables and the like accordingly. Only allows for |
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Values greater than 20 use over 4 Kbytes per |
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light source, which can add up to a lot of |
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memory in scenes with many sources. |
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-DAVGREFL=R Set the average surface reflectance for the purpose |
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of indirect irradiance calculations to R, where |
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R is a real number in the range (0,1.0). The |
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default value is 0.50 (50%). |
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-DPMAP_OOC Builds the out-of-core photon map. The photon data resides |
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in a leaf file on disk with suffix ".leaf" and is loaded on |
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demand. This is intended for very large photon maps (up to |
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4.3 billion photons) particularly for annual simulations |
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with rcontrib. This switch is disabled by default, which |
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builds the in-core photon map used in previous releases; |
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this resides entirely in main memory. These options are |
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mutually exclusive, and the resulting photon map files are |
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incompatible. |
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-DPMAP_PRIMARYPOS |
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Stores photon primary hitpoints for binning using the -f |
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option with rcontrib if the function file requires them. |
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This consumes an additional 3 floats and is disabled per |
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default to reduce the size of the resulting photon maps. |
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-DPMAP_FLOAT_FLUX |
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Stores photon flux as floats instead of more compact RGBE |
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(the default). In terms of accuracy, the difference would |
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only be noticeable with highly saturated colours. |
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-DPMAP_ROI Enables the -api option to mkpmap. This constrains photon |
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deposition only to the specified region of interest (defined |
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as a bounding volume) for situations where it is known a |
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priori that photon map lookups will only occur inside this |
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region. This is disabled per default as it can lead to |
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biased results outside the ROI, or near its boundaries. Ziss |
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option for ze eckspertz only! |
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-DPMAP_RUNAWAY_WARN |
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Causes mkpmap to issue a warning if a photon reaches the |
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maximum number of bounces (as specified with -apm) and is |
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terminated. |
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-DPMAP_LOOKUP_WARN |
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Causes rtrace et al to issue warnings when short photon |
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lookups occur, i.e. fewer photons are found than specified |
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as lookup bandwidth with -ap. This is generally not fatal, |
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but can increase noise, and may indicate a higher bandwidth |
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is needed. This is disabled per default as it can result in |
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excessive console clutter. |
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-DPMAP_LOOKUP_REDO |
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Causes rtrace et al to repeat short photon map |
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lookups with a progressively larger radius until the |
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target photon count specified with -ap is met. This switch |
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has no effect in conjunction with the -am option, since this |
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disables lookup radius adaptation. |
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-DPMAP_EPANECHNIKOV |
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Causes rtrace et al to apply an Epanechnikov filter during |
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photon density estimates. This weights photons according to |
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the inverse distance to the lookup point in order to reduce |
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bias. The default behaviour does not perform filtering. |
