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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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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 rview 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 rview.
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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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-DBIGMEM The system has lots of RAM available, so size hash
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tables and the like accordingly. Also provides for
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larger overall scene descriptions (33,553,920 primitives
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rather than 32,256).
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-DSMLFLT This setting tells Radiance to use short floats
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(4-bytes) throughout, which saves lots of memory
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but can cause calculation inaccuracies in many
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cases. Its use has been discontinued for this reason.
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