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root/radiance/ray/doc/notes/compile_switches
Revision: 1.1
Committed: Sat Mar 15 17:32:55 2003 UTC (21 years, 4 months ago) by greg
Branch: MAIN
CVS Tags: rad3R5
Log Message:
Added and updated documentation for 3.5 release

File Contents

# Content
1 Here is a list of compile switches, used to customize Radiance code
2 for specific machines and users:
3
4 -DMC If set, switches from default low-discrepency sequence
5 sampling to true (pseudorandom) Monte Carlo. Use if
6 the "brushed" appearance of specular highlights and
7 penumbras bothers you.
8
9 -DALIGN=(type) Alignment type, machine-dependent. Most RISC
10 architectures align on 8-word boundaries (double).
11 The default alignment type is int.
12
13 -DSPEED=(MIPS) Millions of instructions per second for this
14 processor (approximate). This is used to decide
15 certain unimportant timing issues such as how many
16 rays to trace before checking input in rview and
17 whether or not to optimize the color table in ximage
18 on 8-bit displays.
19
20 -DWFLUSH=(rays) Override for number of rays before flush in rview.
21
22 -DBSD Operating system has a strong Berkeley flavor, meaning
23 that bcopy() and bzero() are present but maybe memcpy()
24 and memset() are not. (See common/standard.h for other
25 things this flag affects.) Also affects certain system
26 calls, such as signal handling and resource tracking.
27
28 -DBIGMEM The system has lots of RAM available, so size hash
29 tables and the like accordingly. Also provides for
30 larger overall scene descriptions (33,553,920 primitives
31 rather than 32,256).
32
33 -DSMLFLT This setting tells Radiance to use short floats
34 (4-bytes) throughout, which saves lots of memory
35 but can cause calculation inaccuracies in many
36 cases. Its use has been discontinued for this reason.