Radiosity lighting implemented in C.
Doxygen documentation for the code is available in http://www.cs.helsinki.fi/u/totalvit/radiosity/doc/files.html
First compile the code with
$ ./compile.sh
If it doesn't work, try ./compile_portable.sh or ./compile_mac.sh.
Then enter the example directory, and run ./gen.sh
$ cd example
$ ./gen.sh
gen.sh is a script that compiles and runs a scene generation program, generating the file example.in containing a description of all the triangles. Using this file as input, it runs the radiosity renderer to that file, generating the output image example.bmp. In the end, it also converts this BMP image to a PNG image example.png (this might not work if you do not have ImageMagick installed). For more details, read the script gen.sh.
As an optional parameter, you may specify the edge length limit to ./gen.sh. The default value is 0.2. If you specify a smaller value, the triangles are subdivided into smaller triangles and thus the rendered image will have better quality. Of course, this drastically increases the time and memory complexity.
All the tests were run on the Ukko cluster. Note that the tests with memory usage above 32G had to use disk storage, causing worse performance.
| Edge length limit | Triangles | Time (H:mm:ss) | Memory | Output |
|---|---|---|---|---|
| 0.020 | 296827 | 31:10:45 | 352.43 GB | PNG |
| 0.024 | 207291 | 15:08:38 | 171.88 GB | PNG |
| 0.028 | 154543 | 8:38:42 | 95.53 GB | PNG |
| 0.032 | 118755 | 5:32:33 | 56.41 GB | PNG |
| 0.036 | 94985 | 3:23:12 | 36.09 GB | PNG |
| 0.040 | 77308 | 1:09:37 | 23.91 GB | PNG |
| 0.044 | 64312 | 0:48:14 | 16.54 GB | PNG |
| 0.048 | 54179 | 0:34:12 | 11.74 GB | PNG |
| 0.052 | 46466 | 0:25:12 | 8.64 GB | PNG |
| 0.056 | 40483 | 0:19:08 | 6.56 GB | PNG |
| 0.060 | 35336 | 0:14:31 | 4.99 GB | PNG |
| 0.064 | 31481 | 0:11:29 | 3.96 GB | PNG |
| 0.068 | 28154 | 0:09:12 | 3.17 GB | PNG |
| 0.072 | 25454 | 0:07:31 | 2.59 GB | PNG |
| 0.076 | 22814 | 0:06:02 | 2.08 GB | PNG |
| 0.080 | 20830 | 0:05:01 | 1.74 GB | PNG |
| 0.084 | 18921 | 0:04:09 | 1.43 GB | PNG |
| 0.088 | 17207 | 0:03:26 | 1.18 GB | PNG |
| 0.092 | 15678 | 0:02:52 | 0.98 GB | PNG |
| 0.096 | 14516 | 0:02:27 | 0.84 GB | PNG |
| 0.100 | 13331 | 0:02:03 | 0.71 GB | PNG |
| 0.104 | 12458 | 0:01:48 | 0.62 GB | PNG |
| 0.108 | 11458 | 0:01:31 | 0.53 GB | PNG |
| 0.112 | 10744 | 0:01:20 | 0.46 GB | PNG |
| 0.116 | 10072 | 0:01:10 | 0.41 GB | PNG |
| 0.120 | 9567 | 0:01:04 | 0.37 GB | PNG |
| 0.124 | 9020 | 0:00:56 | 0.33 GB | PNG |
| 0.128 | 8601 | 0:00:51 | 0.30 GB | PNG |
| 0.132 | 8238 | 0:00:47 | 0.27 GB | PNG |
| 0.136 | 7799 | 0:00:42 | 0.24 GB | PNG |
| 0.140 | 7470 | 0:00:39 | 0.22 GB | PNG |
| 0.144 | 7083 | 0:00:35 | 0.20 GB | PNG |
| 0.148 | 6704 | 0:00:31 | 0.18 GB | PNG |
| 0.152 | 6386 | 0:00:28 | 0.16 GB | PNG |
| 0.156 | 6036 | 0:00:25 | 0.15 GB | PNG |
| 0.160 | 5820 | 0:00:23 | 0.14 GB | PNG |
| 0.164 | 5537 | 0:00:21 | 0.12 GB | PNG |
| 0.168 | 5227 | 0:00:19 | 0.11 GB | PNG |
| 0.172 | 5067 | 0:00:18 | 0.10 GB | PNG |
| 0.176 | 4854 | 0:00:16 | 0.09 GB | PNG |
| 0.180 | 4562 | 0:00:14 | 0.08 GB | PNG |
| 0.184 | 4324 | 0:00:13 | 0.07 GB | PNG |
| 0.188 | 4185 | 0:00:12 | 0.07 GB | PNG |
| 0.192 | 4006 | 0:00:11 | 0.06 GB | PNG |
| 0.196 | 3866 | 0:00:10 | 0.06 GB | PNG |
| 0.200 | 3690 | 0:00:10 | 0.05 GB | PNG |
