sfdp Unix tree

Engine

sfdp

Command, both sides

dot -Ksfdp -Tsvg input.gv

Input

graphviz-16.1.0/graphs/directed/unix.gv · 1,433 bytes

Features

multilevelportable-math difference

Result

identical on macOSdiffers under portable math

This sample is here because it differs: under the portable math library used on Linux and in WASM, sfdp's multilevel layout turns last-bit differences in pow, sin or cos into a different drawing. The viewer compares the macOS build, which matches C; the live check below runs the portable build in your browser and can load its output into the viewer. Math off macOS

OverprintSide by sideBlinkPixel diffSource diff

Comparing…

Magenta plate

100%

C onlyport onlyboth: in register

Live check, in this browserRun again

Waiting to load the WASM build (1.7 MB, about 700 KB compressed)

The browser runs renderAllBytes(input, "sfdp", "svg") on the same bytes the C reference read. WASM uses the portable math library, not Apple's libm, so a layout that depends on the last bit of sin or pow can legitimately differ (why).

Input

unix.gv

/* courtesy Ian Darwin and Geoff Collyer, Softquad Inc. */
digraph unix {
size="6,6";
  "5th Edition" -> "6th Edition";
  "5th Edition" -> "PWB 1.0";
  "6th Edition" -> "LSX";
  "6th Edition" -> "1 BSD";
  "6th Edition" -> "Mini Unix";
  "6th Edition" -> "Wollongong";
  "6th Edition" -> "Interdata";
  "Interdata" -> "Unix/TS 3.0";
  "Interdata" -> "PWB 2.0";
  "Interdata" -> "7th Edition";
  "7th Edition" -> "8th Edition";
  "7th Edition" -> "32V";
  "7th Edition" -> "V7M";
  "7th Edition" -> "Ultrix-11";
  "7th Edition" -> "Xenix";
  "7th Edition" -> "UniPlus+";
  "V7M" -> "Ultrix-11";
  "8th Edition" -> "9th Edition";
  "1 BSD" -> "2 BSD";
  "2 BSD" -> "2.8 BSD";
  "2.8 BSD" -> "Ultrix-11";
  "2.8 BSD" -> "2.9 BSD";
  "32V" -> "3 BSD";
  "3 BSD" -> "4 BSD";
  "4 BSD" -> "4.1 BSD";
  "4.1 BSD" -> "4.2 BSD";
  "4.1 BSD" -> "2.8 BSD";
  "4.1 BSD" -> "8th Edition";
  "4.2 BSD" -> "4.3 BSD";
  "4.2 BSD" -> "Ultrix-32";
  "PWB 1.0" -> "PWB 1.2";
  "PWB 1.0" -> "USG 1.0";
  "PWB 1.2" -> "PWB 2.0";
  "USG 1.0" -> "CB Unix 1";
  "USG 1.0" -> "USG 2.0";
  "CB Unix 1" -> "CB Unix 2";
  "CB Unix 2" -> "CB Unix 3";
  "CB Unix 3" -> "Unix/TS++";
  "CB Unix 3" -> "PDP-11 Sys V";
  "USG 2.0" -> "USG 3.0";
  "USG 3.0" -> "Unix/TS 3.0";
  "PWB 2.0" -> "Unix/TS 3.0";
  "Unix/TS 1.0" -> "Unix/TS 3.0";
  "Unix/TS 3.0" -> "TS 4.0";
  "Unix/TS++" -> "TS 4.0";
  "CB Unix 3" -> "TS 4.0";
  "TS 4.0" -> "System V.0";
  "System V.0" -> "System V.2";
  "System V.2" -> "System V.3";
}

Files

File	Bytes	SHA-256
input.gv	1,433
c.svg C	28,010	5522dd93323fb38fe8436d80636e39d9f89c627381ab4c1d0af6cd5c43559994
rust.svg Rust	28,021	f508bfac893e4ec1c1418fc760984dd2825579e8c77d58b2b16bc37559b0b37c

The two hashes differ even when the outputs are identical, because each file keeps its own generator comment. Made by scripts/site-samples.sh.

Previoussfdp switch networkAll samplesNextCircular Heawood