version=11.5.2

# new feature: pmesh BINARY "filename"
#   BINARY keyword is optional, but recommended for efficiency
#
#       *  4 bytes: P M \1 \0 
#       *  1 byte: \0 for bigEndian
#       *  3 bytes: reserved
#       *  4 bytes: (int) vertexCount
#       *  4 bytes: (int) polygonCount
#       * 64 bytes: reserved
#       *  ------------------------------
#       *  float[vertexCount*3]vertices {x,y,z}
#       *  [polygonCount] polygons 
#       *  --each polygon--
#       *    4 bytes: (int)nVertices (1,2,3, or 4)
#       *    [4 bytes * nVertices] int[nVertices]
#       *
#       * note that there is NO redundant extra vertex in this format
#
#  see little-endian example at http://chemapps.stolaf.edu/jmol/docs/misc/pmesh.bin
#  and http://chemapps.stolaf.edu/jmol/docs/misc/pmesh.bin.txt


for example: a little-endian

000001: <50> <4D> <01> <00> <20> <20> <20> <20> 
000009: <03> <00> <00> <00> <01> <00> <00> <00> 
000017: <00> <00> <00> <00> <00> <00> <00> <00> 
000025: <00> <00> <00> <00> <00> <00> <00> <00> 
000033: <00> <00> <00> <00> <00> <00> <00> <00> 
000041: <00> <00> <00> <00> <00> <00> <00> <00> 
000049: <00> <00> <00> <00> <00> <00> <00> <00> 
000057: <00> <00> <00> <00> <00> <00> <00> <00> 
000065: <00> <00> <00> <00> <00> <00> <00> <00> 
000073: <00> <00> <00> <00> <00> <00> <00> <00> 
000081: <00> <00> <80> <3F> <00> <00> <00> <40> 
000089: <00> <00> <40> <40> <00> <00> <40> <40> 
000097: <00> <00> <00> <40> <00> <00> <80> <3F> 
000105: <00> <00> <00> <00> <00> <00> <00> <00> 
000113: <00> <00> <80> <3F> <03> <00> <00> <00> 
000121: <00> <00> <00> <00> <01> <00> <00> <00> 
000129: <02> <00> <00> <00>

from VB6:

 Open "c:\temp\t.bin" For Binary As #1
 Dim s64 As String * 64
 Dim s8 As String * 8
 Dim i As Long
 Dim f As Single
 
 
 s8 = "PM" & Chr(1) & Chr(0)
 Put #1, , s8
 i = 3: Put #1, , i
 i = 1: Put #1, , i
 Put #1, , s64
 f = 1: Put #1, , f
 f = 2: Put #1, , f
 f = 3: Put #1, , f
 
 f = 3: Put #1, , f
 f = 2: Put #1, , f
 f = 1: Put #1, , f
 
 f = 0: Put #1, , f
 f = 0: Put #1, , f
 f = 1: Put #1, , f

 i = 3: Put #1, , i
 i = 0: Put #1, , i
 i = 1: Put #1, , i
 i = 2: Put #1, , i
 Close #1