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Simeon Alexander Scott wrote:
>
> Anyone know of any utilities which will convert something to an sPatch
> file? I have a 2D file I would like to import to sPatch, so I can
> extrude it.
>
> Any converter at all would be better than no converter!
Err, currently no one has published a spec for the files system. I have
tried to reverse engineer it, but I don't really know that much about
bezier patches, so it didn't go well. If any one wants to help me, I am
game.
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Joshua Boyd <bud### [at] aol com> wrote in article <348### [at] aolcom>...
> Simeon Alexander Scott wrote:
> >
> > Anyone know of any utilities which will convert something to an sPatch
> > file? I have a 2D file I would like to import to sPatch, so I can
> > extrude it.
> >
> > Any converter at all would be better than no converter!
>
> Err, currently no one has published a spec for the files system. I have
> tried to reverse engineer it, but I don't really know that much about
> bezier patches, so it didn't go well. If any one wants to help me, I am
> game.
>
I took a look to sPatch's files and they seem to be plain ASCII ones. I'll
try to explain the structure of the files using an example file i created
in sPatch to help me decipher it. Lines starting with ';' are my comments
and (I don't really know if it matters but) there shouldn't be any blank
lines in between (I've added them for readability):
sPatches
; This is just a label to simplify the parser and identify the file as
sPatch scene
version 2
; obviously the version number (version 1 is similar but the layer # are
missing)
visibility FALSE
; I don't understand this very well but it seems to be FALSE no matter what
selection FALSE
; Same goes for this one. Never seen it be TRUE
num_points 9
; The number of points in the scene (numbered 0 to 8 for this scene)
-1.500000 -0.342857 0.000000
; The coordinates of point #0 (<x> <y> <z> I presume)
0
; The layer # on which this point lies (0 based)
0
; Always 0. Don't know what it is
1
; The number of curves passing from this point
0 2
; The curve # followed by the position in the curve's point list
; (0 based, see later in the 'curves' section)
; there is one such line for each curve that passes from this point
; Now the same applies for the rest of the points in the scene
-2.385714 0.300000 0.000000
0
0
1
0 1
-1.842857 1.414286 0.000000
0
0
1
1 1
-1.714286 0.828571 0.000000
0
0
2 ; here is an example of a point with 2 curves
1 2 ; there are two lines, one for each curve
0 0
0.100000 1.428571 0.000000
1
0
1
2 0
0.100000 0.728571 0.000000
1
0
1
2 1
1.414286 1.100000 0.000000
2
0
1
3 0
0.571429 1.100000 0.000000
2
0
1
3 1
-0.985714 0.614286 0.000000
0
0
1
1 0
; The above blank line was already there!
num_curves 4
; And now the curves section, there are 4 curves (0 based too)
3 0
; the first is defined by 3 points and it is open
; (0=open, 1=closed, like a loop)
; then follow the lines that describe the points (one for each point)
3 1 0.300000
; The values here are: <point #>, <smooth flag>, <curve fitting factor>
; <smooth flag> is 1 if the curve is smooth passing from this point
; or 0 if it makes a pointed turn
1 0 0.300000
0 1 0.300000
3 1 ; this curve is closed
8 1 0.300000
2 1 0.300000
3 1 0.300000
2 0
4 1 0.300000
5 1 0.300000
2 0
6 1 0.300000
7 1 0.300000
end_patches
; And this is the end of the sPatch file.
As you can see it is quite simple (apart from some dark spots!) so it
shouldn't be much trouble to create a converter for this file format as
long as you can decode the source file you want to convert to sPatch. If it
just a series of 2D coordinates (or something quite simple) I could
possibly write a converter for you. The only problem is at the moment (due
to a total reorganization of my PC) that the only developing tool I have
available is VB 4.0 so you'll need the runtimes. If you already have them
(or have VB 4.0 installed) send me a sample of the file you want to convert
and see if I can make anything out of if.
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