I've been working a bit on importing the cat mother( http://catmother.sourceforge.net/ ) *.gm model files, primarily for three weapons, the baretta, the m16, and the shotgun. I have the baretta in 3ds format, but no uvs... No idea where the 3ds version came from. so I was gonna write a small converter that exports asc files, for later conversion to *.x/*.b3d/*.3ds . So far, I have vertex physical and textural positions. For whatever reason, getting the tris has been the hardest part. I can't seem to get it in.
Here is the source for my importer. I had one version that gathered lots of data etc., but then realized this was more efficient because all you need is the verts,the uvs, and the tris.
Const view=0 ;0-view vertices in 2d 1-View in 3d(not working)
Graphics3D 640,480
;WireFrame True
AppTitle "*.gm loader"
Global tempb=CreateBank(4)
Global ch[100]
g=loadgeometry("m16.gm")
ScaleEntity g,10,10,10
Global siz
cam=CreateCamera()
CameraClsColor cam,255,255,255
PositionEntity cam,0,0,-5
l=CreateLight()
While Not KeyHit(1)
TurnEntity g,1,1,1
RenderWorld
Flip
Wend
Function loadgeometry(fil$)
siz=FileSize(fil$)
f=ReadFile(fil$)
pdatastart=findstring(f,"points")+6+4
SeekFile f,pdatastart-4
pdataend=readbeint(f)+pdatastart
fdatastart=findstring(f,"faces")+5+4
SeekFile f,fdatastart-4
fdataend=readbeint(f)+fdatastart
tdatastart=findstring(f,"texcoordlayer")+13+4
DebugLog tdatastart
SeekFile f,tdatastart-4
tdataend=readbeint(f)+tdatastart
Cls
Color 255,255,255
mesh=CreateMesh()
surf=CreateSurface(mesh)
SeekFile f,pdatastart
While FilePos(f)<pdataend
If view Then
v=AddVertex(surf,readBEfloat(f),readBEfloat(f),readBEfloat(f))
Else
x#=readBEfloat(f)
y#=readBEfloat(f)
z#=readBEfloat(f)
Plot x*400+100,y*400+200
Plot x*400+500,z*400+100
Plot y*400+400,z*400+400
EndIf
Wend
SeekFile f,fdatastart+1
While FilePos(f)<fdataend
t=AddTriangle(surf,ReadbeShort(f),ReadbeShort(f),ReadbeShort(f))
Wend
SeekFile f,tdatastart
v=0
While FilePos(f)<tdataend
If view Then VertexTexCoords surf,v,readBEfloat(f),readBEfloat(f) Else Plot readBEfloat(f)*200+200,readBEfloat(f)*200+50
v=v+1
Wend
If Not view Then
Text 100,0,"top"
Text 500,0,"Front"
Text 300,0,"UVs: (tex coords)",True
Text 300,300,"Side"
Flip
WaitKey()
End
EndIf
Return mesh
End Function
Function ReadBEInt(file)
PokeByte tempb,3,ReadByte(file)
PokeByte tempb,2,ReadByte(file)
PokeByte tempb,1,ReadByte(file)
PokeByte tempb,0,ReadByte(file)
Return PeekInt(tempb,0)
End Function
Function ReadBEShort(file)
PokeByte tempb,1,ReadByte(file)
PokeByte tempb,0,ReadByte(file)
Return PeekShort(tempb,0)
End Function
Function ReadBEFloat#(file)
PokeByte tempb,3,ReadByte(file)
PokeByte tempb,2,ReadByte(file)
PokeByte tempb,1,ReadByte(file)
PokeByte tempb,0,ReadByte(file)
Return PeekFloat#(tempb,0)
End Function
Function findString(file,tex$)
For a=0 To Len(tex$)-1
ch[a]=Asc(Mid$(tex$,a+1,1))
Next
bp=FilePos(file)
SeekFile file,0
For a=0 To siz-Len(tex$)
b=ReadByte(file)
If ch[0]=b Then
If rec(file,2,Len(tex$)) Then SeekFile file,bp:Return a
SeekFile file,a+1
EndIf
Next
SeekFile file,bp
Return 0
End Function
Function rec(file,st,en)
b=ReadByte(file)
If ch[st-1]=b Then
If st=en Then Return 1 Else Return rec(file,st+1,en)
EndIf
Return 0
End Function
Basically, I would like a little help with this. With the constant view=0, you can see the vertex positions, and uv mapping. I have made a little package with the three model files, their textures, and the C code that imports the meshs. You can get it here: http://www.freewebs.com/botbuilder/catmother.zip (312 KB)
You can also download all the source off the catmother website. the model file stuff is in the 'sgu' folder.
Note to anyone who tries to work on this: the readBEint etc. functions are actually to read big-endian integers/floats/shorts. I also made a recursive file string searcher I think is pretty cool( fast etc. ) :)
Once converted, I will of course release the models to the general community as they are very nice/high quality.
|
