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	POLYGON HANDLING : GPOLY LIB

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How to use it :
put prgmGPOLY in the header of your program

READ ReadMe-GCORE FIRST !!!!
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#GLOBAL VARS -- GPOLY LIB#

GPoly : the type of poly.
Could be °GQUADRI or °GTRIANG

GTxtrAdr : the texture adresse (used in GTxtrTriangle)

#ENVIRONNEMENTS VARS -- GPOLY LIB#

°GGrey : the greyscale level
2:Black and white
3:3 Grey lvl
4:4 Grey lvl
Default : 2

°GTexturing : enable or not texturing
0:off,1:on
default : off

°GPixelX : decrease or increase precision in the texture
drawing
1 mean the more precision, a higher numbers mean less
precision
default : 1

#COMMANDS -- GPOLY LIB#
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GPolyInit(NUMBER_OF_VERTEX,MODE)
replace the GInit command from GCORE
NUMBER_OF_VERTEX is the number of vertex you want use
(make sure GVStr can have all this vertices)
MODE is the poygons type
°GQUADRI : quadrilatrial polygons  (4 vertex)
°GTRIANG : (3 vertex)
return : none
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GVAcess(ID_VERTEX)
Look in GVStr if the vertex as already been process.
If not, process the vertex according to GVAdr Data
return : adresse of the calculated vertex
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GDrawArray(NB_OF_POLY,ADRESSE_POLY)
Draw n polygons, according to the data in ADRESSE_POLY, 
and the polygons MODE
pls go to DATA STRUCTURE to have details on the polygons
data's.
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GTriangle(°DATA)
draw a cliped triangle, according to data
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GTxtrTriangle(°DATA)
draw aa textured triangle, according to data
The teexture adresse is in GTxtrAdr
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#DATA STRUCTURE -- GPOLY#

Polygons structure:
general :
Data(°GFILLED)
Data(°GCOLOR1,°GCOLOR2)
Data(v1,v2,v3,[v4]

°GCOLOR :
°GGREY,°GBLACK,°GWIRED,°GGREY33,°GGREY66,°GTGREY
°GHIDE : hide the face (no processing)

v1...v4 is the vertices ID (stored in GVAdr)

textured:
Data(°GTEXTURED)
Data(GTEXTURE_ADR^^r)  // 2 bytes value
Data(v1,U1^^r,V1^^r)  //U1 and V1 are 2-bytes values, it's
the coordiante of the texture in the texture space
Data(v2,U2^^r,V2^^r)
Data(v3,U3^^r,V3^^r)
[Data(v4,U4^^r,V4^^r)]

triangle data:
Data(X,Y,X2,Y2,X3,Y3)
this is 2-bytes values

textured triangle data:
Data(X,Y,U,V,X2,Y2,U2,V2,X3,Y3,U3,V3)
this is two bytes-values

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	END LIB -- GPOLY

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