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%% $Id: pst-3d.pro 247 2010-01-04 22:45:42Z herbert $
% PostScript prologue for pst-3d.tex.
% Version 0.01, 2010/01/01
%
/tx@3Ddict 300 dict def
tx@3Ddict begin
%
/SetMatrixThreeD {
dup sin /e ED cos /f ED
/p3 ED /p2 ED /p1 ED
p1 0 eq
{ /a 0 def /b p2 0 le { 1 } { -1 } ifelse def
p3 p2 abs
}
{ p2 0 eq
{ /a p1 0 lt { -1 } { 1 } ifelse def /b 0 def
p3 p1 abs
}
{ p1 dup mul p2 dup mul add sqrt dup
p1 exch div /a ED
p2 exch div neg /b ED
p3 p1 a div
}
ifelse
}
ifelse
atan dup sin /c ED cos /d ED
/Matrix3D
[
b f mul c a mul e mul sub
a f mul c b mul e mul add
d e mul
b e mul neg c a mul f mul sub
a e mul neg c b mul f mul add
d f mul
] def
} def
%
/ProjThreeD {
/z ED /y ED /x ED
Matrix3D aload pop
z mul exch y mul add exch x mul add
4 1 roll
z mul exch y mul add exch x mul add
exch
} def
%
/SetMatrixEmbed {
SetMatrixThreeD
Matrix3D aload pop
/z3 ED /z2 ED /z1 ED /x3 ED /x2 ED /x1 ED
SetMatrixThreeD
[
Matrix3D aload pop
z3 mul exch z2 mul add exch z1 mul add 4 1 roll
z3 mul exch z2 mul add exch z1 mul add
Matrix3D aload pop
x3 mul exch x2 mul add exch x1 mul add 4 1 roll
x3 mul exch x2 mul add exch x1 mul add
3 -1 roll 3 -1 roll 4 -1 roll 8 -3 roll 3 copy
x3 mul exch x2 mul add exch x1 mul add 4 1 roll
z3 mul exch z2 mul add exch z1 mul add
]
concat
} def
%
/TMSave {
tx@Dict /TMatrix known not { /TMatrix { } def /RAngle { 0 } def } if
/TMatrix [ TMatrix CM ] cvx def
} def
%
/TMRestore { CP /TMatrix [ TMatrix setmatrix ] cvx def moveto } def
%
/TMChange {
TMSave
/cp [ currentpoint ] cvx def % ??? Check this later.
CM
CP T STV
CM matrix invertmatrix % Inv(M')
matrix concatmatrix % M Inv(M')
exch exec
concat cp moveto
} def
%
end % of tx@3Ddict
%%
%% End of file `pst-3d.pro'.
|
