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3dhexash.pas
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Pascal/Delphi Source File
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1994-06-22
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3KB
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108 lines
{$r-}
program polygoned_and_shaded_hexagon; { inclusief clipping test! }
uses
crt,threedee;
const
divd=128;
dist=200;
point:array[0..11,0..2] of integer=(
(-20,-20, 30),( 20,-20, 30),( 40,-40, 0),( 20,-20,-30),
(-20,-20,-30),(-40,-40, 0),(-20, 20, 30),( 20, 20, 30),
( 40, 40, 0),( 20, 20,-30),(-20, 20,-30),(-40, 40, 0));
planes:array[0..9,0..3] of byte=(
(0,1,7,6),(1,2,8,7),(9,8,2,3),(10,9,3,4),(10,4,5,11),
(6,11,5,0),(0,1,2,5),(5,2,3,4),(6,7,8,11),(11,8,9,10));
var
polyz:array[0..9] of integer;
pind:array[0..9] of byte;
{ -------------------------------------------------------------------------- }
procedure quicksort(lo,hi:integer);
procedure sort(l,r:integer);
var i,j,x,y:integer;
begin
i:=l; j:=r; x:=polyz[(l+r) div 2];
repeat
while polyz[i]<x do inc(i);
while x<polyz[j] do dec(j);
if i<=j then begin
y:=polyz[i]; polyz[i]:=polyz[j]; polyz[j]:=y;
y:=pind[i]; pind[i]:=pind[j]; pind[j]:=y;
inc(i); dec(j);
end;
until i>j;
if l<j then sort(l,j);
if i<r then sort(i,r);
end;
begin
sort(lo,hi);
end;
{ -------------------------------------------------------------------------- }
procedure rotate_cube;
const xst=1; yst=2; zst=-3;
var xp,yp,z:array[0..11] of integer; x,y,i,j,k:integer; n,Key,phix,phiy,phiz:byte;
begin
phix:=0; phiy:=0; phiz:=0;
fillchar(xp,sizeof(xp),0);
fillchar(yp,sizeof(yp),0);
repeat
{retrace;}
setborder(10);
{
for n:=5 to 9 do
polygon(xp[planes[pind[n],0]],yp[planes[pind[n],0]],
xp[planes[pind[n],1]],yp[planes[pind[n],1]],
xp[planes[pind[n],2]],yp[planes[pind[n],2]],
xp[planes[pind[n],3]],yp[planes[pind[n],3]],0);
}
cls(virseg);
for n:=0 to 11 do begin
i:=(cosinus(phiy)*point[n,0]-sinus(phiy)*point[n,2]) div divd;
j:=(cosinus(phiz)*point[n,1]-sinus(phiz)*i) div divd;
k:=(cosinus(phiy)*point[n,2]+sinus(phiy)*point[n,0]) div divd;
x:=(cosinus(phiz)*i+sinus(phiz)*point[n,1]) div divd;
y:=(cosinus(phix)*j+sinus(phix)*k) div divd;
z[n]:=(cosinus(phix)*k-sinus(phix)*j) div divd+cosinus(phix) div 3;
xp[n]:=160+sinus(phix)+(-x*dist) div (z[n]-dist);
yp[n]:=100+cosinus(phix) div 2+(-y*dist) div (z[n]-dist);
end;
for n:=0 to 9 do begin
polyz[n]:=(z[planes[n,0]]+z[planes[n,1]]+z[planes[n,2]]+z[planes[n,3]]) div 4;
pind[n]:=n;
end;
quicksort(0,9);
for n:=5 to 9 do
polygon(xp[planes[pind[n],0]],yp[planes[pind[n],0]],
xp[planes[pind[n],1]],yp[planes[pind[n],1]],
xp[planes[pind[n],2]],yp[planes[pind[n],2]],
xp[planes[pind[n],3]],yp[planes[pind[n],3]],polyz[n]+55);
inc(phix,xst); inc(phiy,yst); inc(phiz,zst);
setborder(0);
flip(virseg,vidseg);
until keypressed;
end;
{ -------------------------------------------------------------------------- }
var i:word;
begin
asm mov ax,13h; int 10h; end;
getmem(virscr,64000);
virseg:=seg(virscr^);
cls(virseg);
for i:=0 to 255 do stab[i]:=round(sin(i*pi/128)*divd);
{for i:=1 to 150 do setpal(i,10+i div 5,30+i div 5,10+i div 5);}
for i:=1 to 150 do setpal(i,i div 4,i div 2,i div 4);
rotate_cube;
freemem(virscr,64000);
textmode(lastmode);
end.
{ a non-mode-x version }