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Pascal/Delphi Source File
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1994-06-22
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3KB
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102 lines
{$r-} { <--- Need, eh? ;-) }
program polygoned_and_shaded_octagon; { inc. clipping }
{ mode-x version of polygoned objects, by Bas van Gaalen & Sven van Heel }
uses crt,x3dunit;
const
nofpolys=9; { number of polygons -1 }
nofpoints=11; { number of points -1 }
point:array[0..nofpoints,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..nofpolys,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));
type polytype=array[0..nofpolys] of integer;
var polyz,pind:polytype;
{ -------------------------------------------------------------------------- }
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=1; zst=-1;
var
xp,yp,z:array[0..nofpoints] of integer;
x,y,i,j,k:integer;
n,key,phix,phiy,phiz:byte;
begin
address := 0;
phix:=0; phiy:=0; phiz:=0;
fillchar(xp,sizeof(xp),0);
fillchar(yp,sizeof(yp),0);
fillchar(z,sizeof(z),0);
repeat
retrace;
setborder(60);
for n:=0 to nofpoints 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;
xp[n]:=160+cosinus(phix)+(-x*dist) div (z[n]-dist);
yp[n]:=100-sinus(phiy) div 2+(-y*dist) div (z[n]-dist);
end;
for n:=0 to nofpolys 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,nofpolys);
address:=16000-address;
setaddress(address);
cls;
for n:=5 to nofpolys 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]+64);
inc(phix,xst); inc(phiy,yst); inc(phiz,zst);
setborder(0);
until keypressed;
end;
{ -------------------------------------------------------------------------- }
var i:byte;
begin
setmodex;
{border:=true;}
for i:=1 to 255 do setpal(i,i div 16,i div 8,i div 4);
rotate_cube;
textmode(lastmode);
end.
{ Mode-x version! Quite final, except for major asm updates.
Realy smooth and fast (relative to the 13h version)! }