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asteroids/source/ASTEROID.PAS

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uses crt,keyboard,sencos;
const
marge_dalt=20;
marge_baix=460;
marge_esq=20;
marge_dret=620;
max_ipunts=30;
max_ornis=15;
velocitat=2;
velocitat_max=6;
max_bales=3;
type
ipunt=RECORD r,angle:real; END;
punt=RECORD x,y:integer; END;
ivector=array [0..max_ipunts-1] of ipunt;
triangle=RECORD p1,p2,p3:ipunt;
centre:punt;
angle:real;
velocitat:real;
END;
poligon=RECORD ipunts:^ivector;
ipuntx:ivector;
centre:punt;
angle:real;
velocitat:real;
n:byte;
drotacio,rotacio:real;
esta:boolean;
END;
pvirt=array [1..38400] of byte;
var nau:triangle;pol:poligon;
ang:real;
ch:char;
Dx,Dy:word;
i,aux:byte;
dist:integer;
puntaux:punt;
orni:array [1..max_ornis] of poligon;
virt:^pvirt;
bales:array [1..max_bales] of poligon;
procedure volca;
var i:word;
begin
for i:=1 to 38400 do mem[$A000:i]:=mem[seg(virt^):i];
end;
procedure crear_poligon_regular(var pol:poligon;n:byte;r:real);
var i:word;act,interval:real;aux:ipunt;
begin
{getmem(pol.ipunts,{n*464000);}
interval:=2*pi/n;
act:=0;
for i:=0 to n-1 do begin
aux.r:=r;
aux.angle:=act;
pol.ipuntx[i]:=aux;
act:=act + interval;
end;
pol.centre.x:=320;
pol.centre.y:=200;
pol.angle:=0;
pol.velocitat:=velocitat;
pol.n:=n;
pol.drotacio:=0.078539816;
pol.rotacio:=0;
end;
procedure MCGA;
begin
asm
mov ax,0012h
int 10h
end;
directvideo:= false;
end;
procedure Text;
begin
asm
mov ax,0003h
int 10h
end;
end;
procedure WaitRetrace; assembler;
label
l1,l2;
asm
mov dx,3DAh
l1:
in al,dx
and al,08h
jnz l1
l2:
in al,dx
and al,08h
jz l2
end;
procedure posa(x,y:word;color:byte);
begin
if color=1 then
case (x mod 8) of
0:mem[seg(virt^):y*80+(x div 8)]:=(mem[seg(virt^):y*80+(x div 8)]AND $7F)OR $80;
1:mem[seg(virt^):y*80+(x div 8)]:=(mem[seg(virt^):y*80+(x div 8)]AND $BF)OR $40;
2:mem[seg(virt^):y*80+(x div 8)]:=(mem[seg(virt^):y*80+(x div 8)]AND $DF)OR $20;
3:mem[seg(virt^):y*80+(x div 8)]:=(mem[seg(virt^):y*80+(x div 8)]AND $EF)OR $10;
4:mem[seg(virt^):y*80+(x div 8)]:=(mem[seg(virt^):y*80+(x div 8)]AND $F7)OR $08;
5:mem[seg(virt^):y*80+(x div 8)]:=(mem[seg(virt^):y*80+(x div 8)]AND $FB)OR $04;
6:mem[seg(virt^):y*80+(x div 8)]:=(mem[seg(virt^):y*80+(x div 8)]AND $FD)OR $02;
7:mem[seg(virt^):y*80+(x div 8)]:=(mem[seg(virt^):y*80+(x div 8)]AND $FE)OR $01;
end;
if color=0 then
case (x mod 8) of
0:mem[seg(virt^):y*80+(x div 8)]:=(mem[seg(virt^):y*80+(x div 8)]AND $7F);
1:mem[seg(virt^):y*80+(x div 8)]:=(mem[seg(virt^):y*80+(x div 8)]AND $BF);
2:mem[seg(virt^):y*80+(x div 8)]:=(mem[seg(virt^):y*80+(x div 8)]AND $DF);
3:mem[seg(virt^):y*80+(x div 8)]:=(mem[seg(virt^):y*80+(x div 8)]AND $EF);
4:mem[seg(virt^):y*80+(x div 8)]:=(mem[seg(virt^):y*80+(x div 8)]AND $F7);
5:mem[seg(virt^):y*80+(x div 8)]:=(mem[seg(virt^):y*80+(x div 8)]AND $FB);
6:mem[seg(virt^):y*80+(x div 8)]:=(mem[seg(virt^):y*80+(x div 8)]AND $FD);
7:mem[seg(virt^):y*80+(x div 8)]:=(mem[seg(virt^):y*80+(x div 8)]AND $FE);
end;
end;
function llig(x,y:word):byte;
begin
case (x mod 8) of
0:llig:=(mem[seg(virt^):y*80+(x div 8)]AND $80)shr 7;
1:llig:=(mem[seg(virt^):y*80+(x div 8)]AND $40)shr 6;
2:llig:=(mem[seg(virt^):y*80+(x div 8)]AND $20)shr 5;
3:llig:=(mem[seg(virt^):y*80+(x div 8)]AND $10)shr 4;
4:llig:=(mem[seg(virt^):y*80+(x div 8)]AND $08)shr 3;
5:llig:=(mem[seg(virt^):y*80+(x div 8)]AND $04)shr 2;
6:llig:=(mem[seg(virt^):y*80+(x div 8)]AND $02)shr 1;
7:llig:=(mem[seg(virt^):y*80+(x div 8)]AND $01);
end;
end;
procedure posavga(x,y:word;color:byte);
begin
if color=1 then
case (x mod 8) of
0:mem[$A000:y*80+(x div 8)]:=(mem[$A000:y*80+(x div 8)]AND $7F)OR $80;
1:mem[$A000:y*80+(x div 8)]:=(mem[$A000:y*80+(x div 8)]AND $BF)OR $40;
2:mem[$A000:y*80+(x div 8)]:=(mem[$A000:y*80+(x div 8)]AND $DF)OR $20;
3:mem[$A000:y*80+(x div 8)]:=(mem[$A000:y*80+(x div 8)]AND $EF)OR $10;
4:mem[$A000:y*80+(x div 8)]:=(mem[$A000:y*80+(x div 8)]AND $F7)OR $08;
5:mem[$A000:y*80+(x div 8)]:=(mem[$A000:y*80+(x div 8)]AND $FB)OR $04;
6:mem[$A000:y*80+(x div 8)]:=(mem[$A000:y*80+(x div 8)]AND $FD)OR $02;
7:mem[$A000:y*80+(x div 8)]:=(mem[$A000:y*80+(x div 8)]AND $FE)OR $01;
end;
if color=0 then
case (x mod 8) of
0:mem[$A000:y*80+(x div 8)]:=(mem[$A000:y*80+(x div 8)]AND $7F);
1:mem[$A000:y*80+(x div 8)]:=(mem[$A000:y*80+(x div 8)]AND $BF);
2:mem[$A000:y*80+(x div 8)]:=(mem[$A000:y*80+(x div 8)]AND $DF);
3:mem[$A000:y*80+(x div 8)]:=(mem[$A000:y*80+(x div 8)]AND $EF);
4:mem[$A000:y*80+(x div 8)]:=(mem[$A000:y*80+(x div 8)]AND $F7);
5:mem[$A000:y*80+(x div 8)]:=(mem[$A000:y*80+(x div 8)]AND $FB);
6:mem[$A000:y*80+(x div 8)]:=(mem[$A000:y*80+(x div 8)]AND $FD);
7:mem[$A000:y*80+(x div 8)]:=(mem[$A000:y*80+(x div 8)]AND $FE);
end;
end;
function modul(p:punt):real;
begin
modul:=sqrt(sqr(p.x)+sqr(p.y));
end;
procedure diferencia(o,d:punt;var p:punt);
begin
p.x:=o.x-d.x;
p.y:=o.y-d.y;
end;
function distancia(o,d:punt):integer;
var p:punt;
begin
diferencia(o,d,p);
distancia:=round(modul(p));
end;
function angle(p:punt):real;
begin
if p.y<>0 then angle:=arctan(p.x/p.y);
end;
procedure clsvirt;
var i:word;
begin
for i:=1 to 38400 do mem[seg(virt^):i]:=0;
end;
function linea(x1,y1,x2,y2,color:word):boolean;
function sign(x:integer):integer; {like sgn(x) in basic}
begin if x<0 then sign:=-1 else if x>0 then sign:=1 else sign:=0 end;
var
x,y,count,xs,ys,xm,ym,col:integer;
begin
linea:=false;
col:=0;
x:=x1;y:=y1;
xs:=x2-x1; ys:=y2-y1;
xm:=sign(xs); ym:=sign(ys);
xs:=abs(xs); ys:=abs(ys);
if llig(x,y)=1 then inc(col);
posa(x,y,color);
if xs > ys
then begin {flat line <45 deg}
count:=-(xs div 2);
while (x <> x2 ) do begin
count:=count+ys;
x:=x+xm;
if count>0 then begin
y:=y+ym;
count:=count-xs;
end;
if llig(x,y)=1 then inc(col);
posa(x,y,color);
end;
end
else begin {steep line >=45 deg}
count:=-(ys div 2);
while (y <> y2 ) do begin
count:=count+xs;
y:=y+ym;
if count>0 then begin
x:=x+xm;
count:=count-ys;
end;
if llig(x,y)=1 then inc(col);
posa(x,y,color);
end;
end;
if col>2 then linea:=true;
end;
function rota_tri(tri:triangle;angul,velocitat:real;color:byte):byte;
var x1,x2,x3,y1,y2,y3:word;
begin
x1:=round((tri.p1.r+velocitat)*cos(tri.p1.angle+angul))+tri.centre.x;
x2:=round((tri.p2.r+velocitat)*cos(tri.p2.angle+angul{+velocitat/20}))+tri.centre.x;
x3:=round((tri.p3.r+velocitat)*cos(tri.p3.angle+angul{-velocitat/20}))+tri.centre.x;
y1:=round((tri.p1.r+velocitat)*sin(tri.p1.angle+angul))+tri.centre.y;
y2:=round((tri.p2.r+velocitat)*sin(tri.p2.angle+angul{+velocitat/20}))+tri.centre.y;
y3:=round((tri.p3.r+velocitat)*sin(tri.p3.angle+angul{-velocitat/20}))+tri.centre.y;
rota_tri:=0;
if linea(x1,y1,x2,y2,color) then rota_tri:=1 ;
if linea(x1,y1,x3,y3,color) then rota_tri:=1;
if linea(x3,y3,x2,y2,color) then rota_tri:=1;
end;
procedure rota_pol(pol:poligon;angul:real;color:byte);
var xy:array [0..max_ipunts] of punt;i:byte;
begin
for i:=0 to pol.n-1 do begin
xy[i].x:=round((pol.ipuntx[i].r)*cos(pol.ipuntx[i].angle+angul))+pol.centre.x;
xy[i].y:=round((pol.ipuntx[i].r)*sin(pol.ipuntx[i].angle+angul))+pol.centre.y;
end;
for i:=0 to pol.n-2 do
linea(xy[i].x,xy[i].y,xy[i+1].x,xy[i+1].y,color);
linea(xy[pol.n-1].x,xy[pol.n-1].y,xy[0].x,xy[0].y,color);
end;
procedure mou_orni(var orni:poligon);
var dx,dy:real;
begin
orni.angle:=orni.angle{+(random(256)/512)*(random(3)-1)};
Dy:=round(orni.velocitat*sin(orni.angle-pi/2))+orni.centre.y;
Dx:=round(orni.velocitat*cos(orni.angle-pi/2))+orni.centre.x;
if (dy>marge_dalt) and (dy<marge_baix) then
orni.centre.y:=round(Dy)
else orni.angle:=orni.angle+(random(256)/512)*(random(3)-1);
if (dx>marge_esq) and (dx<marge_dret) then
orni.centre.x:=round(Dx)
else orni.angle:=orni.angle+(random(256)/512)*(random(3)-1);
orni.rotacio:=orni.rotacio+orni.drotacio;
end;
procedure mou_bales(var orni:poligon);
var dx,dy:real;
begin
orni.angle:=orni.angle{+(random(256)/512)*(random(3)-1)};
Dy:=round(orni.velocitat*sin(orni.angle-pi/2))+orni.centre.y;
Dx:=round(orni.velocitat*cos(orni.angle-pi/2))+orni.centre.x;
if (dy>marge_dalt) and (dy<marge_baix) then
orni.centre.y:=round(Dy)
else {orni.angle:=orni.angle+(random(256)/512)*(random(3)-1)}orni.esta:=false;
if (dx>marge_esq) and (dx<marge_dret) then
orni.centre.x:=round(Dx)
else {orni.angle:=orni.angle+(random(256)/512)*(random(3)-1)}orni.esta:=false;;
end;
var itocado:word;
chatarra_cosmica:poligon;
procedure tocado;
var i,j,k:word;dx,dy:word;
begin
if itocado=1 then begin
chatarra_cosmica.centre.x:=nau.centre.x;
chatarra_cosmica.centre.y:=nau.centre.y;
chatarra_cosmica.n:=max_ipunts;
for i:=0 to max_ipunts-1 do begin
chatarra_cosmica.ipuntx[i].r:=1;
chatarra_cosmica.ipuntx[i].angle:=random(360)*57.295779513;
end;
nau.velocitat:=0;
end;
if ((nau.p1.r>1) and (nau.p2.r>1)and (nau.p3.r>1)and (itocado<170)) then begin
nau.p1.r:=nau.p1.r-0.7;
nau.p2.r:=nau.p2.r-0.7;
nau.p3.r:=nau.p3.r-0.7;
nau.angle:=nau.angle-0.3;
rota_tri(nau,nau.angle,0,1);
end
else begin
for i:=0 to max_ipunts-1 do begin
chatarra_cosmica.ipuntx[i].r:=chatarra_cosmica.ipuntx[i].r+3;
dx:=round((chatarra_cosmica.ipuntx[i].r)*cos(chatarra_cosmica.ipuntx[i].angle))
+chatarra_cosmica.centre.x;
dy:=round((chatarra_cosmica.ipuntx[i].r)*sin(chatarra_cosmica.ipuntx[i].angle))
+chatarra_cosmica.centre.y;
if ((dx>=0)AND(dx<640)AND(dy>0)AND(dy<480))then posa(dx,dy,1);
end;
end;
inc(itocado);
if itocado=170 then begin
nau.p1.r:=12;nau.p1.angle:=3*pi/2;
nau.p2.r:=12;nau.p2.angle:=pi/4;
nau.p3.r:=12;nau.p3.angle:=(3*pi)/4;
nau.angle:=0;
nau.centre.x:=320;nau.centre.y:=240;
end;
if ((itocado>170)and(itocado mod 3=0)) then rota_tri(nau,nau.angle,nau.velocitat,1);
if itocado>250 then itocado:=0;
end;
begin
randomize;
getmem(virt,38400);
itocado:=0;
clsvirt;
nau.p1.r:=12;nau.p1.angle:=3*pi/2;
nau.p2.r:=12;nau.p2.angle:=pi/4;
nau.p3.r:=12;nau.p3.angle:=(3*pi)/4;
nau.angle:=0;
nau.centre.x:=320;nau.centre.y:=240;
crear_poligon_regular(pol,10,200);
for i:=1 to max_ornis do crear_poligon_regular(orni[i],5,20);
mcga;
rota_pol(pol,0,1);
instalarkb;
repeat
{ rota_tri(nau,nau.angle,nau.velocitat,0);}
clsvirt;
if teclapuls(KEYarrowright) then nau.angle:=nau.angle+0.157079632;
if teclapuls(KEYarrowleft) then nau.angle:=nau.angle-0.157079632;
if teclapuls(KEYarrowup) then begin
if nau.velocitat<velocitat_max then nau.velocitat:=nau.velocitat+0.2;
end;
if teclapuls(KEYspace)and(bales[1].esta=false) then begin
bales[1].esta:=true;
bales[1].centre.x:=nau.centre.x;
bales[1].centre.y:=nau.centre.y;
bales[1].n:=2;
bales[1].velocitat:=7;
bales[1].ipuntx[1].r:=10;
bales[1].ipuntx[1].angle:=pi/2+nau.angle;
bales[1].ipuntx[2].r:=20;
bales[1].ipuntx[2].angle:=pi/2+nau.angle;
bales[1].angle:=nau.angle;
end;
Dy:=round(nau.velocitat*sin(nau.angle-pi/2))+nau.centre.y;
Dx:=round(nau.velocitat*cos(nau.angle-pi/2))+nau.centre.x;
if (dy>marge_dalt) and (dy<marge_baix) then
nau.centre.y:=Dy;
if (dx>marge_esq) and (dx<marge_dret) then
nau.centre.x:=Dx;
if (nau.velocitat>0.1) then nau.velocitat:=nau.velocitat-0.1;
{ dist:=distancia(nau.centre,pol.centre);
diferencia(pol.centre,nau.centre,puntaux);
if dist<(pol.ipuntx[1].r+30) then begin
nau.centre.x:=nau.centre.x
+round(dist*cos(angle(puntaux)+0.031415));
nau.centre.y:=nau.centre.y
+round(dist*sin(angle(puntaux)+0.031415));
end;}
{ for i:=1 to 5 do begin
rota_pol(orni[i],ang,0);
end;}
for i:=1 to max_ornis do begin
mou_orni(orni[i]);
rota_pol(orni[i],orni[i].rotacio,1);
end;
if itocado=0 then aux:=rota_tri(nau,nau.angle,nau.velocitat,1)
else tocado;
if (aux=1) then begin inc(itocado);aux:=0;end;
if bales[1].esta then begin
mou_bales(bales[1]);
rota_pol(bales[1],0,1);
end;
waitretrace;
volca;
{ if aux=1 then begin {gotoxy(0,0);write('tocado')tocado;delay(200);end;}
gotoxy(50,24);
write('<27> Visente i Sergi');
gotoxy(50,25);
write('<27>ETA 2.2 2/6/99');
until teclapuls(keyesc);
desinstalarkb;
ang:=0;
repeat waitretrace;rota_pol(pol,ang,0); ang:=ang+0.031415 ;rota_pol(pol,ang,1);until keypressed;
text;
end.
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