Page 152 - DCAP313_LAB_ON_COMPUTER_GRAPHICS

Lab on Computer Graphics

Notes intgrd,grm;
intkey;
intx1=10,y1=30,x2=100,y2=70;
intnewx,newy;
intxoffset=10,yoffset=5;
detectgraph(&grd,&grm);
initgraph(&grd,&grm,”“);
draw_pixelbackground();
draw_object(x1,y1,x2,y2);
while(1)
{
key=bioskey(0);
if((key&0x00FF)>0)
key=key&0x00FF;
else
key=(key&0xFF00)>>8;
switch(key)
{
caseLTARROW:
newx=x1-xoffset;
newy=y1;
move_object(x1,y1,x2,y2,newx,newy);
x1-=xoffset;
x2-=xoffset;
break;
caseRTARROW:
newx=x1+xoffset;
newy=y1;
move_object(x1,y1,x2,y2,newx,newy);
x1+=xoffset;
x2+=xoffset;
break;
caseDNARROW:
newx=x1;
newy=y1+yoffset;
move_object(x1,y1,x2,y2,newx,newy);
y1+=yoffset;
y2+=yoffset;
break;
caseUPARROW:
newx=x1;

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