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CD ROM Paradise Collection 4
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CD ROM Paradise Collection 4 1995 Nov.iso
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0008_Endpoints of PIE Segment.pas
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Pascal/Delphi Source File
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1993-08-27
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1KB
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44 lines
{
THOMAS GROFF
> would like a unit to return the endpoints of a PIE segment. You could
> always draw the arc invisibly and then use the GetArcCoords() procedure
> provided in the graph unit and save yourself some time.
}
program getlegs;
uses
graph;
var
pts3 : arccoordstype; { <---- Necessary to declare this type var. }
rad,
startang,
endang,
x, y,
gd, gm : integer;
begin
gd := detect;
InitGraph(gd,gm,'e:\bp\bgi');
cleardevice;
x := 100;
y := 100;
startang := 25;
endang := 130;
rad := 90;
setcolor(getbkcolor); { <------ Draw arc in background color. }
arc(x, y, startang, endang, rad);
GetArcCoords(pts3); { <----- This is what you want, look it up! }
setcolor(white); { <----- Show your lines now.}
line(pts3.x, pts3.y, pts3.xstart, pts3.ystart);
line(pts3.x, pts3.y, pts3.xend, pts3.yend);
outtextxy(50, 150, 'Press enter to see your original arc when ready...');
readln;
setcolor(yellow);
arc(x, y, startang, endang, rad);
outtextxy(50, 200, 'Press enter stop demo.');
readln;
closegraph;
end.