ç¿ïW(X1,Y1)Ç∆(X2,Y2)Ç™ìôǵÇØÇÍÇŒ
TRUEÇÅAÇ≈Ç»ÇØÇÍÇŒFALSEÇï‘ǵNjÇ∑ÅB

EqualPt(X1, Y1, X2, Y2 : REAL) : BOOLEAN;

éläpå`ç¿ïW(X1,Y1,X2,Y2)Ç∆(X3,Y3,X4,Y4)Ç™ìôǵÇØÇÍÇŒTRUEÇÇ≈Ç»ÇØÇÍÇŒFALSEÇï‘ǵNjÇ∑ÅB

EqualRect(X1, Y1, X2, Y2, X3, Y3, X4, Y4 : REAL) : BOOLEAN;

éläpå`ç¿ïW(X1,Y1,X2,Y2)Ç∆(X3,X3,X4,Y4)ÇÃ2ǬÇä‹Çfiéläpå`ÇÃç¿ïWÇ(X5,Y5,X6,Y6)
Ç…ï‘ǵNjÇ∑ÅB

UnionRect(X1, Y1, X2, Y2, X3, Y3, X4, Y4 : REAL;  VAR X5, Y5, X6, Y6 : REAL);

ç¿ïWX,YÇ™éläpå`(X1,Y1)(X2,Y2)ÇÃíÜDždžÇÍÇŒTRUEÇÅAÇ≈Ç»ÇØÇÍÇŒFALSEÇï‘ǵNjÇ∑ÅB

PtInRect(X, Y, X1, Y1, X2, Y2 : REAL) : BOOLEAN;

2ì_ä‘ÇÃãóó£Çï‘ǵNjÇ∑ÅB

Distance(X1, Y1, X2, Y2 : REAL) : REAL;

HÇ™ëΩäpå`Ç÷ÇÃÉnÉìÉhÉãÇÃéûÅAç¿ïW(X,Y)Ç™ëΩäpå`ì‡Ç…džÇÍÇŒTRUEÇÅAÇ≈Ç»ÇØÇÍÇŒFALSEÇï‘ǵNjÇ∑ÅB

PtInPoly(X, Y : REAL;  H : HANDLE) : BOOLEAN;