1100     double ex1,ey1,ex2,ey2;  in icvGetCrossPiecePiece()  local
1106     ex1 = p1_start.x;  in icvGetCrossPiecePiece()
1116     del = (py1-py2)*(ex1-ex2)-(px1-px2)*(ey1-ey2);  in icvGetCrossPiecePiece()
1123     delA =  (ey1-ey2)*(ex1-px1) + (ex1-ex2)*(py1-ey1);  in icvGetCrossPiecePiece()
1124     delB =  (py1-py2)*(ex1-px1) + (px1-px2)*(py1-ey1);  in icvGetCrossPiecePiece()
1135     delX =  (px1-px2)*(ey1*(ex1-ex2)-ex1*(ey1-ey2))+  in icvGetCrossPiecePiece()
1136             (ex1-ex2)*(px1*(py1-py2)-py1*(px1-px2));  in icvGetCrossPiecePiece()
1138     delY =  (py1-py2)*(ey1*(ex1-ex2)-ex1*(ey1-ey2))+  in icvGetCrossPiecePiece()
3418     double ex1,ey1,ex2,ey2;  in GetCrossLines()  local
3424     ex1 = p1_start.x;  in GetCrossLines()
3434     del = (ex1-ex2)*(py2-py1)+(ey2-ey1)*(px2-px1);  in GetCrossLines()
3440     delA =  (px1-ex1)*(py1-py2) + (ey1-py1)*(px1-px2);  in GetCrossLines()
3441     delB =  (ex1-px1)*(ey1-ey2) + (py1-ey1)*(ex1-ex2);  in GetCrossLines()
3451     delX =  (ex1-ex2)*(py1*(px1-px2)-px1*(py1-py2))+  in GetCrossLines()
3452             (px1-px2)*(ex1*(ey1-ey2)-ey1*(ex1-ex2));  in GetCrossLines()
3455             (py1-py2)*(ey1*(ex1-ex2)-ex1*(ey1-ey2));  in GetCrossLines()
3465     double ex1,ey1,ex2,ey2;  in icvGetCrossPieceVector()  local
3471     ex1 = p1_start.x;  in icvGetCrossPieceVector()
3481     del = (ex1-ex2)*(py2-py1)+(ey2-ey1)*(px2-px1);  in icvGetCrossPieceVector()
3487     delA =  (px1-ex1)*(py1-py2) + (ey1-py1)*(px1-px2);  in icvGetCrossPieceVector()
3488     delB =  (ex1-px1)*(ey1-ey2) + (py1-ey1)*(ex1-ex2);  in icvGetCrossPieceVector()
3498     delX =  (ex1-ex2)*(py1*(px1-px2)-px1*(py1-py2))+  in icvGetCrossPieceVector()
3499             (px1-px2)*(ex1*(ey1-ey2)-ey1*(ex1-ex2));  in icvGetCrossPieceVector()
3502             (py1-py2)*(ey1*(ex1-ex2)-ex1*(ey1-ey2));  in icvGetCrossPieceVector()