196 double d = this->CrossProduct(
_line);
220 (this->pts[0].X() * this->pts[1].Y() -
221 this->pts[0].Y() * this->pts[1].X()) -
222 (this->pts[0].X() - this->pts[1].X()) *
226 (this->pts[0].X() * this->pts[1].Y() -
227 this->pts[0].Y() * this->pts[1].X()) -
228 (this->pts[0].Y() - this->pts[1].Y()) *