// Build outer transformation matrix for the positioning
void CCPACSFuselagePositioning::BuildMatrix(void)
{
// Compose the transformation for the tip section reference point.
// The positioning transformation is basically a translation in two steps:
// 1. from the fuselage origin to the startPoint (= endPoint of previous positioning)
// 2. from the innerPoint to the endPoint with coordinates given
// in a "spherical" coordinate system (length, sweepAngle, dihedralAngle).
// The original section is neither rotated by sweepAngle nor by dihedralAngle.
// Calculate the cartesian translation components for step two from "spherical" input coordinates
CTiglTransformation tempTransformation;
tempTransformation.SetIdentity();
tempTransformation.AddRotationZ(-sweepangle);
tempTransformation.AddRotationX(dihedralangle);
gp_Pnt tempPnt = tempTransformation.Transform(gp_Pnt(0.0, length, 0.0));
// Setup transformation combining both steps
endTransformation.SetIdentity();
endTransformation.AddTranslation( startPoint.x + tempPnt.X() ,
startPoint.y + tempPnt.Y() ,
startPoint.z + tempPnt.Z() );
// calculate outer section point by transforming origin
tempPnt = endTransformation.Transform(gp_Pnt(0.0, 0.0, 0.0));
endPoint.x = tempPnt.X();
endPoint.y = tempPnt.Y();
endPoint.z = tempPnt.Z();
}
// Returns the positioning matrix for a given section index
CTiglTransformation CCPACSWingPositionings::GetPositioningTransformation(std::string sectionIndex)
{
Update();
CCPACSWingPositioningIterator iter = positionings.find(sectionIndex);
// check, if section has positioning definition, if not
// return Zero-Transformation
if (iter == positionings.end()){
CTiglTransformation zeroTrans;
zeroTrans.SetIdentity();
return zeroTrans;
}
return iter->second->GetOuterTransformation();
}