//! calculate the section Normal/Projection Direction given baseView projection direction and section name
Base::Vector3d DrawViewSection::getSectionVector (const std::string sectionName)
{
Base::Vector3d result;
Base::Vector3d stdX(1.0,0.0,0.0);
Base::Vector3d stdY(0.0,1.0,0.0);
Base::Vector3d stdZ(0.0,0.0,1.0);
double adjustAngle = 0.0;
if (getBaseDPGI() != nullptr) {
adjustAngle = getBaseDPGI()->getRotateAngle();
}
Base::Vector3d view = getBaseDVP()->Direction.getValue();
view.Normalize();
Base::Vector3d left = view.Cross(stdZ);
left.Normalize();
Base::Vector3d up = view.Cross(left);
up.Normalize();
double dot = view.Dot(stdZ);
if (sectionName == "Up") {
result = up;
if (DrawUtil::fpCompare(dot,1.0)) { //view = stdZ
result = (-1.0 * stdY);
} else if (DrawUtil::fpCompare(dot,-1.0)) { //view = -stdZ
result = stdY;
}
} else if (sectionName == "Down") {
result = up * -1.0;
if (DrawUtil::fpCompare(dot,1.0)) { //view = stdZ
result = stdY;
} else if (DrawUtil::fpCompare(dot, -1.0)) { //view = -stdZ
result = (-1.0 * stdY);
}
} else if (sectionName == "Left") {
result = left * -1.0;
if (DrawUtil::fpCompare(fabs(dot),1.0)) { //view = +/- stdZ
result = stdX;
}
} else if (sectionName == "Right") {
result = left;
if (DrawUtil::fpCompare(fabs(dot),1.0)) {
result = -1.0 * stdX;
}
} else {
Base::Console().Log("Error - DVS::getSectionVector - bad sectionName: %s\n",sectionName.c_str());
result = stdZ;
}
Base::Vector3d adjResult = DrawUtil::vecRotate(result,adjustAngle,view);
return adjResult;
}
/// utility non-class member functions
//! gets a coordinate system that matches view system used in 3D with +Z up (or +Y up if neccessary)
//! used for individual views, but not secondary views in projection groups
gp_Ax2 TechDrawGeometry::getViewAxis(const Base::Vector3d origin,
const Base::Vector3d& direction,
const bool flip)
{
gp_Pnt inputCenter(origin.x,origin.y,origin.z);
Base::Vector3d stdZ(0.0,0.0,1.0);
Base::Vector3d flipDirection(direction.x,-direction.y,direction.z);
if (!flip) {
flipDirection = Base::Vector3d(direction.x,direction.y,direction.z);
}
Base::Vector3d cross = flipDirection;
//special cases
if (flipDirection == stdZ) {
cross = Base::Vector3d(1.0,0.0,0.0);
} else if (flipDirection == (stdZ * -1.0)) {
cross = Base::Vector3d(1.0,0.0,0.0);
} else {
cross.Normalize();
cross = cross.Cross(stdZ);
}
gp_Ax2 viewAxis;
viewAxis = gp_Ax2(inputCenter,
gp_Dir(flipDirection.x, flipDirection.y, flipDirection.z),
// gp_Dir(1.0, 1.0, 0.0));
gp_Dir(cross.x, cross.y, cross.z));
return viewAxis;
}