Esempio n. 1
0
//! 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;
}