gp_Pnt GetCentralFacePoint(const TopoDS_Face& face)
{
// compute point on face
Standard_Real umin, umax, vmin, vmax;
gp_Pnt p;
Handle(Geom_Surface) surface = BRep_Tool::Surface(face);
BRepTools::UVBounds(face, umin, umax, vmin, vmax);
Standard_Real umean = 0.5*(umin+umax);
Standard_Real vmean = 0.5*(vmin+vmax);
// compute intersection of u-iso line with face boundaries
Handle(Geom2d_Curve) uiso = new Geom2d_Line(
gp_Pnt2d(umean,0.),
gp_Dir2d(0., 1.)
);
TopExp_Explorer exp (face,TopAbs_EDGE);
std::list<double> intersections;
for (; exp.More(); exp.Next()) {
TopoDS_Edge edge = TopoDS::Edge(exp.Current());
Standard_Real first, last;
// Get geomteric curve from edge
Handle(Geom2d_Curve) hcurve = BRep_Tool::CurveOnSurface(edge, face, first, last);
hcurve = new Geom2d_TrimmedCurve(hcurve, first, last);
Geom2dAPI_InterCurveCurve intersector(uiso, hcurve);
for (int ipoint = 0; ipoint < intersector.NbPoints(); ++ipoint) {
gp_Pnt2d p = intersector.Point(ipoint+1);
intersections.push_back(p.Y());
}
}
// remove duplicate solutions defined by tolerance
double tolerance = 1e-5;
intersections.sort();
intersections.unique(IsSame((vmax-vmin)*tolerance));
// normally we should have at least two intersections
// also the number of sections should be even - else something is really strange
//assert(intersections.size() % 2 == 0);
if (intersections.size() >= 2) {
std::list<double>::iterator it = intersections.begin();
double int1 = *it++;
double int2 = *it;
vmean = (int1 + int2)/2.;
}
surface->D0(umean, vmean, p);
return p;
}
bool IfcGeom::convert(const Ifc2x3::IfcAxis2Placement2D::ptr l, gp_Trsf2d& trsf) {
IN_CACHE(IfcAxis2Placement2D,l,gp_Trsf2d,trsf)
gp_Pnt P; gp_Dir V (1,0,0);
IfcGeom::convert(l->Location(),P);
if ( l->hasRefDirection() )
IfcGeom::convert(l->RefDirection(),V);
gp_Ax2d axis(gp_Pnt2d(P.X(),P.Y()),gp_Dir2d(V.X(),V.Y()));
trsf.SetTransformation(axis,gp_Ax2d());
CACHE(IfcAxis2Placement2D,l,trsf)
return true;
}
bool IfcGeom::convert(const Ifc2x3::IfcCartesianTransformationOperator2D::ptr l, gp_Trsf2d& trsf) {
IN_CACHE(IfcCartesianTransformationOperator2D,l,gp_Trsf2d,trsf)
gp_Pnt origin;
IfcGeom::convert(l->LocalOrigin(),origin);
gp_Dir axis1 (1.,0.,0.);
if ( l->hasAxis1() ) IfcGeom::convert(l->Axis1(),axis1);
const gp_Ax2d ax2d (gp_Pnt2d(origin.X(),origin.Y()),gp_Dir2d(axis1.X(),axis1.Y()));
trsf.SetTransformation(ax2d);
trsf.Invert();
if ( l->hasScale() ) trsf.SetScaleFactor(l->Scale());
CACHE(IfcCartesianTransformationOperator2D,l,trsf)
return true;
}
bool IfcGeom::convert(const Ifc2x3::IfcCartesianTransformationOperator2DnonUniform::ptr l, gp_GTrsf2d& gtrsf) {
IN_CACHE(IfcCartesianTransformationOperator2DnonUniform,l,gp_GTrsf2d,gtrsf)
gp_Trsf2d trsf;
gp_Pnt origin;
IfcGeom::convert(l->LocalOrigin(),origin);
gp_Dir axis1 (1.,0.,0.);
if ( l->hasAxis1() ) IfcGeom::convert(l->Axis1(),axis1);
const gp_Ax2d ax2d (gp_Pnt2d(origin.X(),origin.Y()),gp_Dir2d(axis1.X(),axis1.Y()));
trsf.SetTransformation(ax2d);
trsf.Invert();
const double scale1 = l->hasScale() ? l->Scale() : 1.0f;
const double scale2 = l->hasScale2() ? l->Scale2() : scale1;
gtrsf = gp_GTrsf2d();
gtrsf.SetValue(1,1,scale1);
gtrsf.SetValue(2,2,scale2);
gtrsf.Multiply(trsf);
CACHE(IfcCartesianTransformationOperator2DnonUniform,l,gtrsf)
return true;
}
// Returns an upper or lower point on the wing profile in
// dependence of parameter xsi, which ranges from 0.0 to 1.0.
// For xsi = 0.0 point is equal to leading edge, for xsi = 1.0
// point is equal to trailing edge. If fromUpper is true, a point
// on the upper profile is returned, otherwise from the lower.
gp_Pnt CCPACSWingProfile::GetPoint(double xsi, bool fromUpper)
{
Update();
if (xsi < 0.0 || xsi > 1.0) {
throw CTiglError("Error: Parameter xsi not in the range 0.0 <= xsi <= 1.0 in CCPACSWingProfile::GetPoint", TIGL_ERROR);
}
if (xsi < Precision::Confusion()) {
return GetLEPoint();
}
if ((1.0 - xsi) < Precision::Confusion()) {
return GetTEPoint();
}
gp_Pnt chordPoint3d = GetChordPoint(xsi);
gp_Pnt2d chordPoint2d(chordPoint3d.X(), chordPoint3d.Z());
gp_Pnt le3d = GetLEPoint();
gp_Pnt te3d = GetTEPoint();
gp_Pnt2d le2d(le3d.X(), le3d.Z());
gp_Pnt2d te2d(te3d.X(), te3d.Z());
// Normal vector on chord line
gp_Vec2d normalVec2d(-(le2d.Y() - te2d.Y()), (le2d.X() - te2d.X()));
// Compute 2d line normal to chord line
Handle(Geom2d_Line) line2d = new Geom2d_Line(chordPoint2d, gp_Dir2d(normalVec2d));
// Define xz-plane for curve projection
gp_Pln xzPlane = gce_MakePln(gp_Pnt(0.0, 0.0, 0.0), gp_Pnt(1.0, 0.0, 0.0), gp_Pnt(0.0, 0.0, 1.0));
// Loop over all edges of the wing profile curve and try to find intersection points
std::vector<gp_Pnt2d> ipnts2d;
TopoDS_Edge edge;
if (fromUpper) {
edge = GetUpperWire();
}
else {
edge = GetLowerWire();
}
Standard_Real firstParam;
Standard_Real lastParam;
// get curve and trim it - trimming is important, else it will be infinite
Handle(Geom_Curve) curve3d = BRep_Tool::Curve(edge, firstParam, lastParam);
curve3d = new Geom_TrimmedCurve(curve3d, firstParam, lastParam);
// Convert 3d curve to 2d curve lying in the xz-plane
Handle(Geom2d_Curve) curve2d = GeomAPI::To2d(curve3d, xzPlane);
// Check if there are intersection points between line2d and curve2d
Geom2dAPI_InterCurveCurve intersection(line2d, curve2d);
for (int n = 1; n <= intersection.NbPoints(); n++) {
ipnts2d.push_back(intersection.Point(n));
}
if (ipnts2d.size() == 1) {
// There is only one intesection point with the wire
gp_Pnt2d ipnt2d = ipnts2d[0];
gp_Pnt ipnt3d(ipnt2d.X(), 0.0, ipnt2d.Y());
return ipnt3d;
}
else if (ipnts2d.size() > 1) {
// There are one or more intersection points with the wire. Find the
// points with the minimum and maximum y-values.
gp_Pnt2d minYPnt2d = ipnts2d[0];
gp_Pnt2d maxYPnt2d = minYPnt2d;
for (std::vector<gp_Pnt2d>::size_type i = 1; i < ipnts2d.size(); i++) {
gp_Pnt2d currPnt2d = ipnts2d[i];
if (currPnt2d.Y() < minYPnt2d.Y()) {
minYPnt2d = currPnt2d;
}
if (currPnt2d.Y() > maxYPnt2d.Y()) {
maxYPnt2d = currPnt2d;
}
}
gp_Pnt maxYPnt3d(maxYPnt2d.X(), 0.0, maxYPnt2d.Y());
gp_Pnt minYPnt3d(minYPnt2d.X(), 0.0, minYPnt2d.Y());
if (fromUpper) {
return maxYPnt3d;
}
return minYPnt3d;
}
throw CTiglError("Error: No intersection point found in CCPACSWingProfile::GetPoint", TIGL_NOT_FOUND);
}
//=======================================================================
// profile
// command to build a profile
//=======================================================================
Sketcher_Profile::Sketcher_Profile(const char* aCmd)
{
enum {line, circle, point, none} move;
Standard_Integer i = 1;
Standard_Real x0, y0, x, y, dx, dy;
x0 = y0 = x = y = dy = 0;
dx = 1;
Standard_Boolean first, stayfirst, face, close;
first = Standard_True;
stayfirst = face = close = Standard_False;
Standard_Integer reversed = 0;
Standard_Integer control_Tolerance = 0;
TopoDS_Shape S;
TopoDS_Vertex MP;
BRepBuilderAPI_MakeWire MW;
gp_Ax3 DummyHP(gp::XOY());
gp_Pln P(DummyHP);
TopLoc_Location TheLocation;
Handle(Geom_Surface) Surface;
myOK = Standard_False;
myError = 0;
//TCollection_AsciiString aCommand(CORBA::string_dup(aCmd));
TCollection_AsciiString aCommand ((char*)aCmd);
TCollection_AsciiString aToken = aCommand.Token(":", 1);
int n = 0;
// porting to WNT
TColStd_Array1OfAsciiString aTab (0, aCommand.Length() - 1);
if ( aCommand.Length() )
{
while(aToken.Length() != 0) {
if(aCommand.Token(":", n + 1).Length() > 0)
aTab(n) = aCommand.Token(":", n + 1);
aToken = aCommand.Token(":", ++n);
}
n = n - 1;
}
if ( aTab.Length() && aTab(0).Length() )
while(i < n) {
Standard_Real length = 0, radius = 0, angle = 0;
move = point;
int n1 = 0;
TColStd_Array1OfAsciiString a (0, aTab(0).Length());
aToken = aTab(i).Token(" ", 1);
while (aToken.Length() != 0) {
if (aTab(i).Token(" ", n1 + 1).Length() > 0)
a(n1) = aTab(i).Token(" ", n1 + 1);
aToken = aTab(i).Token(" ", ++n1);
}
n1 = n1 - 1;
switch(a(0).Value(1))
{
case 'F':
{
if (n1 != 3) goto badargs;
if (!first) {
MESSAGE("profile : The F instruction must precede all moves");
return;
}
x0 = x = a(1).RealValue();
y0 = y = a(2).RealValue();
stayfirst = Standard_True;
break;
}
case 'O':
{
if (n1 != 4) goto badargs;
P.SetLocation(gp_Pnt(a(1).RealValue(), a(2).RealValue(), a(3).RealValue()));
stayfirst = Standard_True;
break;
}
case 'P':
{
if (n1 != 7) goto badargs;
gp_Vec vn(a(1).RealValue(), a(2).RealValue(), a(3).RealValue());
gp_Vec vx(a(4).RealValue(), a(5).RealValue(), a(6).RealValue());
if (vn.Magnitude() <= Precision::Confusion() || vx.Magnitude() <= Precision::Confusion()) {
MESSAGE("profile : null direction");
return;
}
gp_Ax2 ax(P.Location(), vn, vx);
P.SetPosition(ax);
stayfirst = Standard_True;
break;
}
case 'X':
{
if (n1 != 2) goto badargs;
length = a(1).RealValue();
if (a(0) == "XX")
length -= x;
dx = 1; dy = 0;
move = line;
break;
}
case 'Y':
{
if (n1 != 2) goto badargs;
length = a(1).RealValue();
if (a(0) == "YY")
length -= y;
dx = 0; dy = 1;
move = line;
break;
}
case 'L':
{
if (n1 != 2) goto badargs;
length = a(1).RealValue();
if (Abs(length) > Precision::Confusion())
move = line;
else
move = none;
break;
}
case 'T':
{
if (n1 != 3) goto badargs;
Standard_Real vx = a(1).RealValue();
Standard_Real vy = a(2).RealValue();
if (a(0) == "TT") {
vx -= x;
vy -= y;
}
length = Sqrt(vx * vx + vy * vy);
if (length > Precision::Confusion()) {
move = line;
dx = vx / length;
dy = vy / length;
}
else
move = none;
break;
}
case 'R':
{
if (n1 != 2) goto badargs;
angle = a(1).RealValue() * PI180;
if (a(0) == "RR") {
dx = Cos(angle);
dy = Sin(angle);
}
else {
Standard_Real c = Cos(angle);
Standard_Real s = Sin(angle);
Standard_Real t = c * dx - s * dy;
dy = s * dx + c * dy;
dx = t;
}
break;
}
case 'D':
{
if (n1 != 3) goto badargs;
Standard_Real vx = a(1).RealValue();
Standard_Real vy = a(2).RealValue();
length = Sqrt(vx * vx + vy * vy);
if (length > Precision::Confusion()) {
dx = vx / length;
dy = vy / length;
}
else
move = none;
break;
}
case 'C':
{
if (n1 != 3) goto badargs;
radius = a(1).RealValue();
if (Abs(radius) > Precision::Confusion()) {
angle = a(2).RealValue() * PI180;
move = circle;
}
else
move = none;
break;
}
case 'A': // TAngential arc by end point
{
if (n1 != 3) goto badargs;
Standard_Real vx = a(1).RealValue();
Standard_Real vy = a(2).RealValue();
if (a(0) == "AA") {
vx -= x;
vy -= y;
}
Standard_Real det = dx * vy - dy * vx;
if ( Abs(det) > Precision::Confusion()) {
Standard_Real c = (dx * vx + dy * vy)
/ Sqrt((dx * dx + dy * dy) * (vx * vx + vy * vy)); // Cosine of alpha = arc of angle / 2 , alpha in [0,Pi]
radius = (vx * vx + vy * vy)* Sqrt(dx * dx + dy * dy) // radius = distance between start and end point / 2 * sin(alpha)
/ (2.0 * det); // radius is > 0 or < 0
if (Abs(radius) > Precision::Confusion()) {
angle = 2.0 * acos(c); // angle in [0,2Pi]
move = circle;
}
else
move = none;
break;
}
else
move = none;
break;
}
case 'U': // Arc by end point and radiUs
{
if (n1 != 5) goto badargs;
Standard_Real vx = a(1).RealValue();
Standard_Real vy = a(2).RealValue();
radius = a(3).RealValue();
reversed = a(4).IntegerValue();
if (a(0) == "UU") { // Absolute
vx -= x;
vy -= y;
}
Standard_Real length = Sqrt(vx * vx + vy * vy);
if ( (4.0 - (vx * vx + vy * vy) / (radius * radius) >= 0.0 ) && (length > Precision::Confusion()) ) {
Standard_Real c = 0.5 * Sqrt(4.0 - (vx * vx + vy * vy) / (radius * radius)); // Cosine of alpha = arc angle / 2 , alpha in [0,Pi/2]
angle = 2.0 * acos(c); // angle in [0,Pi]
if ( reversed == 2 )
angle = angle - 2 * PI;
dx = 0.5 * ( vy * 1.0/radius
+ vx * Sqrt(4.0 / (vx * vx + vy * vy) - 1.0 / (radius * radius)));
dy = - 0.5 * ( vx * 1.0/radius
- vy * Sqrt(4.0 / (vx * vx + vy * vy) - 1.0 / (radius * radius)));
move = circle;
}
else{
move = none;
}
break;
}
case 'E': // Arc by end point and cEnter
{
if (n1 != 7) goto badargs;
Standard_Real vx = a(1).RealValue();
Standard_Real vy = a(2).RealValue();
Standard_Real vxc = a(3).RealValue();
Standard_Real vyc = a(4).RealValue();
reversed = a(5).IntegerValue();
control_Tolerance = a(6).IntegerValue();
if (a(0) == "EE") { // Absolute
vx -= x;
vy -= y;
vxc -= x;
vyc -= y;
}
radius = Sqrt( vxc * vxc + vyc * vyc );
Standard_Real det = vx * vyc - vy * vxc;
Standard_Real length = Sqrt(vx * vx + vy * vy);
Standard_Real length2 = Sqrt((vx-vxc) * (vx-vxc) + (vy-vyc) * (vy-vyc));
Standard_Real length3 = Sqrt(vxc * vxc + vyc * vyc);
Standard_Real error = Abs(length2 - radius);
myError = error;
if ( error > Precision::Confusion() ){
MESSAGE("Warning : The specified end point is not on the Arc, distance = "<<error);
}
if ( error > Precision::Confusion() && control_Tolerance == 1) // Don't create the arc if the end point
move = none; // is too far from it
else if ( (length > Precision::Confusion()) &&
(length2 > Precision::Confusion()) &&
(length3 > Precision::Confusion()) ) {
Standard_Real c = ( radius * radius - (vx * vxc + vy * vyc) )
/ ( radius * Sqrt((vx-vxc) * (vx-vxc) + (vy-vyc) * (vy-vyc)) ) ; // Cosine of arc angle
angle = acos(c); // angle in [0,Pi]
if ( reversed == 2 )
angle = angle - 2 * PI;
if (det < 0)
angle = -angle;
dx = vyc / radius;
dy = -vxc / radius;
move = circle;
}
else {
move = none;
}
break;
}
case 'I':
{
if (n1 != 2) goto badargs;
length = a(1).RealValue();
if (a(0) == "IX") {
if (Abs(dx) < Precision::Confusion()) {
MESSAGE("profile : cannot intersect, arg "<<i-1);
return;
}
length = (length - x) / dx;
}
else if (a(0) == "IY") {
if (Abs(dy) < Precision::Confusion()) {
MESSAGE("profile : cannot intersect, arg "<<i-1);
return;
}
length = (length - y) / dy;
}
if (Abs(length) > Precision::Confusion())
move = line;
else
move = none;
break;
}
case 'W':
{
if (a(0) == "WW")
close = Standard_True;
else if(a(0) == "WF") {
close = Standard_True;
face = Standard_True;
}
i = n - 1;
break;
}
default:
{
MESSAGE("profile : unknown code " << a(i));
return;
}
}
again :
switch (move)
{
case line :
{
if (length < 0) {
length = -length;
dx = -dx;
dy = -dy;
}
Handle(Geom2d_Line) l = new Geom2d_Line(gp_Pnt2d(x,y),gp_Dir2d(dx,dy));
BRepBuilderAPI_MakeEdge ME (GeomAPI::To3d(l,P),0,length);
if (!ME.IsDone())
return;
MW.Add(ME);
x += length*dx;
y += length*dy;
break;
}
case circle :
{
Standard_Boolean sense = Standard_True;
if (radius < 0) {
radius = -radius;
sense = !sense;
dx = -dx;
dy = -dy;
}
gp_Ax2d ax(gp_Pnt2d(x-radius*dy,y+radius*dx),gp_Dir2d(dy,-dx));
if (angle < 0) {
angle = -angle;
sense = !sense;
}
Handle(Geom2d_Circle) c = new Geom2d_Circle(ax,radius,sense);
BRepBuilderAPI_MakeEdge ME (GeomAPI::To3d(c,P),0,angle);
if (!ME.IsDone())
return;
MW.Add(ME);
gp_Pnt2d p;
gp_Vec2d v;
c->D1(angle,p,v);
x = p.X();
y = p.Y();
dx = v.X() / radius;
dy = v.Y() / radius;
break;
}
case point:
{
MP = BRepBuilderAPI_MakeVertex(gp_Pnt(x, y, 0.0));
break;
}
case none:
{
i = n - 1;
break;
}
}
// update first
first = stayfirst;
stayfirst = Standard_False;
if(!(dx == 0 && dy == 0))
myLastDir.SetCoord(dx, dy, 0.0);
else
return;
myLastPoint.SetX(x);
myLastPoint.SetY(y);
// next segment....
i++;
if ((i == n) && close) {
// the closing segment
dx = x0 - x;
dy = y0 - y;
length = Sqrt(dx * dx + dy * dy);
move = line;
if (length > Precision::Confusion()) {
dx = dx / length;
dy = dy / length;
goto again;
}
}
}
// get the result, face or wire
if (move == none) {
return;
} else if (move == point) {
S = MP;
} else if (face) {
if (!MW.IsDone()) {
return;
}
BRepBuilderAPI_MakeFace MF (P, MW.Wire());
if (!MF.IsDone()) {
return;
}
S = MF;
} else {
if (!MW.IsDone()) {
return;
}
S = MW;
}
if(!TheLocation.IsIdentity())
S.Move(TheLocation);
myShape = S;
myOK = true;
return;
badargs :
MESSAGE("profile : bad number of arguments");
return;
}
