/********************************************************************************
* *
* This file is part of IfcOpenShell. *
* *
* IfcOpenShell is free software: you can redistribute it and/or modify *
* it under the terms of the Lesser GNU General Public License as published by *
* the Free Software Foundation, either version 3.0 of the License, or *
* (at your option) any later version. *
* *
* IfcOpenShell is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* Lesser GNU General Public License for more details. *
* *
* You should have received a copy of the Lesser GNU General Public License *
* along with this program. If not, see . *
* *
********************************************************************************/
/********************************************************************************
* *
* Implementations of the various conversion functions defined in IfcRegister.h *
* *
********************************************************************************/
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#include "../ifcgeom/IfcGeom.h"
bool IfcGeom::Kernel::convert(const IfcSchema::IfcCircle* l, Handle(Geom_Curve)& curve) {
const double r = l->Radius() * getValue(GV_LENGTH_UNIT);
if ( r < ALMOST_ZERO ) {
Logger::Message(Logger::LOG_ERROR, "Radius not greater than zero for:", l->entity);
return false;
}
gp_Trsf trsf;
IfcSchema::IfcAxis2Placement* placement = l->Position();
if (placement->is(IfcSchema::Type::IfcAxis2Placement3D)) {
IfcGeom::Kernel::convert((IfcSchema::IfcAxis2Placement3D*)placement,trsf);
} else {
gp_Trsf2d trsf2d;
IfcGeom::Kernel::convert((IfcSchema::IfcAxis2Placement2D*)placement,trsf2d);
trsf = trsf2d;
}
gp_Ax2 ax = gp_Ax2().Transformed(trsf);
curve = new Geom_Circle(ax, r);
return true;
}
bool IfcGeom::Kernel::convert(const IfcSchema::IfcEllipse* l, Handle(Geom_Curve)& curve) {
double x = l->SemiAxis1() * getValue(GV_LENGTH_UNIT);
double y = l->SemiAxis2() * getValue(GV_LENGTH_UNIT);
if (x < ALMOST_ZERO || y < ALMOST_ZERO) {
Logger::Message(Logger::LOG_ERROR, "Radius not greater than zero for:", l->entity);
return false;
}
// Open Cascade does not allow ellipses of which the minor radius
// is greater than the major radius. Hence, in this case, the
// ellipse is rotated. Note that special care needs to be taken
// when creating a trimmed curve off of an ellipse like this.
const bool rotated = y > x;
gp_Trsf trsf;
IfcSchema::IfcAxis2Placement* placement = l->Position();
if (placement->is(IfcSchema::Type::IfcAxis2Placement3D)) {
convert((IfcSchema::IfcAxis2Placement3D*)placement,trsf);
} else {
gp_Trsf2d trsf2d;
convert((IfcSchema::IfcAxis2Placement2D*)placement,trsf2d);
trsf = trsf2d;
}
gp_Ax2 ax = gp_Ax2();
if (rotated) {
ax.Rotate(ax.Axis(), M_PI / 2.);
std::swap(x, y);
}
ax.Transform(trsf);
curve = new Geom_Ellipse(ax, x, y);
return true;
}
bool IfcGeom::Kernel::convert(const IfcSchema::IfcLine* l, Handle(Geom_Curve)& curve) {
gp_Pnt pnt;gp_Vec vec;
convert(l->Pnt(),pnt);
convert(l->Dir(),vec);
// See note at IfcGeomWires.cpp:237
curve = new Geom_Line(pnt,vec);
return true;
}