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Part: Add midpoint attachement mode

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This adds midpoint attachement mode to Attacher. It works just like
method for finding placement of JCS in Assembly.
This commit is contained in:
Kacper Donat
2024-11-11 17:59:07 +01:00
parent 49ff7b8bf0
commit 88141d6dce
6 changed files with 155 additions and 11 deletions
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80
src/Mod/Part/App/Attacher.cpp
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@@ -69,6 +69,8 @@
#include "AttachExtension.h"
#include "Tools.h"
#include <Geometry.h>
using namespace Part;
using namespace Attacher;
@@ -136,6 +138,7 @@ const char* AttachEngine::eMapModeStrings[]= {
"OYX",
"ParallelPlane",
"MidPoint",
nullptr};
@@ -1895,6 +1898,83 @@ AttachEngine3D::_calculateAttachedPlacement(const std::vector<App::DocumentObjec
plm *= this->attachmentOffset;
return plm;
} break;
case mmMidpoint: {
Base::Placement placement;
auto shape = shapes.front();
auto geom = Geometry::fromShape(shape->getShape());
switch (shape->shapeType()) {
case TopAbs_VERTEX: {
if (auto point = dynamic_cast<GeomPoint*>(geom.get())) {
placement.setPosition(point->getPoint());
}
}
break;
case TopAbs_EDGE: {
if (auto conic = dynamic_cast<GeomConic*>(geom.get())) {
placement.setPosition(conic->getLocation());
placement.setRotation(conic->getRotation().value_or(Base::Rotation {}));
} else if (auto line = dynamic_cast<GeomCurve*>(geom.get())) {
auto u1 = line->getFirstParameter();
auto u2 = line->getLastParameter();
auto middle = (u1 + u2) / 2;
placement.setPosition(line->pointAtParameter(middle));
Base::Vector3d direction;
if (!line->normalAt(middle, direction)) {
line->tangent(middle, direction);
}
placement.setRotation(Base::Rotation::fromNormalVector(-direction));
}
}
break;
case TopAbs_FACE: {
auto surface = dynamic_cast<GeomSurface*>(geom.get());
if (auto sphere = dynamic_cast<GeomSphere*>(geom.get())) {
placement.setPosition(sphere->getLocation());
} else if (auto cone = dynamic_cast<GeomCone*>(geom.get())) {
placement.setPosition(cone->getApex());
} else {
placement.setPosition(shape->centerOfGravity().value());
}
if (auto rotation = surface->getRotation()) {
placement.setRotation(*rotation);
} else {
auto adaptorSurface = BRepAdaptor_Surface(TopoDS::Face(shape->getShape()), true);
auto u1 = adaptorSurface.FirstUParameter();
auto u2 = adaptorSurface.LastUParameter();
auto v1 = adaptorSurface.FirstVParameter();
auto v2 = adaptorSurface.LastVParameter();
// calculate the normal at midpoint of the surface and use it as Z axis
gp_Dir dir;
surface->normal((u1 + u2) / 2, (v1 + v2) / 2, dir);
placement.setRotation(Base::Rotation::fromNormalVector(Base::convertTo<Base::Vector3d>(-dir)));
}
}
break;
default:
THROWM(Base::TypeError,
"AttachEngine3D::calculateAttachedPlacement: Unsupported shape type, "
"must be one of: Vertex, Edge, Face");
break;
}
return placement * attachmentOffset;
break;
}
default:
throwWrongMode(mmode);
} // switch (MapMode)