ObjectARX, AutoCAD. Среда программирования библиотеки C++
Пересечение с Другими примитивами - часть 3
&projPlane, points)) != Acad::eOk)
{
return es;
}
} else if (ent->isKindOf(AcDbCircle::desc())) {
if ((es = intCircle(this, AcDbCircle::cast(ent),
intType, &projPlane, points)) != Acad::eOk)
{
return es;
}
} else if (ent->isKindOf(AcDb2dPolyline::desc())) {
if ((es = intPline(this, AcDb2dPolyline::cast(ent),
intType, &projPlane, points)) != Acad::eOk)
{
return es;
}
} else if (ent->isKindOf(AcDb3dPolyline::desc())) {
if ((es = intPline(this, AcDb3dPolyline::cast(ent),
intType, &projPlane, points)) != Acad::eOk)
{
return es;
}
} else {
AcGePoint3dArray vertexArray;
if ((es = getVertices3d(vertexArray))
!= Acad::eOk)
{
return es;
}
if (intType == AcDb::kExtendArg
|| intType == AcDb::kExtendBoth)
{
intType = AcDb::kExtendThis;
}
AcDbLine *pAcadLine;
for (int i = 0; i < vertexArray.length() - 1; i++) {
pAcadLine = new AcDbLine();
pAcadLine->setStartPoint(vertexArray[i]);
pAcadLine->setEndPoint(vertexArray[i + 1]);
pAcadLine->setNormal(normal());
if ((es = ent->intersectWith(pAcadLine, intType,
projPlane, points)) != Acad::eOk)
{
delete pAcadLine;
return es;
}
delete pAcadLine;
}
// All the points that we selected in this process are on
// the other curve; we are dealing with apparent
// intersection. If the other curve is 3D or is not
// on the same plane as poly, the points are not on
// poly.
//
// In this case, we need to do some more work. Project the
// points back onto the plane. They should lie on
// the projected poly. Find points on real poly
// corresponding to the projected points.
//
AcGePoint3d projPt, planePt;
AcGePoint3dArray pts;
AcGeLine3d line;
AcGePlane polyPlane;
AcDb::Planarity plnrty;
getPlane(polyPlane,plnrty);
for (i = 0; i < points.length(); i++) {
// Define a line starting from the projPt and
// along the normal. Intersect the polygon with
// that line. Find all the points and pick the
// one closest to the given point.
//
projPt = points[i].orthoProject(projPlane);
line.set(projPt, projPlane.normal());
if ((es = intLine(this, line, pts))
!= Acad::eOk)
{
return es;
}
planePt = projPt.project(polyPlane,
projPlane.normal());
points[i] = pts[0];
double length = (planePt - pts[0]).length();
double length2;
for (int j = 1; j < pts.length(); j++) {
if ((length2 = (planePt - pts[j]).length())
< length)
{
points[i] = pts[j];
length = length2;
}
}
}
}
return es;
}
