C++ Entity::FaceGetNormalNum方法代码示例

//.........这里部分代码省略.........
                break;

            case Entity::ARC_OF_CIRCLE: {
                Printf(false, "%FtARC OF A CIRCLE%E");
                p = SK.GetEntity(e->point[0])->PointGetNum();
                Printf(true,  "     center = " PT_AS_STR, COSTR(p));
                p = SK.GetEntity(e->point[1])->PointGetNum();
                Printf(true,  "  endpoints = " PT_AS_STR, COSTR(p));
                p = SK.GetEntity(e->point[2])->PointGetNum();
                Printf(false, "              " PT_AS_STR, COSTR(p));
                double r = e->CircleGetRadiusNum();
                Printf(true, "   diameter =  %Fi%s", SS.MmToString(r*2));
                Printf(false, "     radius =  %Fi%s", SS.MmToString(r));
                double thetas, thetaf, dtheta;
                e->ArcGetAngles(&thetas, &thetaf, &dtheta);
                Printf(false, "    arc len =  %Fi%s", SS.MmToString(dtheta*r));
                break;
            }
            case Entity::CIRCLE: {
                Printf(false, "%FtCIRCLE%E");
                p = SK.GetEntity(e->point[0])->PointGetNum();
                Printf(true,  "     center = " PT_AS_STR, COSTR(p));
                double r = e->CircleGetRadiusNum();
                Printf(true,  "   diameter =  %Fi%s", SS.MmToString(r*2));
                Printf(false, "     radius =  %Fi%s", SS.MmToString(r));
                break;
            }
            case Entity::FACE_NORMAL_PT:
            case Entity::FACE_XPROD:
            case Entity::FACE_N_ROT_TRANS:
            case Entity::FACE_N_ROT_AA:
            case Entity::FACE_N_TRANS:
                Printf(false, "%FtPLANE FACE%E");
                p = e->FaceGetNormalNum();
                Printf(true,  "   normal = " PT_AS_NUM, CO(p));
                p = e->FaceGetPointNum();
                Printf(false, "     thru = " PT_AS_STR, COSTR(p));
                break;

            case Entity::TTF_TEXT: {
                Printf(false, "%FtTRUETYPE FONT TEXT%E");
                Printf(true, "  font = '%Fi%s%E'", e->font.str);
                if(e->h.isFromRequest()) {
                    Printf(false, "  text = '%Fi%s%E' %Fl%Ll%f%D[change]%E",
                        e->str.str, &ScreenEditTtfText, e->h.request());
                    Printf(true, "  select new font");
                    SS.fonts.LoadAll();
                    int i;
                    for(i = 0; i < SS.fonts.l.n; i++) {
                        TtfFont *tf = &(SS.fonts.l.elem[i]);
                        if(strcmp(e->font.str, tf->FontFileBaseName())==0) {
                            Printf(false, "%Bp    %s",
                                (i & 1) ? 'd' : 'a',
                                tf->name.str);
                        } else {
                            Printf(false, "%Bp    %f%D%Fl%Ll%s%E%Bp",
                                (i & 1) ? 'd' : 'a',
                                &ScreenSetTtfFont, i,
                                tf->name.str,
                                (i & 1) ? 'd' : 'a');
                        }
                    }
                } else {
                    Printf(false, "  text = '%Fi%s%E'", e->str.str);
                }
                break;

void Constraint::DrawOrGetDistance(Vector *labelPos) {
    if(!SS.GW.showConstraints) return;
    Group *g = SK.GetGroup(group);
    // If the group is hidden, then the constraints are hidden and not
    // able to be selected.
    if(!(g->visible)) return;
    // And likewise if the group is not the active group; except for comments
    // with an assigned style.
    if(g->h.v != SS.GW.activeGroup.v && !(type == COMMENT && disp.style.v)) {
        return;
    }
    if(disp.style.v) {
        Style *s = Style::Get(disp.style);
        if(!s->visible) return;
    }

    // Unit vectors that describe our current view of the scene. One pixel
    // long, not one actual unit.
    Vector gr = SS.GW.projRight.ScaledBy(1/SS.GW.scale);
    Vector gu = SS.GW.projUp.ScaledBy(1/SS.GW.scale);
    Vector gn = (gr.Cross(gu)).WithMagnitude(1/SS.GW.scale);

    switch(type) {
        case PT_PT_DISTANCE: {
            Vector ap = SK.GetEntity(ptA)->PointGetNum();
            Vector bp = SK.GetEntity(ptB)->PointGetNum();

            if(workplane.v != Entity::FREE_IN_3D.v) {
                DoProjectedPoint(&ap);
                DoProjectedPoint(&bp);
            }

            Vector ref = ((ap.Plus(bp)).ScaledBy(0.5)).Plus(disp.offset);

            DoLineWithArrows(ref, ap, bp, false);
            DoLabel(ref, labelPos, gr, gu);
            break;
        }

        case PROJ_PT_DISTANCE: {
            Vector ap = SK.GetEntity(ptA)->PointGetNum(),
                   bp = SK.GetEntity(ptB)->PointGetNum(),
                   dp = (bp.Minus(ap)),
                   pp = SK.GetEntity(entityA)->VectorGetNum();

            Vector ref = ((ap.Plus(bp)).ScaledBy(0.5)).Plus(disp.offset);

            pp = pp.WithMagnitude(1);
            double d = dp.Dot(pp);
            Vector bpp = ap.Plus(pp.ScaledBy(d));
            StippledLine(ap, bpp);
            StippledLine(bp, bpp);

            DoLineWithArrows(ref, ap, bpp, false);
            DoLabel(ref, labelPos, gr, gu);
            break;
        }

        case PT_FACE_DISTANCE:
        case PT_PLANE_DISTANCE: {
            Vector pt = SK.GetEntity(ptA)->PointGetNum();
            Entity *enta = SK.GetEntity(entityA);
            Vector n, p;
            if(type == PT_PLANE_DISTANCE) {
                n = enta->Normal()->NormalN();
                p = enta->WorkplaneGetOffset();
            } else {
                n = enta->FaceGetNormalNum();
                p = enta->FaceGetPointNum();
            }

            double d = (p.Minus(pt)).Dot(n);
            Vector closest = pt.Plus(n.WithMagnitude(d));

            Vector ref = ((closest.Plus(pt)).ScaledBy(0.5)).Plus(disp.offset);

            if(!pt.Equals(closest)) {
                DoLineWithArrows(ref, pt, closest, true);
            }

            DoLabel(ref, labelPos, gr, gu);
            break;
        }

        case PT_LINE_DISTANCE: {
            Vector pt = SK.GetEntity(ptA)->PointGetNum();
            Entity *line = SK.GetEntity(entityA);
            Vector lA = SK.GetEntity(line->point[0])->PointGetNum();
            Vector lB = SK.GetEntity(line->point[1])->PointGetNum();
            Vector dl = lB.Minus(lA);

            if(workplane.v != Entity::FREE_IN_3D.v) {
                lA = lA.ProjectInto(workplane);
                lB = lB.ProjectInto(workplane);
                DoProjectedPoint(&pt);
            }

            // Find the closest point on the line
            Vector closest = pt.ClosestPointOnLine(lA, dl);

//.........这里部分代码省略.........

void SolveSpace::ExportSectionTo(char *filename) {
    Vector gn = (SS.GW.projRight).Cross(SS.GW.projUp);
    gn = gn.WithMagnitude(1);

    Group *g = SK.GetGroup(SS.GW.activeGroup);
    g->GenerateDisplayItems();
    if(g->displayMesh.IsEmpty()) {
        Error("No solid model present; draw one with extrudes and revolves, "
              "or use Export 2d View to export bare lines and curves.");
        return;
    }
    
    // The plane in which the exported section lies; need this because we'll
    // reorient from that plane into the xy plane before exporting.
    Vector origin, u, v, n;
    double d;

    SS.GW.GroupSelection();
#define gs (SS.GW.gs)
    if((gs.n == 0 && g->activeWorkplane.v != Entity::FREE_IN_3D.v)) {
        Entity *wrkpl = SK.GetEntity(g->activeWorkplane);
        origin = wrkpl->WorkplaneGetOffset();
        n = wrkpl->Normal()->NormalN();
        u = wrkpl->Normal()->NormalU();
        v = wrkpl->Normal()->NormalV();
    } else if(gs.n == 1 && gs.faces == 1) {
        Entity *face = SK.GetEntity(gs.entity[0]);
        origin = face->FaceGetPointNum();
        n = face->FaceGetNormalNum();
        if(n.Dot(gn) < 0) n = n.ScaledBy(-1);
        u = n.Normal(0);
        v = n.Normal(1);
    } else if(gs.n == 3 && gs.vectors == 2 && gs.points == 1) {
        Vector ut = SK.GetEntity(gs.entity[0])->VectorGetNum(),
               vt = SK.GetEntity(gs.entity[1])->VectorGetNum();
        ut = ut.WithMagnitude(1);
        vt = vt.WithMagnitude(1);

        if(fabs(SS.GW.projUp.Dot(vt)) < fabs(SS.GW.projUp.Dot(ut))) {
            SWAP(Vector, ut, vt);
        }
        if(SS.GW.projRight.Dot(ut) < 0) ut = ut.ScaledBy(-1);
        if(SS.GW.projUp.   Dot(vt) < 0) vt = vt.ScaledBy(-1);

        origin = SK.GetEntity(gs.point[0])->PointGetNum();
        n = ut.Cross(vt);
        u = ut.WithMagnitude(1);
        v = (n.Cross(u)).WithMagnitude(1);
    } else {
        Error("Bad selection for export section. Please select:\n\n"
              "    * nothing, with an active workplane "
                        "(workplane is section plane)\n"
              "    * a face (section plane through face)\n"
              "    * a point and two line segments "
                        "(plane through point and parallel to lines)\n");
        return;
    }
    SS.GW.ClearSelection();

    n = n.WithMagnitude(1);
    d = origin.Dot(n);

    SEdgeList el;
    ZERO(&el);
    SBezierList bl;
    ZERO(&bl);

    // If there's a mesh, then grab the edges from it.
    g->runningMesh.MakeEdgesInPlaneInto(&el, n, d);

    // If there's a shell, then grab the edges and possibly Beziers.
    g->runningShell.MakeSectionEdgesInto(n, d,
       &el, 
       (SS.exportPwlCurves || fabs(SS.exportOffset) > LENGTH_EPS) ? NULL : &bl);

    // All of these are solid model edges, so use the appropriate style.
    SEdge *se;
    for(se = el.l.First(); se; se = el.l.NextAfter(se)) {
        se->auxA = Style::SOLID_EDGE;
    }
    SBezier *sb;
    for(sb = bl.l.First(); sb; sb = bl.l.NextAfter(sb)) {
        sb->auxA = Style::SOLID_EDGE;
    }

    el.CullExtraneousEdges();
    bl.CullIdenticalBeziers();

    // And write the edges.
    VectorFileWriter *out = VectorFileWriter::ForFile(filename);
    if(out) {
        // parallel projection (no perspective), and no mesh
        ExportLinesAndMesh(&el, &bl, NULL,
                           u, v, n, origin, 0,
                           out);
    }
    el.Clear();
    bl.Clear();
}