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opennurbs_brep_tools.cpp
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opennurbs_brep_tools.cpp
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//
// Copyright (c) 1993-2022 Robert McNeel & Associates. All rights reserved.
// OpenNURBS, Rhinoceros, and Rhino3D are registered trademarks of Robert
// McNeel & Associates.
//
// THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY.
// ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE AND OF
// MERCHANTABILITY ARE HEREBY DISCLAIMED.
//
// For complete openNURBS copyright information see <http://www.opennurbs.org>.
//
////////////////////////////////////////////////////////////////
#include "opennurbs.h"
#if !defined(ON_COMPILING_OPENNURBS)
// This check is included in all opennurbs source .c and .cpp files to insure
// ON_COMPILING_OPENNURBS is defined when opennurbs source is compiled.
// When opennurbs source is being compiled, ON_COMPILING_OPENNURBS is defined
// and the opennurbs .h files alter what is declared and how it is declared.
#error ON_COMPILING_OPENNURBS must be defined when compiling opennurbs
#endif
static
const ON_BrepEdge* FindLinearEdge( const ON_Brep& brep, int vi0, int vi1 )
{
// searchs for a linear edge connecting the vertices
// brep.m_V[vi0] and brep.m_V[vi1].
if ( vi0 < 0 || vi0 >= brep.m_V.Count() )
return nullptr;
if ( vi1 < 0 || vi1 >= brep.m_V.Count() )
return nullptr;
if ( vi0 == vi1 )
return nullptr;
const ON_BrepVertex& v0 = brep.m_V[vi0];
//const ON_BrepVertex& v1 = brep.m_V[vi1];
int vei;
for ( vei = 0; vei < v0.m_ei.Count(); vei++ )
{
const ON_BrepEdge* edge = brep.Edge( v0.m_ei[vei] );
if ( !edge )
continue;
if ( edge->m_vi[0] != vi0 && edge->m_vi[1] != vi0 )
continue;
if ( edge->m_vi[0] != vi1 && edge->m_vi[1] != vi1 )
continue;
if ( !edge->IsLinear() )
continue;
return edge;
}
return nullptr;
}
static
void SynchFaceOrientation( ON_Brep& brep, int fi )
{
const ON_BrepFace* face = brep.Face(fi);
if ( face )
{
int flip = -1, fli, lti;
for ( fli = 0; fli < face->m_li.Count(); fli++ )
{
const ON_BrepLoop* loop = brep.Loop( face->m_li[fli] );
if ( !loop )
continue;
for ( lti = 0; lti < loop->m_ti.Count(); lti++ )
{
const ON_BrepTrim* trim = brep.Trim( loop->m_ti[lti] );
if ( !trim )
continue;
const ON_BrepEdge* edge = brep.Edge( trim->m_ei );
if ( !edge )
continue;
if ( edge->m_ti.Count() != 2 )
continue;
const ON_BrepTrim* trim0 = brep.Trim( edge->m_ti[0] );
const ON_BrepTrim* trim1 = brep.Trim( edge->m_ti[1] );
if ( !trim0 || !trim1 )
continue;
bool bRev0 = trim0->m_bRev3d ? true : false;
bool bRev1 = trim1->m_bRev3d ? true : false;
if ( bRev0 == bRev1 )
{
if ( flip == -1 )
flip = 1;
else if (flip != 1 )
return;
}
else
{
if ( flip == -1 )
flip = 0;
else if (flip != 0 )
return;
}
}
}
if ( flip == 1 )
brep.FlipFace(brep.m_F[fi]);
}
}
ON_BrepFace* ON_Brep::NewRuledFace(
const ON_BrepEdge& edgeA,
bool bRevEdgeA,
const ON_BrepEdge& edgeB,
bool bRevEdgeB
)
{
if ( edgeA.m_edge_index == edgeB.m_edge_index )
return nullptr;
if ( Edge( edgeA.m_edge_index) != &edgeA )
return nullptr;
if ( Edge( edgeB.m_edge_index) != &edgeB )
return nullptr;
ON_NurbsCurve cA, cB;
if ( !edgeA.GetNurbForm( cA ) )
return nullptr;
if ( bRevEdgeA )
cA.Reverse();
if ( !edgeB.GetNurbForm( cB ) )
return nullptr;
if ( bRevEdgeB )
cB.Reverse();
ON_NurbsSurface* srf = ON_NurbsSurface::New();
if ( !srf->CreateRuledSurface( cA, cB ) )
{
delete srf;
return nullptr;
}
// corner vertices (sw,se,ne,nw)
int vid[4] = {-1,-1,-1,-1};
vid[0] = edgeA.m_vi[bRevEdgeA?1:0];
vid[1] = edgeA.m_vi[bRevEdgeA?0:1];
vid[2] = edgeB.m_vi[bRevEdgeB?0:1];
vid[3] = edgeB.m_vi[bRevEdgeB?1:0];
if ( vid[1] == vid[2] )
{
// make sure surface has a singular east side
srf->CollapseSide( 1 );
}
if ( vid[1] == vid[2] )
{
// make sure surface has a singular west side
srf->CollapseSide( 3 );
}
// side edges (s,e,n,w)
int eid[4] = {-1,-1,-1,-1};
bool bRev3d[4] = {false,false,false,false};
// south side
eid[0] = edgeA.m_edge_index;
bRev3d[0] = bRevEdgeA;
// east side
const ON_BrepEdge* east_edge = FindLinearEdge( *this, vid[1], vid[2] );
if ( east_edge )
{
eid[1] = east_edge->m_edge_index;
bRev3d[1] = (east_edge->m_vi[0] == vid[2]);
}
// north side
eid[2] = edgeB.m_edge_index;
bRev3d[2] = !bRevEdgeB;
// west side
const ON_BrepEdge* west_edge = FindLinearEdge( *this, vid[3], vid[0] );
if ( west_edge )
{
eid[3] = west_edge->m_edge_index;
bRev3d[3] = (west_edge->m_vi[0] == vid[0]);
}
ON_BrepFace* face = NewFace( srf, vid, eid, bRev3d );
if ( face )
SynchFaceOrientation( *this, face->m_face_index );
return face;
}
ON_BrepFace* ON_Brep::NewConeFace(
const ON_BrepVertex& vertex,
const ON_BrepEdge& edge,
bool bRevEdge
)
{
if ( Edge( edge.m_edge_index) != &edge )
return nullptr;
if ( Vertex( vertex.m_vertex_index) != &vertex )
return nullptr;
if ( edge.m_vi[0] == vertex.m_vertex_index )
return nullptr;
if ( edge.m_vi[1] == vertex.m_vertex_index )
return nullptr;
ON_NurbsCurve c;
if ( !edge.GetNurbForm( c ) )
return nullptr;
if ( bRevEdge )
c.Reverse();
ON_NurbsSurface* srf = ON_NurbsSurface::New();
if ( !srf->CreateConeSurface( vertex.point, c ) )
{
delete srf;
return nullptr;
}
// corner vertices (sw,se,ne,nw)
int vid[4] = {-1,-1,-1,-1};
vid[0] = edge.m_vi[bRevEdge?1:0];
vid[1] = edge.m_vi[bRevEdge?0:1];
vid[2] = vertex.m_vertex_index;
vid[3] = vertex.m_vertex_index;
// side edges (s,e,n,w)
int eid[4] = {-1,-1,-1,-1};
bool bRev3d[4] = {false,false,false,false};
// south side
eid[0] = edge.m_edge_index;
bRev3d[0] = bRevEdge;
// east side
const ON_BrepEdge* east_edge = FindLinearEdge( *this, vid[1], vid[2] );
if ( east_edge )
{
eid[1] = east_edge->m_edge_index;
bRev3d[1] = (east_edge->m_vi[0] == vid[2]);
}
// west side
const ON_BrepEdge* west_edge = FindLinearEdge( *this, vid[3], vid[0] );
if ( west_edge )
{
eid[3] = west_edge->m_edge_index;
bRev3d[3] = (west_edge->m_vi[0] == vid[0]);
}
ON_BrepFace* face = NewFace( srf, vid, eid, bRev3d );
if ( face )
SynchFaceOrientation( *this, face->m_face_index );
return face;
}
bool ON_Brep::SetTrimBoundingBoxes( bool bLazy )
{
bool rc = true;
int fi, face_count = m_F.Count();
for ( fi = 0; fi < face_count; fi++ )
{
if ( !SetTrimBoundingBoxes( m_F[fi], bLazy ) )
rc = false;
}
return rc;
}
bool ON_Brep::SetTrimBoundingBoxes( ON_BrepFace& face, bool bLazy )
{
bool rc = true;
int li, fli, loop_count = m_L.Count(), fl_count = face.m_li.Count();
for ( fli = 0; fli < fl_count; fli++ )
{
li = face.m_li[fli];
if ( li >= 0 && li < loop_count )
{
if ( !SetTrimBoundingBoxes( m_L[li], bLazy ) )
rc = false;
}
}
return rc;
}
bool ON_Brep::SetTrimBoundingBoxes( ON_BrepLoop& loop, bool bLazy )
{
// TL_Brep overrides this function and computes much tighter
// bounding boxes that take trim.m_t[] into account.
bool rc = true;
int ti, lti, trim_count = m_T.Count(), lt_count = loop.m_ti.Count();
bool bSetLoopBox = true;
if ( bLazy && loop.m_pbox.IsValid() )
bSetLoopBox = false;
else
loop.m_pbox.Destroy();
for ( lti = 0; lti < lt_count; lti++ )
{
ti = loop.m_ti[lti];
if ( ti >= 0 && ti < trim_count )
{
if ( !SetTrimBoundingBox( m_T[ti], bLazy ) )
rc = false;
else if ( bSetLoopBox )
loop.m_pbox.Union( m_T[ti].m_pbox );
}
}
return (rc && loop.m_pbox.IsValid()) ? true : false;
}
bool ON_Brep::SetTrimBoundingBox( ON_BrepTrim& trim, bool bLazy )
{
// TL_Brep overrides this function and computes much
// tighter bounding boxes that take trim.m_t[] into account.
bool rc = true;
if ( !trim.m_pbox.IsValid() || !bLazy )
{
trim.m_pbox.Destroy();
if ( trim.ProxyCurve() )
{
trim.m_pbox = trim.BoundingBox();
trim.m_pbox.m_min.z = 0.0;
trim.m_pbox.m_max.z = 0.0;
}
}
return (rc && trim.m_pbox.IsValid()) ? true : false;
}
void ON_Brep::SetTolerancesBoxesAndFlags(
bool bLazy,
bool bSetVertexTolerances,
bool bSetEdgeTolerances,
bool bSetTrimTolerances,
bool bSetTrimIsoFlags,
bool bSetTrimTypeFlags,
bool bSetLoopTypeFlags,
bool bSetTrimBoxes
)
{
int ei, ti, li;
const int trim_count = m_T.Count();
const int loop_count = m_L.Count();
const int edge_count = m_E.Count();
if ( bSetVertexTolerances )
SetVertexTolerances(bLazy);
if ( bSetEdgeTolerances )
{
for ( ei = 0; ei < edge_count; ei++ )
SetEdgeTolerance(m_E[ei],bLazy);
}
if ( bSetTrimTolerances )
{
for ( ti = 0; ti < trim_count; ti++ )
SetTrimTolerance(m_T[ti],bLazy);
}
if ( bSetTrimIsoFlags )
SetTrimIsoFlags();
if ( bSetTrimTypeFlags )
SetTrimTypeFlags(bLazy);
if ( bSetTrimTypeFlags )
SetTrimTypeFlags(bLazy);
if ( bSetLoopTypeFlags )
{
for ( li = 0; li < loop_count; li++ )
{
ON_BrepLoop& loop = m_L[li];
if ( loop.m_type == ON_BrepLoop::unknown || !bLazy )
{
loop.m_type = ComputeLoopType( loop );
}
}
}
if ( bSetTrimBoxes )
SetTrimBoundingBoxes(bLazy);
}
static
bool CheckForMatchingVertexIndices( int i, int j, int corner_vi[4] )
{
if (corner_vi[i] == corner_vi[j])
return true;
bool rc = false;
if ( corner_vi[i] >= 0 || corner_vi[j] >= 0 )
{
if ( corner_vi[i] == -1 )
{
corner_vi[i] = corner_vi[j];
rc = true;
}
else if ( corner_vi[j] == -1 )
{
corner_vi[j] = corner_vi[i];
rc = true;
}
}
return rc;
}
ON_BrepFace* ON_Brep::NewFace(
ON_Surface* pSurface,
int vid[4],
int eid[4],
bool bRev3d[4]
)
{
m_bbox.Destroy();
m_is_solid = 0;
bool bAddedSurface = false;
ON_BrepFace* pFace = nullptr;
if ( !pSurface )
return nullptr;
int si;
for ( si = 0; si < m_S.Count(); si++ )
{
if ( pSurface == m_S[si] )
break;
}
if ( si >= m_S.Count() )
{
si = AddSurface(pSurface);
bAddedSurface = (si >= 0);
}
int face_index = NewFace(si).m_face_index;
if ( NewOuterLoop( face_index, vid, eid, bRev3d ) )
{
pFace = &m_F[face_index];
}
else
{
// failed
if ( bAddedSurface )
{
m_S[si] = 0;
if ( m_S.Count() == si+1 )
m_S.SetCount(si);
}
DeleteFace( m_F[face_index], false );
if ( m_F.Count() == face_index+1 )
{
m_F.SetCount(face_index);
}
}
return pFace;
}
ON_BrepLoop* ON_Brep::NewOuterLoop(
int face_index,
int vid[4],
int eid[4],
bool boolRev3d[4]
)
{
// 2 Sept 2020 S. Baer (RH-59952)
// Destroy cached bounding box on breps when messing around with loops
m_bbox.Destroy();
m_is_solid = 0;
if ( face_index < 0 || face_index >= m_F.Count() )
return nullptr;
ON_BrepFace& face = m_F[face_index];
const ON_Surface* pSurface = face.SurfaceOf();
if (!pSurface)
return nullptr;
double u[2], v[2];
if (!pSurface->GetDomain(0, &u[0], &u[1]))
return 0;
if (!pSurface->GetDomain(1, &v[0], &v[1]))
return 0;
ON_3dPoint srf_P[2][2];
if ( !pSurface->EvPoint(u[0],v[0],srf_P[0][0] ) )
return 0;
if ( !pSurface->EvPoint(u[1],v[0],srf_P[1][0] ) )
return 0;
if ( !pSurface->EvPoint(u[0],v[1],srf_P[0][1] ) )
return 0;
if ( !pSurface->EvPoint(u[1],v[1],srf_P[1][1] ) )
return 0;
bool bIsSingular[4]; // south, east, north, west
bool bIsClosed[2]; // u direction, v direction
int i, eti;
ON_Curve* c3[4] = {nullptr,nullptr,nullptr,nullptr};
int bRev3d[4] = { 0 };
for ( i = 0; i < 4; i++ )
{
if ( boolRev3d[i] )
bRev3d[i] = 1; // do this so we can use 1-bRev3d[i] as an array index
}
// check specified edge indices
for ( i = 0; i < 4; i++ )
{
if ( eid[i] != -1 )
{
if ( eid[i] < 0 || eid[i] >= m_E.Count() )
{
ON_ERROR("Bad edge index passed to ON_BrepNewFace.");
return 0;
}
const int* edge_vi = m_E[eid[i]].m_vi;
int vi0 = edge_vi[bRev3d[i]];
int vi1 = edge_vi[1-bRev3d[i]];
if ( vi0 < 0 || vi1 < 0 )
{
ON_ERROR("ON_Brep::NewFace(ON_Surface*,...) error: Bad edge vertex informtion.");
return 0;
}
if ( vid[i] == -1 )
vid[i] = vi0;
else if ( vid[i] != vi0 )
{
ON_ERROR("ON_Brep::NewFace(ON_Surface*,...) error: Edge and vertex informtion do not match.");
return 0;
}
if ( vid[(i+1)%4] == -1 )
vid[(i+1)%4] = vi1;
else if ( vid[(i+1)%4] != vi1 )
{
ON_ERROR("ON_Brep::NewFace(ON_Surface*,...) error: Edge and vertex informtion do not match.");
return 0;
}
}
}
// check specified vertex indices
for ( i = 0; i < 4; i++ )
{
if ( vid[i] != -1 )
{
if ( vid[i] < 0 || vid[i] >= m_V.Count() )
{
ON_ERROR("Bad vertex index passed to ON_Brep::NewFace.");
return 0;
}
}
}
for ( i = 0; i < 4; i++ )
bIsSingular[i] = pSurface->IsSingular(i);
for ( i = 0; i < 2; i++ )
bIsClosed[i] = pSurface->IsClosed(i);
for (i = 0; i < 2; i++ )
{
if ( bIsClosed[i] )
{
int j = i?0:1;
int k = j+2;
if ( eid[j] == -1 && eid[k] != -1)
{
eid[j] = eid[k];
bRev3d[j] = 1-bRev3d[k];
}
else if ( eid[k] == -1 && eid[j] != -1)
{
eid[k] = eid[j];
bRev3d[k] = 1-bRev3d[j];
}
else if ( eid[k] != -1 || eid[j] != -1)
{
if ( eid[j] != eid[k] || bRev3d[j] != 1-bRev3d[k] )
{
ON_ERROR("Bad edge information passed to ON_Brep::NewFace.");
return 0;
}
}
}
}
// if surface has singularities or is closed, make sure vertex and edge information is correct
for ( i = 0; i < 4; i++ )
{
if ( bIsSingular[i] )
{
if ( eid[i] != -1 || bRev3d[i] )
{
ON_ERROR("Bad edge information passed to ON_Brep::NewFace.");
return 0;
}
}
if ( bIsSingular[i] || bIsClosed[i%2] )
{
if ( !CheckForMatchingVertexIndices(i,(i+1)%4,vid) )
{
ON_ERROR("Bad vertex indices passed to ON_Brep::NewFace.");
return 0;
}
}
}
m_C3.Reserve( m_C3.Count() + 4 );
// create missing 3d curves
bool bEdgeIsClosed[4]; // true if 3d edge is closed or edge is singular.
for ( i = 0; i < 4; i++ )
{
bEdgeIsClosed[i] = false;
if ( eid[i] != -1 )
{
const ON_BrepEdge& edge = m_E[eid[i]];
bEdgeIsClosed[i] = (edge.m_vi[0] == edge.m_vi[1]);
continue;
}
if ( bIsSingular[i] )
{
bEdgeIsClosed[i] = true;
continue;
}
if ( i >= 2 && bIsClosed[(i==2)?1:0] )
{
bEdgeIsClosed[i] = bEdgeIsClosed[i-2];
continue;
}
switch(i)
{
case 0: // south side
c3[i] = pSurface->IsoCurve(i%2, v[0]);
break;
case 1: // east side
c3[i] = pSurface->IsoCurve(i%2, u[1]);
break;
case 2: // north side
c3[i] = pSurface->IsoCurve(i%2, v[1]);
break;
case 3: // west side
c3[i] = pSurface->IsoCurve(i%2, u[0]);
break;
}
if ( !c3[i] )
{
ON_ERROR("ON_Brep::NewLoop unable to make 3d edge curve.");
return 0;
}
if ( pSurface->IsClosed(i%2) )
bEdgeIsClosed[i] = true;
else
bEdgeIsClosed[i] = c3[i]->IsClosed()?true:false;
if ( (i <= 1 && bRev3d[i]) || (i >= 2 && !bRev3d[i]) )
{
c3[i]->Reverse();
}
}
if ( m_V.Capacity() < 2 )
m_V.Reserve(4);
// create missing vertices
if ( vid[0] == -1 )
{
if ( vid[1] >= 0 && bEdgeIsClosed[0] )
vid[0] = vid[1];
else if ( vid[3] >= 0 && bEdgeIsClosed[3] )
vid[0] = vid[3];
else
vid[0] = NewVertex( srf_P[0][0],0.0).m_vertex_index;
}
if ( vid[1] == -1 )
{
if ( bEdgeIsClosed[0] )
vid[1] = vid[0];
else if ( vid[2] >= 0 && bEdgeIsClosed[1] )
vid[1] = vid[2];
else
vid[1] = NewVertex(srf_P[1][0],0.0).m_vertex_index;
}
if ( vid[2] == -1 )
{
if ( bEdgeIsClosed[1] )
vid[2] = vid[1];
else if (vid[3] >= 0 && bEdgeIsClosed[2] )
vid[2] = vid[3];
else
vid[2] = NewVertex( srf_P[1][1],0.0).m_vertex_index;
}
if ( vid[3] == -1 )
{
if ( bEdgeIsClosed[2] )
vid[3] = vid[2];
else if ( bEdgeIsClosed[3] )
vid[3] = vid[0];
else
vid[3] = NewVertex( srf_P[0][1],0.0).m_vertex_index;
}
if ( m_E.Capacity() < 4 )
m_E.Reserve(4);
// create missing edges
for ( i = 0; i < 4; i++ )
{
if ( c3[i] )
{
int i0, i1;
if ( bRev3d[i] )
{
i0 = (i+1)%4;
i1 = i;
}
else
{
i0 = i;
i1 = (i+1)%4;
}
ON_BrepEdge& edge = NewEdge( m_V[vid[i0]], m_V[vid[i1]], AddEdgeCurve( c3[i] ) );
edge.m_tolerance = 0.0;
eid[i] = edge.m_edge_index;
if ( i == 0 && bIsClosed[1] )
{
eid[2] = eid[0];
bRev3d[2] = 1-bRev3d[0];
}
else if ( i == 1 && bIsClosed[0] )
{
eid[3] = eid[1];
bRev3d[3] = 1-bRev3d[1];
}
}
}
m_T.Reserve( m_T.Count() + 4 );
m_C2.Reserve( m_C2.Count() + 4 );
ON_BrepLoop& loop = NewLoop( ON_BrepLoop::outer, face );
loop.m_pbox.m_min.x = u[0];
loop.m_pbox.m_min.y = v[0];
loop.m_pbox.m_min.z = 0.0;
loop.m_pbox.m_max.x = u[1];
loop.m_pbox.m_max.y = v[1];
loop.m_pbox.m_max.z = 0.0;
ON_3dPoint corners[4];
corners[0].Set(u[0],v[0],0.0);
corners[1].Set(u[1],v[0],0.0);
corners[2].Set(u[1],v[1],0.0);
corners[3].Set(u[0],v[1],0.0);
ON_Surface::ISO srf_iso[4] = {ON_Surface::S_iso,ON_Surface::E_iso,ON_Surface::N_iso,ON_Surface::W_iso};
for ( i = 0; i < 4; i++ )
{
ON_NurbsCurve* c2 = new ON_NurbsCurve( 2, 0, 2, 2 );
c2->SetCV(0,corners[i]);
c2->SetCV(1,corners[(i+1)%4]);
c2->m_knot[0] = 0.0;
c2->m_knot[1] = 1.0;
if ( i%2 )
c2->SetDomain(v[0],v[1]);
else
c2->SetDomain(u[0],u[1]);
int c2i = AddTrimCurve( c2 );
if ( bIsSingular[i] )
NewSingularTrim( m_V[vid[i]],loop,srf_iso[i],c2i);
else
{
ON_BrepTrim& trim = NewTrim( m_E[eid[i]], bRev3d[i], loop, c2i);
trim.m_iso = srf_iso[i];
if ( bIsClosed[(i+1)%2] )
trim.m_type = ON_BrepTrim::seam;
else {
trim.m_type = ON_BrepTrim::boundary;
const ON_BrepEdge& edge = m_E[eid[i]];
if ( edge.m_ti.Count() > 1 )
{
for ( eti = 0; eti < edge.m_ti.Count(); eti++ )
{
m_T[edge.m_ti[eti]].m_type = ON_BrepTrim::mated;
}
}
}
trim.m_tolerance[0] = 0.0;
trim.m_tolerance[1] = 0.0;
trim.m__legacy_2d_tol = 0.0;
trim.m__legacy_3d_tol = 0.0;
trim.m__legacy_flags_Set(-1,1);
}
}
for ( i = 0; i < 4; i++ )
{
boolRev3d[i] = bRev3d[i] ? true : false;
}
return &m_L[loop.m_loop_index];
}
ON_Brep* ON_BrepBox( const ON_3dPoint* box_corners, ON_Brep* pBrep )
{
ON_Brep* brep = 0;
int vi, ei, fi, si, c2i;
if (box_corners)
{
if ( pBrep ) {
pBrep->Destroy();
brep = pBrep;
}
else
brep = new ON_Brep();
brep->m_C2.Reserve(24);
brep->m_C3.Reserve(12);
brep->m_S.Reserve(6);
brep->m_V.Reserve(8);
brep->m_E.Reserve(12);
brep->m_L.Reserve(6);
brep->m_T.Reserve(24);
brep->m_F.Reserve(6);
for ( vi = 0; vi < 8; vi++ )
{
brep->NewVertex( box_corners[vi], 0.0 );
}
for ( ei = 0; ei < 4; ei++ )
{
ON_BrepVertex& v0 = brep->m_V[ei];
ON_BrepVertex& v1 = brep->m_V[(ei+1)%4];
brep->m_C3.Append( new ON_LineCurve( v0.point, v1.point ) );
brep->NewEdge( v0, v1, ei, nullptr, 0.0 );
}
for ( ei = 4; ei < 8; ei++ )
{
ON_BrepVertex& v0 = brep->m_V[ei];
ON_BrepVertex& v1 = brep->m_V[ei==7?4:(ei+1)];
brep->m_C3.Append( new ON_LineCurve( v0.point, v1.point ) );
brep->NewEdge( v0, v1, ei, nullptr, 0.0 );
}
for ( ei = 8; ei < 12; ei++ )
{
ON_BrepVertex& v0 = brep->m_V[ei-8];
ON_BrepVertex& v1 = brep->m_V[ei-4];
brep->m_C3.Append( new ON_LineCurve( v0.point, v1.point ) );
brep->NewEdge( v0, v1, ei, nullptr, 0.0 );
}
/*
// v7_______e6_____v6
// |\ |\
// | e7 | e5
// | \ ______e4_____\
// e11 v4 | v5
// | | e10 |
// | | | |
// 3---|---e2-----2 e9
// \ e8 \ |
// e3 | e1 |
// \ | \ |
// \v0_____e0_____\v1
*/
struct {
int e[4], bRev[4];
} f[6] = {
{{0, 9, 4, 8}, {false, false, true, true}},
{{1,10, 5, 9}, {false, false, true, true}},
{{2,11, 6,10}, {false, false, true, true}},
{{3, 8, 7,11}, {false, false, true, true}},
{{3, 2, 1, 0}, {true, true, true, true}},
{{4, 5, 6, 7}, {false, false, false, false}}
};
for ( fi = 0; fi < 6; fi++ )
{
ON_BrepEdge& e0 = brep->m_E[f[fi].e[0]];
ON_BrepEdge& e1 = brep->m_E[f[fi].e[1]];
ON_BrepEdge& e2 = brep->m_E[f[fi].e[2]];
ON_BrepEdge& e3 = brep->m_E[f[fi].e[3]];
ON_BrepVertex& v0 = brep->m_V[e0.m_vi[f[fi].bRev[0]?1:0]];
ON_BrepVertex& v1 = brep->m_V[e1.m_vi[f[fi].bRev[1]?1:0]];
ON_BrepVertex& v2 = brep->m_V[e2.m_vi[f[fi].bRev[2]?1:0]];
ON_BrepVertex& v3 = brep->m_V[e3.m_vi[f[fi].bRev[3]?1:0]];
si = brep->AddSurface( ON_NurbsSurfaceQuadrilateral( v0.point, v1.point, v2.point, v3.point ) );
ON_Interval s = brep->m_S[si]->Domain(0);
ON_Interval t = brep->m_S[si]->Domain(1);
ON_2dPoint p0(s[0],t[0]);
ON_2dPoint p1(s[1],t[0]);
ON_2dPoint p2(s[1],t[1]);
ON_2dPoint p3(s[0],t[1]);
ON_BrepFace& face = brep->NewFace( si );
ON_BrepLoop& loop = brep->NewLoop( ON_BrepLoop::outer, face );
loop.m_pbox.m_min.x = s[0];
loop.m_pbox.m_min.y = t[0];
loop.m_pbox.m_min.z = 0.0;
loop.m_pbox.m_max.x = s[1];
loop.m_pbox.m_max.y = t[1];
loop.m_pbox.m_max.z = 0.0;
// south side of surface
c2i = brep->AddTrimCurve( new ON_LineCurve( p0, p1 ) );
ON_BrepTrim& trim0 = brep->NewTrim( e0, f[fi].bRev[0], loop, c2i );
trim0.m_tolerance[0] = 0.0;
trim0.m_tolerance[1] = 0.0;
trim0.m_type = (trim0.m_vi[0] != trim0.m_vi[1]) ? ON_BrepTrim::mated : ON_BrepTrim::singular;
trim0.m_iso = ON_Surface::S_iso;
// east side of surface
c2i = brep->AddTrimCurve( new ON_LineCurve( p1, p2 ) );
ON_BrepTrim& trim1 = brep->NewTrim( e1, f[fi].bRev[1], loop, c2i );
trim1.m_tolerance[0] = 0.0;
trim1.m_tolerance[1] = 0.0;
trim1.m_type = (trim1.m_vi[0] != trim1.m_vi[1]) ? ON_BrepTrim::mated : ON_BrepTrim::singular;
trim1.m_iso = ON_Surface::E_iso;
// north side of surface
c2i = brep->AddTrimCurve( new ON_LineCurve( p2, p3 ) );
ON_BrepTrim& trim2 = brep->NewTrim( e2, f[fi].bRev[2], loop, c2i );
trim2.m_tolerance[0] = 0.0;
trim2.m_tolerance[1] = 0.0;
trim2.m_type = (trim2.m_vi[0] != trim2.m_vi[1]) ? ON_BrepTrim::mated : ON_BrepTrim::singular;
trim2.m_iso = ON_Surface::N_iso;
// west side of surface
c2i = brep->AddTrimCurve( new ON_LineCurve( p3, p0 ) );
ON_BrepTrim& trim3 = brep->NewTrim( e3, f[fi].bRev[3], loop, c2i );
trim3.m_tolerance[0] = 0.0;
trim3.m_tolerance[1] = 0.0;
trim3.m_type = (trim3.m_vi[0] != trim3.m_vi[1]) ? ON_BrepTrim::mated : ON_BrepTrim::singular;
trim3.m_iso = ON_Surface::W_iso;
}
if ( !brep->IsValid() ) {
if ( pBrep )
pBrep->Destroy();
else
delete brep;
brep = 0;
}
}
else
brep = 0;
return brep;
}
ON_Brep* ON_BrepWedge( const ON_3dPoint* corners, ON_Brep* pBrep )
{
ON_Brep* brep = 0;
int vi, ei, ti, fi, si, c2i;
if(corners)
{
// use the one passed in or make a new one
if( pBrep )
{
pBrep->Destroy();
brep = pBrep;
}
else
brep = new ON_Brep();
brep->m_C2.Reserve(18);
brep->m_C3.Reserve(9);
brep->m_S.Reserve(5);
brep->m_V.Reserve(6);
brep->m_E.Reserve(9);
brep->m_L.Reserve(5);
brep->m_T.Reserve(18);
brep->m_F.Reserve(5);
// vertices
for ( vi = 0; vi < 6; vi++ )
{
brep->NewVertex( corners[vi], 0.0 );
}
// 3d edges around bottom e0 - e2
for ( ei = 0; ei < 3; ei++ )
{
ON_BrepVertex& v0 = brep->m_V[ei];
ON_BrepVertex& v1 = brep->m_V[(ei+1)%3];
brep->m_C3.Append( new ON_LineCurve( v0.point, v1.point ) );
brep->NewEdge( v0, v1, ei, nullptr, 0.0 );
}
// 3d edges around top e3 - e5
for ( ei = 3; ei < 6; ei++ )
{
ON_BrepVertex& v0 = brep->m_V[ei];
ON_BrepVertex& v1 = brep->m_V[ei==5?3:(ei+1)];
brep->m_C3.Append( new ON_LineCurve( v0.point, v1.point ) );
brep->NewEdge( v0, v1, ei, nullptr, 0.0 );
}
// 3d vertical edges e6 - e8
for ( ei = 6; ei < 9; ei++ )
{
ON_BrepVertex& v0 = brep->m_V[ei-6];
ON_BrepVertex& v1 = brep->m_V[ei-3];
brep->m_C3.Append( new ON_LineCurve( v0.point, v1.point ) );
brep->NewEdge( v0, v1, ei, nullptr, 0.0 );
}
/*
//