mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
synced 2024-11-13 23:50:09 +00:00
392e5e8bed
While this may be worth revisiting, we should first quantify the benefits and identify the compilers that support it. Ultimately, we may never use pragma once in favor of strictly using standard C++.
741 lines
24 KiB
C++
741 lines
24 KiB
C++
//
|
|
// Copyright 2013 Pixar
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "Apache License")
|
|
// with the following modification; you may not use this file except in
|
|
// compliance with the Apache License and the following modification to it:
|
|
// Section 6. Trademarks. is deleted and replaced with:
|
|
//
|
|
// 6. Trademarks. This License does not grant permission to use the trade
|
|
// names, trademarks, service marks, or product names of the Licensor
|
|
// and its affiliates, except as required to comply with Section 4(c) of
|
|
// the License and to reproduce the content of the NOTICE file.
|
|
//
|
|
// You may obtain a copy of the Apache License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the Apache License with the above modification is
|
|
// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
// KIND, either express or implied. See the Apache License for the specific
|
|
// language governing permissions and limitations under the Apache License.
|
|
//
|
|
|
|
#ifndef OPENSUBDIV3_HBRHALFEDGE_H
|
|
#define OPENSUBDIV3_HBRHALFEDGE_H
|
|
|
|
#include <assert.h>
|
|
#include <stddef.h>
|
|
#include <cstring>
|
|
#include <iostream>
|
|
|
|
|
|
#ifdef HBRSTITCH
|
|
#include "libgprims/stitch.h"
|
|
#include "libgprims/stitchInternal.h"
|
|
#endif
|
|
|
|
#include "../version.h"
|
|
|
|
namespace OpenSubdiv {
|
|
namespace OPENSUBDIV_VERSION {
|
|
|
|
template <class T> class HbrFace;
|
|
template <class T> class HbrHalfedge;
|
|
template <class T> class HbrVertex;
|
|
template <class T> class HbrMesh;
|
|
|
|
template <class T> std::ostream& operator<<(std::ostream& out, const HbrHalfedge<T>& edge);
|
|
|
|
template <class T> class HbrHalfedge {
|
|
|
|
private:
|
|
HbrHalfedge(): opposite(0), incidentVertex(-1), vchild(-1), sharpness(0.0f)
|
|
#ifdef HBRSTITCH
|
|
, stitchccw(1), raystitchccw(1)
|
|
#endif
|
|
, coarse(1)
|
|
{
|
|
}
|
|
|
|
HbrHalfedge(const HbrHalfedge &/* edge */) {}
|
|
|
|
~HbrHalfedge();
|
|
|
|
void Clear();
|
|
|
|
// Finish the initialization of the halfedge. Should only be
|
|
// called by HbrFace
|
|
void Initialize(HbrHalfedge<T>* opposite, int index, HbrVertex<T>* origin, unsigned int *fvarbits, HbrFace<T>* face);
|
|
public:
|
|
|
|
// Returns the opposite half edge
|
|
HbrHalfedge<T>* GetOpposite() const { return opposite; }
|
|
|
|
// Sets the opposite half edge
|
|
void SetOpposite(HbrHalfedge<T>* opposite) { this->opposite = opposite; sharpness = opposite->sharpness; }
|
|
|
|
// Returns the next clockwise halfedge around the incident face
|
|
HbrHalfedge<T>* GetNext() const {
|
|
if (m_index == 4) {
|
|
const size_t edgesize = sizeof(HbrHalfedge<T>) + sizeof(HbrFace<T>*);
|
|
if (lastedge) {
|
|
return (HbrHalfedge<T>*) ((char*) this - (GetFace()->GetNumVertices() - 1) * edgesize);
|
|
} else {
|
|
return (HbrHalfedge<T>*) ((char*) this + edgesize);
|
|
}
|
|
} else {
|
|
if (lastedge) {
|
|
return (HbrHalfedge<T>*) ((char*) this - (m_index) * sizeof(HbrHalfedge<T>));
|
|
} else {
|
|
return (HbrHalfedge<T>*) ((char*) this + sizeof(HbrHalfedge<T>));
|
|
}
|
|
}
|
|
}
|
|
|
|
// Returns the previous counterclockwise halfedge around the incident face
|
|
HbrHalfedge<T>* GetPrev() const {
|
|
const size_t edgesize = (m_index == 4) ?
|
|
(sizeof(HbrHalfedge<T>) + sizeof(HbrFace<T>*)) :
|
|
sizeof(HbrHalfedge<T>);
|
|
if (firstedge) {
|
|
return (HbrHalfedge<T>*) ((char*) this + (GetFace()->GetNumVertices() - 1) * edgesize);
|
|
} else {
|
|
return (HbrHalfedge<T>*) ((char*) this - edgesize);
|
|
}
|
|
}
|
|
|
|
// Returns the incident vertex
|
|
HbrVertex<T>* GetVertex() const {
|
|
return GetMesh()->GetVertex(incidentVertex);
|
|
}
|
|
|
|
// Returns the incident vertex
|
|
HbrVertex<T>* GetVertex(HbrMesh<T> *mesh) const {
|
|
return mesh->GetVertex(incidentVertex);
|
|
}
|
|
|
|
// Returns the incident vertex
|
|
int GetVertexID() const {
|
|
return incidentVertex;
|
|
}
|
|
|
|
// Returns the source vertex
|
|
HbrVertex<T>* GetOrgVertex() const {
|
|
return GetVertex();
|
|
}
|
|
|
|
// Returns the source vertex
|
|
HbrVertex<T>* GetOrgVertex(HbrMesh<T> *mesh) const {
|
|
return GetVertex(mesh);
|
|
}
|
|
|
|
// Returns the source vertex id
|
|
int GetOrgVertexID() const {
|
|
return incidentVertex;
|
|
}
|
|
|
|
// Changes the origin vertex. Generally not a good idea to do
|
|
void SetOrgVertex(HbrVertex<T>* v) { incidentVertex = v->GetID(); }
|
|
|
|
// Returns the destination vertex
|
|
HbrVertex<T>* GetDestVertex() const { return GetNext()->GetOrgVertex(); }
|
|
|
|
// Returns the destination vertex
|
|
HbrVertex<T>* GetDestVertex(HbrMesh<T> *mesh) const { return GetNext()->GetOrgVertex(mesh); }
|
|
|
|
// Returns the destination vertex ID
|
|
int GetDestVertexID() const { return GetNext()->GetOrgVertexID(); }
|
|
|
|
// Returns the incident facet
|
|
HbrFace<T>* GetFace() const {
|
|
if (m_index == 4) {
|
|
// Pointer to face is stored after the data for the edge
|
|
return *(HbrFace<T>**)((char *) this + sizeof(HbrHalfedge<T>));
|
|
} else {
|
|
return (HbrFace<T>*) ((char*) this - (m_index) * sizeof(HbrHalfedge<T>) -
|
|
offsetof(HbrFace<T>, edges));
|
|
}
|
|
}
|
|
|
|
// Returns the mesh to which this edge belongs
|
|
HbrMesh<T>* GetMesh() const { return GetFace()->GetMesh(); }
|
|
|
|
// Returns the face on the right
|
|
HbrFace<T>* GetRightFace() const { return opposite ? opposite->GetLeftFace() : NULL; }
|
|
|
|
// Return the face on the left of the halfedge
|
|
HbrFace<T>* GetLeftFace() const { return GetFace(); }
|
|
|
|
// Returns whether this is a boundary edge
|
|
bool IsBoundary() const { return opposite == 0; }
|
|
|
|
// Tag the edge as being an infinitely sharp facevarying edge
|
|
void SetFVarInfiniteSharp(int datum, bool infsharp) {
|
|
int intindex = datum >> 4;
|
|
unsigned int bits = infsharp << ((datum & 15) * 2);
|
|
getFVarInfSharp()[intindex] |= bits;
|
|
if (opposite) {
|
|
opposite->getFVarInfSharp()[intindex] |= bits;
|
|
}
|
|
}
|
|
|
|
// Copy fvar infinite sharpness flags from another edge
|
|
void CopyFVarInfiniteSharpness(HbrHalfedge<T>* edge) {
|
|
unsigned int *fvarinfsharp = getFVarInfSharp();
|
|
if (fvarinfsharp) {
|
|
const int fvarcount = GetMesh()->GetFVarCount();
|
|
int fvarbitsSizePerEdge = ((fvarcount + 15) / 16);
|
|
|
|
if (edge->IsSharp(true)) {
|
|
memset(fvarinfsharp, 0x55555555, fvarbitsSizePerEdge * sizeof(unsigned int));
|
|
} else {
|
|
memcpy(fvarinfsharp, edge->getFVarInfSharp(), fvarbitsSizePerEdge * sizeof(unsigned int));
|
|
}
|
|
}
|
|
}
|
|
|
|
// Returns whether the edge is infinitely sharp in facevarying for
|
|
// a particular facevarying datum
|
|
bool GetFVarInfiniteSharp(int datum);
|
|
|
|
// Returns whether the edge is infinitely sharp in any facevarying
|
|
// datum
|
|
bool IsFVarInfiniteSharpAnywhere();
|
|
|
|
// Get the sharpness relative to facevarying data
|
|
float GetFVarSharpness(int datum, bool ignoreGeometry=false);
|
|
|
|
// Returns the (raw) sharpness of the edge
|
|
float GetSharpness() const { return sharpness; }
|
|
|
|
// Sets the sharpness of the edge
|
|
void SetSharpness(float sharp) { sharpness = sharp; if (opposite) opposite->sharpness = sharp; ClearMask(); }
|
|
|
|
// Returns whether the edge is sharp at the current level of
|
|
// subdivision (next = false) or at the next level of subdivision
|
|
// (next = true).
|
|
bool IsSharp(bool next) const { return (next ? (sharpness > 0.0f) : (sharpness >= 1.0f)); }
|
|
|
|
// Clears the masks of the adjacent edge vertices. Usually called
|
|
// when a change in edge sharpness occurs.
|
|
void ClearMask() { GetOrgVertex()->ClearMask(); GetDestVertex()->ClearMask(); }
|
|
|
|
// Subdivide the edge into a vertex if needed and return
|
|
HbrVertex<T>* Subdivide();
|
|
|
|
// Make sure the edge has its opposite face
|
|
void GuaranteeNeighbor();
|
|
|
|
// True if the edge has a subdivided child vertex
|
|
bool HasChild() const { return vchild!=-1; }
|
|
|
|
// Remove the reference to subdivided vertex
|
|
void RemoveChild() { vchild = -1; }
|
|
|
|
// Sharpness constants
|
|
enum Mask {
|
|
k_Smooth = 0,
|
|
k_Sharp = 1,
|
|
k_InfinitelySharp = 10
|
|
};
|
|
|
|
#ifdef HBRSTITCH
|
|
StitchEdge* GetStitchEdge(int i) {
|
|
StitchEdge **stitchEdge = getStitchEdges();
|
|
// If the stitch edge exists, the ownership is transferred to
|
|
// the caller. Make sure the opposite edge loses ownership as
|
|
// well.
|
|
if (stitchEdge[i]) {
|
|
if (opposite) {
|
|
opposite->getStitchEdges()[i] = 0;
|
|
}
|
|
return StitchGetEdge(&stitchEdge[i]);
|
|
}
|
|
// If the stitch edge does not exist then we create one now.
|
|
// Make sure the opposite edge gets a copy of it too
|
|
else {
|
|
StitchGetEdge(&stitchEdge[i]);
|
|
if (opposite) {
|
|
opposite->getStitchEdges()[i] = stitchEdge[i];
|
|
}
|
|
return stitchEdge[i];
|
|
}
|
|
}
|
|
|
|
// If stitch edge exists, and this edge has no opposite, destroy
|
|
// it
|
|
void DestroyStitchEdges(int stitchcount) {
|
|
if (!opposite) {
|
|
StitchEdge **stitchEdge = getStitchEdges();
|
|
for (int i = 0; i < stitchcount; ++i) {
|
|
if (stitchEdge[i]) {
|
|
StitchFreeEdge(stitchEdge[i]);
|
|
stitchEdge[i] = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
StitchEdge* GetRayStitchEdge(int i) {
|
|
return GetStitchEdge(i + 2);
|
|
}
|
|
|
|
// Splits our split edge between our children. We'd better have
|
|
// subdivided this edge by this point
|
|
void SplitStitchEdge(int i) {
|
|
StitchEdge* se = GetStitchEdge(i);
|
|
HbrHalfedge<T>* ea = GetOrgVertex()->Subdivide()->GetEdge(Subdivide());
|
|
HbrHalfedge<T>* eb = Subdivide()->GetEdge(GetDestVertex()->Subdivide());
|
|
StitchEdge **ease = ea->getStitchEdges();
|
|
StitchEdge **ebse = eb->getStitchEdges();
|
|
if (i >= 2) { // ray tracing stitches
|
|
if (!raystitchccw) {
|
|
StitchSplitEdge(se, &ease[i], &ebse[i], false, 0, 0, 0);
|
|
} else {
|
|
StitchSplitEdge(se, &ebse[i], &ease[i], true, 0, 0, 0);
|
|
}
|
|
ea->raystitchccw = eb->raystitchccw = raystitchccw;
|
|
if (eb->opposite) {
|
|
eb->opposite->getStitchEdges()[i] = ebse[i];
|
|
eb->opposite->raystitchccw = raystitchccw;
|
|
}
|
|
if (ea->opposite) {
|
|
ea->opposite->getStitchEdges()[i] = ease[i];
|
|
ea->opposite->raystitchccw = raystitchccw;
|
|
}
|
|
} else {
|
|
if (!stitchccw) {
|
|
StitchSplitEdge(se, &ease[i], &ebse[i], false, 0, 0, 0);
|
|
} else {
|
|
StitchSplitEdge(se, &ebse[i], &ease[i], true, 0, 0, 0);
|
|
}
|
|
ea->stitchccw = eb->stitchccw = stitchccw;
|
|
if (eb->opposite) {
|
|
eb->opposite->getStitchEdges()[i] = ebse[i];
|
|
eb->opposite->stitchccw = stitchccw;
|
|
}
|
|
if (ea->opposite) {
|
|
ea->opposite->getStitchEdges()[i] = ease[i];
|
|
ea->opposite->stitchccw = stitchccw;
|
|
}
|
|
}
|
|
}
|
|
|
|
void SplitRayStitchEdge(int i) {
|
|
SplitStitchEdge(i + 2);
|
|
}
|
|
|
|
void SetStitchEdge(int i, StitchEdge* edge) {
|
|
StitchEdge **stitchEdges = getStitchEdges();
|
|
stitchEdges[i] = edge;
|
|
if (opposite) {
|
|
opposite->getStitchEdges()[i] = edge;
|
|
}
|
|
}
|
|
|
|
void SetRayStitchEdge(int i, StitchEdge* edge) {
|
|
StitchEdge **stitchEdges = getStitchEdges();
|
|
stitchEdges[i+2] = edge;
|
|
if (opposite) {
|
|
opposite->getStitchEdges()[i+2] = edge;
|
|
}
|
|
}
|
|
|
|
void* GetStitchData() const {
|
|
if (stitchdatavalid) return GetMesh()->GetStitchData(this);
|
|
else return 0;
|
|
}
|
|
|
|
void SetStitchData(void* data) {
|
|
GetMesh()->SetStitchData(this, data);
|
|
stitchdatavalid = data ? 1 : 0;
|
|
if (opposite) {
|
|
opposite->GetMesh()->SetStitchData(opposite, data);
|
|
opposite->stitchdatavalid = stitchdatavalid;
|
|
}
|
|
}
|
|
|
|
bool GetStitchCCW(bool raytraced) const { return raytraced ? raystitchccw : stitchccw; }
|
|
|
|
void ClearStitchCCW(bool raytraced) {
|
|
if (raytraced) {
|
|
raystitchccw = 0;
|
|
if (opposite) opposite->raystitchccw = 0;
|
|
} else {
|
|
stitchccw = 0;
|
|
if (opposite) opposite->stitchccw = 0;
|
|
}
|
|
}
|
|
|
|
void ToggleStitchCCW(bool raytraced) {
|
|
if (raytraced) {
|
|
raystitchccw = 1 - raystitchccw;
|
|
if (opposite) opposite->raystitchccw = raystitchccw;
|
|
} else {
|
|
stitchccw = 1 - stitchccw;
|
|
if (opposite) opposite->stitchccw = stitchccw;
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
// Marks the edge as being "coarse" (belonging to the control
|
|
// mesh). Generally this distinction only needs to be made if
|
|
// we're worried about interpolateboundary behaviour
|
|
void SetCoarse(bool c) { coarse = c; }
|
|
bool IsCoarse() const { return coarse; }
|
|
|
|
friend class HbrFace<T>;
|
|
|
|
private:
|
|
HbrHalfedge<T>* opposite;
|
|
// Index of incident vertex
|
|
int incidentVertex;
|
|
|
|
// Index of subdivided vertex child
|
|
int vchild;
|
|
float sharpness;
|
|
|
|
#ifdef HBRSTITCH
|
|
unsigned short stitchccw:1;
|
|
unsigned short raystitchccw:1;
|
|
unsigned short stitchdatavalid:1;
|
|
#endif
|
|
unsigned short coarse:1;
|
|
unsigned short lastedge:1;
|
|
unsigned short firstedge:1;
|
|
|
|
// If m_index = 0, 1, 2 or 3: we are the m_index edge of an
|
|
// incident face with 3 or 4 vertices.
|
|
// If m_index = 4: our incident face has more than 4 vertices, and
|
|
// we must do some extra math to determine what our actual index
|
|
// is. See getIndex()
|
|
unsigned short m_index:3;
|
|
|
|
// Returns the index of the edge relative to its incident face.
|
|
// This relies on knowledge of the face's edge allocation pattern
|
|
int getIndex() const {
|
|
if (m_index < 4) {
|
|
return m_index;
|
|
} else {
|
|
// We allocate room for up to 4 values (to handle tri or
|
|
// quad) in the edges array. If there are more than that,
|
|
// they _all_ go in the faces' extraedges array.
|
|
HbrFace<T>* incidentFace = *(HbrFace<T>**)((char *) this + sizeof(HbrHalfedge<T>));
|
|
return int(((char *) this - incidentFace->extraedges) /
|
|
(sizeof(HbrHalfedge<T>) + sizeof(HbrFace<T>*)));
|
|
}
|
|
}
|
|
|
|
// Returns bitmask indicating whether a given facevarying datum
|
|
// for the edge is infinitely sharp. Each datum has two bits, and
|
|
// if those two bits are set to 3, it means the status has not
|
|
// been computed yet.
|
|
unsigned int *getFVarInfSharp() {
|
|
unsigned int *fvarbits = GetFace()->fvarbits;
|
|
if (fvarbits) {
|
|
int fvarbitsSizePerEdge = ((GetMesh()->GetFVarCount() + 15) / 16);
|
|
return fvarbits + getIndex() * fvarbitsSizePerEdge;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
#ifdef HBRSTITCH
|
|
StitchEdge **getStitchEdges() {
|
|
return GetFace()->stitchEdges + GetMesh()->GetStitchCount() * getIndex();
|
|
}
|
|
#endif
|
|
|
|
#ifdef HBR_ADAPTIVE
|
|
public:
|
|
struct adaptiveFlags {
|
|
unsigned isTransition:1;
|
|
unsigned isTriangleHead:1;
|
|
unsigned isWatertightCritical:1;
|
|
|
|
adaptiveFlags() : isTransition(0),isTriangleHead(0),isWatertightCritical(0) { }
|
|
};
|
|
|
|
adaptiveFlags _adaptiveFlags;
|
|
|
|
bool IsInsideHole() const {
|
|
|
|
HbrFace<T> * left = GetLeftFace();
|
|
if (left and (not left->IsHole()))
|
|
return false;
|
|
|
|
HbrFace<T> * right = GetRightFace();
|
|
if (right and (not right->IsHole()))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool IsTransition() const { return _adaptiveFlags.isTransition; }
|
|
|
|
bool IsTriangleHead() const { return _adaptiveFlags.isTriangleHead; }
|
|
|
|
bool IsWatertightCritical() const { return _adaptiveFlags.isWatertightCritical; }
|
|
#endif
|
|
};
|
|
|
|
template <class T>
|
|
void
|
|
HbrHalfedge<T>::Initialize(HbrHalfedge<T>* opposite, int index, HbrVertex<T>* origin,
|
|
unsigned int *fvarbits, HbrFace<T>* face) {
|
|
HbrMesh<T> *mesh = face->GetMesh();
|
|
if (face->GetNumVertices() <= 4) {
|
|
m_index = index;
|
|
} else {
|
|
m_index = 4;
|
|
// Assumes upstream allocation ensured we have extra storage
|
|
// for pointer to face after the halfedge data structure
|
|
// itself
|
|
*(HbrFace<T>**)((char *) this + sizeof(HbrHalfedge<T>)) = face;
|
|
}
|
|
|
|
this->opposite = opposite;
|
|
incidentVertex = origin->GetID();
|
|
lastedge = (index == face->GetNumVertices() - 1);
|
|
firstedge = (index == 0);
|
|
if (opposite) {
|
|
sharpness = opposite->sharpness;
|
|
#ifdef HBRSTITCH
|
|
StitchEdge **stitchEdges = face->stitchEdges +
|
|
mesh->GetStitchCount() * index;
|
|
for (int i = 0; i < mesh->GetStitchCount(); ++i) {
|
|
stitchEdges[i] = opposite->getStitchEdges()[i];
|
|
}
|
|
stitchccw = opposite->stitchccw;
|
|
raystitchccw = opposite->raystitchccw;
|
|
stitchdatavalid = 0;
|
|
if (stitchEdges && opposite->GetStitchData()) {
|
|
mesh->SetStitchData(this, opposite->GetStitchData());
|
|
stitchdatavalid = 1;
|
|
}
|
|
#endif
|
|
if (fvarbits) {
|
|
const int fvarcount = mesh->GetFVarCount();
|
|
int fvarbitsSizePerEdge = ((fvarcount + 15) / 16);
|
|
memcpy(fvarbits, opposite->getFVarInfSharp(), fvarbitsSizePerEdge * sizeof(unsigned int));
|
|
}
|
|
} else {
|
|
sharpness = 0.0f;
|
|
#ifdef HBRSTITCH
|
|
StitchEdge **stitchEdges = getStitchEdges();
|
|
for (int i = 0; i < mesh->GetStitchCount(); ++i) {
|
|
stitchEdges[i] = 0;
|
|
}
|
|
stitchccw = 1;
|
|
raystitchccw = 1;
|
|
stitchdatavalid = 0;
|
|
#endif
|
|
if (fvarbits) {
|
|
const int fvarcount = mesh->GetFVarCount();
|
|
int fvarbitsSizePerEdge = ((fvarcount + 15) / 16);
|
|
memset(fvarbits, 0xff, fvarbitsSizePerEdge * sizeof(unsigned int));
|
|
}
|
|
}
|
|
}
|
|
|
|
template <class T>
|
|
HbrHalfedge<T>::~HbrHalfedge() {
|
|
Clear();
|
|
}
|
|
|
|
template <class T>
|
|
void
|
|
HbrHalfedge<T>::Clear() {
|
|
if (opposite) {
|
|
opposite->opposite = 0;
|
|
if (vchild != -1) {
|
|
// Transfer ownership of the vchild to the opposite ptr
|
|
opposite->vchild = vchild;
|
|
|
|
HbrVertex<T> *vchildVert = GetMesh()->GetVertex(vchild);
|
|
// Done this way just for assertion sanity
|
|
vchildVert->SetParent(static_cast<HbrHalfedge*>(0));
|
|
vchildVert->SetParent(opposite);
|
|
vchild = -1;
|
|
}
|
|
opposite = 0;
|
|
}
|
|
// Orphan the child vertex
|
|
else if (vchild != -1) {
|
|
HbrVertex<T> *vchildVert = GetMesh()->GetVertex(vchild);
|
|
vchildVert->SetParent(static_cast<HbrHalfedge*>(0));
|
|
vchild = -1;
|
|
}
|
|
}
|
|
|
|
template <class T>
|
|
HbrVertex<T>*
|
|
HbrHalfedge<T>::Subdivide() {
|
|
HbrMesh<T>* mesh = GetMesh();
|
|
if (vchild != -1) return mesh->GetVertex(vchild);
|
|
// Make sure that our opposite doesn't "own" a subdivided vertex
|
|
// already. If it does, use that
|
|
if (opposite && opposite->vchild != -1) return mesh->GetVertex(opposite->vchild);
|
|
HbrVertex<T>* vchildVert = mesh->GetSubdivision()->Subdivide(mesh, this);
|
|
vchild = vchildVert->GetID();
|
|
vchildVert->SetParent(this);
|
|
return vchildVert;
|
|
}
|
|
|
|
template <class T>
|
|
void
|
|
HbrHalfedge<T>::GuaranteeNeighbor() {
|
|
HbrMesh<T>* mesh = GetMesh();
|
|
mesh->GetSubdivision()->GuaranteeNeighbor(mesh, this);
|
|
}
|
|
|
|
// Determines whether an edge is infinitely sharp as far as its
|
|
// facevarying data is concerned. Happens if the faces on both sides
|
|
// disagree on the facevarying data at either of the shared vertices
|
|
// on the edge.
|
|
template <class T>
|
|
bool
|
|
HbrHalfedge<T>::GetFVarInfiniteSharp(int datum) {
|
|
|
|
// Check to see if already initialized
|
|
int intindex = datum >> 4;
|
|
int shift = (datum & 15) << 1;
|
|
unsigned int *fvarinfsharp = getFVarInfSharp();
|
|
unsigned int bits = (fvarinfsharp[intindex] >> shift) & 0x3;
|
|
if (bits != 3) {
|
|
assert (bits != 2);
|
|
return bits ? true : false;
|
|
}
|
|
|
|
// If there is no face varying data it can't be infinitely sharp!
|
|
const int fvarwidth = GetMesh()->GetTotalFVarWidth();
|
|
if (!fvarwidth) {
|
|
bits = ~(0x3 << shift);
|
|
fvarinfsharp[intindex] &= bits;
|
|
if (opposite) opposite->getFVarInfSharp()[intindex] &= bits;
|
|
return false;
|
|
}
|
|
|
|
// If either incident face is missing, it's a geometric boundary
|
|
// edge, and also a facevarying boundary edge
|
|
HbrFace<T>* left = GetLeftFace(), *right = GetRightFace();
|
|
if (!left || !right) {
|
|
bits = ~(0x2 << shift);
|
|
fvarinfsharp[intindex] &= bits;
|
|
if (opposite) opposite->getFVarInfSharp()[intindex] &= bits;
|
|
return true;
|
|
}
|
|
|
|
// Look for the indices on each face which correspond to the
|
|
// origin and destination vertices of the edge
|
|
int lorg = -1, ldst = -1, rorg = -1, rdst = -1, i, nv;
|
|
HbrHalfedge<T>* e;
|
|
e = left->GetFirstEdge();
|
|
nv = left->GetNumVertices();
|
|
for (i = 0; i < nv; ++i) {
|
|
if (e->GetOrgVertex() == GetOrgVertex()) lorg = i;
|
|
if (e->GetOrgVertex() == GetDestVertex()) ldst = i;
|
|
e = e->GetNext();
|
|
}
|
|
e = right->GetFirstEdge();
|
|
nv = right->GetNumVertices();
|
|
for (i = 0; i < nv; ++i) {
|
|
if (e->GetOrgVertex() == GetOrgVertex()) rorg = i;
|
|
if (e->GetOrgVertex() == GetDestVertex()) rdst = i;
|
|
e = e->GetNext();
|
|
}
|
|
assert(lorg >= 0 && ldst >= 0 && rorg >= 0 && rdst >= 0);
|
|
// Compare the facevarying data to some tolerance
|
|
const int startindex = GetMesh()->GetFVarIndices()[datum];
|
|
const int width = GetMesh()->GetFVarWidths()[datum];
|
|
if (!right->GetFVarData(rorg).Compare(left->GetFVarData(lorg), startindex, width, 0.001f) ||
|
|
!right->GetFVarData(rdst).Compare(left->GetFVarData(ldst), startindex, width, 0.001f)) {
|
|
bits = ~(0x2 << shift);
|
|
fvarinfsharp[intindex] &= bits;
|
|
if (opposite) opposite->getFVarInfSharp()[intindex] &= bits;
|
|
return true;
|
|
}
|
|
|
|
bits = ~(0x3 << shift);
|
|
fvarinfsharp[intindex] &= bits;
|
|
if (opposite) opposite->getFVarInfSharp()[intindex] &= bits;
|
|
return false;
|
|
}
|
|
|
|
template <class T>
|
|
bool
|
|
HbrHalfedge<T>::IsFVarInfiniteSharpAnywhere() {
|
|
|
|
if (sharpness > k_Smooth) {
|
|
return true;
|
|
}
|
|
|
|
for (int i = 0; i < GetMesh()->GetFVarCount(); ++i) {
|
|
if (GetFVarInfiniteSharp(i)) return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
template <class T>
|
|
float
|
|
HbrHalfedge<T>::GetFVarSharpness(int datum, bool ignoreGeometry) {
|
|
|
|
if (GetFVarInfiniteSharp(datum)) return k_InfinitelySharp;
|
|
|
|
if (!ignoreGeometry) {
|
|
// If it's a geometrically sharp edge it's going to be a
|
|
// facevarying sharp edge too
|
|
if (sharpness > k_Smooth) {
|
|
SetFVarInfiniteSharp(datum, true);
|
|
return k_InfinitelySharp;
|
|
}
|
|
}
|
|
return k_Smooth;
|
|
}
|
|
|
|
|
|
template <class T>
|
|
std::ostream&
|
|
operator<<(std::ostream& out, const HbrHalfedge<T>& edge) {
|
|
if (edge.IsBoundary()) out << "boundary ";
|
|
out << "edge connecting ";
|
|
if (edge.GetOrgVertex())
|
|
out << *edge.GetOrgVertex();
|
|
else
|
|
out << "(none)";
|
|
out << " to ";
|
|
if (edge.GetDestVertex()) {
|
|
out << *edge.GetDestVertex();
|
|
} else {
|
|
out << "(none)";
|
|
}
|
|
return out;
|
|
}
|
|
|
|
// Sorts half edges by the relative ordering of the incident faces'
|
|
// paths.
|
|
template <class T>
|
|
class HbrHalfedgeCompare {
|
|
public:
|
|
bool operator() (const HbrHalfedge<T>* a, HbrHalfedge<T>* b) const {
|
|
return (a->GetFace()->GetPath() < b->GetFace()->GetPath());
|
|
}
|
|
};
|
|
|
|
template <class T>
|
|
class HbrHalfedgeOperator {
|
|
public:
|
|
virtual void operator() (HbrHalfedge<T> &edge) = 0;
|
|
virtual ~HbrHalfedgeOperator() {}
|
|
};
|
|
|
|
} // end namespace OPENSUBDIV_VERSION
|
|
using namespace OPENSUBDIV_VERSION;
|
|
|
|
} // end namespace OpenSubdiv
|
|
|
|
#endif /* OPENSUBDIV3_HBRHALFEDGE_H */
|