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This change adds simple HbrMesh and FarMesh wrapper classes to osdutil

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and a projectTest example binary to test.  Currently projectTest crashes,
Manuel has been looking into the crash- thanks!
This commit is contained in:
Dirk Van Gelder 2013-10-25 23:24:23 -07:00
parent 404ec9649d
commit 38399a382c
8 changed files with 1410 additions and 1 deletions
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5
examples/CMakeLists.txt
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@ -28,7 +28,10 @@ if( OPENGL_FOUND AND (GLEW_FOUND AND GLFW_FOUND) OR (APPLE AND GLFW_FOUND))
add_subdirectory(glStencilViewer)
add_subdirectory(simpleCpu)
add_subdirectory(limitEval)
add_subdirectory(uvViewer)
add_subdirectory(projectTest)
if (NOT APPLE)
add_subdirectory(uvViewer)
endif()
if(OPENGL_4_3_FOUND AND (NOT APPLE))
# the paintTest example requires GL functionality not available on OSX
add_subdirectory(paintTest)

79
examples/projectTest/CMakeLists.txt Normal file
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@ -0,0 +1,79 @@
#
# Copyright (C) Pixar. All rights reserved.
#
# This license governs use of the accompanying software. If you
# use the software, you accept this license. If you do not accept
# the license, do not use the software.
#
# 1. Definitions
# The terms "reproduce," "reproduction," "derivative works," and
# "distribution" have the same meaning here as under U.S.
# copyright law. A "contribution" is the original software, or
# any additions or changes to the software.
# A "contributor" is any person or entity that distributes its
# contribution under this license.
# "Licensed patents" are a contributor's patent claims that read
# directly on its contribution.
#
# 2. Grant of Rights
# (A) Copyright Grant- Subject to the terms of this license,
# including the license conditions and limitations in section 3,
# each contributor grants you a non-exclusive, worldwide,
# royalty-free copyright license to reproduce its contribution,
# prepare derivative works of its contribution, and distribute
# its contribution or any derivative works that you create.
# (B) Patent Grant- Subject to the terms of this license,
# including the license conditions and limitations in section 3,
# each contributor grants you a non-exclusive, worldwide,
# royalty-free license under its licensed patents to make, have
# made, use, sell, offer for sale, import, and/or otherwise
# dispose of its contribution in the software or derivative works
# of the contribution in the software.
#
# 3. Conditions and Limitations
# (A) No Trademark License- This license does not grant you
# rights to use any contributor's name, logo, or trademarks.
# (B) If you bring a patent claim against any contributor over
# patents that you claim are infringed by the software, your
# patent license from such contributor to the software ends
# automatically.
# (C) If you distribute any portion of the software, you must
# retain all copyright, patent, trademark, and attribution
# notices that are present in the software.
# (D) If you distribute any portion of the software in source
# code form, you may do so only under this license by including a
# complete copy of this license with your distribution. If you
# distribute any portion of the software in compiled or object
# code form, you may only do so under a license that complies
# with this license.
# (E) The software is licensed "as-is." You bear the risk of
# using it. The contributors give no express warranties,
# guarantees or conditions. You may have additional consumer
# rights under your local laws which this license cannot change.
# To the extent permitted under your local laws, the contributors
# exclude the implied warranties of merchantability, fitness for
# a particular purpose and non-infringement.
#
set(PLATFORM_LIBRARIES
${OSD_LINK_TARGET}
)
include_directories(
${PROJECT_SOURCE_DIR}/opensubdiv
${PROJECT_SOURCE_DIR}/regression
${PROJECT_SOURCE_DIR}/examples
)
_add_executable(projectTest
main.cpp
)
target_link_libraries(projectTest
osdutil
${PLATFORM_LIBRARIES}
)
install(TARGETS projectTest DESTINATION ${CMAKE_BINDIR_BASE})

214
examples/projectTest/main.cpp Normal file
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@ -0,0 +1,214 @@
//
// Copyright (C) Pixar. All rights reserved.
//
// This license governs use of the accompanying software. If you
// use the software, you accept this license. If you do not accept
// the license, do not use the software.
//
// 1. Definitions
// The terms "reproduce," "reproduction," "derivative works," and
// "distribution" have the same meaning here as under U.S.
// copyright law. A "contribution" is the original software, or
// any additions or changes to the software.
// A "contributor" is any person or entity that distributes its
// contribution under this license.
// "Licensed patents" are a contributor's patent claims that read
// directly on its contribution.
//
// 2. Grant of Rights
// (A) Copyright Grant- Subject to the terms of this license,
// including the license conditions and limitations in section 3,
// each contributor grants you a non-exclusive, worldwide,
// royalty-free copyright license to reproduce its contribution,
// prepare derivative works of its contribution, and distribute
// its contribution or any derivative works that you create.
// (B) Patent Grant- Subject to the terms of this license,
// including the license conditions and limitations in section 3,
// each contributor grants you a non-exclusive, worldwide,
// royalty-free license under its licensed patents to make, have
// made, use, sell, offer for sale, import, and/or otherwise
// dispose of its contribution in the software or derivative works
// of the contribution in the software.
//
// 3. Conditions and Limitations
// (A) No Trademark License- This license does not grant you
// rights to use any contributor's name, logo, or trademarks.
// (B) If you bring a patent claim against any contributor over
// patents that you claim are infringed by the software, your
// patent license from such contributor to the software ends
// automatically.
// (C) If you distribute any portion of the software, you must
// retain all copyright, patent, trademark, and attribution
// notices that are present in the software.
// (D) If you distribute any portion of the software in source
// code form, you may do so only under this license by including a
// complete copy of this license with your distribution. If you
// distribute any portion of the software in compiled or object
// code form, you may only do so under a license that complies
// with this license.
// (E) The software is licensed "as-is." You bear the risk of
// using it. The contributors give no express warranties,
// guarantees or conditions. You may have additional consumer
// rights under your local laws which this license cannot change.
// To the extent permitted under your local laws, the contributors
// exclude the implied warranties of merchantability, fitness for
// a particular purpose and non-infringement.
//
#include <stdlib.h>
#include <osd/cpuComputeContext.h>
#include <osd/cpuComputeController.h>
#include <osd/cpuEvalLimitContext.h>
#include <osd/cpuEvalLimitController.h>
#include <osd/cpuVertexBuffer.h>
#include <osd/error.h>
#include <osd/mesh.h>
#include <osd/vertex.h>
#include <osdutil/mesh.h>
#include <osdutil/refiner.h>
#include "../common/stopwatch.h"
#include <cfloat>
#include <vector>
#include <fstream>
#include <sstream>
#include <stdlib.h>
#ifdef OPENSUBDIV_HAS_OPENMP
#include <omp.h>
#endif
using namespace OpenSubdiv;
//------------------------------------------------------------------------------
typedef HbrMesh<OsdVertex> OsdHbrMesh;
typedef HbrVertex<OsdVertex> OsdHbrVertex;
typedef HbrFace<OsdVertex> OsdHbrFace;
typedef HbrHalfedge<OsdVertex> OsdHbrHalfedge;
typedef FarMesh<OsdVertex> OsdFarMesh;
typedef FarMeshFactory<OsdVertex> OsdFarMeshFactory;
typedef FarSubdivisionTables<OsdVertex> OsdFarMeshSubdivision;
//------------------------------------------------------------------------------
static void
createOsdMesh(int level)
{
float points[] = { 0.000000, -1.414214, 1.000000,
1.414214, 0.000000, 1.000000,
-1.414214, 0.000000, 1.000000,
0.000000, 1.414214, 1.000000,
-1.414214, 0.000000, -1.000000,
0.000000, 1.414214, -1.000000,
0.000000, -1.414214, -1.000000,
1.414214, 0.000000, -1.000000};
int nverts[] = { 4, 4, 4, 4, 4, 4};
int indices[] = { 0, 1, 3, 2,
2, 3, 5, 4,
4, 5, 7, 6,
6, 7, 1, 0,
1, 7, 5, 3,
6, 0, 2, 4};
// Scheme scheme = kCatmark;
PxOsdUtilSubdivTopology t;
t.name = "TestSubdiv";
for (int i=0; i< (int)(sizeof(nverts)/sizeof(int)); ++i) {
t.nverts.push_back(nverts[i]);
}
for (int i=0; i< (int)(sizeof(indices)/sizeof(int)); ++i) {
t.indices.push_back(indices[i]);
}
t.numVertices = (int)sizeof(points)/(3*sizeof(float));
t.maxLevels = 8;
std::string errorMessage;
PxOsdUtilRefiner refiner;
// Create refiner, passing "false" to adaptive so we'll get
// uniform refinement
if (not refiner.Initialize(t, false, &errorMessage)) {
std::cout << "Refiner creation failed with " << errorMessage << std::endl;
return;
}
std::vector<int> refinedQuads;
if (not refiner.GetRefinedQuads(&refinedQuads, &errorMessage)) {
std::cout << "GetRefinedQuads failed with " << errorMessage << std::endl;
}
std::cout << "Quads = " << refinedQuads.size()/4 << std::endl;
for (int i=0; i<(int)refinedQuads.size(); i+=4) {
std::cout << "(" << refinedQuads[i] <<
", " << refinedQuads[i+1] <<
", " << refinedQuads[i+2] <<
", " << refinedQuads[i+3] <<
")\n";
}
/*
// Push the vertex data:
std::vector<float> pointsVec;
pointsVec.resize(sizeof(points));
for (int i=0; i<(int)sizeof(points); ++i) {
pointsVec[i] = points[i];
}
shape->SetCoarsePositions(pointsVec);
std::vector<float> refinedPositions;
if (not (shape->Refine(2) and
shape->GetPositions(&refinedPositions, &errorMessage) and
shape->GetQuads(&refinedQuads, &errorMessage))) {
std::cout << errorMessage << std::endl;
} else {
std::cout << "Hot damn, it worked.\n";
std::cout << "Positions = " << refinedPositions.size()/3 << std::endl;
for (int i=0; i<(int)refinedPositions.size(); i+=3) {
std::cout << "(" << refinedPositions[i] <<
", " << refinedPositions[i+1] <<
"," << refinedPositions[i+2] << ")\n";
}
if (not shape->WriteRefinedObj("foo.obj", &errorMessage)) {
std::cout << errorMessage << std::endl;
}
}
*/
}
//------------------------------------------------------------------------------
static void
callbackError(OpenSubdiv::OsdErrorType err, const char *message)
{
printf("OsdError: %d\n", err);
printf("%s", message);
}
//------------------------------------------------------------------------------
int main(int, char**) {
OsdSetErrorCallback(callbackError);
createOsdMesh(1);
}

18
opensubdiv/osdutil/CMakeLists.txt
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@ -34,8 +34,26 @@ set(PUBLIC_HEADER_FILES
batch.h
drawItem.h
drawController.h
mesh.h
refiner.h
)
add_library(osdutil
mesh.h
mesh.cpp
refiner.h
refiner.cpp
${INC_FILES}
)
set_target_properties(osdutil PROPERTIES OUTPUT_NAME osdutil CLEAN_DIRECT_OUTPUT 1)
target_link_libraries(
osdutil
${PLATFORM_LIBRARIES}
)
set(DOXY_HEADER_FILES ${PUBLIC_HEADER_FILES})
#-------------------------------------------------------------------------------

540
opensubdiv/osdutil/mesh.cpp Normal file
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@ -0,0 +1,540 @@
#include "mesh.h"
#include <osd/vertex.h>
#include <hbr/catmark.h>
#include <sstream>
using namespace std;
using namespace OpenSubdiv;
static HbrCatmarkSubdivision<OsdVertex> _catmark;
PxOsdUtilSubdivTopology::PxOsdUtilSubdivTopology():
name("noname"),
numVertices(0),
maxLevels(2) // arbitrary, start with a reasonable subdivision level
{
std::cout << "Creating subdiv topology object\n";
}
PxOsdUtilSubdivTopology::~PxOsdUtilSubdivTopology()
{
std::cout << "Destroying subdiv topology object\n";
}
bool
PxOsdUtilSubdivTopology::Initialize(
int numVerticesParam,
const int *nvertsParam, int numFaces,
const int *indicesParam, int indicesLen,
int levels,
string *errorMessage)
{
numVertices = numVerticesParam;
maxLevels = levels;
nverts.resize(numFaces);
for (int i=0; i<numFaces; ++i) {
nverts[i] = nvertsParam[i];
}
indices.resize(indicesLen);
for (int i=0; i<indicesLen; ++i) {
indices[i] = indicesParam[i];
}
return IsValid(errorMessage);
}
bool
PxOsdUtilSubdivTopology::IsValid(string *errorMessage) const
{
if (numVertices == 0) {
if (errorMessage) {
stringstream ss;
ss << "Topology " << name << " has no vertices";
*errorMessage = ss.str();
}
return false;
}
for (int i=0; i<(int)indices.size(); ++i) {
if ((indices[i] < 0) or
(indices[i] >= numVertices)) {
if (errorMessage) {
stringstream ss;
ss << "Topology " << name << " has bad index " << indices[i] << " at index " << i;
*errorMessage = ss.str();
}
return false;
}
}
int totalNumIndices = 0;
for (int i=0; i< (int)nverts.size(); ++i) {
if (nverts[i] < 1) {
if (errorMessage) {
stringstream ss;
ss << "Topology " << name << " has bad nverts " << nverts[i] << " at index " << i;
*errorMessage = ss.str();
}
return false;
}
totalNumIndices += nverts[i];
}
if (totalNumIndices != (int)indices.size()) {
if (errorMessage) {
*errorMessage = "Bad indexing for face topology";
}
return false;
}
std::cout << "\n";
return true;
}
void
PxOsdUtilSubdivTopology::Print() const
{
std::cout << "Mesh " << name << "\n";
std::cout << "\tnumVertices = " << numVertices << "\n";
std::cout << "\tmaxLevels = " << maxLevels << "\n";
std::cout << "\tindices ( " << indices.size() << ") : ";
for (int i=0; i<(int)indices.size(); ++i) {
std::cout << indices[i] << ", ";
}
std::cout << "\n";
std::cout << "\tnverts ( " << nverts.size() << ") : ";
for (int i=0; i<(int)nverts.size(); ++i) {
std::cout << nverts[i] << ", ";
}
std::cout << "\n";
}
PxOsdUtilMesh::PxOsdUtilMesh(
const PxOsdUtilSubdivTopology &topology,
std::string *errorMessage):
_t(topology),
_hmesh(NULL),
_valid(false)
{
if (not topology.IsValid(errorMessage)) {
return;
}
if (_t.fvNames.empty()) {
std::cout << "Creating NON face varying hbrmesh\n";
_hmesh = new HbrMesh<OsdVertex>(&_catmark);
} else {
int fvarcount = (int) _t.fvNames.size();
// For now we only handle 1 float per FV variable.
_fvarwidths.assign(fvarcount, 1);
int startIndex = 0;
for (int fvarindex = 0; fvarindex < fvarcount; ++fvarindex) {
_fvarindices.push_back(startIndex);
_fvaroffsets[_t.fvNames[fvarindex]] = startIndex;
startIndex += _fvarwidths[fvarindex];
}
std::cout << "Creating face varying hbrmesh\n";
_hmesh = new HbrMesh<OsdVertex>(
&_catmark, fvarcount, &_fvarindices[0],
&_fvarwidths[0], fvarcount);
}
OsdVertex v;
for (int i = 0; i < _t.numVertices; ++i) {
HbrVertex<OsdVertex>* hvert = _hmesh->NewVertex(i, OsdVertex());
if (!hvert) {
if (errorMessage)
*errorMessage = "Unable to create call NewVertex for Hbr";
return;
}
}
std::cout << "Created " << _t.numVertices << " vertices for hbr mesh\n";
// Sanity check
int fvarWidth = _hmesh->GetTotalFVarWidth();
std::cout << "Total fvarWidth = " << fvarWidth << "\n";
if (_t.fvData.size() < _t.nverts.size() * fvarWidth ||
fvarWidth != (int)_t.fvNames.size()) {
/*XXX if (errorMessage)
*errorMessage = TfStringPrintf(
"Incorrectly sized face data: name count = %d, "
"data width = %d, face count = %d, total data size = %d.",
(int) _t.fvNames.size(),
fvarWidth,
(int) _t.nverts.size(),
(int) _t.fvData.size());
*/
return;
}
// ptex index is not necessarily the same as the face index
int ptexIndex = 0;
// face-vertex count offset
int fvcOffset = 0;
int facesCreated = 0;
for (int i=0; i<(int)_t.nverts.size(); ++i) {
int nv = _t.nverts[i];
/*XXX No loop yet
if ((_scheme==kLoop) and (nv!=3)) {
if (errorMessage)
*errorMessage = TfStringPrintf(
"Trying to create a Loop surbd with non-triangle face\n");
return false;
}
*/
for(int j=0;j<nv;j++) {
HbrVertex<OsdVertex> * origin =
_hmesh->GetVertex(_t.indices[fvcOffset + j]);
HbrVertex<OsdVertex> * destination =
_hmesh->GetVertex(_t.indices[fvcOffset + (j+1)%nv] );
HbrHalfedge<OsdVertex> * opposite = destination->GetEdge(origin);
if(origin==NULL || destination==NULL) {
if (errorMessage)
*errorMessage =
" An edge was specified that connected a nonexistent vertex";
return;
}
if(origin == destination) {
if (errorMessage)
*errorMessage =
" An edge was specified that connected a vertex to itself";
return;
}
if(opposite && opposite->GetOpposite() ) {
if (errorMessage)
*errorMessage =
" A non-manifold edge incident to more than 2 faces was found";
return;
}
if(origin->GetEdge(destination)) {
if (errorMessage)
*errorMessage =
" An edge connecting two vertices was specified more than once."
" It's likely that an incident face was flipped\n";
return;
}
}
std::cout << "Creating face with indices at offset " << fvcOffset << " ";
for (int k=0; k<nv; ++k) {
std::cout << _t.indices[fvcOffset+k] << " ";
}
std::cout << "\n";
HbrFace<OsdVertex>* hface = _hmesh->NewFace(
nv, &(_t.indices[fvcOffset]), 0);
++facesCreated;
if (!hface) {
if (errorMessage)
*errorMessage = "Unable to create Hbr face";
return;
}
// The ptex index isn't a straight-up polygon index; rather,
// it's an index into a "minimally quadrangulated" base mesh.
// Take all non-rect polys and subdivide them once.
hface->SetPtexIndex(ptexIndex);
ptexIndex += (nv == 4) ? 1 : nv;
// prideout: 3/21/2013 - Inspired by "GetFVarData" in examples/mayaViewer/hbrUtil.cpp
if (!_t.fvNames.empty()) {
std::cout << "found fvNames!\n";
const float* faceData = &(_t.fvData[fvcOffset*fvarWidth]);
for (int fvi = 0; fvi < nv; ++fvi) {
int vindex = _t.indices[fvi + fvcOffset];
HbrVertex<OsdVertex>* v = _hmesh->GetVertex(vindex);
HbrFVarData<OsdVertex>& fvarData = v->GetFVarData(hface);
if (!fvarData.IsInitialized()) {
fvarData.SetAllData(fvarWidth, faceData);
} else if (!fvarData.CompareAll(fvarWidth, faceData)) {
// If data exists for this face vertex, but is different
// (e.g. we're on a UV seam) create another fvar datum
HbrFVarData<OsdVertex>& fvarData = v->NewFVarData(hface);
fvarData.SetAllData(fvarWidth, faceData);
}
// Advance pointer to next set of face-varying data
faceData += fvarWidth;
}
}
fvcOffset += nv;
}
std::cout << "Create " << facesCreated << " faces in hbrMesh\n";
_ProcessTagsAndFinishMesh(
_hmesh, _t.tagData.tags, _t.tagData.numArgs, _t.tagData.intArgs,
_t.tagData.floatArgs, _t.tagData.stringArgs);
_valid = true;
}
PxOsdUtilMesh::~PxOsdUtilMesh()
{
std::cout << "Deleting PxOsdUtilMesh\n";
delete _hmesh;
}
// ProcessTagsAndFinishMesh(...)
// This translates prman-style lists of tags into OSD method calls.
//
// prideout: 3/19/2013 - since tidSceneRenderer has a similar
// function, we should factor this into an amber utility, or
// into osd itself. I'd vote for the latter. It already has
// a shapeUtils in its regression suite that almost fits the bill.
//
// prideout: 3/19/2013 - edits are not yet supported.
void
PxOsdUtilMesh::_ProcessTagsAndFinishMesh(
HbrMesh<OsdVertex> *mesh,
const vector<string> &tags,
const vector<int> &numArgs,
const vector<int> &intArgs,
const vector<float> &floatArgs,
const vector<string> &stringArgs)
{
mesh->SetInterpolateBoundaryMethod(HbrMesh<OsdVertex>::k_InterpolateBoundaryEdgeOnly);
const int* currentInt = &intArgs[0];
const float* currentFloat = &floatArgs[0];
const string* currentString = &stringArgs[0];
// TAGS (crease, corner, hole, smooth triangles, edits(vertex,
// edge, face), creasemethod, facevaryingpropagatecorners, interpolateboundary
for(int i = 0; i < (int)tags.size(); ++i){
const char * tag = tags[i].c_str();
int nint = numArgs[3*i];
int nfloat = numArgs[3*i+1];
int nstring = numArgs[3*i+2];
// XXX could use tokens here to reduce string matching overhead
if(strcmp(tag, "interpolateboundary") == 0) {
// Interp boundaries
assert(nint == 1);
switch(currentInt[0]) {
case 0:
mesh->SetInterpolateBoundaryMethod(HbrMesh<OsdVertex>::k_InterpolateBoundaryNone);
break;
case 1:
mesh->SetInterpolateBoundaryMethod(HbrMesh<OsdVertex>::k_InterpolateBoundaryEdgeAndCorner);
break;
case 2:
mesh->SetInterpolateBoundaryMethod(HbrMesh<OsdVertex>::k_InterpolateBoundaryEdgeOnly);
break;
default:
/*XXX
TF_WARN("Subdivmesh contains unknown interpolate boundary method: %d\n",
currentInt[0]);
*/
break;
}
// Processing of this tag is done in mesh->Finish()
} else if(strcmp(tag, "crease") == 0) {
for(int j = 0; j < nint-1; ++j) {
// Find the appropriate edge
HbrVertex<OsdVertex>* v = mesh->GetVertex(currentInt[j]);
HbrVertex<OsdVertex>* w = mesh->GetVertex(currentInt[j+1]);
HbrHalfedge<OsdVertex>* e = NULL;
if(v && w) {
e = v->GetEdge(w);
if(!e) {
// The halfedge might be oriented the other way
e = w->GetEdge(v);
}
}
if(!e) {
/*XXX
TF_WARN("Subdivmesh has non-existent sharp edge (%d,%d).\n",
currentInt[j], currentInt[j+1]);
*/
} else {
e->SetSharpness(std::max(0.0f, ((nfloat > 1) ? currentFloat[j] : currentFloat[0])));
}
}
} else if(strcmp(tag, "corner") == 0) {
for(int j = 0; j < nint; ++j) {
HbrVertex<OsdVertex>* v = mesh->GetVertex(currentInt[j]);
if(v) {
v->SetSharpness(std::max(0.0f, ((nfloat > 1) ? currentFloat[j] : currentFloat[0])));
} else {
/*XXX
TF_WARN("Subdivmesh has non-existent sharp vertex %d.\n", currentInt[j]);
*/
}
}
} else if(strcmp(tag, "hole") == 0) {
for(int j = 0; j < nint; ++j) {
HbrFace<OsdVertex>* f = mesh->GetFace(currentInt[j]);
if(f) {
f->SetHole();
} else {
/*XXX
TF_WARN("Subdivmesh has hole at non-existent face %d.\n",
currentInt[j]);
*/
}
}
} else if(strcmp(tag, "facevaryinginterpolateboundary") == 0) {
switch(currentInt[0]) {
case 0:
mesh->SetFVarInterpolateBoundaryMethod(HbrMesh<OsdVertex>::k_InterpolateBoundaryNone);
break;
case 1:
mesh->SetFVarInterpolateBoundaryMethod(HbrMesh<OsdVertex>::k_InterpolateBoundaryEdgeAndCorner);
break;
case 2:
mesh->SetFVarInterpolateBoundaryMethod(HbrMesh<OsdVertex>::k_InterpolateBoundaryEdgeOnly);
break;
case 3:
mesh->SetFVarInterpolateBoundaryMethod(HbrMesh<OsdVertex>::k_InterpolateBoundaryAlwaysSharp);
break;
default:
/*XXX
TF_WARN("Subdivmesh contains unknown facevarying interpolate "
"boundary method: %d.\n", currentInt[0]);
*/
break;
}
} else if(strcmp(tag, "smoothtriangles") == 0) {
// Do nothing - CatmarkMesh should handle it
} else if(strcmp(tag, "creasemethod") == 0) {
if(nstring < 1) {
/*XXX
TF_WARN("Creasemethod tag missing string argument on SubdivisionMesh.\n");
*/
} else {
HbrSubdivision<OsdVertex>* subdivisionMethod = mesh->GetSubdivision();
if(strcmp(currentString->c_str(), "normal") == 0) {
subdivisionMethod->SetCreaseSubdivisionMethod(
HbrSubdivision<OsdVertex>::k_CreaseNormal);
} else if(strcmp(currentString->c_str(), "chaikin") == 0) {
subdivisionMethod->SetCreaseSubdivisionMethod(
HbrSubdivision<OsdVertex>::k_CreaseChaikin);
} else {
/*XXX
TF_WARN("Creasemethod tag specifies unknown crease "
"subdivision method '%s' on SubdivisionMesh.\n",
currentString->c_str());
*/
}
}
} else if(strcmp(tag, "facevaryingpropagatecorners") == 0) {
if(nint != 1) {
/*XXX
TF_WARN("Expecting single integer argument for "
"\"facevaryingpropagatecorners\" on SubdivisionMesh.\n");
*/
} else {
mesh->SetFVarPropagateCorners(currentInt[0] != 0);
}
} else if(strcmp(tag, "vertexedit") == 0
|| strcmp(tag, "edgeedit") == 0) {
// XXX DO EDITS
/*XXX
TF_WARN("vertexedit and edgeedit not yet supported.\n");
*/
} else {
/*XXX
// Complain
TF_WARN("Unknown tag: %s.\n", tag);
*/
}
// update the tag data pointers
currentInt += nint;
currentFloat += nfloat;
currentString += nstring;
}
std::cout << "Finishing mesh\n";
mesh->Finish();
}
// Interleave the face-varying sets specified by "names", adding
// floats into the "fvdata" vector. The number of added floats is:
// names.size() * NumRefinedFaces * 4
void
PxOsdUtilMesh::GetRefinedFVData(
int level, const vector<string>& names, vector<float>* outdata)
{
// First some sanity checking.
if (!outdata) {
return;
}
for (int i=0; i<(int)names.size(); ++i) {
const string &name = names[i];
if (_fvaroffsets.find(name) == _fvaroffsets.end()) {
/* XXX
printf("Can't find facevarying variable %s\n", name.c_str());
*/
return;
}
}
// Fetch *all* faces; this includes all subdivision levels.
vector<HbrFace<OsdVertex> *> faces;
_hmesh->GetFaces(std::back_inserter(faces));
// Iterate through all faces, filtering on the requested subdivision level.
for (int i=0; i<(int)faces.size(); ++i) {
HbrFace<OsdVertex>* face = faces[i];
if (face->GetDepth() != level) {
continue;
}
int ncorners = face->GetNumVertices();
for (int corner = 0; corner < ncorners; ++corner) {
HbrFVarData<OsdVertex>& fvariable = face->GetFVarData(corner);
for (int j=0; j<(int)names.size(); ++j) {
const string &name = names[j];
int offset = _fvaroffsets[name];
const float* data = fvariable.GetData(offset);
outdata->push_back(*data);
}
}
}
}

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#ifndef PX_OSD_UTIL_MESH_H
#define PX_OSD_UTIL_MESH_H
#include <hbr/mesh.h>
#include <osd/vertex.h>
#include <string>
#include <map>
// A value struct that holds annotations on a subdivision surface
// such as creases, boundaries, holes, corners, hierarchical edits, etc.
//
// For OpenSubdiv documentation on tags, see:
// See http://graphics.pixar.com/opensubdiv/docs/subdivision_surfaces.html#hierarchical-edits
//
struct PxOsdUtilTagData {
std::vector<std::string> tags;
std::vector<int> numArgs;
std::vector<int> intArgs;
std::vector<float> floatArgs;
std::vector<std::string> stringArgs;
};
// A value struct intended to hold within it topology for the base mesh
// of a subdivision surface, and any annotation tags.
// It is used to initialize classes that create and operate on subdivs.
//
class PxOsdUtilSubdivTopology {
public:
PxOsdUtilSubdivTopology();
~PxOsdUtilSubdivTopology();
// XXX Would be great for these members to be private with accessors
std::string name;
int numVertices;
int maxLevels;
std::vector<int> indices;
std::vector<int> nverts;
std::vector<std::string> vvNames;
std::vector<std::string> fvNames;
std::vector<float> fvData;
PxOsdUtilTagData tagData;
// Initialize using raw types.
//
// This is useful for automated tests initializing with data like:
// int nverts[] = { 4, 4, 4, 4, 4, 4};
//
bool Initialize(
int numVertices,
const int *nverts, int numFaces,
const int *indices, int indicesLen,
int levels,
std::string *errorMessage);
// checks indices etc to ensure that mesh isn't in a
// broken state. Returns false on error, and will populate
// errorMessage (if non-NULL) with a descriptive error message
bool IsValid(std::string *errorMessage = NULL) const;
// for debugging, print the contents of the topology to stdout
void Print() const;
};
// This class is reponsible for taking a topological description of a mesh
// defined by PxOsdUtilSubdivTopology and turn that into a halfedge mesh
// with detailed connectivity information for mesh traversal. A PxOsdUtilMesh
// object is used for uniform and feature adaptive refinement of subdivision
// surfaces (subdivs), which is itself a requirement for fast run-time
// evaluation of subdivs.
//
class PxOsdUtilMesh {
public:
PxOsdUtilMesh(
const PxOsdUtilSubdivTopology &topology,
std::string *errorMessage = NULL);
~PxOsdUtilMesh();
// Fetch the face varying attribute values on refined quads
// Traverse the hbrMesh gathering face varying data created
// by a refiner.
// XXX: this assumes uniform subdivision, should be moved
// into uniformRefiner?
void GetRefinedFVData(int subdivisionLevel,
const std::vector<std::string>& names,
std::vector<float>* fvdata);
OpenSubdiv::HbrMesh<OpenSubdiv::OsdVertex> *GetHbrMesh() { return _hmesh;}
bool IsValid() { return _valid;}
const std::string &GetName() { return _name;}
const PxOsdUtilSubdivTopology &GetTopology() const {return _t;}
private:
const PxOsdUtilSubdivTopology &_t;
std::vector<int> _fvarwidths;
std::vector<int> _fvarindices;
std::map<std::string, int> _fvaroffsets;
OpenSubdiv::HbrMesh<OpenSubdiv::OsdVertex> *_hmesh;
std::string _name;
bool _valid;
static void _ProcessTagsAndFinishMesh(
OpenSubdiv::HbrMesh<OpenSubdiv::OsdVertex> *mesh,
const std::vector<std::string> &tags,
const std::vector<int> &numArgs,
const std::vector<int> &intArgs,
const std::vector<float> &floatArgs,
const std::vector<std::string> &stringArgs);
};
#endif /* PX_OSD_UTIL_MESH_H */

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#include <far/meshFactory.h>
#include "refiner.h"
#include <osd/vertex.h>
#include <fstream>
using namespace OpenSubdiv;
using namespace std;
//------------------------------------------------------------------------------
// The simplest constructor, only point positions and polygonal
// mesh topology
PxOsdUtilRefiner::PxOsdUtilRefiner():
_adaptive(false),
_mesh(NULL),
_farMesh(NULL),
_patchParamTable(NULL),
_firstVertexOffset(0),
_numRefinedVerts(0),
_numUniformQuads(0),
_numPatches(0),
_level(1),
_isRefined(false)
{
}
bool
PxOsdUtilRefiner::Initialize(
const PxOsdUtilSubdivTopology &topology,
bool adaptive,
string *errorMessage)
{
std::cout << "Initializing refiner\n";
if (not topology.IsValid(errorMessage)) {
std::cout << "Topology invalid:\n\t" << *errorMessage << "\n";
topology.Print();
return false;
} else {
std::cout << "Topology is valid\n";
}
_mesh = new PxOsdUtilMesh(topology, errorMessage);
std::cout << "\tCreated _mesh in refiner\n";
if (not _mesh->IsValid()) {
std::cout << "Invalid mesh\n";
return false;
}
const PxOsdUtilSubdivTopology &t = _mesh->GetTopology();
if (adaptive) {
std::cout << "\tAdaptive mesh for refiner\n";
FarMeshFactory<OsdVertex> adaptiveMeshFactory(
_mesh->GetHbrMesh(), t.maxLevels, true);
_farMesh = adaptiveMeshFactory.Create();
} else {
std::cout << "\tUniform mesh for refiner, maxLevels = " << t.maxLevels << "\n";
HbrMesh<OsdVertex> *hmesh = _mesh->GetHbrMesh();
t.Print();
std::cout << "\tHbr mesh has faces " << hmesh->GetNumFaces() << " " << hmesh->GetNumCoarseFaces() << " and vertices " <<
hmesh->GetNumVertices() << ", disconnected = " <<
hmesh->GetNumDisconnectedVertices() << "\n";
hmesh->PrintStats(std::cout);
// create the quad tables to include all levels by specifying
// firstLevel as 1
FarMeshFactory<OsdVertex> uniformMeshFactory(
_mesh->GetHbrMesh(), t.maxLevels, false, /*firstLevel=*/1);
_farMesh = uniformMeshFactory.Create();
std::cout << "\tUniform farmesh created with " << t.maxLevels << "\n";
}
//
// Now that we've created table driven subdivision data structures
// needed for refinement, grab and cache specific values for
// later fast lookup.
//
// Subdivision tables describe the addition steps with coefficients
// needed to perform subdivision
const FarSubdivisionTables<OsdVertex>* ftable =
_farMesh->GetSubdivisionTables();
// Find quads array at _level
const FarPatchTables * ptables = _farMesh->GetPatchTables();
const FarPatchTables::PatchArrayVector & parrays =
ptables->GetPatchArrayVector();
if (_level > (int)parrays.size()) {
/*XXX
*errorMessage = TfStringPrintf(
"Invalid size of patch array %d %d\n",
_level, (int)parrays.size());;
*/
return false;
}
// parrays doesn't contain base mesh, so it starts with level==1
const FarPatchTables::PatchArray & parray = parrays[_level-1];
_patchParamTable = &(ptables->GetPatchParamTable());
// Global index of the first point in this array
_firstVertexOffset = ftable->GetFirstVertexOffset(_level);
// Global index of the first face (patch) in this array
_firstPatchOffset = parray.GetPatchIndex();
_numRefinedVerts = (int) ftable->GetNumVertices(_level);
std::cout << "refiner has " << _numRefinedVerts << " refined verts\n";
if (adaptive) {
_numPatches = (int) parray.GetNumPatches();
} else {
_numUniformQuads = (int) parray.GetNumPatches();
}
_isRefined = true;
return true;
}
bool
PxOsdUtilRefiner::GetRefinedQuads(
vector<int>* quads,
string *errorMessage) const
{
if (!_isRefined) {
if (errorMessage) {
*errorMessage = "GetQuads: Mesh has not been refined.";
}
return false;
}
if (_adaptive) {
if (errorMessage) {
*errorMessage = "GetQuads: only supports uniform subdivision.";
}
return false;
}
if (!quads || (_numUniformQuads == 0)) {
return false;
}
quads->resize(_numUniformQuads * 4);
const FarPatchTables * ptables = _farMesh->GetPatchTables();
const unsigned int *quadIndices = ptables->GetFaceVertices(_level);
for (int i=0; i<_numUniformQuads*4; ++i) {
(*quads)[i] = quadIndices[i] - _firstVertexOffset;
}
return true;
}
// Inverse of OpenSubdiv::FarPatchParam::BitField::Normalize
static void
_InverseNormalize(OpenSubdiv::FarPatchParam::BitField bf, float& u, float& v)
{
float frac = bf.GetParamFraction();
float pu = (float) bf.GetU() * frac;
float pv = (float) bf.GetV() * frac;
u = u * frac + pu;
v = v * frac + pv;
}
// Inverse of OpenSubdiv::FarPatchParam::BitField::Rotate
static void
_InverseRotate(OpenSubdiv::FarPatchParam::BitField bf, float& u, float& v)
{
switch (bf.GetRotation()) {
case 0 : break;
case 1 : { float tmp=u; u=1.0f-v; v=tmp; } break;
case 2 : { u=1.0f-u; v=1.0f-v; } break;
case 3 : { float tmp=v; v=1.0f-u; u=tmp; } break;
}
}
bool
PxOsdUtilRefiner::GetRefinedPtexUvs(vector<float>* subfaceUvs,
vector<int>* ptexIndices,
string *errorMessage) const
{
if (!_isRefined) {
if (errorMessage) {
*errorMessage = "GetRefinedPtexUvs: Mesh has not been refined.";
}
return false;
}
if (_adaptive) {
if (errorMessage) {
*errorMessage = "GetRefinedPtexUvs: only supports uniform subdivision.";
}
return false;
}
subfaceUvs->resize(_numUniformQuads * 4);
vector<float>::iterator uvIt = subfaceUvs->begin();
ptexIndices->resize(_numUniformQuads);
vector<int>::iterator idIt = ptexIndices->begin();
const FarPatchTables * ptables = _farMesh->GetPatchTables();
const FarPatchTables::PatchArrayVector & parrays =
ptables->GetPatchArrayVector();
if (_level > (int)parrays.size()) {
if (errorMessage)
*errorMessage = "Invalid size of patch array";
}
const FarPatchTables::PatchArray & parray = parrays[_level-1];
const FarPatchTables::PatchParamTable& paramTable =
ptables->GetPatchParamTable();
for (int refinedIndex = 0; refinedIndex < _numUniformQuads;
++refinedIndex) {
const OpenSubdiv::FarPatchParam& param =
paramTable[parray.GetPatchIndex() + refinedIndex];
OpenSubdiv::FarPatchParam::BitField bf = param.bitField;
float u0 = 0;
float v0 = 0;
_InverseRotate(bf, u0, v0);
_InverseNormalize(bf, u0, v0);
float u1 = 1;
float v1 = 1;
_InverseRotate(bf, u1, v1);
_InverseNormalize(bf, u1, v1);
*idIt++ = param.faceIndex;
*uvIt++ = u0;
*uvIt++ = v0;
*uvIt++ = u1;
*uvIt++ = v1;
}
return true;
}
PxOsdUtilRefiner::~PxOsdUtilRefiner() {
if (_mesh)
delete _mesh;
if (_farMesh)
delete _farMesh;
}
const std::string &
PxOsdUtilRefiner::GetName()
{
if (_mesh) {
return _mesh->GetName();
} else {
static std::string bogus("bogus");
return bogus;
}
}
OpenSubdiv::HbrMesh<OpenSubdiv::OsdVertex>*
PxOsdUtilRefiner::GetHbrMesh()
{
if (_mesh) {
return _mesh->GetHbrMesh();
} else {
return NULL;
}
}

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#ifndef PXOSDUTIL_REFINER_H
#define PXOSDUTIL_REFINER_H
#include "mesh.h"
#include <string>
#include <vector>
#include <osd/cpuVertexBuffer.h>
#include <osd/cpuComputeContext.h>
#include <far/mesh.h>
//----------------------------------------------------------------------------
// A simple class that wraps several OpenSubdiv classes for tessellating
// a subdivision surface into quads and extracting position and topology
// data. Single and multithreaded CPU evaluation is supported.
//
// At initialization time this class takes polygonal mesh topology as
// vectors of ints, constructs an HbrMesh from that with topology checking
// and does uniform subdivision on that to make a FarMesh.
//
// At runtime Osd vertex buffers, compute controllers, and compute contexts
// are used for fast evaluation of the surface given the FarMesh.
//----------------------------------------------------------------------------
class PxOsdUtilRefiner {
public:
PxOsdUtilRefiner();
~PxOsdUtilRefiner();
// Returns false on error. If errorMessage is non-NULL it'll
// be populated upon error.
//
// If successful the HbrMesh and FarMesh will be created, and
// all variables will be populated for later calls to Refine.
//
bool Initialize(
const PxOsdUtilSubdivTopology &topology, bool adaptive,
std::string *errorMessage = NULL);
// Fetch the topology of the post-refined mesh. The "quads" vector
// will be filled with 4 ints per quad which index into a vector
// of positions.
bool GetRefinedQuads(std::vector<int>* quads,
std::string *errorMessage = NULL) const;
// Fetch the U/V coordinates of the refined quads in the U/V space
// of their parent coarse face
bool GetRefinedPtexUvs(std::vector<float>* subfaceUvs,
std::vector<int>* ptexIndices,
std::string *errorMessage = NULL) const;
// Fetch the face varying attribute values on refined quads
// Calls through to the lower level mesh class to extract
// face varying data from hbr.
void GetRefinedFVData(int subdivisionLevel,
const std::vector<std::string>& names,
std::vector<float>* fvdata) {
_mesh->GetRefinedFVData(subdivisionLevel, names, fvdata);
}
// Const access to far mesh
const OpenSubdiv::FarMesh<OpenSubdiv::OsdVertex>* GetFarMesh() {
return _farMesh;
}
const std::string &GetName();
bool GetAdaptive() { return _adaptive; }
OpenSubdiv::HbrMesh<OpenSubdiv::OsdVertex> *GetHbrMesh();
const PxOsdUtilSubdivTopology &GetTopology() const {return _mesh->GetTopology();}
bool IsRefined() {return _isRefined;}
int GetNumRefinedVertices() { return _numRefinedVerts;}
int GetFirstVertexOffset() { return _firstVertexOffset;}
private:
// If true, feature adaptive refinement is used and _farMesh
// is populated with bspline and gregory patches.
// if false, uniform refinement is used by subdividing the entire
// mesh _level times.
bool _adaptive;
// The next block of member variables are the OpenSubdiv meshe
// classes used to generate the refined subdivision surface
//
// The lowest level mesh, it definies the polygonal topology
// and is used for refinement.
PxOsdUtilMesh *_mesh;
// A mesh of patches (adaptive), or quads (uniform) generated
// by performing feature adaptive or uniform subdivision on the hbrMesh.
// Uniform and adaptive each get their own far mesh as uniform and
// adaptive code in far result in very different meshes
OpenSubdiv::FarMesh<OpenSubdiv::OsdVertex>* _farMesh;
// Pointer to patch parameters stored within _farMesh.
// These describe additional per-patch information, used here to
// extract the U/V values at the corners of each tessellated quad.
/// XXX: Maybe not cache, get from far mesh each time?
const OpenSubdiv::FarPatchTables::PatchParamTable* _patchParamTable;
// Cached counts within _farMesh
/// XXX: Maybe not cache, get from far mesh each time?
int _firstVertexOffset;
int _firstPatchOffset;
int _numRefinedVerts;
int _numUniformQuads; // zero if adaptive = true
int _numPatches; // zero if adaptive = false
int _level;
bool _isRefined;
};
#endif /* PXOSDUTIL_REFINER_H */