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//
// Copyright 2021 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.
//
#include "../../../regression/common/far_utils.h"
#include <opensubdiv/far/topologyRefiner.h>
#include <opensubdiv/far/topologyDescriptor.h>
#include <cstdio>
#include <cstring>
#include <fstream>
#include <sstream>
// Utilities local to this tutorial:
namespace tutorial {
using namespace OpenSubdiv;
//
// Create a TopologyRefiner from default geometry:
//
Far::TopologyRefiner *
dfltTopologyRefiner(std::vector<float> & posVector,
std::vector<float> & uvVector) {
//
// Default topology and positions for a cube:
//
int dfltNumFaces = 6;
int dfltNumVerts = 8;
int dfltNumUVs = 16;
int dfltFaceSizes[6] = { 4, 4, 4, 4, 4, 4 };
int dfltFaceVerts[24] = { 0, 1, 3, 2,
2, 3, 5, 4,
4, 5, 7, 6,
6, 7, 1, 0,
1, 7, 5, 3,
6, 0, 2, 4 };
float dfltPositions[8][3] = {{ -0.5f, -0.5f, 0.5f },
{ 0.5f, -0.5f, 0.5f },
{ -0.5f, 0.5f, 0.5f },
{ 0.5f, 0.5f, 0.5f },
{ -0.5f, 0.5f, -0.5f },
{ 0.5f, 0.5f, -0.5f },
{ -0.5f, -0.5f, -0.5f },
{ 0.5f, -0.5f, -0.5f }};
int dfltFaceFVars[24] = { 9, 10, 14, 13,
4, 0, 1, 5,
5, 1, 2, 6,
6, 2, 3, 7,
10, 11, 15, 14,
8, 9, 13, 12 };
float dfltUVs[16][2] = {{ 0.05f, 0.05f },
{ 0.35f, 0.15f },
{ 0.65f, 0.15f },
{ 0.95f, 0.05f },
{ 0.05f, 0.35f },
{ 0.35f, 0.45f },
{ 0.65f, 0.45f },
{ 0.95f, 0.35f },
{ 0.05f, 0.65f },
{ 0.35f, 0.55f },
{ 0.65f, 0.55f },
{ 0.95f, 0.65f },
{ 0.05f, 0.95f },
{ 0.35f, 0.85f },
{ 0.65f, 0.85f },
{ 0.95f, 0.95f }};
posVector.resize(8 * 3);
std::memcpy(&posVector[0], dfltPositions, 8 * 3 * sizeof(float));
uvVector.resize(16 * 2);
std::memcpy(&uvVector[0], dfltUVs, 16 * 2 * sizeof(float));
//
// Initialize a Far::TopologyDescriptor, from which to create
// the Far::TopologyRefiner:
//
typedef Far::TopologyDescriptor Descriptor;
Descriptor::FVarChannel uvChannel;
uvChannel.numValues = dfltNumUVs;
uvChannel.valueIndices = dfltFaceFVars;
Descriptor topDescriptor;
topDescriptor.numVertices = dfltNumVerts;
topDescriptor.numFaces = dfltNumFaces;
topDescriptor.numVertsPerFace = dfltFaceSizes;
topDescriptor.vertIndicesPerFace = dfltFaceVerts;
topDescriptor.numFVarChannels = 1;
topDescriptor.fvarChannels = &uvChannel;
Sdc::SchemeType schemeType = Sdc::SCHEME_CATMARK;
Sdc::Options schemeOptions;
schemeOptions.SetVtxBoundaryInterpolation(
Sdc::Options::VTX_BOUNDARY_EDGE_ONLY);
schemeOptions.SetFVarLinearInterpolation(
Sdc::Options::FVAR_LINEAR_CORNERS_ONLY);
typedef Far::TopologyRefinerFactory<Descriptor> RefinerFactory;
Far::TopologyRefiner * topRefiner =
RefinerFactory::Create(topDescriptor,
RefinerFactory::Options(schemeType, schemeOptions));
assert(topRefiner);
return topRefiner;
}
//
// Create a TopologyRefiner from a specified Obj file:
//
Far::TopologyRefiner *
readTopologyRefiner(std::string const & objFileName,
Sdc::SchemeType schemeType,
std::vector<float> & posVector,
std::vector<float> & uvVector) {
const char * filename = objFileName.c_str();
const Shape * shape = 0;
std::ifstream ifs(filename);
if (ifs) {
std::stringstream ss;
ss << ifs.rdbuf();
ifs.close();
std::string shapeString = ss.str();
shape = Shape::parseObj(
shapeString.c_str(), ConvertSdcTypeToShapeScheme(schemeType), false);
if (shape == 0) {
fprintf(stderr,
"Error: Cannot create Shape from Obj file '%s'\n", filename);
return 0;
}
} else {
fprintf(stderr, "Error: Cannot open Obj file '%s'\n", filename);
return 0;
}
Sdc::SchemeType sdcType = GetSdcType(*shape);
Sdc::Options sdcOptions = GetSdcOptions(*shape);
Far::TopologyRefiner * refiner = Far::TopologyRefinerFactory<Shape>::Create(
*shape, Far::TopologyRefinerFactory<Shape>::Options(sdcType, sdcOptions));
if (refiner == 0) {
fprintf(stderr,
"Error: Unable to construct TopologyRefiner from Obj file '%s'\n",
filename);
return 0;
}
int numVertices = refiner->GetNumVerticesTotal();
posVector.resize(numVertices * 3);
std::memcpy(&posVector[0], &shape->verts[0], 3*numVertices*sizeof(float));
uvVector.resize(0);
if (refiner->GetNumFVarChannels()) {
int numUVs = refiner->GetNumFVarValuesTotal(0);
uvVector.resize(numUVs * 2);
std::memcpy(&uvVector[0], &shape->uvs[0], 2 * numUVs*sizeof(float));
}
delete shape;
return refiner;
}
Far::TopologyRefiner *
createTopologyRefiner(std::string const & objFileName,
Sdc::SchemeType schemeType,
std::vector<float> & posVector,
std::vector<float> & uvVector) {
if (objFileName.empty()) {
return dfltTopologyRefiner(posVector, uvVector);
} else {
return readTopologyRefiner(objFileName, schemeType,
posVector, uvVector);
}
}
} // end namespace
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