OpenSubdiv/examples/projectTest/main.cpp

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#if defined( _WIN32)
#include <windows.h>
#endif

#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/uniformEvaluator.h>
#include <osdutil/topology.h>

#include "../common/stopwatch.h"
#include "../../regression/common/shape_utils.h"


#include <cfloat>
#include <vector>
#include <fstream>
#include <sstream>
#include <cstdlib>

#ifdef OPENSUBDIV_HAS_OPENMP
    #include <omp.h>
#endif

using namespace OpenSubdiv;

static shape * readShape( char const * fname ) {

    FILE * handle = fopen( fname, "rt" );
    if (not handle) {
        printf("Could not open \"%s\" - aborting.\n", fname);
        exit(0);
    }

    fseek( handle, 0, SEEK_END );
    size_t size = ftell(handle);
    fseek( handle, 0, SEEK_SET );

    char * shapeStr = new char[size+1];

    if ( fread( shapeStr, size, 1, handle)!=1 ) {
        printf("Error reading \"%s\" - aborting.\n", fname);
        exit(0);
    }

    fclose(handle);

    shapeStr[size]='\0';

    return shape::parseShape( shapeStr, 1 );
}

static bool
shapeToTopology( const shape *input, PxOsdUtilSubdivTopology *output,
                 std::string *errorMessage)
{
    int numVertices = input->getNverts();
    
    output->numVertices = numVertices;
    output->maxLevels = 3;  //arbitrary initial value
    output->nverts = input->nvertsPerFace;
    output->indices = input->faceverts;

    // XXX:gelder
    // Need to pull over uvs and tags for better test coverage

    return output->IsValid(errorMessage);
}


//------------------------------------------------------------------------------
static bool
createOsdMesh(char *inputFile, char *outputFile, std::string *errorMessage)
{

    shape *inputShape = readShape(inputFile);
    
    PxOsdUtilSubdivTopology topology;
    if (not shapeToTopology(inputShape, &topology, errorMessage))
        return false;

    PxOsdUtilUniformEvaluator uniformEvaluator;

    // Create uniformEvaluator
    if (not uniformEvaluator.Initialize(topology, errorMessage)) {
        return false;
    }

    // Push the vertex data
    uniformEvaluator.SetCoarsePositions(inputShape->verts, errorMessage);

    // Refine with eight threads
    if (not uniformEvaluator.Refine(8, errorMessage))
        return false;
    
    std::vector<int> refinedQuads;
    if (not uniformEvaluator.GetRefinedQuads(&refinedQuads, errorMessage)) {
        std::cout  << "GetRefinedQuads failed with " << errorMessage << std::endl;        
    }

    float *refinedPositions = NULL;
    int numFloats = 0;
    if (not uniformEvaluator.GetRefinedPositions(&refinedPositions, &numFloats, errorMessage)) {
        std::cout  << "GetRefinedPositions 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";
    }
        
    std::cout << "Hot damn, it worked.\n";
    std::cout << "Positions = " << numFloats/3 << std::endl;
    for (int i=0; i<numFloats; i+=3)  {
        std::cout << "(" << refinedPositions[i] <<
            ", " << refinedPositions[i+1] <<
            "," << refinedPositions[i+2] << ")\n";
    }



//    if (not uniformEvaluator.WriteRefinedObj("foo.obj", errorMessage)) {
//        std::cout << errorMessage << std::endl;             
//    }


    return true;
}

//------------------------------------------------------------------------------
static void
callbackError(OpenSubdiv::OsdErrorType err, const char *message)
{
    printf("OsdError: %d\n", err);
    printf("%s", message);
}


//------------------------------------------------------------------------------
int main(int argc, char** argv) {


    if (argc < 3) {
        std::cout << "Usage: projectTest input.obj output\n";
        return false;
    }

    std::cout << "input is " << argv[1] << " and output is " << argv[2] <<std::endl;


    OsdSetErrorCallback(callbackError);

    std::string errorMessage;

    if (not createOsdMesh(argv[1], argv[2], &errorMessage)) {
        std::cout << "Failed with error: " << errorMessage << std::endl;
    }

}