assimp.assimp/test/unit/ModelDiffer.cpp

/*
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Open Asset Import Library (assimp)
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*/
#include "ModelDiffer.h"
#include <assimp/scene.h>
#include <sstream>

using namespace Assimp;

ModelDiffer::ModelDiffer() {
    // empty
}

ModelDiffer::~ModelDiffer() {
    // empty
}

bool ModelDiffer::isEqual( aiScene *expected, aiScene *toCompare ) {
    if ( expected == toCompare ) {
        return true;
    }

    if ( nullptr == expected ) {
        return false;
    }

    if ( nullptr == toCompare ) {
        return false;
    }

    if ( expected->mNumMeshes != toCompare->mNumMeshes ) {
        std::stringstream stream;
        stream << "Number of meshes not equal ( expected: " << expected->mNumMeshes << ", found : " << toCompare->mNumMeshes << " )\n";
        addDiff( stream.str() );
    }

    for ( unsigned int i = 0; i < expected->mNumMeshes; i++ ) {
        aiMesh *expMesh( expected->mMeshes[ i ] );
        aiMesh *toCompMesh( toCompare->mMeshes[ i ] );
        compareMesh( expMesh, toCompMesh );
    }
}

void ModelDiffer::showReport() {
    if ( m_diffs.empty() ) {
        return;
    }
    
    for ( std::vector<std::string>::iterator it = m_diffs.begin(); it != m_diffs.end(); it++ ) {
        std::cout << *it << "\n";
    }

    std::cout << std::endl;
}

void ModelDiffer::reset() {
    m_diffs.resize( 0 );
}

void ModelDiffer::addDiff( const std::string &diff ) {
    if ( diff.empty() ) {
        return;
    }
    m_diffs.push_back( diff );
}

static std::string dumpVector3( const aiVector3D &toDump ) {
    std::stringstream stream;
    stream << "( " << toDump.x << ", " << toDump.y << ", " << toDump.z << ")";
    return stream.str();
}

static std::string dumpColor4D( const aiColor4D &toDump ) {
    std::stringstream stream;
    stream << "( " << toDump.r << ", " << toDump.g << ", " << toDump.b << ", " << toDump.a << ")";
    return stream.str();
}

bool ModelDiffer::compareMesh( aiMesh *expected, aiMesh *toCompare ) {
    if ( expected == toCompare ) {
        return true;
    }

    if ( nullptr == expected || nullptr == toCompare ) {
        return false;
    }

    if ( expected->mName != toCompare->mName ) {
        std::stringstream stream;
        stream << "Mesh name not equal ( expected: " << expected->mName.C_Str() << ", found : " << toCompare->mName.C_Str() << " )\n";
        addDiff( stream.str() );
    }

    if ( expected->mNumVertices != toCompare->mNumVertices ) {
        std::stringstream stream;
        stream << "Number of vertices not equal ( expected: " << expected->mNumVertices << ", found : " << toCompare->mNumVertices << " )\n";
        addDiff( stream.str() );
        return false;
    }

    // positions
    if ( expected->HasPositions() != toCompare->HasPositions() ) {
        addDiff( "Expected are vertices, toCompare does not have any." );
        return false;
    }

    bool vertEqual( true );
    for ( unsigned int i = 0; i < expected->mNumVertices; i++ ) {
        aiVector3D &expVert( expected->mVertices[ i ] );
        aiVector3D &toCompVert( toCompare->mVertices[ i ] );
        if ( expVert != toCompVert ) {
            std::stringstream stream;
            stream << "Vertex not equal ( expected: " << dumpVector3( expVert ) << ", found: " << dumpVector3( toCompVert ) << "\n";
            addDiff( stream.str() );
            vertEqual = false;
        }
    }
    if ( !vertEqual ) {
        return false;
    }

    // normals
    if ( expected->HasNormals() != toCompare->HasNormals() ) {
        addDiff( "Expected are normals, toCompare does not have any." );
        return false;
    }

    bool normalEqual( true );
    for ( unsigned int i = 0; i < expected->mNumVertices; i++ ) {
        aiVector3D &expNormal( expected->mNormals[ i ] );
        aiVector3D &toCompNormal( toCompare->mNormals[ i ] );
        if ( expNormal != toCompNormal ) {
            std::stringstream stream;
            stream << "Normal not equal ( expected: " << dumpVector3( expNormal ) << ", found: " << dumpVector3( toCompNormal ) << "\n";
            addDiff( stream.str() );
            normalEqual = false;
        }
    }
    if ( !normalEqual ) {
        return false;
    }

    // vertex colors
    bool vertColEqual( true );
    for ( unsigned int a = 0; a < AI_MAX_NUMBER_OF_COLOR_SETS; a++ ) {
        if ( expected->HasVertexColors(a) != toCompare->HasVertexColors(a) ) {
            addDiff( "Expected are normals, toCompare does not have any." );
            return false;
        }
        for ( unsigned int i = 0; i < expected->mNumVertices; i++ ) {
            aiColor4D &expColor4D( expected->mColors[ a ][ i ] );
            aiColor4D &toCompColor4D( toCompare->mColors[ a ][ i ] );
            if ( expColor4D != toCompColor4D ) {
                std::stringstream stream;
                stream << "Color4D not equal ( expected: " << dumpColor4D( expColor4D ) << ", found: " << dumpColor4D( toCompColor4D ) << "\n";
                addDiff( stream.str() );
                vertColEqual = false;
            }
        }
        if ( !vertColEqual ) {
            return false;
        }
    }

    // texture coords
    bool texCoordsEqual( true );
    for ( unsigned int a = 0; a < AI_MAX_NUMBER_OF_TEXTURECOORDS; a++ ) {
        if ( expected->HasTextureCoords( a ) != toCompare->HasTextureCoords( a ) ) {
            addDiff( "Expected are texture coords, toCompare does not have any." );
            return false;
        }
        for ( unsigned int i = 0; i < expected->mNumVertices; i++ ) {
            aiVector3D &expTexCoord( expected->mTextureCoords[ a ][ i ] );
            aiVector3D &toCompTexCoord( toCompare->mTextureCoords[ a ][ i ] );
            if ( expTexCoord != toCompTexCoord ) {
                std::stringstream stream;
                stream << "Texture coords not equal ( expected: " << dumpVector3( expTexCoord ) << ", found: " << dumpVector3( toCompTexCoord ) << "\n";
                addDiff( stream.str() );
                vertColEqual = false;
            }
        }
        if ( !vertColEqual ) {
            return false;
        }
    }

    // tangents and bi-tangents
    if ( expected->HasTangentsAndBitangents() != toCompare->HasTangentsAndBitangents() ) {
        addDiff( "Expected are tangents and bi-tangents, toCompare does not have any." );
        return false;
    }
    bool tangentsEqual( true );
    for ( unsigned int i = 0; i < expected->mNumVertices; i++ ) {
        aiVector3D &expTangents( expected->mTangents[ i ] );
        aiVector3D &toCompTangents( toCompare->mTangents[ i ] );
        if ( expTangents != toCompTangents ) {
            std::stringstream stream;
            stream << "Tangents not equal ( expected: " << dumpVector3( expTangents ) << ", found: " << dumpVector3( toCompTangents ) << "\n";
            addDiff( stream.str() );
            tangentsEqual = false;
        }

        aiVector3D &expBiTangents( expected->mBitangents[ i ] );
        aiVector3D &toCompBiTangents( toCompare->mBitangents[ i ] );
        if ( expBiTangents != toCompBiTangents ) {
            std::stringstream stream;
            stream << "Tangents not equal ( expected: " << dumpVector3( expBiTangents ) << ", found: " << dumpVector3( toCompBiTangents ) << "\n";
            addDiff( stream.str() );
            tangentsEqual = false;
        }
    }
    if ( !tangentsEqual ) {
        return false;
    }

    return true;
}