Function bendTextAlongCurve

source/MRSymbolMesh/MRAlignTextToMesh.cpp:90–135

}

Expected<Mesh> bendTextAlongCurve( const CurveFunc& curve, const BendTextAlongCurveParams& params )
{
    MR_TIMER;
    if ( !curve.func )
    {
        assert( false );
        return unexpected( "No curve provided" );
    }

    auto contoursOrError = createSymbolContours( params.symbolMesh );
    if ( !contoursOrError.has_value() )
        return unexpected( std::move( contoursOrError.error() ) );

    auto& conts = *contoursOrError;

    auto bbox = findContoursBBox( conts );
    if ( !bbox.valid() )
        return unexpected( "Symbols mesh is empty" );

    int numLines = 1;
    for ( auto c : params.symbolMesh.text )
        if ( c == '\n' )
            ++numLines;

    auto diagonal = bbox.size();

    const float symbolDependentMultiplier = params.fontBasedSizeCalc ? diagonal.y / params.symbolMesh.MaxGeneratedFontHeight / numLines : 1.0f;
    auto scale = symbolDependentMultiplier * ( params.fontHeight * numLines * ( 1.0f + params.symbolMesh.symbolsDistanceAdditionalOffset.y ) ) / diagonal.y;
    scaleContours( conts, scale );

    Vector2f relPivot = params.pivotBoxPoint;
    if ( params.fontBasedSizeCalc )
    {
        float absYPivot =
            ( 1 - numLines ) * params.symbolMesh.MaxGeneratedFontHeight * ( 1 - params.pivotBoxPoint.y ) + params.symbolMesh.MaxGeneratedFontHeight * params.pivotBoxPoint.y;
        relPivot.y = ( absYPivot - bbox.min.y ) / diagonal.y;
    }

    return bendContoursAlongCurve( conts, curve, {
        .pivotCurveTime = params.pivotCurveTime,
        .pivotBoxPoint = relPivot,
        .periodicCurve = params.periodicCurve,
        .stretch = params.stretch,
        .extrusion = params.surfaceOffset
        } );
}

Expected<Mesh> bendTextAlongCurve( const CurvePoints& cp, const BendTextAlongCurveParams& params )
{