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C++ TextSymbol::script方法代码示例

本文整理汇总了C++中TextSymbol::script方法的典型用法代码示例。如果您正苦于以下问题:C++ TextSymbol::script方法的具体用法?C++ TextSymbol::script怎么用?C++ TextSymbol::script使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在TextSymbol的用法示例。


在下文中一共展示了TextSymbol::script方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: createNode

    /**
     * Creates a complete set of positioned label nodes from a feature list.
     */
    osg::Node* createNode(
        const FeatureList&   input,
        const Style&         style,
        FilterContext&       context )
    {
        if ( style.get<TextSymbol>() == 0L && style.get<IconSymbol>() == 0L )
            return 0L;

        // copy the style so we can (potentially) modify the text symbol.
        Style styleCopy = style;
        TextSymbol* text = styleCopy.get<TextSymbol>();
        IconSymbol* icon = styleCopy.get<IconSymbol>();

        osg::Group* group = new osg::Group();
        
        StringExpression  textContentExpr ( text ? *text->content()  : StringExpression() );
        NumericExpression textPriorityExpr( text ? *text->priority() : NumericExpression() );
        NumericExpression textSizeExpr    ( text ? *text->size()     : NumericExpression() );
        StringExpression  iconUrlExpr     ( icon ? *icon->url()      : StringExpression() );
        NumericExpression iconScaleExpr   ( icon ? *icon->scale()    : NumericExpression() );
        NumericExpression iconHeadingExpr ( icon ? *icon->heading()  : NumericExpression() );

        for( FeatureList::const_iterator i = input.begin(); i != input.end(); ++i )
        {
            Feature* feature = i->get();
            if ( !feature )
                continue;
            
            // run a symbol script if present.
            if ( text && text->script().isSet() )
            {
                StringExpression temp( text->script().get() );
                feature->eval( temp, &context );
            }
            
            // run a symbol script if present.
            if ( icon && icon->script().isSet() )
            {
                StringExpression temp( icon->script().get() );
                feature->eval( temp, &context );
            }

            const Geometry* geom = feature->getGeometry();
            if ( !geom )
                continue;

            Style tempStyle = styleCopy;

            // evaluate expressions into literals.
            // TODO: Later we could replace this with a generate "expression evaluator" type
            // that we could pass to PlaceNode in the DB options. -gw

            if ( text )
            {
                if ( text->content().isSet() )
                    tempStyle.get<TextSymbol>()->content()->setLiteral( feature->eval( textContentExpr, &context ) );

                if ( text->size().isSet() )
                    tempStyle.get<TextSymbol>()->size()->setLiteral( feature->eval(textSizeExpr, &context) );
            }

            if ( icon )
            {
                if ( icon->url().isSet() )
                    tempStyle.get<IconSymbol>()->url()->setLiteral( feature->eval(iconUrlExpr, &context) );

                if ( icon->scale().isSet() )
                    tempStyle.get<IconSymbol>()->scale()->setLiteral( feature->eval(iconScaleExpr, &context) );

                if ( icon->heading().isSet() )
                    tempStyle.get<IconSymbol>()->heading()->setLiteral( feature->eval(iconHeadingExpr, &context) );
            }
            
            osg::Node* node = makePlaceNode(
                context,
                feature,
                tempStyle,
                textPriorityExpr);

            if ( node )
            {
                if ( context.featureIndex() )
                {
                    context.featureIndex()->tagNode(node, feature);
                }

                group->addChild( node );
            }
        }

        // Note to self: need to change this to support picking later. -gw
        //VirtualProgram* vp = VirtualProgram::getOrCreate(group->getOrCreateStateSet());
        //vp->setInheritShaders( false );

        return group;
    }
开发者ID:3dcl,项目名称:osgearth,代码行数:99,代码来源:AnnotationLabelSource.cpp


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