[原][osgearth]earth文件加载道路一初步看见模型道路

时间是2017年2月5日17:16:32

由于OE2.9还没有发布，但是我又急于使用OE的道路。

所以，我先编译了正在github上调试中的OE2.9

github网址是：https://github.com/gwaldron/osgearth

但是由于，它是调试中的版本，很多例子还不能跑。

不过，经过一番摸索，我还是调通了一个使用model建立道路的earth

<map>

    <options>

    <!--添加缓存机制-->

        <cache path="../cache" type="filesystem" />

        <terrain driver="rex">

            <lods>

                <lod lod="13" priority_offset="7"/>

                <lod lod="16" priority_offset="3"/>

            </lods>

        </terrain>

    </options>

    <image name="readymap_imagery" driver="tms" opacity="0.9" enabled="true">

        <url>http://readymap.org/readymap/tiles/1.0.0/7/</url>

    </image>

    <elevation name="readymap_elevation" driver="tms" enabled="true">

        <url>http://readymap.org/readymap/tiles/1.0.0/116/</url>

    </elevation>  

    <!--测试地图-->

    <image driver="debug"/>     

    <!--平整路-->

    <flattened_elevation name="road flattener" min_level="12" max_level="16">

        <cache_policy usage="none"/>

        <base_layer>readymap_elevation</base_layer>

        <features name="roads" driver="ogr">

                    <!--url>H:/data/fhwa/nhpn2005_08/NHPNLine-mercator.shp</url-->

            <url>../data/flatten_mt_rainier.shp</url>

            <build_spatial_index>true</build_spatial_index>

        </features>

        <line_width>50m</line_width>

        <buffer_width>50m</buffer_width>

    </flattened_elevation>

    <!--线框模型-->

    <model name="boundaries" driver="feature_geom">

        <features name="world" driver="ogr">

            <url>../data/flatten_mt_rainier.shp</url>

        </features>

        <styles>

            <style type="text/css">

                states {

                   stroke:            #ffff00;

                   render-depth-test: false;

                   render-clip-plane: 0;

                   render-order:      1;

                }

            </style>

        </styles>

    </model>

    <!--贴图路面

    <road_surface min_level="13">

        <cache_policy usage="none"/>

        <features name="roads" driver="ogr">

            <url>../data/flatten_mt_rainier.shp</url>

            <build_spatial_index>true</build_spatial_index>

        </features>

        <style type="text/css">

            default {

               stroke: #ffffff;

               stroke-width: 25m;

               stroke-image: "../data/road.png";

            }

        </style>

        <outer_width>100</outer_width>

    </road_surface>

    -->

    <model name="points" driver="feature_geom">

        <features name="points" driver="ogr">

            <url>../data/flatten_mt_rainier.shp</url>

            <build_spatial_index>true</build_spatial_index>

        </features>

        <styles>

            <style type="text/css">

                points {

                   model:               "../data/red_flag.osg.10.scale";

                   altitude-clamping:   terrain;

                }

            </style>

        </styles>   

    </model>

    <!--路模型<layout tile_size="2000">

            <level class="default" max_range="10000"/>

        </layout>-->

    <model name="roadssss" driver="feature_geom">

        <features name="roadssss" driver="ogr">

            <url>../data/flatten_mt_rainier.shp</url>

            <build_spatial_index>true</build_spatial_index>

        </features>

        <styles>

            <style type="text/css">

                default {

                   stroke: #ff0000;

                   stroke-width: 25m;

                   stroke-tessellation-size: 50m;

                   stroke-image: "../data/road.png";

                   altitude-clamping: terrain;

                   altitude-resolution: 0.0001;

                   altitude-binding: vertex;

                   render-order: 1;

                   render-transparent: true;

                   render-decal: true;

                   altitude-offset: 0.05;

                }

            </style>

        </styles>

    </model>

    <!--线框模型

    <model driver="feature_geom" min_level="13">

    <cache_policy usage="none"/>

    <features name="roads" driver="ogr">

      <url>../data/flatten_mt_rainier.shp</url>

      <build_spatial_index>true</build_spatial_index>

    </features>

    <layout tile_size="2000">

      <level class="default" max_range="10000"/>

    </layout>

    <styles>

      <style type="text/css">

        default {

        stroke: #ffffff;

        stroke-width: 25m;

        stroke-tessellation-size: 50m;

        stroke-image: "../data/road.png";

        altitude-clamping: terrain;

        altitude-resolution: 0.00001;

        altitude-binding: vertex;

        render-order: 1;

        render-transparent: true;

        render-decal: true;

        altitude-offset: 0.05;

        }

      </style>

    </styles>

  </model>

  -->

    <bumpmap>

        <image>../data/rock_hard.jpg</image>

        <octaves>8</octaves>

        <intensity>8.2</intensity>

    </bumpmap>     

    <xi:include href="viewpoints.xml"/>

  <libraries>osgearthsplat</libraries>

</map>

这个例子包含了：

1.压路机，就是把地形给压平了

2.模型线框，我用来标识shp文件所在位置的

3.添加4个小旗子模型，也是用来表示shp中的点的

4.重点就是这“道路”模型，我先解决了有的问题，之后我再把他变成真正可行的道路

PS：我之后会使用road_surface来调试，这个出来就差不多了

巴特西

[原][osgearth]earth文件加载道路一初步看见模型道路

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