/// <summary>
/// 将要素转换成Mesh对象
/// </summary>
private void FeaturesToMesh()
{
//读取shapefile的内容
string path = "";
var rader = new NetTopologySuite.IO.ShapeFile.Extended.ShapeDataReader(path);
var result = rader.ReadByMBRFilter(rader.ShapefileBounds);
//读取其中的点信息，转换成mesh对象
var mesh = new PongGlobe.Core.Mesh <Vector3>();
mesh.PrimitiveType = PrimitiveType.TriangleStrip;
//在转换成
List <Vector3> positions = new List <Vector3>();
//记录其indices
List <ushort> indics = new List <ushort>();
//填充顶点跟索引
//详细流程，如果是投影坐标，将其转换成wgs84的经纬度坐标，再使用参考系计算出其真实的地理坐标
foreach (var item in result)
{
var geo = item.Geometry.Coordinates;
//暂未考虑multipolygon的情况，也即是Hole polygon.
foreach (var coord in geo)
{
//将其转换成弧度制
positions.Add(_shape.ToVector3(new Geodetic3D(MathExtension.ToRadius(coord.X), MathExtension.ToRadius(coord.Y))));
}
}
//简化几何，如去除重复点，重置indices等操作
}
/// <summary>
/// 这里统一使用弧度制作为参数
/// </summary>
/// <param name="shpPath"></param>
/// <param name="scene"></param>
public VectorLayerRender(string shpPath, Scene.Scene scene)
{
var shpReader = new NetTopologySuite.IO.ShapeFile.Extended.ShapeDataReader(shpPath);
var fea = shpReader.ReadByMBRFilter(shpReader.ShapefileBounds);
_features = fea;
//构建索引
foreach (var item in _features)
{
if (item.Geometry is IPolygon)
{
var env = item.Geometry.EnvelopeInternal;
_quadTree.Insert(item.Geometry.EnvelopeInternal, item);
}
else if (item.Geometry is IMultiPolygon)
{
foreach (var child in item.Geometry as IMultiPolygon)
{
_quadTree.Insert(child.EnvelopeInternal, item);
}
}
}
_scene = scene;
//设置其选中的样式
SelectedStyle.PolygonStyle.FillColor = RgbaFloat.Orange;
}
public PointVectorLayerRender(string shpPath, Scene.Scene scene)
{
_scene = scene;
var shpReader = new NetTopologySuite.IO.ShapeFile.Extended.ShapeDataReader(shpPath);
var fea = shpReader.ReadByMBRFilter(shpReader.ShapefileBounds);
_meshPoints = FeatureTrianglator.PointFeatureToPoints(fea, _scene.Ellipsoid);
//这里可以强制释放相关资源了
shpReader.Dispose();
}
