/// <summary>
/// 根据给定的一系列有顺序的坐标，逆时针生成轴线左侧的缓冲区边界点
/// </summary>
/// <param name="coords">一系列有顺序的坐标</param>
/// <param name="radius">缓冲区半径</param>
/// <returns>缓冲区的边界坐标</returns>
public VertexCollection GetLeftBufferEdgeCoords(VertexCollection coords, double radius)
{
VertexCollection polyline = new VertexCollection();
Vertex point = new Vertex();
//计算时所需变量
double alpha = 0.0; //向量绕起始点沿顺时针方向旋转到X轴正半轴所扫过的角度
double delta = 0.0; //前后线段所形成的向量之间的夹角
double l = 0.0; //前后线段所形成的向量的叉积
//辅助变量
double startRadian = 0.0;
double endRadian = 0.0;
double beta = 0.0;
double x = 0.0, y = 0.0;
//中间节点
for (int i = 1; i < coords.Count - 1; i++)
{
alpha = GetQuadrantAngle(coords.getVer(i), coords.getVer(i + 1));
delta = GetIncludedAngle(coords.getVer(i - 1), coords.getVer(i), coords.getVer(i + 1));
l = GetVectorProduct(coords.getVer(i - 1), coords.getVer(i), coords.getVer(i + 1));
if (l > 0)//凸
{
startRadian = alpha + (3 * Math.PI) / 2 - delta;
endRadian = alpha + (3 * Math.PI) / 2;
VertexCollection ipc1 = GetBufferCoordsByRadian(coords.getVer(i), startRadian, endRadian, radius);
for (int j = 0; j < ipc1.Count; j++)
{
if (ipc1.getVer(j).X() > 0)
{
}
Alter(ref polyline, ipc1.getVer(j));
polyline.addVer(ipc1.getVer(j));
}
}
else if (l < 0)
{
beta = alpha - (Math.PI - delta) / 2;
x = Math.Round(coords.getVer(i).X() + radius * Math.Cos(beta), 2);
y = Math.Round(coords.getVer(i).Y() + radius * Math.Sin(beta), 2);
Vertex ipoint = new Vertex();
ipoint.X(x);
ipoint.Y(y);
if (ipoint.X() > 0)
{
}
Alter(ref polyline, ipoint);
polyline.addVer(ipoint);
}
}
return(polyline);
}
/// <summary>
/// 判断新加入的点会不会是边界产生自相交，是则进行修改
/// </summary>
/// <param name="ipc"></param>
/// <param name="point"></param>
/// <returns></returns>
public bool Alter(ref VertexCollection ipc, Vertex point)
{
int count = ipc.Count;
if (count >= 3)
{
bool flag = false;
int index = count - 1;
for (int i = index - 1; i >= 1; i--)
{
if (InsectionJudge(ipc.getVer(index), point, ipc.getVer(i), ipc.getVer(i - 1)))
{
flag = true;
index = i;
break;
}
}
if (flag)
{
Vertex insectp = Inter(ipc.getVer(count - 1), point, ipc.getVer(index), ipc.getVer(index - 1));
ipc.removeVers(index, count - index);
ipc.addVer(insectp);
}
}
return(true);
}
/// <summary>
/// 执行线要素的反转
/// </summary>
/// <param name="ipc"></param>
/// <returns></returns>
public VertexCollection Reverse(VertexCollection ipc)
{
VertexCollection ipc0 = new VertexCollection();
for (int i = ipc.Count - 1; i >= 0; i--)
{
ipc0.addVer(ipc.getVer(i));
}
return(ipc0);
}
/// <summary>
/// 生成穹窿模型侧面
/// </summary>
/// <param name="fornix"></param>
/// <param name="preFornix"></param>
private static void createSide(Fornix fornix, Fornix preFornix, double FornixDip)
{
VertexCollection vcDown = new VertexCollection();//底面顶点集合
Vertex vertexUp, vertexDown;
double dip = FornixDip;
//根据产状生成底面顶点
for (int i = 1; i < fornix.outSide.countUpVers() - 1; ++i)
{
vertexUp = fornix.outSide.getUpver(i);
vertexUp.calOccuurence(fornix.outSide.getUpver(i - 1), fornix.outSide.getUpver(i + 1), dip);
vertexDown = new Vertex();
vertexDown.createDownVer(vertexUp);
vertexDown.ID = _verNum++;
vcDown.addVer(vertexDown);
}
vertexUp = fornix.outSide.getUpver(fornix.outSide.countUpVers() - 1);
vertexUp.calOccuurence(fornix.outSide.getUpver(fornix.outSide.countUpVers() - 2), fornix.outSide.getUpver(0), dip);
vertexDown = new Vertex();
vertexDown.createDownVer(vertexUp);
vertexDown.ID = _verNum++;
vcDown.addVer(vertexDown);
vertexUp = fornix.outSide.getUpver(0);
vertexUp.calOccuurence(fornix.outSide.getUpver(fornix.outSide.countUpVers() - 1), fornix.outSide.getUpver(1), dip);
vertexDown = new Vertex();
vertexDown.createDownVer(vertexUp);
vertexDown.ID = _verNum++;
vcDown.addVer(vertexDown);
//生成地层外侧面
fornix.createOutSideLowvers(vcDown);
_verNum -= fornix.createOutSide();
//生成前一地层的内侧面
if (preFornix != null)
{
preFornix.createInSide(fornix);
}
}
/// <summary>
/// 获取指定弧度范围之间的缓冲区圆弧拟合边界点
/// </summary>
/// <param name="center">指定拟合圆弧的原点</param>
/// <param name="startRadian">开始弧度</param>
/// <param name="endRadian">结束弧度</param>
/// <param name="radius">缓冲区半径</param>
/// <returns>缓冲区的边界坐标</returns>
private VertexCollection GetBufferCoordsByRadian(Vertex center, double startRadian, double endRadian, double radius)
{
VertexCollection points = new VertexCollection();
double gamma = Math.PI / 100;
double x = 0.0, y = 0.0;
for (double phi = startRadian; phi <= endRadian + 0.000000000000001; phi += gamma)
{
Vertex point = new Vertex();
x = Math.Round(center.X() + radius * Math.Cos(phi), 2);
y = Math.Round(center.Y() + radius * Math.Sin(phi), 2);
point.X(x);
point.Y(y);
points.addVer(point);
}
return(points);
}
/// <summary>
/// 由多边形顶点生成三角网
/// </summary>
/// <param name="tris"></param>
/// <param name="vc"></param>
/// <param name="rectangle"></param>
/// <param name="cavity"></param>
/// <param name="edges"></param>
private static VertexCollection insertVC2Tris(ref SortedList <string, Triangle> tris, VertexCollection vc, Vertex[] rectangle, SortedList <string, Triangle> cavity, List <Edge> edges)
{
if (null == vc)
{
return(null);
}
Triangle tri;
int i = 0, j;
VertexCollection vcInner = new VertexCollection();
if (0 == tris.Count)
{
//第一个点连接矩形顶点
Vertex ver0 = vc.getVer(0);
Triangle[] triOfRectangle = new Triangle[4];
triOfRectangle[0] = new Triangle();
triOfRectangle[1] = new Triangle();
triOfRectangle[2] = new Triangle();
triOfRectangle[3] = new Triangle();
triOfRectangle[0].addPoint(ver0);
triOfRectangle[0].addPoint(rectangle[1]);
triOfRectangle[0].addPoint(rectangle[0]);
tris.Add(triOfRectangle[0].name, triOfRectangle[0]);
triOfRectangle[1].addPoint(ver0);
triOfRectangle[1].addPoint(rectangle[3]);
triOfRectangle[1].addPoint(rectangle[1]);
tris.Add(triOfRectangle[1].name, triOfRectangle[1]);
triOfRectangle[2].addPoint(ver0);
triOfRectangle[2].addPoint(rectangle[2]);
triOfRectangle[2].addPoint(rectangle[3]);
tris.Add(triOfRectangle[2].name, triOfRectangle[2]);
triOfRectangle[3].addPoint(ver0);
triOfRectangle[3].addPoint(rectangle[0]);
triOfRectangle[3].addPoint(rectangle[2]);
tris.Add(triOfRectangle[3].name, triOfRectangle[3]);
++i;
}
//将地层顶点插入三角网中
for (; i < vc.Count; ++i)
{
Vertex verInserted = vc.getVer(i);
if (!verInserted.innerPoint)
{
for (j = 0; j < tris.Count; ++j)
{
tri = tris.Values[j];
Vertex circumcenter = tri.calCircumCenter();
//点在三角形外接圆中
if (verInserted.calDistance(circumcenter) <= tri.points.getVer(0).calDistance(circumcenter))
{
//广度遍历得到空腔
findCavity(verInserted, tri, tris, cavity, edges);
//由空腔生成新三角形
createTriByCavity(verInserted, ref tris, cavity, edges);
break;
}
}
}
else
{
for (j = 0; j < tris.Count; ++j)
{
tri = tris.Values[j];
//判断点在三角形中
if (verInserted.inside(tri))
{
verInserted.ID = ++idxInnerPoint;
vcInner.addVer(verInserted);
//广度遍历得到空腔
findCavity(verInserted, tri, tris, cavity, edges);
//由空腔生成新三角形
createTriByCavity(verInserted, ref tris, cavity, edges);
break;
}
}
}
}
//插入内部点后调整三角面法向
if (0 != vc.Count && vc.getVer(0).innerPoint)
{
for (i = 0; i < tris.Count; ++i)
{
tri = tris.Values[i];
if (tri.calVector() < 0.0)
{
tri.reverse();
}
}
}
return(vcInner);
}
/// <summary>
/// 由带值点要素生成穹窿模型
/// </summary>
private static void createFornixModelByPoint()
{
string path = @"E:\Users\LiuXianyu\Documents\ExperimentData\myProject\FornixModelingGDAL\Data\LingYanShan\Export\fornix1.obj";
string imgpath = @"E:\Users\LiuXianyu\Documents\ExperimentData\myProject\FornixModelingGDAL\Data\LingYanShan\lingyan.img";
_RasterPoints = DEMServer.getVersFromDEM(imgpath);
//_RasterPoints = new VertexCollection();
//Vertex tempVer = new Vertex();
//tempVer.X(139741.0);
//tempVer.Y(175806.0);
//tempVer.Z(300.0);
//tempVer.innerPoint = true;
//_RasterPoints.addVer(tempVer);
Fornix preFornix = null;
ReadShp(@"E:\Users\LiuXianyu\Documents\ExperimentData\myProject\FornixModelingGDAL\Data\LingYanShan\codedata\vertex1\lyspv1.shp");
ReadShp(@"E:\Users\LiuXianyu\Documents\ExperimentData\myProject\FornixModelingGDAL\Data\LingYanShan\codedata\vertex1\lyspv2.shp");
ReadShp(@"E:\Users\LiuXianyu\Documents\ExperimentData\myProject\FornixModelingGDAL\Data\LingYanShan\codedata\vertex1\lyspv3.shp");
foreach (Layer PointLayer in layers)
{
//读入一个地层
Fornix fornix = new Fornix(PointLayer.GetName());
VertexCollection vcUp = new VertexCollection();
fornix.dip = PointLayer.GetFeature(0).GetFieldAsDouble("dip");
for (int i = 0; i < (int)PointLayer.GetFeatureCount(0); ++i)
{
Vertex vertex = new Vertex();
vertex.ID = _verNum++;
vertex.X(PointLayer.GetFeature(i).GetFieldAsDouble("POINT_X"));
vertex.Y(PointLayer.GetFeature(i).GetFieldAsDouble("POINT_Y"));
//vertex.Z(PointLayer.GetFeature(i).GetFieldAsDouble("RASTERVALU"));
vertex.Z(DEMServer.GetElevation(vertex.X(), vertex.Y()));
vcUp.addVer(vertex);
}
if (vcUp.Count < 3)
{
MessageBox.Show("地层产状点不足！");
}
//生成侧面上顶点
fornix.createOutSideUpvers(vcUp);
//侧面生成
createSide(fornix, preFornix, fornix.dip);
//将顶面边界点产状信息插回shp中
//SetShp(PointLayer, fornix);
//组合
_fornixs.Add(fornix);
preFornix = fornix;
}
foreach (Fornix fornix in _fornixs)
{
//基于相邻顶边，生成顶面
fornix.createUpFace(_RasterPoints);
//基于相邻底边，生成底面
fornix.createDownFace();
}
//打印obj
ObjWriter.writeFornixObj(_fornixs, path, _verNum);
}
public static VertexCollection getVersFromDEM(string imgpath)
{
VertexCollection vc = new VertexCollection();
//栅格范围：left，top，right，bottom
//double dProjX = 138542.596197;
//double dProjY = 177431.143484;
//double dProjX1 = 141246.33321;
//double dProjY1 = 173721.13817;
_ds = Gdal.Open(imgpath, Access.GA_ReadOnly);
srcWidth = _ds.RasterXSize;
srcHeight = _ds.RasterYSize;
int bandCount = _ds.RasterCount;
int[] bandArray = new int[bandCount];
for (int i = 0; i < bandCount; i++)
{
bandArray[i] = i + 1;
}
double[] dataArray = new double[srcWidth * srcHeight * bandCount];
double[] dataArray1 = new double[srcWidth * srcHeight * bandCount];
double x, y;
_ds.ReadRaster(0, 0, srcWidth, srcHeight, dataArray, srcWidth, srcHeight, bandCount, bandArray, 0, 0, 0);
RasterWriter.writeFornixObj(dataArray, srcWidth, srcHeight, @"E:\Users\LiuXianyu\Documents\ExperimentData\myProject\FornixModelingGDAL\Data\LingYanShan\Export\Raster.txt");
//获取坐标变换系数
//0左上角x坐标
//1东西方向分辨率
//2旋转角度, 0表示图像 "北方朝上"
//3左上角y坐标
//4旋转角度, 0表示图像 "北方朝上"
//5南北方向分辨率
_ds.GetGeoTransform(_adfGeoTransform);
Band band = _ds.GetRasterBand(1);
band.ComputeRasterMinMax(lim, 0);
//VIP法筛选DEM点
//getInnerPointsByVIP(dataArray, dataArray1);
//固定步长法筛选DEM点
getInnerPointsByStep(dataArray, dataArray1);
//根据矩阵数据生成点集
for (int i = 0; i < srcWidth; ++i)
{
for (int j = 0; j < srcHeight; ++j)
{
if (-1.0 != dataArray1[i * srcWidth + j])
{
Vertex ver = new Vertex();
getCoordinateFromMatrix(dataArray1, i, j, out x, out y);
ver.X(x);
ver.Y(y);
//ver.Z(dataArray1[i * srcWidth + j]);
ver.Z(GetElevation(x, y));
ver.innerPoint = true;
vc.addVer(ver);
}
}
}
return(vc);
}
/// <summary>
/// 通过检查侧边底边线段有无相交（形成意外圈），来消除相交三角面，转而用其最外交点为顶点，生成新的三角面代替
/// </summary>
private int removeInsectedFace()
{
int removeLowVersNum = 0; //移去侧面底边顶点个数
int i, j, k = 0, idxEdge; //当前线段与其后第idxEdge个线段最后相交
Triangle insertedTri;
Edge curEdge, testEdge, crossEdge = null;
Vertex insertedVer;
VertexCollection vcDown1 = new VertexCollection();
for (i = 0; i < this.outSide.edges.Count; ++i)
{
curEdge = this.outSide.edges[i];
idxEdge = 0;
for (j = i + 2; (i > 0 && j < this.outSide.edges.Count) || (i == 0 && j < this.outSide.edges.Count - 1); ++j)//一个线段的下两个线段才可能与其“相交”，所以从i+2开始
{
testEdge = this.outSide.edges[j];
if (curEdge.InsectionJudge(testEdge))
{
crossEdge = testEdge;
idxEdge = j - i;
}
}
if (0 == idxEdge)
{
continue;
}
if (idxEdge > this.outSide.edges.Count / 2)
{
MessageBox.Show("底边起始点可能处于‘意外圈’中！");//TODO:这种情况还没解决
}
removeLowVersNum += (idxEdge - 1);
//两个线段交点
insertedVer = curEdge.getCrossPoint(crossEdge);
//删除意外圈原有三角面，并插入意外圈所有新上三角面
for (j = i; j <= i + idxEdge; ++j)
{
this.outSide.tris.Remove(this.outSide.edges[j].adjTriName[0]);
this.outSide.tris.Remove(this.outSide.edges[j].adjTriName[1]);
insertedTri = new Triangle();
insertedTri.addPoint(this.outSide.upvers.getVer(j));
insertedTri.addPoint(this.outSide.upvers.getVer((j + 1 == this.outSide.edges.Count) ? 0 : j + 1));
insertedTri.addPoint(insertedVer);
this.outSide.tris.Add(insertedTri.name, insertedTri);
}
//插入“意外圈”前端新下三角面
insertedTri = new Triangle();
insertedTri.addPoint(this.outSide.upvers.getVer(i));
insertedTri.addPoint(insertedVer);
insertedTri.addPoint(this.outSide.lowvers.getVer(i));
this.outSide.tris.Add(insertedTri.name, insertedTri);
//插入“意外圈”后端新下三角面
insertedTri = new Triangle();
insertedTri.addPoint(this.outSide.upvers.getVer((i + idxEdge + 1 == this.outSide.edges.Count) ? 0 : i + idxEdge + 1));
insertedTri.addPoint(this.outSide.lowvers.getVer((i + idxEdge + 1 == this.outSide.edges.Count) ? 0 : i + idxEdge + 1));
insertedTri.addPoint(insertedVer);
this.outSide.tris.Add(insertedTri.name, insertedTri);
//当前顶点后的所有顶点ID前移
for (; j < this.outSide.lowvers.Count; ++j)
{
this.outSide.lowvers.getVer(j).ID -= (idxEdge - 1);
}
//往新底面顶点集合中插入已确定的顶点
for (j = k; j <= i; ++j)
{
vcDown1.addVer(this.outSide.lowvers.getVer(j));
}
vcDown1.addVer(insertedVer);
k = i + idxEdge + 1;
//向后推进到与当前侧面底边线段无交点的第一个线段
i += idxEdge;
}
//插入剩余的顶点
for (j = k; j < i; ++j)
{
vcDown1.addVer(this.outSide.lowvers.getVer(j));
}
this.outSide.lowvers.clear();
this.outSide.lowvers.addVerCollection(vcDown1);
return(removeLowVersNum);
}