private void Form1_MouseClick(object sender, MouseEventArgs e)
{
if (layer == null)
{
return;
}
GISVertex v = view.ToMapVertex(e.Location);
Console.WriteLine("mapvertex @" + v.x.ToString() + "|" + v.y.ToString()); //此处鼠标点到地图点的转换???
//创建点选粗选矩形
GISSelect s = new GISSelect();
GISExtent MinSelectExtent = s.BuildExtent(v, view);
Point bottomleft = view.ToScreenPoint(MinSelectExtent.bottomleft);
Point upleft = view.ToScreenPoint(new GISVertex(MinSelectExtent.bottomleft.x, MinSelectExtent.upright.y));
Point upright = view.ToScreenPoint(MinSelectExtent.upright);
Point bottomright = view.ToScreenPoint(new GISVertex(MinSelectExtent.upright.x, MinSelectExtent.bottomleft.y));
Point[] points = new Point[] { bottomleft, upleft, upright, bottomright };
Graphics graphics = this.CreateGraphics();
graphics.DrawPolygon(new Pen(GISConst.PolygonBoundaryColor, GISConst.PolygonBoundaryWidth), points);
SelectResult sr = layer.Select(v, view);
if (sr == SelectResult.OK)
{
UpdateMap();
//toolStripStatusLabel1.Text = layer.Selection.Count.ToString();
toolStripStatusLabel2.Text = "click @" + v.x.ToString() + "|" + v.y.ToString();
UpdateAttributeWindow();
//statusStrip1.Text = layer.Selection.Count.ToString();
}
}
private void Form1_MouseClick(object sender, MouseEventArgs e)
{
GISVertex mouselocation = view.ToMapVertex(new Point(e.X, e.Y));
double mindistance = Double.MaxValue;
int id = -1;
for (int i = 0; i < features.Count; i++)
{
double onedistance = features[i].getSpatial().getCentroid().Distance(mouselocation);
if (onedistance < mindistance)
{
id = i;
mindistance = onedistance;
}
}
if (id == -1)
{
MessageBox.Show("points is an empty set!");
return;
}
int screendistance = view.ToScreenPoint(new GISVertex(mindistance, 0)).X -
view.ToScreenPoint(new GISVertex(0, 0)).X;
if (screendistance > 5)
{
MessageBox.Show("please click one point closely!");
return;
}
MessageBox.Show("attribute is " + features[id].getAttributeValue(0));
}
private void Form1_MouseClick(object sender, MouseEventArgs e)
{//点击空间对象显示属性信息
//根据鼠标的点击创建节点信息
if (features.Count == 0)
{
return;
}
GISVertex mouselocation = view.ToMapVertex(e.Location);
double mindistance = Double.MaxValue;
int id = -1;
//通过遍历找出features数组中元素的中心点与点击位置最近的点
for (int i = 0; i < features.Count; i++)
{
double onedistance = features[i].spatialpart.centroid.Distance(mouselocation);
if (onedistance < mindistance)
{
mindistance = onedistance;
id = i;
}
}
//判断是否存在空间对象
if (id == -1)
{
MessageBox.Show("没有任何空间对象！！");
return;//结束了
}
Point nearestpoint = view.ToScreenPoint(features[id].spatialpart.centroid);
if (ScreenDistance(e.Location, nearestpoint) < 5)
{
MessageBox.Show(features[id].getAttribute(0).ToString());
}
}
public void delaunay()
{
GISVertex v;
updateview();
pt.Clear();
dlay.Clear();
for (i = 0; i < document.layers.Count; i++)
{
if (document.layers[i].ShapeType == SHAPETYPE.POINT)
{
for (j = 0; j < document.layers[i].Features.Count; j++)
{
v = new GISVertex(view.ToScreenPoint(document.layers[i].Features[j].spatialpart.centroid).X, view.ToScreenPoint(document.layers[i].Features[j].spatialpart.centroid).Y);
pt.Add(new PointF(Convert.ToSingle(v.x), Convert.ToSingle(v.y)));
}
ptA[0].X = this.Width / 2;
ptA[0].Y = -Convert.ToSingle(ptA[0].X / Math.Sqrt(3) * 2);
ptA[1].X = -ptA[0].X;
ptA[1].Y = this.Height;
ptA[2].X = this.Width + ptA[0].X;
ptA[2].Y = this.Height - 10;
dlay.Add(new Delaunay3(ptA[0], ptA[1], ptA[2]));
for (q = 0; q < pt.Count; q++)
{
de = null;
for (j = 0; j < dlay.Count; j++)
{
if (dlay[j].contain(pt[q]))
{
de = dlay[j];
break;
}
}
if (de != null)
{
dlay.Remove(de);
dlay.Add(new Delaunay3(de.pt[0], de.pt[1], pt[q]));
dlay.Add(new Delaunay3(de.pt[0], de.pt[2], pt[q]));
dlay.Add(new Delaunay3(de.pt[2], de.pt[1], pt[q]));
}
n1 = false;
while (n1 == false)
{
n1 = true;
for (m = 0; m < dlay.Count - 1; m++)
{
for (n = m + 1; n < dlay.Count; n++)
{
if (dlay[m].Ifggb(dlay[n]) && LOP(dlay[m], dlay[n]) == false)
{
de1 = dlay[m];
de2 = dlay[n];
n1 = false;
ggb1 = de1.Findggb(de2);
for (k = 0; k < 3; k++)
{
if (de1.pt[k] != ggb1.StartNode && de1.pt[k] != ggb1.EndNode)
{
p1 = de1.pt[k];
}
if (de2.pt[k] != ggb1.StartNode && de2.pt[k] != ggb1.EndNode)
{
p2 = de2.pt[k];
}
}//交换对角线
dlay.Add(new Delaunay3(ggb1.StartNode, p1, p2));
dlay.Add(new Delaunay3(ggb1.EndNode, p1, p2));
dlay.Remove(de1);
dlay.Remove(de2);
}
if (n1 == false)
{
break;
}
}
if (n1 == false)
{
break;
}
}
}
}
break;
}
}
}
public void delaunay()
{
GISVertex v;
updateview();
pt.Clear();
dlay.Clear();
for (i = 0; i < document.layers.Count; i++)
{
if (document.layers[i].ShapeType == SHAPETYPE.POINT)
{
for (j = 0; j < document.layers[i].Features.Count; j++)
{
v = new GISVertex(view.ToScreenPoint(document.layers[i].Features[j].spatialpart.centroid).X, view.ToScreenPoint(document.layers[i].Features[j].spatialpart.centroid).Y);
pt.Add(new PointF(Convert.ToSingle(v.x), Convert.ToSingle(v.y)));
}
//ptA[0].X = pictureBox1.Width / 2;
//ptA[0].Y = -Convert.ToSingle(ptA[0].X / Math.Sqrt(3) * 2);
//ptA[1].X = -ptA[0].X;
//ptA[1].Y = pictureBox1.Height;
//ptA[2].X = pictureBox1.Width + ptA[0].X;
//ptA[2].Y = pictureBox1.Height - 5;
float xmax, xmin, ymax, ymin, dx, dy, ddx, ddy;
xmin = xmax = pt[0].X;
ymin = ymax = pt[0].Y;
for (j = 1; j < pt.Count; j++)
{
if (xmin > pt[j].X)
{
xmin = pt[j].X;
}
if (xmax < pt[j].X)
{
xmax = pt[j].X;
}
if (ymin > pt[j].Y)
{
ymin = pt[j].Y;
}
if (ymax < pt[j].Y)
{
ymax = pt[j].Y;
}
}
dx = xmax - xmin;
dy = ymax - ymin;
ddx = dx / 100;
ddy = dy / 100;
xmin -= ddx;
xmax += ddx;
dx += 2 * ddx;
ymin -= ddy;
ymax += ddy;
dy += 2 * ddy;
ptA[0].X = xmin - dy * Convert.ToSingle(Math.Sqrt(3) / 3);
ptA[0].Y = ymin;
ptA[1].X = xmax + dy * Convert.ToSingle(Math.Sqrt(3) / 3);
ptA[1].Y = ymin;
ptA[2].X = (xmin + xmax) / 2;
ptA[2].Y = xmax + dy * Convert.ToSingle(Math.Sqrt(3) / 2);
dlay.Add(new Delaunay3(ptA[0], ptA[1], ptA[2]));
for (q = 0; q < pt.Count; q++)
{
de = null;
for (j = 0; j < dlay.Count; j++)
{
if (dlay[j].contain(pt[q]))
{
de = dlay[j];
break;
}
}
if (de != null)
{
dlay.Remove(de);
dlay.Add(new Delaunay3(de.pt[0], de.pt[1], pt[q]));
dlay.Add(new Delaunay3(de.pt[0], de.pt[2], pt[q]));
dlay.Add(new Delaunay3(de.pt[2], de.pt[1], pt[q]));
}
n1 = false;
while (n1 == false)
{
n1 = true;
for (m = 0; m < dlay.Count - 1; m++)
{
for (n = m + 1; n < dlay.Count; n++)
{
if (dlay[m].Ifggb(dlay[n]) && LOP(dlay[m], dlay[n]) == false)
{
de1 = dlay[m];
de2 = dlay[n];
n1 = false;
ggb1 = de1.Findggb(de2);
for (k = 0; k < 3; k++)
{
if (de1.pt[k] != ggb1.StartNode && de1.pt[k] != ggb1.EndNode)
{
p1 = de1.pt[k];
}
if (de2.pt[k] != ggb1.StartNode && de2.pt[k] != ggb1.EndNode)
{
p2 = de2.pt[k];
}
}//交换对角线
dlay.Add(new Delaunay3(ggb1.StartNode, p1, p2));
dlay.Add(new Delaunay3(ggb1.EndNode, p1, p2));
dlay.Remove(de1);
dlay.Remove(de2);
}
if (n1 == false)
{
break;
}
}
if (n1 == false)
{
break;
}
}
}
}
}
if (document.layers[i].ShapeType == SHAPETYPE.POINT)
{
break;
}
}
}