/// <summary>
/// 离散Polygon
/// </summary>
/// <param name="polygon"></param>
/// <param name="distance"></param>
private IPolygon DiscretePolygon(IPolygon polygon, double distance)
{
string wkt = "PROJCS[\"<Custom Coordinate>\",GEOGCS[\"GCS_Beijing_1954\",DATUM[\"D_Beijing_1954\",SPHEROID[\"Krasovsky_1940\",6378245.0,298.3]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Transverse_Mercator\"],PARAMETER[\"false_easting\",64685.26],PARAMETER[\"false_northing\",-3267460.1405],PARAMETER[\"central_meridian\",120.0],PARAMETER[\"scale_factor\",1.0],PARAMETER[\"latitude_of_origin\",0.0],UNIT[\"Meter\",1.0]]";
ICoordinateReferenceSystem tempcrs = crsFactory.CreateFromWKT(wkt);
IRing ring = polygon.ExteriorRing;
IPolygon resPolygon = geoFactory.CreateGeometry(gviGeometryType.gviGeometryPolygon, gviVertexAttribute.gviVertexAttributeZ) as IPolygon;
resPolygon.SpatialCRS = crs as ISpatialCRS;
for (int i = 0; i < ring.PointCount - 1; i++)
{
IPoint point1 = ring.GetPoint(i);
IPoint point2 = ring.GetPoint(i + 1);
resPolygon.ExteriorRing.AppendPoint(point1);
point1.Project(tempcrs as ISpatialCRS);
point2.Project(tempcrs as ISpatialCRS);
IVector3 p1 = point1.Position;
IVector3 p2 = point2.Position;
IEulerAngle angle = this.axRenderControl1.Camera.GetAimingAngles(p1, p2);
p2.MultiplyByScalar(-1);
double length = p1.Add(p2).Length;
for (int j = 0; j < (int)(length / distance); j++)
{
IVector3 tempv3 = this.axRenderControl1.Camera.GetAimingPoint(p1, angle, (distance * (j + 1)));
IPoint tempPoint = geoFactory.CreatePoint(gviVertexAttribute.gviVertexAttributeZ);
tempPoint.Position = tempv3;
tempPoint.SpatialCRS = tempcrs as ISpatialCRS;
tempPoint.Project(crs as ISpatialCRS);
resPolygon.ExteriorRing.AppendPoint(tempPoint);
}
}
resPolygon.Close();
return(resPolygon);
}
/// <summary>
/// 参数化建模
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnDriveModel_Click(object sender, System.EventArgs e)
{
try
{
if (polyline != null)
{
center = polyline.Envelope.Center;
IModelPoint mp = new GeometryFactory().CreateGeometry(gviGeometryType.gviGeometryModelPoint, gviVertexAttribute.gviVertexAttributeZ) as IModelPoint;
mp.SpatialCRS = datasetCRS;
mp.Position = center;
IModel model = new ResourceFactory().CreateModel();
IDrawGroup group = new DrawGroup();
IDrawPrimitive primitive = new DrawPrimitive();
IDrawMaterial material = new DrawMaterial();
material.TextureName = (strMediaPath + @"\shp\road\textrure.jpg");
material.CullMode = gviCullFaceMode.gviCullNone;
material.WrapModeS = gviTextureWrapMode.gviTextureWrapRepeat;
material.WrapModeT = gviTextureWrapMode.gviTextureWrapRepeat;
IFloatArray va = new FloatArray();
IFloatArray ta = new FloatArray();
// 逐点外扩
for (int i = 0; i < polyline.PointCount; i++)
{
#region 单独处理最后一个点
if (i == polyline.PointCount - 1)
{
curPoint = polyline.GetPoint(i);
vecCurPos = curPoint.Position;
// 最后一个点重用最后的方向向量
vecTarget = vecDirect.CrossProduct(vecZ);
vecTarget.Normalize();
vecTarget.MultiplyByScalar(width / 2);
vecP = vecCurPos.Add(vecTarget);
vecTarget.MultiplyByScalar(-1);
vecQ = vecCurPos.Add(vecTarget);
// 设置外扩点
P = curPoint.Clone() as IPoint;
P.Position = vecP;
Q = curPoint.Clone() as IPoint;
Q.Position = vecQ;
// 把点坐标加进顶点数组
va.Append((float)(vecP.X - center.X));
va.Append((float)(vecP.Y - center.Y));
va.Append((float)(vecP.Z - center.Z));
va.Append((float)(vecQ.X - center.X));
va.Append((float)(vecQ.Y - center.Y));
va.Append((float)(vecQ.Z - center.Z));
// 加纹理坐标
ta.Append(0); //P点纹理
if (i == 0)
{
lastV = 0.0;
}
else
{
lastV = lastV + length / 10; //v方向上每隔10米重复一次
}
ta.Append((float)lastV);
ta.Append(1); //Q点纹理
ta.Append((float)lastV);
{
ISimplePointSymbol ps = new SimplePointSymbol();
ps.FillColor = System.Drawing.Color.Yellow;
ps.Size = 5;
rPointToDelList.Add(this.axRenderControl1.ObjectManager.CreateRenderPoint(P, ps, rootId));
rPointToDelList.Add(this.axRenderControl1.ObjectManager.CreateRenderPoint(Q, ps, rootId));
}
break;
}
#endregion
// 当不是最后一个点时：
curPoint = polyline.GetPoint(i);
nextPoint = polyline.GetPoint(i + 1);
vecCurPos = curPoint.Position;
vecNextPos = nextPoint.Position;
// 运算
vecNextPos.MultiplyByScalar(-1);
vecDirect = vecCurPos.Add(vecNextPos); //方向向量
vecZ.Set(0, 0, 1);
vecTarget = vecDirect.CrossProduct(vecZ);
vecTarget.Normalize();
vecTarget.MultiplyByScalar(width / 2);
vecP = vecCurPos.Add(vecTarget);
vecTarget.MultiplyByScalar(-1);
vecQ = vecCurPos.Add(vecTarget);
// 设置外扩点
P = curPoint.Clone() as IPoint;
P.Position = vecP;
Q = curPoint.Clone() as IPoint;
Q.Position = vecQ;
// 把点坐标加进顶点数组
va.Append((float)(vecP.X - center.X));
va.Append((float)(vecP.Y - center.Y));
va.Append((float)(vecP.Z - center.Z));
va.Append((float)(vecQ.X - center.X));
va.Append((float)(vecQ.Y - center.Y));
va.Append((float)(vecQ.Z - center.Z));
// 加纹理坐标
ta.Append(0); //P点纹理
if (i == 0)
{
lastV = 0.0;
}
else
{
lastV = lastV + length / 5; //v方向上每隔10米重复一次
}
length = vecDirect.Length; //计算长度给奇数点用
ta.Append((float)lastV);
ta.Append(1); //Q点纹理
ta.Append((float)lastV);
{
ISimplePointSymbol ps = new SimplePointSymbol();
ps.FillColor = System.Drawing.Color.Yellow;
ps.Size = 5;
rPointToDelList.Add(this.axRenderControl1.ObjectManager.CreateRenderPoint(P, ps, rootId));
rPointToDelList.Add(this.axRenderControl1.ObjectManager.CreateRenderPoint(Q, ps, rootId));
}
}
// 计算索引坐标
IUInt16Array ia = new UInt16Array();
for (int i = 0; i < va.Length / 6 - 1; i++)
{
ia.Append((ushort)(2 * i));
ia.Append((ushort)(2 * i + 1));
ia.Append((ushort)(2 * i + 2));
ia.Append((ushort)(2 * i + 1));
ia.Append((ushort)(2 * i + 3));
ia.Append((ushort)(2 * i + 2));
}
primitive.VertexArray = va;
primitive.TexcoordArray = ta;
primitive.IndexArray = ia;
primitive.Material = material;
group.AddPrimitive(primitive);
model.AddGroup(group);
// 在内存中临时存储模型
string modelName = fid.ToString();
this.axRenderControl1.ObjectManager.AddModel(modelName, model);
mp.ModelName = modelName;
mp.ModelEnvelope = model.Envelope;
// 可视化临时模型
IRenderModelPoint rmp = this.axRenderControl1.ObjectManager.CreateRenderModelPoint(mp, null, rootId);
rmp.MaxVisibleDistance = 100000;
rmp.MouseSelectMask = gviViewportMask.gviViewNone;
rModelpointToDelList.Add(rmp);
}
}
catch (System.Exception ex)
{
if (ex.GetType().Name.Equals("UnauthorizedAccessException"))
{
MessageBox.Show("需要标准runtime授权");
}
else
{
MessageBox.Show(ex.Message);
}
}
}