//AE+C#修改栅格数据像素值
//private void ChangeRasterValue(IRasterDataset2 pRasterDatset, double dbScale, double dbOffset)
//{
// IRaster2 pRaster2 = pRasterDatset.CreateFullRaster() as IRaster2;
// IPnt pPntBlock = new PntClass();
// pPntBlock.X = 128;
// pPntBlock.Y = 128;
// IRasterCursor pRasterCursor = pRaster2.CreateCursorEx(pPntBlock);
// IRasterEdit pRasterEdit = pRaster2 as IRasterEdit;
// if (pRasterEdit.CanEdit())
// {
// IRasterBandCollection pBands = pRasterDatset as IRasterBandCollection;
// IPixelBlock3 pPixelblock3 = null;
// int pBlockwidth = 0;
// int pBlockheight = 0;
// System.Array pixels;
// IPnt pPnt = null;
// object pValue;
// long pBandCount = pBands.Count;
// //获取Nodata
// IRasterProps pRasterPro = pRaster2 as IRasterProps;
// object pNodata = pRasterPro.NoDataValue;
// //double dbNoData = Convert.ToDouble(((double[])pNodata)[0]);
// double dbNoData = getNoDataValue(pNodata);
// if (double.IsNaN(dbNoData))
// return;
// do
// {
// pPixelblock3 = pRasterCursor.PixelBlock as IPixelBlock3;
// pBlockwidth = pPixelblock3.Width;
// pBlockheight = pPixelblock3.Height;
// for (int k = 0; k < pBandCount; k++)
// {
// pixels = (System.Array)pPixelblock3.get_PixelData(k);
// for (int i = 0; i < pBlockwidth; i++)
// {
// for (int j = 0; j < pBlockheight; j++)
// {
// pValue = pixels.GetValue(i, j);
// double ob = Convert.ToDouble(pValue);
// if (ob != dbNoData)
// {
// ob *= dbScale; //翻转
// ob += dbOffset; //Z方向偏移
// }
// //pixels.SetValue(ob, i, j);
// IRasterProps pRP = pRaster2 as IRasterProps;
// if (pRP.PixelType == rstPixelType.PT_CHAR)
// pixels.SetValue(Convert.ToChar(ob), i, j);
// else if (pRP.PixelType == rstPixelType.PT_UCHAR)
// pixels.SetValue(Convert.ToByte(ob), i, j);
// else if (pRP.PixelType == rstPixelType.PT_FLOAT)
// pixels.SetValue(Convert.ToSingle(ob), i, j);
// else if (pRP.PixelType == rstPixelType.PT_DOUBLE)
// pixels.SetValue(Convert.ToDouble(ob), i, j);
// else if (pRP.PixelType == rstPixelType.PT_ULONG)
// pixels.SetValue(Convert.ToInt32(ob), i, j);
// else
// ;
// }
// }
// pPixelblock3.set_PixelData(k, pixels);
// System.Array textPixel = null;
// textPixel = (System.Array)pPixelblock3.get_PixelData(k);
// }
// pPnt = pRasterCursor.TopLeft;
// pRasterEdit.Write(pPnt, (IPixelBlock)pPixelblock3);
// }
// while (pRasterCursor.Next());
// pRasterEdit.Refresh();
// System.Runtime.InteropServices.Marshal.ReleaseComObject(pRasterEdit);
// }
//}
private bool rasterTransfer(IRasterLayer pRasterLayer, string szFilename, double[] dbRotateMatrix, double[] dbOffsetMatrix)
{
if (pRasterLayer == null || dbRotateMatrix == null || dbOffsetMatrix == null || dbRotateMatrix.Length != 9 || dbOffsetMatrix.Length != 3)
{
return(false);
}
//IRasterLayer pResultLayer = new RasterLayerClass();
//pResultLayer.CreateFromRaster(pRasterLayer.Raster);
//pResult = new RasterLayer();
//pResult.co
IGeoReference pGeoReference = pRasterLayer as IGeoReference;
//XY平面平移和旋转
double dbScale = Math.Sqrt(dbRotateMatrix[0] * dbRotateMatrix[0] + dbRotateMatrix[1] * dbRotateMatrix[1]);
double dbTheta = Math.Acos(dbRotateMatrix[0] / dbScale);
IPoint pt = new PointClass();
pt.X = 0; pt.Y = 0;
pGeoReference.Rotate(pt, -dbTheta / Math.PI * 180); //旋转
pGeoReference.Shift(-dbOffsetMatrix[0], -dbOffsetMatrix[1]); //平移
//pGeoReference.Rotate(pt, dbTheta / Math.PI * 180); //旋转
pGeoReference.ReScale(1 / dbScale, 1 / dbScale); //拉伸
try
{
if (!File.Exists(szFilename))
{
pGeoReference.Rectify(szFilename, "TIFF");
IRaster2 pRaster2 = pRasterLayer.Raster as IRaster2;
IRasterEdit pRasterEdit = pRaster2 as IRasterEdit;
System.Runtime.InteropServices.Marshal.ReleaseComObject(pRasterEdit);
}
//MessageBox.Show("转换完成！");
}
catch (System.Exception ex)
{
//MessageBox.Show("转换出错！");
return(false);
}
finally
{
pGeoReference.Reset();
}
//Open a raster file workspace.
IWorkspaceFactory workspaceFactory = new RasterWorkspaceFactoryClass();
IRasterWorkspace rasterWorkspace = (IRasterWorkspace)
workspaceFactory.OpenFromFile(System.IO.Path.GetDirectoryName(szFilename), 0);
//Open a file raster dataset.
IRasterDataset rasterDataset = rasterWorkspace.OpenRasterDataset(System.IO.Path.GetFileName(szFilename));
IRasterDataset2 rasterDataset2 = rasterDataset as IRasterDataset2;
ClsRasterOp pRasterOp = new ClsRasterOp();
pRasterOp.ChangeRasterValue(rasterDataset2, dbRotateMatrix[8], dbOffsetMatrix[2]);
////Z方向变化
//System.Array pixels, dstPixels;
//IPixelBlock3 pixelBlock3 = null;
//IRaster2 pRaster2 = rasterDataset.Raster as IRaster2;
//IRaster pRaster = pDstLayer.Raster;
//IRasterEdit pEdit = pRaster as IRasterEdit;
//IRasterCursor rasterCursor = pRaster2.CreateCursorEx(null);//null时为128*128
//do
//{
// IPnt nSize = new PntClass();
// nSize.X = rasterCursor.PixelBlock.Width;
// nSize.Y = rasterCursor.PixelBlock.Height;
// pixelblock4 = rasterCursor.PixelBlock as IPixelBlock3;
// pixelBlock3 = pRaster.CreatePixelBlock(nSize) as IPixelBlock3;
// int nWidth = pixelBlock3.Width;
// int nHeight = pixelBlock3.Height;
// pixels = (System.Array)pixelBlock3.get_PixelData(0);
// dstPixels = (System.Array)pixelblock4.get_PixelData(0);
// for (int i = 0; i < nWidth; i++)
// {
// for (int j = 0; j < nHeight; j++)
// {
// object obj = pixels.GetValue(i, j);
// double ob = Convert.ToDouble(obj);
// ob *= dbRotateMatrix[8]; //翻转
// ob += dbOffsetMatrix[2]; //Z方向偏移
// dstPixels.SetValue(ob, i, j);
// }
// }
// //写回数据
// pEdit.Write(rasterCursor.TopLeft, pixelblock4 as IPixelBlock);
//} while (rasterCursor.Next() == true);
return(true);
}
