Trigonometry

In this operation a trigonometrical operation is applied to every pixel in a raster band. The raster band is overwritten with the result of the operation.

The operation is provided in a high-level and a low-level format. In the high-level format a raster object, a band identifier and a token are specified. The operation applies to all pixels and the result is stored in the specified band. In the low-level format the operation is applied to a block of contiguous memory containing a specified number of pixels. The low-level format is useful to chain a number of operations without the overhead of storing intermediate results.

If you want to preserve the original raster band, you should make a copy of the band first.

High-level declarations:

procedure DSpGMSin(const r: TDSpRaster; const band, token: integer);
procedure DSpGMCos(const r: TDSpRaster; const band, token: integer);
procedure DSpGMTan(const r: TDSpRaster; const band, token: integer);
procedure DSpGMArcSin(const r: TDSpRaster; const band, token: integer);
procedure DSpGMArcCos(const r: TDSpRaster; const band, token: integer);
procedure DSpGMArcTan(const r: TDSpRaster; const band, token: integer);

Low-level declarations:

procedure DSpGMSinFloat32
procedure DSpGMSinFloat64
procedure DSpGMCosFloat32
procedure DSpGMCosFloat64
procedure DSpGMTanFloat32
procedure DSpGMTanFloat64
procedure DSpGMArcSinFloat32
procedure DSpGMArcSinFloat64
procedure DSpGMArcCosFloat32
procedure DSpGMArcCosFloat64
procedure DSpGMArcTanFloat32
procedure DSpGMArcTanFloat64
                        (const data: pointer; pixels: integer;
                         fill: TDSpFloat64);