TOpenCLVector.Reverse Method

Overload List

#	Signature	Description
1	function Reverse(const Vec: TOpenCLMtxVec): TOpenCLVector;	Reverse all Vec elements.
	└ indexed: function Reverse(const Vec: TOpenCLMtxVec; VecIndex: Integer; Index: Integer; Len: Integer): TOpenCLMtxVec;
2	function Reverse(Index: Integer; Len: Integer): TOpenCLMtxVec;	Reverses the calling object elements [Index]..[Index+Len-1].

Overload 1: function Reverse(const Vec: TOpenCLMtxVec): TOpenCLVector;

Reverse all Vec elements.

#	Name	Type	Description
1	Vec	TOpenCLMtxVec

Returns: TOpenCLVector

Remarks:

Store the result in the calling vector elements. The TOpenCLBase.Length and TOpenCLBase.Complex roperties of the calling vector are set implicitly to match Vec vector.

\text{V}[k]=\text{Vec}[N-k],\quad 0\leq k \leq N, \quad \text{where } N=\text{Vec.Length}-1

This overload reverses all vector elements.

Examples

var a: TOpenCLVector;
begin
    CreateIt(a,b);
    try
        a.CopyFromArray(TSingleArray.Create(1,2,3,4));
        b.Reverse(a);   // b = [4,3,2,1]
    finally
        FreeIt(a,b);
    end;
end;

See Also: TOpenCLVector.Rotate, TOpenCLVector.Shift

Indexed: function Reverse(const Vec: TOpenCLMtxVec; VecIndex: Integer; Index: Integer; Len: Integer): TOpenCLMtxVec;

Reverse vector elements.

#	Name	Type	Description
1	Vec	TOpenCLMtxVec	source TOpenCLVector or TOpenCLMatrix
2	VecIndex	Integer
3	Index	Integer	start index
4	Len	Integer	element count

Result: stored in self (calling object), returns self for chaining

Remarks:

The method reverses Vec vector elements from [VecIndex].. [VecIndex+Len-1] and stores them in the calling vector from [Index]...[Index+Len-1] by using the following equation:

\text{V}[k]=\text{Vec}[N-k],\quad 0\leq k \leq N, \quad \text{where } N=\text{Vec.Length}-1

This overload reverses calling vector elements in-place.

Examples

var a: clVector;
begin
    a.CopyFromArray(TSingleArray.Create(1,2,3,4));
    a.Reverse;   // a = [4,3,2,1]
end;

Overload 2: function Reverse(Index: Integer; Len: Integer): TOpenCLMtxVec;

Reverses the calling object elements [Index]..[Index+Len-1].

#	Name	Type	Description
1	Index	Integer	start index
2	Len	Integer	element count

Result: stored in self (calling object), returns self for chaining

Remarks:

An exception is raised if array borders are overrun.