134 lines
3.3 KiB
ObjectPascal
134 lines
3.3 KiB
ObjectPascal
{ Apophysis AV "Phoenix Edition" Copyright (C) 2021 Alice V. Koryagina }
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unit varSecant;
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interface
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uses
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BaseVariation, XFormMan;
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type
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TVariationSecant = class(TBaseVariation)
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private
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old: byte;
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procedure CalcSecant2;
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public
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constructor Create;
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class function GetName: string; override;
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class function GetInstance: TBaseVariation; override;
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function GetNrVariables: integer; override;
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function GetVariableNameAt(const Index: integer): string; override;
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function SetVariable(const Name: string; var value: double): boolean; override;
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function GetVariable(const Name: string; var value: double): boolean; override;
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procedure CalcFunction; override;
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procedure GetCalcFunction(var f: TCalcFunction); override;
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end;
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implementation
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uses
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Math;
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{ TVariationSecant }
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///////////////////////////////////////////////////////////////////////////////
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constructor TVariationSecant.Create;
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begin
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old := 0;
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end;
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///////////////////////////////////////////////////////////////////////////////
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procedure TVariationSecant.GetCalcFunction(var f: TCalcFunction);
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begin
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if old = 1 then f := CalcFunction
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else f := CalcSecant2;
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end;
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///////////////////////////////////////////////////////////////////////////////
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procedure TVariationSecant.CalcFunction;
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var
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r: double;
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begin
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r := sqrt(sqr(FTx^) + sqr(FTy^)) * vvar;
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r := cos(r);
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if (r = 0) then exit;
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FPx^ := FPx^ + FTx^ * vvar;
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FPy^ := FPy^ + 1 / r;
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end;
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procedure TVariationSecant.CalcSecant2;
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var
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r: double;
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begin
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r := sqrt(sqr(FTx^) + sqr(FTy^)) * vvar;
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r := cos(r);
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if (r = 0) then exit;
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FPx^ := FPx^ + FTx^ * vvar;
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if (r < 0) then
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FPy^ := FPy^ + (1 / r + 1) * vvar
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else
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FPy^ := FPy^ + (1 / r - 1) * vvar;
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end;
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///////////////////////////////////////////////////////////////////////////////
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class function TVariationSecant.GetInstance: TBaseVariation;
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begin
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Result := TVariationSecant.Create;
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end;
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///////////////////////////////////////////////////////////////////////////////
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class function TVariationSecant.GetName: string;
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begin
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Result := 'secant2';
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end;
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///////////////////////////////////////////////////////////////////////////////
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function TVariationSecant.GetVariableNameAt(const Index: integer): string;
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begin
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case Index Of
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0: Result := 'secant2_old';
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else
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Result := '';
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end;
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end;
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///////////////////////////////////////////////////////////////////////////////
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function TVariationSecant.SetVariable(const Name: string; var value: double): boolean;
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begin
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Result := False;
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if Name = 'secant2_old' then
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begin
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if Value < 0 then Value := 0;
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if Value > 1 then Value := 1;
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old := Round(value);
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Result := True;
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end;
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end;
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///////////////////////////////////////////////////////////////////////////////
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function TVariationSecant.GetNrVariables: integer;
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begin
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Result := 1;
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end;
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///////////////////////////////////////////////////////////////////////////////
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function TVariationSecant.GetVariable(const Name: string; var value: double): boolean;
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begin
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Result := False;
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if Name = 'secant2_old' then
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begin
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Value := old;
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Result := True;
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end;
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end;
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///////////////////////////////////////////////////////////////////////////////
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initialization
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RegisterVariation(TVariationClassLoader.Create(TVariationSecant), false, false);
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end.
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