118 lines
2.4 KiB
ObjectPascal
118 lines
2.4 KiB
ObjectPascal
{
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Apophysis AV "Phoenix Edition" Copyright (C) 2021 Alice V. Koryagina
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"Chaotica" Copyright (C) 2019 Glare Technologies Limited
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}
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unit varTanhSpiral;
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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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TVariationTanhSpiral = class(TBaseVariation)
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private
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ta: double;
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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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function ResetVariable(const Name: string): boolean; override;
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procedure CalcFunction; 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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////////////////////////
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procedure TVariationTanhSpiral.CalcFunction;
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var
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t, aux, sn, cn, snh, cnh: double;
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begin
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t := (random - 0.5) * PI2;
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SinCos(ta * t, sn, cn);
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SinhCosh(t, snh, cnh);
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aux := (cn + cnh);
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if aux = 0 then aux := 1e-20;
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aux := vvar / aux;
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FPx^ := FPx^ + snh * aux;
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FPy^ := FPy^ + sn * aux;
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end;
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constructor TVariationTanhSpiral.Create;
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begin
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inherited Create;
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ta := 4;
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end;
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class function TVariationTanhSpiral.GetInstance: TBaseVariation;
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begin
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Result := TVariationTanhSpiral.Create;
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end;
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class function TVariationTanhSpiral.GetName: string;
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begin
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Result := 'tanh_spiral';
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end;
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function TVariationTanhSpiral.GetNrVariables: integer;
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begin
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Result := 1;
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end;
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function TVariationTanhSpiral.GetVariableNameAt(const Index: integer): string;
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begin
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case Index Of
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0: Result := 'tanh_spiral_a';
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else
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Result := '';
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end;
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end;
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function TVariationTanhSpiral.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 = 'tanh_spiral_a' then begin
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Value := ta;
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Result := True;
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end;
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end;
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function TVariationTanhSpiral.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 = 'tanh_spiral_a' then begin
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ta := Value;
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Result := True;
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end;
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end;
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function TVariationTanhSpiral.ResetVariable(const Name: string): boolean;
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begin
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Result := False;
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if Name = 'tanh_spiral_a' then begin
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ta := 4;
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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(TVariationTanhSpiral), false, false);
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end.
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