128 lines
2.8 KiB
ObjectPascal
128 lines
2.8 KiB
ObjectPascal
{ Apophysis AV "Phoenix Edition" Copyright (C) 2021 Alice V. Koryagina }
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unit varHandkerchief;
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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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TVariationHandkerchief = class(TBaseVariation)
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private
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old: byte;
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procedure CalcPlugin;
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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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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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////////////////////////
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procedure TVariationHandkerchief.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 := CalcPlugin;
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end;
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procedure TVariationHandkerchief.CalcFunction;
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var
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r, FAngle: double;
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begin
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FAngle := arctan2(FTx^, FTy^);
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r := sqrt(sqr(FTx^) + sqr(FTy^));
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FPx^ := FPx^ + vvar * sin(FAngle + r) * r;
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FPy^ := FPy^ + vvar * cos(FAngle - r) * r;
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end;
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procedure TVariationHandkerchief.CalcPlugin;
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var
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r, FAngle: double;
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begin
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FAngle := arctan2(FTy^, FTx^);
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r := sqrt(sqr(FTx^) + sqr(FTy^));
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FPx^ := FPx^ + vvar * sin(FAngle + r) * r;
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FPy^ := FPy^ + vvar * cos(FAngle - r) * r;
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end;
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constructor TVariationHandkerchief.Create;
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begin
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old := 1;
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end;
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class function TVariationHandkerchief.GetInstance: TBaseVariation;
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begin
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Result := TVariationHandkerchief.Create;
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end;
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class function TVariationHandkerchief.GetName: string;
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begin
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Result := 'handkerchief';
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end;
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function TVariationHandkerchief.GetNrVariables: integer;
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begin
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Result := 1;
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end;
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function TVariationHandkerchief.GetVariable(const Name: string;
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var value: double): boolean;
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begin
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Result := False;
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if Name = 'handkerchief_old' then 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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function TVariationHandkerchief.GetVariableNameAt(const Index: integer): string;
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begin
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case Index of
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0: Result := 'handkerchief_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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function TVariationHandkerchief.SetVariable(const Name: string;
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var value: double): boolean;
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begin
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Result := False;
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if Name = 'handkerchief_old' then 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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function TVariationHandkerchief.ResetVariable(const Name: string): boolean;
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begin
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Result := False;
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if Name = 'handkerchief_old' then begin
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old := 1;
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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(TVariationHandkerchief), false, false);
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end.
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