329 lines
6.7 KiB
ObjectPascal
329 lines
6.7 KiB
ObjectPascal
{ Apophysis AV "Phoenix Edition" Copyright (C) 2021 Alice V. Koryagina }
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unit varSphereCrop;
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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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TVariationSphereCrop = class(TBaseVariation)
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const
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sx : string = 'spherecrop_x';
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sy : string = 'spherecrop_y';
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sz : string = 'spherecrop_z';
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sradius : string = 'spherecrop_radius';
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szero : string = 'spherecrop_zero';
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sarea : string = 'spherecrop_scatter_area';
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smode: string = 'spherecrop_mode';
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private
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x0, y0, z0, radius, scatter_area, ca: double;
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zero, mode: byte;
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procedure CalcPre;
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procedure CalcPost;
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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 Prepare; 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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{ TVariationSphereCrop }
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//////////////////////////////////////////
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procedure TVariationSphereCrop.Prepare;
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begin
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ca := max(-1.0, min(scatter_area, 1.0));
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end;
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procedure TVariationSphereCrop.GetCalcFunction(var f: TCalcFunction);
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begin
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case mode of
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0: f := CalcPre;
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1: f := CalcFunction;
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else f := CalcPost;
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end;
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end;
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procedure TVariationSphereCrop.CalcFunction;
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var
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x, y, z, rad, rdc: double;
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ang, phi, sn, cn, sz, cz: double;
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begin
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x := FTx^ - x0;
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y := FTy^ - y0;
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z := FTz^ - z0;
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rad := Math.Hypot(x, y, z);
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if (rad > radius) then
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begin
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if (zero = 1) then
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begin
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FPx^ := FPx^;
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FPy^ := FPy^;
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FPz^ := FPz^;
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end else
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begin
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ang := arctan2(y, x);
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SinCos(ang, sn, cn);
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phi := arcsin(z / rad);
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SinCos(phi, sz, cz);
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rdc := radius + (random * 0.5 * ca);
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FPx^ := FPx^ + vvar * rdc * cn * cz + x0;
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FPy^ := FPy^ + vvar * rdc * sn * cz + y0;
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FPz^ := FPz^ + vvar * rdc * sz + z0;
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end;
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end else
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begin
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FPx^ := FPx^ + vvar * x + x0;
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FPy^ := FPy^ + vvar * y + y0;
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FPz^ := FPz^ + vvar * z + z0;
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end;
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end;
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procedure TVariationSphereCrop.CalcPost;
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var
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x, y, z, rad, rdc: double;
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ang, phi, sn, cn, sz, cz: double;
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begin
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x := FPx^ - x0;
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y := FPy^ - y0;
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z := FPz^ - z0;
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rad := Math.Hypot(x, y, z);
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if (rad > radius) then
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begin
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if (zero = 1) then
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begin
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FPx^ := 0;
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FPy^ := 0;
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FPz^ := 0;
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end else
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begin
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ang := arctan2(y, x);
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SinCos(ang, sn, cn);
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phi := arcsin(z / rad);
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SinCos(phi, sz, cz);
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rdc := radius + (random * 0.5 * ca);
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FPx^ := vvar * rdc * cn * cz + x0;
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FPy^ := vvar * rdc * sn * cz + y0;
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FPz^ := vvar * rdc * sz + z0;
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end;
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end else
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begin
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FPx^ := vvar * x + x0;
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FPy^ := vvar * y + y0;
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FPz^ := vvar * z + z0;
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end;
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end;
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procedure TVariationSphereCrop.CalcPre;
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var
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x, y, z, rad, rdc: double;
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ang, phi, sn, cn, sz, cz: double;
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begin
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x := FTx^ - x0;
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y := FTy^ - y0;
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z := FTz^ - z0;
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rad := Math.Hypot(x, y, z);
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if (rad > radius) then
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begin
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if (zero = 1) then
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begin
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FTx^ := 0;
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FTy^ := 0;
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FTz^ := 0;
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end else
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begin
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ang := arctan2(y, x);
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SinCos(ang, sn, cn);
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phi := arcsin(z / rad);
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SinCos(phi, sz, cz);
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rdc := radius + (random * 0.5 * ca);
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FTx^ := vvar * rdc * cn * cz + x0;
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FTy^ := vvar * rdc * sn * cz + y0;
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FTz^ := vvar * rdc * sz + z0;
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end;
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end else
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begin
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FTx^ := vvar * x + x0;
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FTy^ := vvar * y + y0;
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FTz^ := vvar * z + z0;
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end;
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end;
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constructor TVariationSphereCrop.Create;
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begin
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x0 := 0;
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y0 := 0;
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z0 := 0;
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radius := 1;
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scatter_area := 0;
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zero := 0;
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mode := 1;
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end;
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class function TVariationSphereCrop.GetInstance: TBaseVariation;
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begin
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Result := TVariationSphereCrop.Create;
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end;
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class function TVariationSphereCrop.GetName: string;
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begin
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Result := 'spherecrop';
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end;
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function TVariationSphereCrop.GetNrVariables: integer;
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begin
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Result := 7;
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end;
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function TVariationSphereCrop.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 = sx then begin
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Value := x0;
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Result := True;
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end
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else if Name = sy then begin
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Value := y0;
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Result := True;
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end
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else if Name = sz then begin
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Value := z0;
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Result := True;
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end
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else if Name = sradius then begin
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Value := radius;
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Result := True;
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end
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else if Name = sarea then begin
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Value := scatter_area;
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Result := True;
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end
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else if Name = szero then begin
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Value := zero;
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Result := True;
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end
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else if Name = smode then begin
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Value := mode;
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Result := True;
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end;
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end;
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function TVariationSphereCrop.GetVariableNameAt(const Index: integer): string;
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begin
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case Index Of
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0: Result := sradius;
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1: Result := sx;
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2: Result := sy;
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3: Result := sz;
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4: Result := sarea;
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5: Result := szero;
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6: Result := smode;
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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 TVariationSphereCrop.ResetVariable(const Name: string): boolean;
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begin
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Result := False;
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if Name = sx then begin
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x0 := 0;
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Result := True;
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end
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else if Name = sy then begin
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y0 := 0;
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Result := True;
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end
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else if Name = sz then begin
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z0 := 0;
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Result := True;
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end
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else if Name = sradius then begin
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radius := 1;
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Result := True;
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end
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else if Name = sarea then begin
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scatter_area := 0;
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Result := True;
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end
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else if Name = szero then begin
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zero := 0;
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Result := True;
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end
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else if Name = smode then begin
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mode := 1;
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Result := True;
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end;
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end;
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function TVariationSphereCrop.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 = sx then begin
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x0 := Value;
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Result := True;
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end
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else if Name = sy then begin
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y0 := Value;
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Result := True;
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end
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else if Name = sz then begin
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z0 := Value;
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Result := True;
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end
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else if Name = sradius then begin
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radius := Value;
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Result := True;
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end
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else if Name = sarea then begin
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scatter_area := Value;
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Result := True;
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end
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else if Name = szero 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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zero := Round(Value);
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Result := True;
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end
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else if Name = smode then begin
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if Value < 0 then Value := 0;
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if Value > 2 then Value := 2;
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mode := 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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initialization
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RegisterVariation(TVariationClassLoader.Create(TVariationSphereCrop), true, false);
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end.
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