{ Apophysis Copyright (C) 2001-2004 Mark Townsend Apophysis Copyright (C) 2005-2006 Ronald Hordijk, Piotr Borys, Peter Sdobnov Apophysis Copyright (C) 2007-2008 Piotr Borys, Peter Sdobnov Apophysis "3D hack" Copyright (C) 2007-2008 Peter Sdobnov Apophysis "7X" Copyright (C) 2009-2010 Georg Kiehne Apophysis AV "Phoenix Edition" Copyright (C) 2021 Alice V. Koryagina This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. } unit varHypertile; interface uses BaseVariation, XFormMan; type TVariationHypertile = class(TBaseVariation) private hypertile_p, hypertile_q, hypertile_n: integer; re, im: double; public constructor Create; class function GetName: string; override; class function GetInstance: TBaseVariation; override; function GetNrVariables: integer; override; function GetVariableNameAt(const Index: integer): string; override; function SetVariable(const Name: string; var value: double): boolean; override; function GetVariable(const Name: string; var value: double): boolean; override; function ResetVariable(const Name: string): boolean; override; procedure Prepare; override; procedure CalcFunction; override; end; implementation uses Math; /////////////////////////////////////////////////////////////////////////////// procedure TVariationHypertile.Prepare; var t, pa, qa, r: double; begin pa := PI2 / hypertile_p; qa := PI2 / hypertile_q; t := cos(pa); r := (1 - t) / (t + cos(qa)) + 1; if (r > 0) then r := 1 / sqrt(r) else r := 1; t := hypertile_n * pa; SinCos(t, pa, qa); re := r * qa; im := r * pa; end; procedure TVariationHypertile.CalcFunction; var u, v, s, t, vr: double; begin u := FTx^ + re; v := FTy^ - im; s := re * FTx^ - im * FTy^ + 1; t := re * FTy^ + im * FTx^; vr := vvar / (sqr(s) + sqr(t)); FPx^ := FPx^ + vr * (u * s + v * t); FPy^ := FPy^ + vr * (v * s - u * t); // FPz^ := FPz^ + VVAR * FTz^; end; /////////////////////////////////////////////////////////////////////////////// constructor TVariationHypertile.Create; begin hypertile_p := 3; hypertile_q := 7; hypertile_n := 0; end; /////////////////////////////////////////////////////////////////////////////// class function TVariationHypertile.GetInstance: TBaseVariation; begin Result := TVariationHypertile.Create; end; /////////////////////////////////////////////////////////////////////////////// class function TVariationHypertile.GetName: string; begin Result := 'hypertile'; end; /////////////////////////////////////////////////////////////////////////////// function TVariationHypertile.GetVariableNameAt(const Index: integer): string; begin case Index Of 0: Result := 'hypertile_p'; 1: Result := 'hypertile_q'; 2: Result := 'hypertile_n'; else Result := ''; end end; /////////////////////////////////////////////////////////////////////////////// function TVariationHypertile.SetVariable(const Name: string; var value: double): boolean; begin Result := False; if Name = 'hypertile_p' then begin if Value < 3 then Value := 3; hypertile_p := Round(Value); Result := True; end else if Name = 'hypertile_q' then begin if Value < 3 then Value := 3; hypertile_q := Round(Value); Result := True; end else if Name = 'hypertile_n' then begin hypertile_n := Round(Value); Result := True; end; end; function TVariationHypertile.ResetVariable(const Name: string): boolean; begin Result := False; if Name = 'hypertile_p' then begin hypertile_p := 3; Result := True; end else if Name = 'hypertile_q' then begin hypertile_q := 7; Result := True; end else if Name = 'hypertile_n' then begin hypertile_n := 0; Result := True; end; end; /////////////////////////////////////////////////////////////////////////////// function TVariationHypertile.GetNrVariables: integer; begin Result := 3; end; /////////////////////////////////////////////////////////////////////////////// function TVariationHypertile.GetVariable(const Name: string; var value: double): boolean; begin Result := False; if Name = 'hypertile_p' then begin Value := hypertile_p; Result := True; end else if Name = 'hypertile_q' then begin Value := hypertile_q; Result := True; end else if Name = 'hypertile_n' then begin Value := hypertile_n; Result := True; end; end; /////////////////////////////////////////////////////////////////////////////// initialization RegisterVariation(TVariationClassLoader.Create(TVariationHypertile), false, false); end.