270 lines
7.0 KiB
ObjectPascal
270 lines
7.0 KiB
ObjectPascal
{
|
|
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 varJulian2DC;
|
|
|
|
interface
|
|
|
|
uses
|
|
BaseVariation, XFormMan;
|
|
|
|
const
|
|
j2power = 'julian2dc_power';
|
|
j2dist = 'julian2dc_dist';
|
|
j2col = 'julian2dc_col';
|
|
j2a = 'julian2dc_a';
|
|
j2b = 'julian2dc_b';
|
|
j2c = 'julian2dc_c';
|
|
j2d = 'julian2dc_d';
|
|
j2e = 'julian2dc_e';
|
|
j2f = 'julian2dc_f';
|
|
|
|
jeps: double = 1E-5;
|
|
|
|
type
|
|
TVariationJulian2DC = class(TBaseVariation)
|
|
private
|
|
jdist, jcol, jpower, ja, jb, jc, jd, je, jf: double;
|
|
cN, pi2, jps, absN, den: double;
|
|
psn: smallint;
|
|
|
|
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;
|
|
|
|
{ TVariationJulian2DC }
|
|
|
|
//////////////////////////////////////////
|
|
procedure TVariationJulian2DC.Prepare;
|
|
begin
|
|
absN := abs(jpower);
|
|
if (jpower > 0) then psn := 1 else psn := -1;
|
|
den := jpower + psn * jeps;
|
|
if (absN < 1) then
|
|
jps := 1 / den
|
|
else jps := jpower;
|
|
cN := jdist / jps / 2;
|
|
pi2 := pi * 2;
|
|
end;
|
|
|
|
//////////////////////////////////////////
|
|
procedure TVariationJulian2DC.CalcFunction;
|
|
var
|
|
x, y, r, angle, sina, cosa: double;
|
|
ra: integer;
|
|
begin
|
|
x := ja * FTx^ + jb * FTy^ + je;
|
|
y := jc * FTx^ + jd * FTy^ + jf;
|
|
|
|
ra := Trunc(random * (absN - jeps));
|
|
angle := (arctan2(y, x) + pi2 * ra)/ den;
|
|
r := vvar * Math.power(sqr(x) + sqr(y), cN);
|
|
|
|
SinCos(angle, sina, cosa);
|
|
FPx^ := FPx^ + r * cosa;
|
|
FPy^ := FPy^ + r * sina;
|
|
color^ := fmod(abs(r * jcol + (angle / pi2) * (1 - jcol)), 1.0);
|
|
end;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
constructor TVariationJulian2DC.Create;
|
|
var beta, sinb, cosb: double;
|
|
begin
|
|
beta := pi / RandomRange(1, 6);
|
|
SinCos(beta, sinb, cosb);
|
|
jpower := 2 + random(5);
|
|
jdist := 1;
|
|
jcol := random;
|
|
ja := cosb;
|
|
jb := sinb;
|
|
jc := -sinb;
|
|
jd := cosb;
|
|
je := 2 * random - 1;
|
|
jf := 2 * random - 1;
|
|
end;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
class function TVariationJulian2DC.GetInstance: TBaseVariation;
|
|
begin
|
|
Result := TVariationJulian2DC.Create;
|
|
end;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
class function TVariationJulian2DC.GetName: string;
|
|
begin
|
|
Result := 'julian2dc';
|
|
end;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
function TVariationJulian2DC.GetVariableNameAt(const Index: integer): string;
|
|
begin
|
|
case Index of
|
|
0: Result := j2power;
|
|
1: Result := j2dist;
|
|
2: Result := j2col;
|
|
3: Result := j2a;
|
|
4: Result := j2b;
|
|
5: Result := j2c;
|
|
6: Result := j2d;
|
|
7: Result := j2e;
|
|
8: Result := j2f;
|
|
else
|
|
Result := '';
|
|
end
|
|
end;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
function TVariationJulian2DC.SetVariable(const Name: string; var value: double): boolean;
|
|
begin
|
|
Result := False;
|
|
if Name = j2power then begin
|
|
if abs(Value) < jeps then Value := jeps;
|
|
jpower := Value;
|
|
Result := True;
|
|
end else if Name = j2dist then begin
|
|
jdist := value;
|
|
Result := True;
|
|
end else if Name = j2col then begin
|
|
jcol := Value;
|
|
Result := True;
|
|
end else if Name = j2a then begin
|
|
ja := Value;
|
|
Result := True;
|
|
end else if Name = j2b then begin
|
|
jb := Value;
|
|
Result := True;
|
|
end else if Name = j2c then begin
|
|
jc := Value;
|
|
Result := True;
|
|
end else if Name = j2d then begin
|
|
jd := Value;
|
|
Result := True;
|
|
end else if Name = j2e then begin
|
|
je := Value;
|
|
Result := True;
|
|
end else if Name = j2f then begin
|
|
jf := Value;
|
|
Result := True;
|
|
end;
|
|
end;
|
|
|
|
function TVariationJulian2DC.ResetVariable(const Name: string): boolean;
|
|
begin
|
|
Result := False;
|
|
if Name = j2power then begin
|
|
jpower := 2;
|
|
Result := True;
|
|
end else if Name = j2dist then begin
|
|
jdist := 1;
|
|
Result := True;
|
|
end else if Name = j2col then begin
|
|
jcol := 0;
|
|
Result := True;
|
|
end else if Name = j2a then begin
|
|
ja := 1;
|
|
Result := True;
|
|
end else if Name = j2b then begin
|
|
jb := 0;
|
|
Result := True;
|
|
end else if Name = j2c then begin
|
|
jc := 0;
|
|
Result := True;
|
|
end else if Name = j2d then begin
|
|
jd := 1;
|
|
Result := True;
|
|
end else if Name = j2e then begin
|
|
je := 0;
|
|
Result := True;
|
|
end else if Name = j2f then begin
|
|
jf := 0;
|
|
Result := True;
|
|
end;
|
|
end;
|
|
|
|
/////////////////////////////////////////////////////////////////////
|
|
|
|
function TVariationJulian2DC.GetNrVariables: integer;
|
|
begin
|
|
Result := 9;
|
|
end;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
function TVariationJulian2DC.GetVariable(const Name: string; var value: double): boolean;
|
|
begin
|
|
Result := False;
|
|
if Name = j2power then begin
|
|
Value := jpower;
|
|
Result := True;
|
|
end else if Name = j2dist then begin
|
|
Value := jdist;
|
|
Result := True;
|
|
end else if Name = j2col then begin
|
|
Value := jcol;
|
|
Result := True;
|
|
end else if Name = j2a then begin
|
|
Value := ja;
|
|
Result := True;
|
|
end else if Name = j2b then begin
|
|
Value := jb;
|
|
Result := True;
|
|
end else if Name = j2c then begin
|
|
Value := jc;
|
|
Result := True;
|
|
end else if Name = j2d then begin
|
|
Value := jd;
|
|
Result := True;
|
|
end else if Name = j2e then begin
|
|
Value := je;
|
|
Result := True;
|
|
end else if Name = j2f then begin
|
|
Value := jf;
|
|
Result := True;
|
|
end;
|
|
end;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
initialization
|
|
RegisterVariation(TVariationClassLoader.Create(TVariationJulian2DC), false, true);
|
|
end.
|