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