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{
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
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 varRadialBlur;
interface
uses
BaseVariation, XFormMan;
const
var_name = 'radial_blur';
var_a_name = 'radial_blur_angle';
{$ifdef Apo7X64}
{$else}
{$define _ASM_}
{$endif}
type
TVariationRadialBlur = class(TBaseVariation)
private
angle,
spin_var, zoom_var: double;
rnd: array[0..3] of double;
N: integer;
procedure CalcZoom;
procedure CalcSpin;
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 GetVariable(const Name: string; var value: double): boolean; override;
function SetVariable(const Name: string; var value: double): boolean; override;
function ResetVariable(const Name: string): boolean; override;
procedure Prepare; override;
procedure CalcFunction; override;
procedure GetCalcFunction(var f: TCalcFunction); override;
end;
implementation
uses
math;
// TVariationRadialBlur
///////////////////////////////////////////////////////////////////////////////
constructor TVariationRadialBlur.Create;
begin
angle := random * 2 - 1;
end;
procedure TVariationRadialBlur.Prepare;
begin
spin_var := vvar * sin(angle * pi/2);
zoom_var := vvar * cos(angle * pi/2);
N := 0;
rnd[0] := random;
rnd[1] := random;
rnd[2] := random;
rnd[3] := random;
end;
///////////////////////////////////////////////////////////////////////////////
procedure TVariationRadialBlur.GetCalcFunction(var f: TCalcFunction);
begin
if IsZero(spin_var) then f := CalcZoom
else if IsZero(zoom_var) then f := CalcSpin
else f := CalcFunction;
end;
///////////////////////////////////////////////////////////////////////////////
procedure TVariationRadialBlur.CalcFunction;
var
rndG, rz, ra: double;
sina, cosa: extended;
begin
rndG := (rnd[0] + rnd[1] + rnd[2] + rnd[3] - 2);
rnd[N] := random;
N := (N+1) and $3;
ra := sqrt(sqr(FTx^) + sqr(FTy^));
SinCos(arctan2(FTy^, FTx^) + spin_var * rndG, sina, cosa);
rz := zoom_var * rndG - 1;
FPx^ := FPx^ + ra * cosa + rz * FTx^;
FPy^ := FPy^ + ra * sina + rz * FTy^;
FPz^ := FPz^ + vvar * FTz^;
end;
///////////////////////////////////////////////////////////////////////////////
procedure TVariationRadialBlur.CalcZoom;
var
r: double;
begin
r := zoom_var * (rnd[0] + rnd[1] + rnd[2] + rnd[3] - 2);
rnd[N] := random;
N := (N+1) and $3;
FPx^ := FPx^ + r * FTx^;
FPy^ := FPy^ + r * FTy^;
FPz^ := FPz^ + vvar * FTz^;
end;
///////////////////////////////////////////////////////////////////////////////
procedure TVariationRadialBlur.CalcSpin;
var
r: double;
sina, cosa: extended;
begin
SinCos(arctan2(FTy^, FTx^) + spin_var * (rnd[0] + rnd[1] + rnd[2] + rnd[3] - 2),
sina, cosa);
r := sqrt(sqr(FTx^) + sqr(FTy^));
rnd[N] := random;
N := (N+1) and $3;
FPx^ := FPx^ + r * cosa - FTx^;
FPy^ := FPy^ + r * sina - FTy^;
FPz^ := FPz^ + vvar * FTz^;
end;
///////////////////////////////////////////////////////////////////////////////
class function TVariationRadialBlur.GetInstance: TBaseVariation;
begin
Result := TVariationRadialBlur.Create;
end;
///////////////////////////////////////////////////////////////////////////////
class function TVariationRadialBlur.GetName: string;
begin
Result := var_name;
end;
///////////////////////////////////////////////////////////////////////////////
function TVariationRadialBlur.GetVariableNameAt(const Index: integer): string;
begin
case Index of
0: Result := var_a_name;
else
Result := '';
end
end;
///////////////////////////////////////////////////////////////////////////////
function TVariationRadialBlur.GetVariable(const Name: string; var value: double): boolean;
begin
Result := False;
if Name = var_a_name then begin
Value := angle;
Result := true;
end;
end;
function TVariationRadialBlur.SetVariable(const Name: string; var value: double): boolean;
begin
Result := False;
if Name = var_a_name then begin
angle := Value;
Result := True;
end;
end;
function TVariationRadialBlur.ResetVariable(const Name: string): boolean;
begin
Result := False;
if Name = var_a_name then begin
if angle <> 0 then angle := 0
else if angle = 0 then angle := 1;
Result := True;
end;
end;
///////////////////////////////////////////////////////////////////////////////
function TVariationRadialBlur.GetNrVariables: integer;
begin
Result := 1;
end;
///////////////////////////////////////////////////////////////////////////////
initialization
RegisterVariation(TVariationClassLoader.Create(TVariationRadialBlur), true, false);
end.

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