some optimization

2.10/Source/varFan2.pas

@@ -8,7 +8,8 @@ uses
 type
   TVariationFan2 = class(TBaseVariation)
   private
-    FX,FY: double;
+    FX, FY: double;
+    dy, dx, dx2: double;
   public
     constructor Create;
 
@@ -21,7 +22,7 @@ type
     function SetVariable(const Name: string; var value: double): boolean; override;
     function GetVariable(const Name: string; var value: double): boolean; override;
 
-
+    procedure Prepare; override;
     procedure CalcFunction; override;
   end;
 
@@ -33,14 +34,22 @@ uses
 { TVariationTest }
 
 ///////////////////////////////////////////////////////////////////////////////
-procedure TVariationFan2.CalcFunction;
+procedure TVariationFan2.Prepare;
 const
   EPS = 1E-10;
+begin
+  dy := FY;
+  dx := pi * (sqr(FX) + EPS);
+  dx2 := dx/2;
+end;
+
+procedure TVariationFan2.CalcFunction;
 var
-  r,t,a : double;
-  dx, dy, dx2: double;
+  r, a : double;
+  sinr, cosr: double;
   Angle: double;
 begin
+{
   r := sqrt(FTx^ * FTx^ + FTy^ * FTy^);
   if (FTx^ < -EPS) or (FTx^ > EPS) or (FTy^ < -EPS) or (FTy^ > EPS) then
      Angle := arctan2(FTx^, FTy^)
@@ -59,13 +68,32 @@ begin
 
   FPx^ := FPx^ + vvar * r * sin(a);
   FPy^ := FPy^ + vvar * r * cos(a);
+}
+  Angle := arctan2(FTx^, FTy^);
+  if System.Frac((Angle + dy)/dx) > 0.5 then
+    a := Angle - dx2
+  else
+    a := Angle + dx2;
+  asm // SinCos(a, sinr, cosr);
+    FLD     qword ptr [a]
+    FSINCOS
+    FSTP    qword ptr [sinr]
+    FSTP    qword ptr [cosr]
+    FWAIT
+  end;
+  r := vvar * sqrt(sqr(FTx^) + sqr(FTy^));
+  FPx^ := FPx^ + r * cosr;
+  FPy^ := FPy^ + r * sinr;
 end;
 
 ///////////////////////////////////////////////////////////////////////////////
 constructor TVariationFan2.Create;
 begin
-  FX := 2 * Random - 1;
-  FY := 2 * Random - 1;
+  // randomization removed to please mutator users ;-)
+//  FX := 2 * Random - 1;
+//  FY := 2 * Random - 1;
+  FX := 1;
+  FY := 1;
 end;
 
 ///////////////////////////////////////////////////////////////////////////////

2.10/Source/varPerspective.pas

@@ -6,8 +6,8 @@ uses
   BaseVariation, XFormMan;
 
 const
-  var_a_name='perspective_angle';
-  var_f_name='perspective_dist';
+  var_a_name = 'perspective_angle';
+  var_f_name = 'perspective_dist';
 
 type
   TVariationPerspective = class(TBaseVariation)
@@ -39,12 +39,6 @@ uses
 // TVariationPerspective
 
 ///////////////////////////////////////////////////////////////////////////////
-constructor TVariationPerspective.Create;
-begin
-  angle := random;
-  focus := 2*random + 1;
-end;
-
 procedure TVariationPerspective.Prepare;
 begin
   vsin := sin(angle*pi/2);
@@ -84,6 +78,12 @@ asm
 end;
 
 ///////////////////////////////////////////////////////////////////////////////
+constructor TVariationPerspective.Create;
+begin
+  angle := random;
+  focus := 2*random + 1;
+end;
+
 class function TVariationPerspective.GetInstance: TBaseVariation;
 begin
   Result := TVariationPerspective.Create;

2.10/Source/varRings2.pas

@@ -8,7 +8,7 @@ uses
 type
   TVariationRings2 = class(TBaseVariation)
   private
-    FVal: double;
+    FVal, dx: double;
   public
     constructor Create;
 
@@ -21,7 +21,7 @@ type
     function SetVariable(const Name: string; var value: double): boolean; override;
     function GetVariable(const Name: string; var value: double): boolean; override;
 
-
+    procedure Prepare; override;
     procedure CalcFunction; override;
   end;
 
@@ -30,30 +30,37 @@ implementation
 uses
   Math;
 
-const
-  EPS = 1E-10;
-
-
 { TVariationTest }
 
 ///////////////////////////////////////////////////////////////////////////////
+procedure TVariationRings2.Prepare;
+const
+  EPS = 1E-10;
+begin
+  dx := sqr(FVal) + EPS;
+end;
+
 procedure TVariationRings2.CalcFunction;
 var
-  dx,r: double;
+  r: double;
   Length: double;
   Angle: double;
 begin
-  Length := sqrt(FTx^ * FTx^ + FTy^ * FTy^);
+  Length := sqrt(sqr(FTx^) + sqr(FTy^));
+{ // all this range-checking crap only slows us down...
   if (FTx^ < -EPS) or (FTx^ > EPS) or (FTy^ < -EPS) or (FTy^ > EPS) then
-     Angle := arctan2(FTx^, FTy^)
+    Angle := arctan2(FTx^, FTy^)
   else
     Angle := 0.0;
+} // ...and besides, we don't need arctan() if we have Length!
 
-  dx := sqr(FVal) + EPS;
-  r := Length + dx - System.Int((Length + dx)/(2 * dx)) * 2 * dx - dx + Length * (1-dx);
+//  dx := sqr(FVal) + EPS; - we can precalc it!!!
+//  r := Length + dx - System.Int((Length + dx)/(2 * dx)) * 2 * dx - dx + Length * (1-dx);
+//              ^^^^......he he, lots of useless calculation.......^^^^
+  r := vvar * (2 - dx * (System.Int((Length/dx + 1)/2) * 2 / Length + 1));
 
-  FPx^ := FPx^ + vvar * r * sin(Angle);
-  FPy^ := FPy^ + vvar * r * cos(Angle);
+  FPx^ := FPx^ + r * FTx^;
+  FPy^ := FPy^ + r * FTy^;
 end;
 
 ///////////////////////////////////////////////////////////////////////////////

2.10/Source/varblob.pas

@@ -1,4 +1,4 @@
-unit varblob;
+unit varBlob;
 
 interface
 
@@ -8,9 +8,8 @@ uses
 type
   TVariationBlob = class(TBaseVariation)
   private
-    FWaves: double;
-    FLow:   double;
-    FHigh:  double;
+    FLow, FHigh, FWaves: double;
+    VLow, VHeight: double;
   public
     constructor Create;
 
@@ -23,6 +22,7 @@ type
     function SetVariable(const Name: string; var value: double): boolean; override;
     function GetVariable(const Name: string; var value: double): boolean; override;
 
+    procedure Prepare; override;
     procedure CalcFunction; override;
   end;
 
@@ -31,26 +31,45 @@ implementation
 uses
   Math;
 
-{ TVariationTest }
+{ TVariationBlob }
 
 ///////////////////////////////////////////////////////////////////////////////
+procedure TVariationBlob.Prepare;
+begin
+  VHeight := vvar * (FHigh - FLow) / 2;
+  VLow := vvar * FLow + VHeight;
+end;
+
 procedure TVariationBlob.CalcFunction;
-const
-  EPS = 1E-10;
 var
   r : double;
-  Angle: double;
 begin
+{
   r := sqrt(FTx^ * FTx^ + FTy^ * FTy^);
+
   if (FTx^ < -EPS) or (FTx^ > EPS) or (FTy^ < -EPS) or (FTy^ > EPS) then
      Angle := arctan2(FTx^, FTy^)
   else
     Angle := 0.0;
 
   r := r * (FLow + (FHigh - FLow) * (0.5 + 0.5 * sin(FWaves * Angle)));
-
   FPx^ := FPx^ + vvar * r * sin(Angle);
   FPy^ := FPy^ + vvar * r * cos(Angle);
+}
+// --Z-- LOL!!! just look at this:
+//  sin(a) = x / r, (well, normal people use y/r, but since we swapped x and y...)
+//  then:
+//  r * sin(a) = r * x / r = x !!!
+//  so, WE DON'T NEED TO CALCULATE "r" AT ALL!!!!!
+//  (and no need to calculate sin and cos, ofcourse :)
+
+//  r := (FLow + (FHigh - FLow) * (0.5 + 0.5 * sin(FWaves * Angle)));
+//  now let's precalc ^^^^^ all this :)
+  r := VLow + VHeight * sin(FWaves * arctan2(FTx^, FTy^));
+
+  FPx^ := FPx^ + r * FTx^;
+  FPy^ := FPy^ + r * FTy^;
+// mwahaha, 20% speed increase - and I didn't even use any ASM :-)
 end;
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -88,8 +107,6 @@ begin
     FHigh := Value;
     Result := True;
   end else if Name = 'blob_waves' then begin
-    //???????????? what for?:
-    // Value is a var variable the checked/changed value is returned for showing 
     Value := Round(Value);
     FWaves := Value;
     Result := True;

2.10/Source/varpdj.pas

@@ -1,4 +1,4 @@
-unit varpdj;
+unit varPDJ;
 
 interface
 
@@ -30,7 +30,7 @@ implementation
 uses
   Math;
 
-{ TVariationTest }
+{ TVariationPDJ }
 
 ///////////////////////////////////////////////////////////////////////////////
 procedure TVariationPDJ.CalcFunction;