312 lines
7.4 KiB
ObjectPascal
312 lines
7.4 KiB
ObjectPascal
{ Apophysis AV "Phoenix Edition" Copyright (C) 2021 Alice V. Koryagina }
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unit varTriangleCrop;
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interface
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uses
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BaseVariation, XFormMan;
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type
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TVariationTriangleCrop = class(TBaseVariation)
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private
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alpha, beta, Cx, Cy, Ax, Ay: double;
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mode, zero: byte;
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function IsP_Inside(Cx, Cy, Px, Py: double): boolean;
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procedure CalcPre;
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procedure CalcPost;
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public
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constructor Create;
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class function GetName: string; override;
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class function GetInstance: TBaseVariation; override;
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function GetNrVariables: integer; override;
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function GetVariableNameAt(const Index: integer): string; override;
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function SetVariable(const Name: string; var value: double): boolean; override;
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function GetVariable(const Name: string; var value: double): boolean; override;
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function ResetVariable(const Name: string): boolean; override;
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procedure Prepare; override;
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procedure CalcFunction; override;
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procedure GetCalcFunction(var f: TCalcFunction); override;
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end;
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implementation
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uses
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Math;
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{ TVariationTriangleCrop }
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///////////////////////////////////////////////////////////////////////////////
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procedure TVariationTriangleCrop.Prepare;
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var
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side, gamma, sa, ca: double;
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begin
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gamma := (180 - alpha - beta) * pi / 180;
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side := sin(beta * pi / 180) / sin(gamma);
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SinCos(alpha * pi / 180, sa, ca);
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Cx := side * ca;
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Cy := -side * sa;
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end;
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procedure TVariationTriangleCrop.GetCalcFunction(var f: TCalcFunction);
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begin
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case mode of
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0: f := CalcPre;
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1: f := CalcFunction;
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else f := CalcPost;
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end;
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end;
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function TVariationTriangleCrop.IsP_Inside(Cx, Cy, Px, Py: double): boolean;
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var
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m, n : double;
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begin
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Result := False;
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m := Py / Cy;
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if (m >= 0) and (m <= 1) then
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begin
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n := Px - m * Cx;
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if (n >= 0) and ((m + n) <= 1) then
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Result := True;
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end;
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end;
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procedure TVariationTriangleCrop.CalcPre;
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var x, y, k: double;
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begin
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x := FTx^ - Ax;
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y := FTy^ + Ay;
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if not IsP_Inside(Cx, Cy, x, y) then
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begin
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if (zero = 1) then
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begin
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x := 0; y := 0; // put the point into origin
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end
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else begin // put it on triangle's edge
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k := random;
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if (random(2) = 1) then
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begin
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x := k * Cx + random(2)*(1 - k);
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y := k * Cy;
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end else
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begin
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x := random(2)* k;
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y := 0;
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end;
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end;
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end;
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FTx^ := vvar * x + Ax;
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FTy^ := vvar * y - Ay;
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end;
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procedure TVariationTriangleCrop.CalcFunction;
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var x, y, k: double;
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begin
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x := FTx^ - Ax;
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y := FTy^ + Ay;
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if not IsP_Inside(Cx, Cy, x, y) then
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begin
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if (zero = 1) then
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begin
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x := 0; y := 0; // put the point into origin
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end
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else begin // put it on triangle's edge
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k := random;
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if (random(2) = 1) then
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begin
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x := k * Cx + random(2)*(1 - k);
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y := k * Cy;
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end else
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begin
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x := random(2)* k;
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y := 0;
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end;
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end;
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end;
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FPx^ := FPx^ + vvar * x + Ax;
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FPy^ := FPy^ + vvar * y - Ay;
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end;
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procedure TVariationTriangleCrop.CalcPost;
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var x, y, k: double;
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begin
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x := FPx^ - Ax;
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y := FPy^ + Ay;
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if not IsP_Inside(Cx, Cy, x, y) then
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begin
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if (zero = 1) then
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begin
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x := 0; y := 0; // put the point into origin
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end
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else begin // put it on triangle's edge
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k := random;
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if (random(2) = 1) then
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begin
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x := k * Cx + random(2)*(1 - k);
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y := k * Cy;
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end else
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begin
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x := random(2)* k;
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y := 0;
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end;
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end;
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end;
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FPx^ := vvar * x + Ax;
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FPy^ := vvar * y - Ay;
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end;
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///////////////////////////////////////////////////////////////////////////////
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constructor TVariationTriangleCrop.Create;
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begin
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alpha := 60;
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beta := 60;
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mode := 1;
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zero := 0;
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Ax := 0;
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Ay := 0;
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end;
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///////////////////////////////////////////////////////////////////////////////
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class function TVariationTriangleCrop.GetInstance: TBaseVariation;
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begin
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Result := TVariationTriangleCrop.Create;
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end;
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///////////////////////////////////////////////////////////////////////////////
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class function TVariationTriangleCrop.GetName: string;
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begin
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Result := 'trianglecrop';
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end;
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///////////////////////////////////////////////////////////////////////////////
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function TVariationTriangleCrop.GetVariableNameAt(const Index: integer): string;
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begin
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case Index Of
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0: Result := 'trianglecrop_alpha';
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1: Result := 'trianglecrop_beta';
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2: Result := 'trianglecrop_Ax';
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3: Result := 'trianglecrop_Ay';
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4: Result := 'trianglecrop_zero_edges';
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5: Result := 'trianglecrop_mode';
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else
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Result := '';
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end
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end;
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///////////////////////////////////////////////////////////////////////////////
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function TVariationTriangleCrop.SetVariable(const Name: string; var value: double): boolean;
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begin
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Result := False;
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if Name = 'trianglecrop_alpha' then begin
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if (value < 1) then Value := 1;
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if (value > (179 - beta)) then Value := 179 - beta;
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alpha := Value;
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Result := True;
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end else if Name = 'trianglecrop_beta' then begin
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if (value < 1) then Value := 1;
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if (value > (179 - alpha)) then Value := 179 - alpha;
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beta := Value;
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Result := True;
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end
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else if Name = 'trianglecrop_mode' then begin
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if (value < 0) then Value := 0;
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if (value > 2) then Value := 2;
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mode := Round(Value);
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Result := True;
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end
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else if Name = 'trianglecrop_zero_edges' then begin
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if (value < 0) then Value := 0;
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if (value > 1) then Value := 1;
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zero := Round(Value);
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Result := True;
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end
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else if Name = 'trianglecrop_Ax' then begin
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Ax := Value;
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Result := True;
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end
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else if Name = 'trianglecrop_Ay' then begin
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Ay := Value;
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Result := True;
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end;
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end;
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function TVariationTriangleCrop.ResetVariable(const Name: string): boolean;
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begin
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Result := False;
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if Name = 'trianglecrop_alpha' then
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begin
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alpha:= 60;
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Result := True;
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end else if Name = 'trianglecrop_beta' then
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begin
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beta := 60;
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Result := True;
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end else if Name = 'trianglecrop_mode' then
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begin
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mode := 1;
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Result := True;
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end else if Name = 'trianglecrop_zero_edges' then
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begin
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zero := IfThen(zero = 1, 0, 1);
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Result := True;
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end
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else if Name = 'trianglecrop_Ax' then begin
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Ax := 0;
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Result := True;
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end
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else if Name = 'trianglecrop_Ay' then begin
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Ay := 0;
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Result := True;
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end;
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end;
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///////////////////////////////////////////////////////////////////////////////
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function TVariationTriangleCrop.GetNrVariables: integer;
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begin
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Result := 6;
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end;
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///////////////////////////////////////////////////////////////////////////////
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function TVariationTriangleCrop.GetVariable(const Name: string; var value: double): boolean;
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begin
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Result := False;
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if Name = 'trianglecrop_alpha' then begin
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Value := alpha;
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Result := True;
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end else if Name = 'trianglecrop_beta' then begin
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Value := beta;
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Result := True;
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end else if Name = 'trianglecrop_mode' then begin
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Value := mode;
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Result := True;
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end else if Name = 'trianglecrop_zero_edges' then begin
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Value := zero;
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Result := True;
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end
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else if Name = 'trianglecrop_Ax' then begin
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Value := Ax;
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Result := True;
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end
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else if Name = 'trianglecrop_Ay' then begin
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Value := Ay;
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Result := True;
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end;
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end;
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///////////////////////////////////////////////////////////////////////////////
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initialization
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RegisterVariation(TVariationClassLoader.Create(TVariationTriangleCrop), false, false);
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end.
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