Implementation

{$R *.dfm}

Procedure FonDraw;

Begin

Form1.Image1.Canvas.FillRect(Rect(0,0,Form1.Image1.Width,Form1.Image1.Height));

End;

Procedure DrawAxes;

Begin

k:=Form1.TrackBar1.Position;

Form1.Image1.Canvas.Pen.Color:=colAx;

Form1.Image1.Canvas.MoveTo(0,Trunc(Form1.Image1.Height/2));

Form1.Image1.Canvas.LineTo(Form1.Image1.Width,Trunc(Form1.Image1.Height/2));

Form1.Image1.Canvas.MoveTo(Trunc(Form1.Image1.Width/2),0);

Form1.Image1.Canvas.LineTo(Trunc(Form1.Image1.Width/2),Form1.Image1.Height);

Form1.Image1.Canvas.Pen.Color:=clSilver;

x:=Trunc(Form1.Image1.Width/2);

while x<Form1.Image1.Width do

Begin

x:=x+k;

Form1.Image1.Canvas.MoveTo(x,0);

Form1.Image1.Canvas.LineTo(x,Form1.Image1.Height);

End;

x:=Trunc(Form1.Image1.Width/2);

while x>0 do

Begin

x:=x-k;

Form1.Image1.Canvas.MoveTo(x,0);

Form1.Image1.Canvas.LineTo(x,Form1.Image1.Height);

End;

y:=Trunc(Form1.Image1.Height/2);

while y<Form1.Image1.Height do

Begin

y:=y+k;

Form1.Image1.Canvas.MoveTo(0,y);

Form1.Image1.Canvas.LineTo(Form1.Image1.Width,y);

End;

y:=Trunc(Form1.Image1.Height/2);

while y>0 do

Begin

y:=y-k;

Form1.Image1.Canvas.MoveTo(0,y);

Form1.Image1.Canvas.LineTo(Form1.Image1.Width,y);

End;

End;

Function fy1(fx:integer):real;

Begin

fy1:=(sqr(fx)-1)/(sqr(sqr(fx))+1)

End;

Function fy2(fx:integer):real;

Begin

fy2:=-sqr(sqr(fx))*fx+2*sqr(fx)*fx-1;

End;

Function fy1D(fxD:real):real;

Begin

fy1D:=(sqr(fxD)-1)/(sqr(sqr(fxD))+1)

End;

Function fy2D(fxD:real):real;

Begin

fy2D:=-sqr(sqr(fxD))*fxD+2*sqr(fxD)*fxD-1;

End;

Procedure Grafic(pg:integer);

Begin

if pg=1 then

Begin

FonDraw;

DrawAxes

End

else if pg=2 then

Begin

Form1.Image1.Canvas.Pen.Color:=colGr1;

rx:=0;

ry:=Trunc(fy1(rx));

x:=Trunc(Form1.Image1.Width/2)+k*rx;

y:=Trunc(Form1.Image1.Height/2)-k*ry;

Form1.Image1.Canvas.MoveTo(x,y);

while x<Form1.Image1.Width do

Begin

rx:=rx+1;

ry:=Trunc(fy1(rx));

x:=Trunc(Form1.Image1.Width/2)+k*rx;

y:=Trunc(Form1.Image1.Height/2)-k*ry;

Form1.Image1.Canvas.LineTo(x,y);

End;

rx:=0;

ry:=Trunc(fy1(rx));

x:=Trunc(Form1.Image1.Width/2)+k*rx;

y:=Trunc(Form1.Image1.Height/2)-k*ry;

Form1.Image1.Canvas.MoveTo(x,y);

while x>0 do

Begin

rx:=rx-1;

ry:=Trunc(fy1(rx));

x:=Trunc(Form1.Image1.Width/2)+k*rx;

y:=Trunc(Form1.Image1.Height/2)-k*ry;

Form1.Image1.Canvas.LineTo(x,y);

End

End

else if pg=3 then

Begin

Form1.Image1.Canvas.Pen.Color:=colGr2;

rx:=0;

ry:=Trunc(fy2(rx));

x:=Trunc(Form1.Image1.Width/2)+k*rx;

y:=Trunc(Form1.Image1.Height/2)-k*ry;

Form1.Image1.Canvas.MoveTo(x,y);

while x<Form1.Image1.Width do

Begin

rx:=rx+1;

ry:=Trunc(fy2(rx));

x:=Trunc(Form1.Image1.Width/2)+k*rx;

y:=Trunc(Form1.Image1.Height/2)-k*ry;

Form1.Image1.Canvas.LineTo(x,y);

End;

rx:=0;

ry:=Trunc(fy2(rx));

x:=Trunc(Form1.Image1.Width/2)+k*rx;

y:=Trunc(Form1.Image1.Height/2)-k*ry;

Form1.Image1.Canvas.MoveTo(x,y);

while x>0 do

Begin

rx:=rx-1;

ry:=Trunc(fy2(rx));

x:=Trunc(Form1.Image1.Width/2)+k*rx;

y:=Trunc(Form1.Image1.Height/2)-k*ry;

Form1.Image1.Canvas.LineTo(x,y);

End

End

End;

Procedure func;

Begin

if Form1.RadioButton1.Checked then f:=1

else if Form1.RadioButton2.Checked then f:=2

else if Form1.RadioButton3.Checked then f:=3

else if Form1.RadioButton4.Checked then f:=4;

Case f of

Grafic(1);

Grafic(2);

Grafic(3);

Begin

Grafic(2);

Grafic(3)

End

End;

End;

Procedure GraficD(pgD:integer);

Var dx,dy,krok:real;

Begin

if pgD=2 then

Begin

Form1.Image1.Canvas.Pen.Color:=colGr1;

krok:=1/(10*kd);

dx:=0;

x:=Trunc(Form1.Image1.Width/2);

dy:=fy1D(dx);

y:=Trunc(Form1.Image1.Height/2-dy*(kd*10));

Form1.Image1.Canvas.MoveTo(x,y);

while x<Form1.Image1.Width do

Begin

dx:=dx+krok;

x:=x+1;

dy:=fy1D(dx);

y:=Trunc(Form1.Image1.Height/2-dy*(kd*10));

Form1.Image1.Canvas.LineTo(x,y);

End;

dx:=0;

x:=Trunc(Form1.Image1.Width/2);

dy:=fy1D(dx);

y:=Trunc(Form1.Image1.Height/2-dy*(kd*10));

Form1.Image1.Canvas.MoveTo(x,y);

while x>0 do

Begin

dx:=dx-krok;

x:=x-1;

dy:=fy1D(dx);

y:=Trunc(Form1.Image1.Height/2-dy*(kd*10));

Дата добавления: 2015-10-30