Delphi dicas

Efeito spray (timage)

{insira um TImage no form}



procedure Spray(Canvas: TCanvas; x, y, r: Integer; Color: TColor);

var

rad, a: Single;

i: Integer;

begin

        for i := 0 to 100 do

        begin

                a   := Random * 2 * pi;

                rad := Random * r;

                Canvas.Pixels[x + Round(rad * Cos(a)), y + Round(rad * Sin(a))] := Color;

        end;

end;



//propriedade do TImage

procedure TForm1.Image1MouseMove(Sender: TObject; Shift: TShiftState; X,

Y: Integer);

begin

        if ssLeft in Shift then Spray(Image1.Canvas, x, y, 40, clRed);

end;



//propriedade do TImage

procedure TForm1.Image1MouseDown(Sender: TObject; Button: TMouseButton;

Shift: TShiftState; X, Y: Integer);

begin

        if ssLeft in Shift then Spray(Image1.Canvas, x, y, 40, clRed);

end;

por : Felipe Monteiro