/**
 Class for triangles to be drawn on the screen. For this class,
 a triangle points up and is completely determined by the size of
 its base. (Screen character spacing determines the length of the
 sides, given the base.)
 Inherits getOffset, setOffset, and drawAt from the class Figure.
*/
public class Triangle extends Figure
{
    private int base;

    public Triangle( )
    {
        super( );
        base = 0;
    }

    public Triangle(int theOffset, int theBase)
    {
        super(theOffset);
        base = theBase;
    }

    public void reset(int newOffset, int newBase)
    {
        setOffset(newOffset);
        base = newBase;
    }

    /**
     Draws the figure at current line.
   */
    public void drawHere( )
    {
        drawTop( );
        drawBase( );
    }

    private void drawBase( )
    {
        spaces(getOffset( ));
        int count;
        for (count = 0; count < base; count++)
             System.out.print('*');
         System.out.println( );
    }

    private void drawTop( )
    {
        //startOfLine will be the number of spaces to the
        //first '*' on a line. Initially set to the number
        //of spaces before the top '*'.
        int startOfLine = getOffset( ) + (base/2);
         spaces(startOfLine);
         System.out.println('*');//top '*'
        int count;
        int lineCount = (base/2) - 1;//height above base
        //insideWidth == number of spaces between the
        //two '*'s on a line.
        int insideWidth = 1;
        for (count = 0; count < lineCount; count++)
        {
           //Down one line, so the first '*' is one more
           //space to the left.
            startOfLine--;
            spaces(startOfLine);
            System.out.print('*');
            spaces(insideWidth);
            System.out.println('*');
           //Down one line, so the inside is 2 spaces wider.
            insideWidth = insideWidth + 2;
        }
    }

    private static void spaces(int number)
    {
        int count;
        for (count = 0; count < number; count++)
            System.out.print(' ');
    }
}