public class tramatY extends prematrix
{
public tramatY()
    {
	super();
    }

public void recalc(double t)
    {
	M[0][0] = 1;
	M[0][1] = 0;
	M[0][2] = 0;
	M[0][3] = 0;
	M[1][0] = 0;
	M[1][1] = 1;
	M[1][2] = 0;
	M[1][3] = t;
	M[2][0] = 0;
	M[2][1] = 0;
	M[2][2] = 1;
	M[2][3] = 0;
	M[3][0] = 0;
	M[3][1] = 0;
	M[3][2] = 0;
	M[3][3] = 1;
    }
}