public class Point3D {
    float x, y, z, w = 1;

    public Point3D() {
    }

    public Point3D(float xval, float yval, float zval) {
        x = xval;
        y = yval;
        z = zval;
    }
    
    public Point3D(Point3D p) {
        copy(p);
    }
    
    public void copy(Point3D p) {
        x = p.x;
        y = p.y;
        z = p.z;
    }
    
    public float dot(Vertex3D vert) {
        // returns this * vert
        return (this.x*vert.x + this.y*vert.y + this.z*vert.z);
    }

    public String toString() {
        ///////////////////////////////////////////////////////////////
        // Pretty prints current Point3D to a string
        ///////////////////////////////////////////////////////////////
        String str;
        int i;
        String x_str = (new Float(x)).toString();
        String y_str = (new Float(y)).toString();
        String z_str = (new Float(z)).toString();
        String w_str = (new Float(w)).toString();

        int col_max = x_str.length();
        int num = y_str.length();
        if ( num > col_max )
            col_max = num;
        num = z_str.length();
        if ( num > col_max )
            col_max = num;
        
        str = "+-";
        for (i = 1; i<=col_max; i++) {
            str += " ";
        }
        str += "-+\n";
        
        str += "| ";
        for (i = x_str.length(); i < col_max; i++) {
          str += " ";
        }
        str += x_str;
        str += " |\n";
        
        str += "| ";
        for (i = y_str.length(); i < col_max; i++) {
          str += " ";
        }
        str += y_str;
        str += " |\n";

        str += "| ";
        for (i = z_str.length(); i < col_max; i++) {
          str += " ";
        }
        str += z_str;
        str += " |\n";
        
        str += "| ";
        for (i = w_str.length(); i < col_max; i++) {
          str += " ";
        }
        str += w_str;
        str += " |\n";

        str += "+-";
        for (i = 1; i<=col_max; i++) {
            str += " ";
        }
        str += "-+";
        
        return str;
    }
    
    public String[] toString2() {
        ///////////////////////////////////////////////////////////////
        // Pretty prints current Point3D to an array
        // of strings, a string for each row of the matrix
        ///////////////////////////////////////////////////////////////
        String str[] = new String[6];
        int i;
        String x_str = (new Float(x)).toString();
        String y_str = (new Float(y)).toString();
        String z_str = (new Float(z)).toString();
        String w_str = (new Float(w)).toString();

        int col_max = x_str.length();
        int num = y_str.length();
        if ( num > col_max )
            col_max = num;
        num = z_str.length();
        if ( num > col_max )
            col_max = num;
        
        str[0] = "+-";
        for (i = 1; i<=col_max; i++) {
            str[0] += " ";
        }
        str[0] += "-+";
        str[5] = str[0];
        
        str[1] = "| ";
        for (i = x_str.length(); i < col_max; i++) {
          str[1] += " ";
        }
        str[1] += x_str;
        str[1] += " |";
        
        str[2] = "| ";
        for (i = y_str.length(); i < col_max; i++) {
          str[2] += " ";
        }
        str[2] += y_str;
        str[2] += " |";

        str[3] = "| ";
        for (i = z_str.length(); i < col_max; i++) {
          str[3] += " ";
        }
        str[3] += z_str;
        str[3] += " |";
        
        str[4] = "| ";
        for (i = w_str.length(); i < col_max; i++) {
          str[4] += " ";
        }
        str[4] += w_str;
        str[4] += " |";
        
        return str;
    }


}