The Line class Example 23.21: The Line class Example 23.21 is a class that represents a line, or, more precisely, a line segment. The line is stored as two Point objects which represent it endpoints. Notice that the draw method uses the Point class's non-public fields x, y and z. This is permissible because the Line class and the Point class are in the same package, elharo.vrml. package elharo.vrml; public class Line extends shape { // a line is defined by two points Point p1; Point p2; public Line(Point p1, Point p2) { this.p1 = p1; this.p2 = p2; } public Line(double x1, double y1, double z1, double x2, double y2, double z2) { p1 = new Point(x1, y1, z1); p2 = new Point(x2, y2, z2); } public String draw() { String s1 = "Coordinate3 { point [ "; String s2 = p1.x + " " + p1.y + " " + p1.z + ",\n"; String s3 = p2.x + " " + p2.y + " " + p2.z + ",\n"; String s4 = "] }\n\n"; String s5 = "IndexedLineSet {\n coordIndex [ " + "0, 1\n] \n}"; return s1 + s2 + s3 + s4 + s5; } } Copyright 1996 Elliotte Rusty Harold [e-mail] This Chapter Examples Home