The triangle is stored as three Point objects. As in the Line class, the draw method uses the Point's non-public fields x, y and z. This is permissible because the Triangle class and the Point class are in the same package, elharo.vrml.

```
package elharo.vrml;
public class Triangle extends shape {
// a triangle is defined by three points
Point p1;
Point p2;
Point p3;
public Triangle(Point p1, Point p2, Point p3) {
this.p1 = p1;
this.p2 = p2;
this.p3 = p3;
}
public Triangle(double x1, double y1, double z1,
double x2, double y2, double z2,
double x3, double y3, double z3) {
p1 = new Point(x1, y1, z1);
p2 = new Point(x2, y2, z2);
p3 = new Point(x3, y3, z3);
}
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 = p3.x + " " + p3.y + " " + p3.z + ",\n";
String s5 = "] }\n\n";
String s6 = "IndexedFaceSet {\n coordIndex [ " +
"0, 1, 2\n] \n}";
return s1 + s2 + s3 + s4 + s5 + s6;
}
}
```

Copyright 1996 Elliotte Rusty Harold

elharo@sunsite.unc.edu

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