Appearance Objects - Interactive Web-Based Virtual Reality with Java 3D - page 85

Figure 14. Code segment and result of PolygonAttributesExample2.java

1. public class AppearancePOLYGON_POINT extends Applet

2. {
3. public class Letter_E extends Shape3D
4. {
5. int vertex = 4;

6. //constructor

7. public Letter_E()

8. {

9. this.setGeometry(Quad1Geometry());

10. this.addGeometry(Quad2Geometry());

11. this.addGeometry(Quad3Geometry());

12. this.addGeometry(Quad4Geometry());

13. this.setAppearance(Letter_E_Appearance());

14. }
15. private Appearance Letter_E_Appearance()
16. {
17. Appearance look = new Appearance();

18. PolygonAttributes polyAttrib = new PolygonAttributes();

19. //use only the vertices to render the object

20. polyAttrib.setPolygonMode(PolygonAttributes.POLYGON_POINT);

21. //to make both sides of the face appear

22. polyAttrib.setCullFace(PolygonAttributes.CULL_NONE);

23. look.setPolygonAttributes(polyAttrib);

24. return look;

25. }

Figure 15. Results from PolygonAttributesExample2.java after changing POLYGON_POINT
to POLYGON_LINE (left) and POLYGON_FILL (right)