Appearance Objects - Interactive Web-Based Virtual Reality with Java 3D - page 80

Figure 7. Additional code segment PointAttributesExample2.java and result

25.

26. public BranchGroup createSceneGraph() {

27. BranchGroup objRoot = new BranchGroup();

28. // add more point here with different coordinates and point width

29. objRoot.addChild(new aPoint(0.3f, 0.4f, 0.0f, 4f));

30. objRoot.addChild(new aPoint(0.4f, -0.3f, 0.0f, 8f));

31. objRoot.addChild(new aPoint(-0.2f, 0.6f, 0.0f, 20f));

32.

33. //add more code here

34. Appearance sphereApp = new Appearance();

35. PolygonAttributes polygonAtt = new PolygonAttributes();

36. polygonAtt.setPolygonMode(PolygonAttributes.POLYGON_LINE);

37. sphereApp.setPolygonAttributes(polygonAtt);

38. objRoot.addChild(new Sphere(0.4f, sphereApp));

39. //end adding new code

40.

41. objRoot.compile();

42. return objRoot;

43. }

Figure 8. First segment of LineAttributesExample1.java

1. public class aLine extends Shape3D {

2.
3. public aLine(float x1, float y1, float x2, float y2, float width, int pattern, boolean antialias) {
4.

this.setGeometry(createLine(x1, y1, x2, y2));

5. this.setAppearance(createLineApp(width, pattern, antialias));

6. }
7.
8. private Geometry createLine(float x1, float y1, float x2, float y2) {
9. LineArray line = new LineArray(2, GeometryArray.COORDINATES);

10. line.setCoordinate(0, new Point3f(x1, y1, 0.0f));

11. line.setCoordinate(1, new Point3f(x2, y2, 0.0f));

12. return line;

13. }
14.
15. private Appearance createLineApp(float width, int pattern, boolean antialias) {
16. Appearance app = new Appearance();

17. // create a LineAttributes

18. // and LineWidth = width, LinePattern = pattern, antialiasing = antialias

19. LineAttributes lineAtt = new LineAttributes(width, pattern, antialias);

20. app.setLineAttributes(lineAtt);

21. return app;

22. }
23.
24. }