Geometry Objects - Interactive Web-Based Virtual Reality with Java 3D - page 53

Figure 27. First code segment for DiamondTriangleStripArray.java

1. int vertex = 4; int stripVertexCount [] = {vertex};

2. public Diamond()

3. {

4. this.setGeometry(Strip1Geometry()); this.addGeometry(Strip2Geometry());

5. this.addGeometry(Strip3Geometry()); this.addGeometry(Strip4Geometry());

6. this.setAppearance(ColorAppearance());

7. }

8.
9. private Geometry Strip1Geometry() { //Top TriangleStrip 1
10. TriangleStripArray Triangle = new TriangleStripArray (vertex,
11. TriangleStripArray.COORDINATES , stripVertexCount);
12. Triangle.setCoordinate(0, new Point3f(0.0f,0.0f,0.5f));
13. Triangle.setCoordinate(1, new Point3f(0.0f,0.8f,0.0f));
14. Triangle.setCoordinate(2, new Point3f(0.5f,0.0f,0.0f));
15. Triangle.setCoordinate(3, new Point3f(0.0f,0.0f,-0.5f));
16. return Triangle; }
17.
18. private Geometry Strip2Geometry() { //Top TriangleStrip 2
19. TriangleStripArray Triangle2 = new TriangleStripArray (vertex,
20. TriangleStripArray.COORDINATES , stripVertexCount);
21. Triangle2.setCoordinate(0, new Point3f(0.0f,0.0f,-0.5f));
22. Triangle2.setCoordinate(1, new Point3f(-0.5f,0.0f,0.0f));
23. Triangle2.setCoordinate(2, new Point3f(0.0f,0.8f,0.0f));
24. Triangle2.setCoordinate(3, new Point3f(0.5f,0.0f,0.0f));
25. return Triangle2; }
26.
27. private Geometry Strip3Geometry() { //Bottom TriangleStrip 3
28. TriangleStripArray Triangle3 = new TriangleStripArray (vertex,
29. TriangleStripArray.COORDINATES , stripVertexCount);
30. Triangle3.setCoordinate(0, new Point3f(0.0f,0.0f,0.5f));
31. Triangle3.setCoordinate(3, new Point3f(0.5f,0.0f,0.0f));
32. Triangle3.setCoordinate(2, new Point3f(0.0f,-0.8f,0.0f));
33. Triangle3.setCoordinate(1, new Point3f(0.0f,0.0f,-0.5f));
34. return Triangle3; }

Figure 28. Second code segment and result for DiamondTriangleStripArray.java

35. private Geometry Strip4Geometry() { //Bottom TriangleStrip 4
36. TriangleStripArray Triangle4 = new TriangleStripArray (vertex,
37. TriangleStripArray.COORDINATES , stripVertexCount);
38. Triangle4.setCoordinate(0, new Point3f(0.0f,0.0f,-0.5f));
39. Triangle4.setCoordinate(1, new Point3f(-0.5f,0.0f,0.0f));
40. Triangle4.setCoordinate(2, new Point3f(0.0f,-0.8f,0.0f));

41. Triangle4.setCoordinate(3, new Point3f(0.0f,0.0f,0.5f));

42. return Triangle4; }