Textures - Interactive Web-Based Virtual Reality with Java 3D - page 107

Figure 11. Code segment and result for MultiLevel.java

1. Appearance createAppearance() {

2. int imageWidth, imageHeight, imageLevel; final int SMALLEST = 1;

3. String filename = "color256.gif"; System.out.println("loading image: "+filename);

4.

5. Appearance appear = new Appearance();

6. System.out.println("loading image: "+filename);

7. TextureLoader loader = new TextureLoader(filename, this);

8. ImageComponent2D image = loader.getImage();

9. if(image == null) System.out.println("load failed for texture: "+filename);

10.
11. imageWidth = image.getWidth(); imageHeight = image.getHeight();

12. Texture2D texture = new Texture2D(Texture.MULTI_LEVEL_MIPMAP, Texture.RGBA,

13. imageWidth, imageHeight);

14.
15. imageLevel = 0;

16. System.out.println("set image level: "+imageLevel+" width: "+imageWidth+" height:”+imageHeight);

17. texture.setImage(imageLevel, image);

18.
19. while (imageWidth > SMALLEST || imageHeight > SMALLEST) {

20. imageLevel++;

21. if (imageWidth > SMALLEST) imageWidth /= 2;

22. if (imageHeight > SMALLEST) imageHeight /= 2;

23. System.out.print("load image level: "+imageLevel+" width: "+imageWidth

24. +" height: "+imageHeight+" :: ");

25. filename = "color"+imageWidth+".gif"; System.out.print(filename + " ... ");

26. loader = new TextureLoader(filename, this);

27. image = loader.getImage(); System.out.println("set image");

28. texture.setImage(imageLevel, image); }

29.
30. texture.setMagFilter(Texture.MULTI_LEVEL_POINT);

31. texture.setMinFilter(Texture.MULTI_LEVEL_POINT);

32.
33. appear.setTexture(texture);

34. return appear; }

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