java3d加载外部模型,实现在Java 3D中载入外部3D模型文件方法详解(2)

76.

77. public void setWindowMode()

78. {

79. frame = new JFrame();

80. frame.setResizable(false);//禁止窗体改变大小

81. frame.setPreferredSize(new Dimension(scrWidth,scrHeight));

82. frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);//响应窗体的关闭事件，但不关闭窗体

83. frame.setVisible(true);

84.// 侦听窗体事件并捕获窗体关闭中的事件，在用户确认后退出程序

85. frame.addWindowListener(new WindowAdapter(){

86. public void windowClosing(WindowEvent e)

87. {

88. int res = JOptionPane.showConfirmDialog(null, "是否退出！","退出",JOptionPane.YES_NO_OPTION);

89. if(res == JOptionPane.YES_OPTION)

90. closeFrame();

91. }

92. });

93. this.setFrametoCenter();

94. }

95.

96. public void setFullWindowMode()

97. {

98. if(frame != null)

99. {

100. device = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();

101. DisplayMode displayMode = device.getDisplayMode();

102. frame.setPreferredSize(new Dimension(displayMode.getWidth(),displayMode.getHeight()));

103. }

104. }

105.

106. public int getWidth()

107. {

108. return scrWidth;

109. }

110.

111. public int getHeight()

112. {

113. return scrHeight;

114. }

115.

116. public JFrame getFrame()

117. {

118. return frame;

119. }

120.

121.// 将窗体在显示屏幕内居中显示

122. public void setFrametoCenter()

123. {

124. if(device!=null)

125. return;

126. Insets inset = frame.getInsets();

127. int scrx=0;

128. int scry=0;

129. Dimension scrSize = Toolkit.getDefaultToolkit().getScreenSize();

130. if(scrSize.width > scrWidth)

131. scrx = (scrSize.width-scrWidth)/2;

132. if(scrSize.height > scrHeight)

133. scry = (scrSize.height-scrHeight)/2;

134. frame.setBounds(scrx-inset.left, scry-inset.top, scrWidth+inset.right+inset.left, scrHeight+inset.bottom+inset.top);

135. }

136.

137.// 关闭窗体事件

138. public void closeFrame()

139. {

140. frame.dispose();

141. System.exit(0);

142. }

143.}

LoadModelDemo.java

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01.import java.awt.BorderLayout;

02.import java.awt.Dimension;

03.import java.awt.Font;

04.import java.awt.GraphicsConfiguration;

05.import java.io.FileNotFoundException;

06.import java.util.Enumeration;

07.

08.import javax.media.j3d.Background;

09.import javax.media.j3d.BoundingBox;

10.import javax.media.j3d.BoundingSphere;

11.import javax.media.j3d.BranchGroup;

12.import javax.media.j3d.Canvas3D;

13.import javax.media.j3d.Transform3D;

14.import javax.media.j3d.TransformGroup;

15.import javax.swing.JPanel;

16.import javax.vecmath.Color3f;

17.import javax.vecmath.Point3d;

18.import javax.vecmath.Vector3d;

19.import javax.vecmath.Vector3f;

20.

21.import com.sun.j3d.loaders.IncorrectFormatException;

22.import com.sun.j3d.loaders.ParsingErrorException;

23.import com.sun.j3d.loaders.Scene;

24.import com.sun.j3d.loaders.objectfile.ObjectFile;

25.import com.sun.j3d.utils.behaviors.vp.OrbitBehavior;

26.import com.sun.j3d.utils.geometry.Text2D;

27.import com.sun.j3d.utils.universe.SimpleUniverse;

28.import com.sun.j3d.utils.universe.ViewingPlatform;

29.

30.

31.public class LoadModelDemo extends JPanel{

32.

33. private BranchGroup sceneBG;

34. private SimpleUniverse universe;

35. private BoundingSphere bounds;

36. private double boundRadius = 100;

37.

38. public LoadModelDemo(int width,int height)

39. {

40. this.setLayout(new BorderLayout());

41. GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();

42. Canvas3D canvas = new Canvas3D(config);

43. canvas.setSize(width, height);

44. this.add(canvas,BorderLayout.CENTER);

45.

46. universe = new SimpleUniverse(canvas);

47. createSceneGroup();

48. initUserPosition();

49. orbitControls(canvas);

50. universe.addBranchGraph(sceneBG);

51. }

52.

53. public void createSceneGroup()

54. {

55. sceneBG = new BranchGroup();

56. bounds = new BoundingSphere(new Point3d(0,0,0),boundRadius);

57. addBackground();

58. TransformGroup[] objModel = new TransformGroup[4];

59. sceneBG.addChild(objModel[0] = loadModel("leet/Liit.obj",ObjectFile.RESIZE,new Vector3d(-5.4,0,0)));

60. sceneBG.addChild(objModel[1] = loadModel("leet/Liit.obj",ObjectFile.REVERSE,new Vector3d(-1.8,0,0)));

61. sceneBG.addChild(objModel[2] = loadModel("leet/Liit.obj",ObjectFile.TRIANGULATE,new Vector3d(1.8,0,0)));

62. sceneBG.addChild(objModel[3] = loadModel("leet/Liit.obj",ObjectFile.STRIPIFY,new Vector3d(5.4,0,0)));

63. sceneBG.addChild(new CheckerFloor().getBG());

64. //对sceneBG有关的对象进行编译和缓存，如果在编译之后再次添加其它分支的话将抛异常

65. sceneBG.compile();

66. }

67.

68. public void addBackground()

69. {

70. Background back = new Background();

71. back.setApplicationBounds(bounds);

72. back.setColor(0.17f, 0.62f, 0.92f);

73. sceneBG.addChild(back);

74. }

75.

76. private void initUserPosition()

77. {

78. //返回当前虚拟世界的观察平台

79. ViewingPlatform vp = universe.getViewingPlatform();

80. //得到观察平台的坐标枝花点

81. TransformGroup steerTG = vp.getViewPlatformTransform();

82. Transform3D t3d = new Transform3D();

83. steerTG.getTransform(t3d);

84. //设置观察点坐标在(0,5,20)，看向坐标(0,0,0)处，指定Y轴向正数沿伸方向为正方向

85. t3d.lookAt(new Point3d(0,5,20), new Point3d(0,0,0), new Vector3d(0,1,0));

86. t3d.invert();

87. steerTG.setTransform(t3d);

88. }

89.

90. private void orbitControls(Canvas3D canvas)

91. {

92. OrbitBehavior orbit = new OrbitBehavior(canvas, OrbitBehavior.REVERSE_ALL);

93. orbit.setSchedulingBounds(bounds);

94. ViewingPlatform vp = universe.getViewingPlatform( );

95. vp.setViewPlatformBehavior(orbit);

96. }

97.

98. private TransformGroup loadModel(String filename,int flag,Vector3d translation)

99. {

100. Scene loadScene = this.loadFromFile(filename,flag);

101. Transform3D t3d = new Transform3D();

102. t3d = this.rotateModel();

103. t3d.setScale(this.calcScaleFactor(loadScene.getSceneGroup()));

104. t3d.setTranslation(translation);

105. TransformGroup tg = new TransformGroup(t3d);

106. tg.addChild(loadScene.getSceneGroup());

107. return tg;

108. }

109.

110. private Scene loadFromFile(String filename,int flag)

111. {

112. Scene loadScene = null;

113. ObjectFile obj = new ObjectFile(flag);

114. try {

115. loadScene = obj.load(this.getClass().getClassLoader().getResource(filename));

116. } catch (FileNotFoundException e) {

117. // TODO Auto-generated catch block

118. System.out.println("文件未找到或文件路径不正确");

119. e.printStackTrace();

120. } catch (IncorrectFormatException e) {

121. // TODO Auto-generated catch block

122. System.out.println("文件格式不正确");

123. e.printStackTrace();

124. } catch (ParsingErrorException e) {

125. // TODO Auto-generated catch block