虚拟现实vrml script 语法介绍

翔羽 · 发表于 2006-4-24 08:43:08

Java代码iport java.awt.*; import java.applet.*; import vrml.external.Browser; import vrml.external.Node; import vrml.external.field.EventInSFVec3f; import vrml.external.field.EventOutSFVec3f;public class eai_test extends java.applet.Applet implements Runnable{     Browser browser;     Node ball;     Node Timer;     Button btn_click;     int appletSize[]={100,125};//width and height     float scaleOfBall[]={1,1};     boolean isBig;     Thread clockThread =null;    public void run(){         while(true){             repaint();             try{                 scaleOfBall[0]=(                     ((EventOutSFVec3f)                    (ball.getEventOut("scale_changed"))).getValue()                 )[0];                 scaleOfBall[1]=scaleOfBall[0];             }             catch(Exception e){}             try{Thread.sleep(100);}             catch(InterruptedException e){}         }     }     public void start(){         if(clockThread ==null){             clockThread =new Thread(this);             clockThread.start();         }         browser=Browser.getBrowser(this);         ball=(Node)(browser.getNode("BALL"));     }     public void paint(Graphics g){         g.setColor(Color.green);         g.fillRect(0,0,appletSize[0],appletSize[1]);         g.setColor(Color.red);         int x,y,radius; //Ball of Applet        int centerX=(int)(appletSize[0]/2.0);         int centerY=(int)(appletSize[0]/2.0);        radius=(int)(scaleOfBall[0]*appletSize[0]/3.0);         x=(int)(centerX-radius);y=(int)(centerY-radius);         g.fillOval(x,y,2*radius,2*radius);     }     public void stop(){         try{             clockThread.stop();             clockThread = null;         }catch (Exception e){}     }     public void init() {         super.init();         setLayout(null);         resize(appletSize[0],appletSize[1]);         btn_click=new Button("Make Ball Large");         add(btn_click);         btn_click.reshape(0,100,100,25);     }    public boolean handleEvent(Event event) {         if (event.id == Event.ACTION_EVENT && event.target == btn_click) {                 clickedBtnClick();                 return true;         }         return super.handleEvent(event);     }     public void clickedBtnClick() {         EventInSFVec3f scale=             (EventInSFVec3f)ball.getEventIn("set_scale");         float value[]=new float[3];     public void clickedBtnClick() {         EventInSFVec3f scale=             (EventInSFVec3f)ball.getEventIn("set_scale");         float value[]=new float[3];         if(isBig){             for(int i=0;i<3;i++) value=1;             btn_click.setLabel("Make Ball Large");         }         else{             for(int i=0;i<3;i++) value=1.5f;             btn_click.setLabel("Make Ball Small");         }         scale.setValue(value);         isBig=!isBig;     } } ????

翔羽 · 发表于 2006-4-24 08:43:18

VRML代码#VRML V2.0 utf8 DEF BALL Transform{     children [     Shape{         appearance Appearance{ material Material{                 diffuseColor 1 0 0                 shininess .8         }         }         geometry Sphere{radius 0.5}     }     DEF SENSOR TouchSensor{}     ] } DEF POS PositionInterpolator{     key[0,0.25,0.5,0.75,1.0]     keyValue[1,1,1,1.3 1.3 1.3, 1.5 1.5 1.5              1.3 1.3 1.3 1   1   1 ] } DEF TIMER TimeSensor{ cycleInterval 1}ROUTE SENSOR.touchTime TO TIMER.startTime ROUTE TIMER.fraction_changed TO POS.set_fraction ROUTE POS.value_changed TO BALL.set_scale     Background {       groundAngle [ 0.9, 1.5, 1.57 ]       groundColor [  0 0.333 0, 0 0.4 0,  0 0.5 0, 0.62 0.67 0.60       ]       skyAngle [ 0.9, 1.5, 1.57 ]       skyColor [  0.21 0.18 0.66, 0.2 0.44 0.85,  0.51 0.81 0.95, 0.77 0.8 0.82       ]     } DEF INITVIEW Viewpoint{position 0 0 4  description "init_view"} vr.wrl #VRML V2.0 utf8 DEF MYMATERIAL Material{     diffuseColor 0 1 0     shininess 1 } DEF BALL Transform{     children  Shape{         appearance Appearance{             material USE MYMATERIAL         }             geometry Sphere{radius 0.3}     } }     Background {       groundAngle [ 0.9, 1.5, 1.57 ]       groundColor [  0 0.333 0, 0 0.4 0,  0 0.5 0, 0.62 0.67 0.60       ]       skyAngle [ 0.9, 1.5, 1.57 ]       skyColor [  0.21 0.18 0.66, 0.2 0.44 0.85,  0.51 0.81 0.95, 0.77 0.8 0.82       ]     }DEF INITVIEW Viewpoint{position 0 0 4  description "init_view"} Back to Top CtlVrml.java import java.awt.*; import java.applet.*; import vrml.external.Browser; import vrml.external.Node; import vrml.external.field.EventInSFColor;public class CtlVrml extends Applet {     Scrollbar scrBar[]=new Scrollbar[3];     Label labelColor[]=new Label[3];     Label labelDemo;     Browser browser;     Node myMaterial;     String Text[]={"R=","G=","B="};     boolean isScenceLoading=true  ;     public void start(){       while(isScenceLoading){         try{           browser=Browser.getBrowser(this);           myMaterial=(Node)(browser.getNode("MYMATERIAL"));           isScenceLoading=false;           labelDemo.setText("DemoLabel");         }         catch(Exception e){labelDemo.setText("VRML Loading");}       }     }     public void init() {         super.init();         setLayout(null);         resize(240,240);         setBackground(Color.green);         for(int i=0;i<3;i++){             scrBar=new Scrollbar(Scrollbar.HORIZONTAL);             add(scrBar);             scrBar.reshape(0,15+45*i,200,20);             scrBar.setValues(50,0,0,101);             labelColor=new Label(Text+scrBar.getValue(),Label.LEFT);             add(labelColor);             labelColor.setBackground(Color.green);            labelColor.reshape(200,15+45*i,40,20);         }         labelDemo=new Label("DemoLabel",Label.CENTER);         add(labelDemo);         labelDemo.reshape(90,160,60,60);         labelDemo.setBackground(new Color(122,122,122));     }    public boolean handleEvent(Event event) {         for(int i=0;i<3;i++){             if (event.id == Event.SCROLL_LINE_UP && event.target == scrBar) {                     setColorLabel(event,i);                     return true;             }             else             if (event.id == Event.SCROLL_LINE_DOWN && event.target == scrBar) {                     setColorLabel(event,i);                     return true;             }             else             if (event.id == Event.SCROLL_ABSOLUTE && event.target == scrBar) {                     setColorLabel(event,i);                     return true;             }         }         return super.handleEvent(event);     }    public void setColorLabel(Event ev,int i) {        Color demoColor;         labelColor.setText(Text+scrBar.getValue());         demoColor=new Color((int)(2.55*scrBar[0].getValue()),                             (int)(2.55*scrBar[1].getValue()),                             (int)(2.55*scrBar[2].getValue())                             );         labelDemo.setBackground(demoColor);         float value[]=new float[3];         EventInSFColor newColor=(EventInSFColor)myMaterial.getEventIn("set_diffuseColor");         for(i=0;i<3;i++)             value=(float)(scrBar.getValue()/100f);         newColor.setValue(value);    } }vr.wrlBack To Top#VRML V2.0 utf8 DEF BALL Transform{     children  Shape{         appearance Appearance{ material Material{                 diffuseColor 1 0 0                 shininess 1         }         }         geometry Sphere{radius 0.3}     } } DEF POS PositionInterpolator{     key[0,0.25,0.5,0.75,1.0]     keyValue[1 1 1, 2 2 2,4 4 4,2 2 2,1 1 1]} DEF TIMER TimeSensor{     loop TRUE     cycleInterval 8 } ROUTE TIMER.fraction_changed TO POS.set_fraction ROUTE POS.value_changed TO BALL.set_scale     Background {       groundAngle [ 0.9, 1.5, 1.57 ]       groundColor [  0 0.333 0, 0 0.4 0,  0 0.5 0, 0.62 0.67 0.60       ]       skyAngle [ 0.9, 1.5, 1.57 ]       skyColor [  0.21 0.18 0.66, 0.2 0.44 0.85,  0.51 0.81 0.95, 0.77 0.8 0.82       ]     }DEF INITVIEW Viewpoint{position 0 0 4  description "init_view"}

翔羽 · 发表于 2006-4-24 08:43:31

MyObserver.java Back To Topimport vrml.external.Browser; import vrml.external.Node; import vrml.external.field.*; import vrml.external.field.EventOutObserver; import java.awt.*;public class MyObserver implements EventOutObserver {     EventInSFVec3f scale;     float scaleOfBall;     Node ball;     public void init(Browser browse) {         ball = browse.getNode("BALL");     }     public void callback(EventOut event, double timeStamp, Object myLabel) {         scaleOfBall=(             ((EventOutSFVec3f)             (ball.getEventOut("scale_changed"))).getValue()             )[0];         ((Label)myLabel).setText(""+scaleOfBall);     } }--------------------------------------------------------------------------------Observer.java Back To Topimport java.awt.*; import java.applet.*; import vrml.external.Browser; import vrml.external.Node; import vrml.external.field.EventOutObserver;public class ScaleObserver extends Applet {     Browser browse;     Node sensor;     Label labelScale;     public void start(){         browse=Browser.getBrowser(this);         sensor = browse.getNode("BALL");         MyObserver observer = new MyObserver();         observer.init(browse);         sensor.getEventOut("set_scale").advise((EventOutObserver)observer, (Object)labelScale);     }     public void init() {         super.init();         setLayout(null);         resize(100,100);         labelScale=new Label("");         add(labelScale);         labelScale.reshape(0,0,100,20);     } }

翔羽 · 发表于 2006-4-24 08:44:55

该组帖子从网络上整理而得，有兴趣的朋友不妨阅读一下《VRML与Java编程技术》人民邮电出版社

翔羽 · 发表于 2006-4-24 08:47:52

关于编辑器，目前主要的vrml script 编辑器有：vrmlpad2.1版，需要的朋友留言后本人可上传到论坛。

小羽毛 · 发表于 2011-7-3 08:32:51

挺好啊

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