附錄AVRML參考節(jié)點(diǎn)

1、附錄A VRML參考節(jié)點(diǎn)VRML節(jié)點(diǎn)集包括基本幾何節(jié)點(diǎn)、復(fù)雜群節(jié)點(diǎn)、VRML場(chǎng)景效果節(jié)點(diǎn)、動(dòng)畫節(jié)點(diǎn)及動(dòng)態(tài)感知節(jié)點(diǎn)等。排序后的VRML節(jié)點(diǎn)集如下。1Anchor錨節(jié)點(diǎn)，是超級(jí)鏈接群節(jié)點(diǎn)，具有超級(jí)鏈接網(wǎng)絡(luò)文件和站點(diǎn)功能。Anchor錨節(jié)點(diǎn)的語(yǔ)法定義：節(jié)點(diǎn)名 域名和域值 域值類型 Anchor ur1 “” #exposeField MFString children #esposeFieldMFNode description “”#exposeFieldSFString parameter #exposeFiledMFString bboxCenter 0 0 0 #filedSFVec3fbb

2、oxSize -1 -1 1#filed SFVec3faddChildren #eventInMFNoderemoveChildren #eventInMFNode2Appearance外觀屬性節(jié)點(diǎn)，作為Shape節(jié)點(diǎn)指定材質(zhì)和紋理，這一節(jié)點(diǎn)是通過(guò)對(duì)它的域的控制來(lái)實(shí)現(xiàn)的。Appearance節(jié)點(diǎn)的語(yǔ)法定義：Appearancematerial NULL #exposedField SFNode外觀的材料節(jié)點(diǎn)texture NULL #exposedField SFNode紋理映像textureTransform NULL #exposedField SFNode紋理坐標(biāo)變換 3AudioCl

3、ip音響剪輯節(jié)點(diǎn)，不能單獨(dú)使用，要和Sound聲音節(jié)點(diǎn)一起使用。AudioClip音響剪輯節(jié)點(diǎn)的語(yǔ)法定義：AudioClip url#exposedField MFString description “” #exposedField SFString loop FALSE #exposedField SFBool pitch 1.0 #exposedField SFFloat startTime 0.0 #exposedField SFTime stopTime 0.0 #exposedField SFTime duration_changed #eventOut SFTime isActi

4、ve #eventOut SFBool4Background背景節(jié)點(diǎn)，是天空、大地及室內(nèi)立體空間背景節(jié)點(diǎn)。Background背景節(jié)點(diǎn)的語(yǔ)法定義：Background skyColor 0.0 0.0 0.0 #exposedField MFColorskyAngle #exposedField MFFloat groundColor 0.0 0.0 0.0 #exposedField MFColor groundAngle #exposedField MFFloat frontUrl #exposedField MFString backUrl #exposedField MFStringl

5、eftUrl #exposedField MFString rightUrl #exposedField MFStringtopUrl #exposedField MFString bottomUrl #exposedField MFString set_bind #eventIn SFBool isBound #eventOut SFBool5Billboard廣告牌節(jié)點(diǎn)，是廣告牌群節(jié)點(diǎn)。Billboard廣告牌節(jié)點(diǎn)的語(yǔ)法定義：Billboard axisOfRotation 0 1 0 # exposedField SFVec3fchildren # exposedField MFNode

6、bboxCenter 0 0 0 #field SFVec3fbboxSize -1 1 -1 #field SFVec3faddChildren #eventIn MFNoderemoveChildren # eventIn MFNode6Box 盒子節(jié)點(diǎn)，是基本幾何模型節(jié)點(diǎn)。Box盒子節(jié)點(diǎn)的語(yǔ)法定義： Box size 2.0 2.0 2.0 #field SFVec3f#定義了一個(gè)立方體的寬、高、深 7Collision碰撞節(jié)點(diǎn)，是碰撞傳感器節(jié)點(diǎn)。Collision碰撞傳感器節(jié)點(diǎn)的語(yǔ)法定義：Collision children #exposedField MFNode collide T

7、RUE #exposedField SFBoolproxy NULL#field SFNode bboxCenter 0.0 0.0 0.0#field SFVec3f bboxSize -1.0 1.0 1.0#field SFVec3f collideTime #eventOut SFTime addChildren#eventIn MFNode removeChildren#eventIn MFNode8Color顏色節(jié)點(diǎn)。Color顏色節(jié)點(diǎn)的語(yǔ)法定義：Color color #exposedFieldMFColor9ColorInterpolator顏色插補(bǔ)器節(jié)點(diǎn)，是控制顏色變換的動(dòng)態(tài)

8、節(jié)點(diǎn)。ColorInterpolator顏色插補(bǔ)器節(jié)點(diǎn)的語(yǔ)法定義： ColorInterpolator key #exposedField MFFloat keyValue #exposedField MFColor set_fraction #eventIn SFFloat value_changed #eventOut SFColor 10Cone圓錐體節(jié)點(diǎn)，是基本幾何模型節(jié)點(diǎn)。Cone圓錐體節(jié)點(diǎn)的語(yǔ)法定義：Cone bottomRadius 1.0#field SFFloat height 2.0#field SFFloatside TRUE #field SFBool bottom T

9、RUE #field SFBool 11CoordinateInterpolator坐標(biāo)插補(bǔ)器節(jié)點(diǎn)，是控制坐標(biāo)變換的動(dòng)態(tài)節(jié)點(diǎn)。CoordinateInterpolator坐標(biāo)插補(bǔ)器節(jié)點(diǎn)的語(yǔ)法定義：CoordinateInterpolator key #exposedField MFFloat keyValue #exposedField MFVec3f set-fraction #eventIn SFFloat value-changed #eventOut MFVec3f12CylinderSensor圓柱檢測(cè)器節(jié)點(diǎn)，是單軸旋轉(zhuǎn)型傳感器節(jié)點(diǎn)。CylinderSensor圓柱檢測(cè)器節(jié)點(diǎn)的語(yǔ)法定

10、義：CylinderSensor enabled TRUE#exposedField SFBool autoOffset TRUE#exposedField SFBooloffset 0#exposedField SFFloat maxAngle -1#exposedField SFFloat minAngle 0#exposedField SFFloat diskAngle 0.262#exposedField SFFloat isActive#eventOut SFBool trackPoint_changed#eventOut SFVec3f rotation_changed#event

11、Out SFRotation 13Cylinder圓柱體節(jié)點(diǎn)，是基本幾何模型節(jié)點(diǎn)。Cylinder圓柱體節(jié)點(diǎn)的語(yǔ)法定義：Cylinder radius 1.0 #field SFFloat圓柱體的半徑 height 2.0 #field SFFloat圓柱體的高top TRUE #field SFBool圓柱體的頂部 bottom TRUE #field SFBool圓柱體的底部 side TRUE #field SFBool圓柱體的曲面14DirectionalLight定向光源節(jié)點(diǎn)，是VRML場(chǎng)景效果節(jié)點(diǎn)。DirectionalLight定向光源節(jié)點(diǎn)的語(yǔ)法定義: DirectionalLi

12、ght ambientIntensity 0.0#exposedField SFFloatdirection 0 0 -1#exposedField SFVec3fcolor 1.0 1.0 1.0#exposedField SFColorintensity 1.0#exposedField SFFloat on TRUE#exposedField SFBool 15ElvationGrid海拔柵格節(jié)點(diǎn)，是創(chuàng)建復(fù)雜立體空間造型節(jié)點(diǎn)。ElevationGrid海拔柵格節(jié)點(diǎn)的語(yǔ)法定義：ElevationGrid xDimension 0#field SFInt32 xSpacing 0.0#fie

13、ld SFFlost zDimension 0#field SFInt32 zSpacing 0.0#field SFFloat height#field MFFloat color NULL#exposedField SFNode ColorPerVertex TRUE#field SFBool normal NULL#exposedField SFNode normalPerVertex TRUE #field SFBool texCoord NULL#exposedField SFNode ccw TRUE #field SFBool solid TRUE#field SFBool cr

14、easeAngle 0.0#field SFFloat set_height #eventIn MFFloat16EXTERNPROTO創(chuàng)建用戶外部定義的新節(jié)點(diǎn)。EXTERNPROTO創(chuàng)建用戶外部定義的新節(jié)點(diǎn)的語(yǔ)法定義：關(guān)鍵字 外部新節(jié)點(diǎn)名 EXTERNPROTO nodename#And any number of: 以下域或事件由用戶定義任意多個(gè)域或事件 域值類型 域或事件名 field fieldTypeName fieldName exposedField fieldTypeName fieldName eventIn eventInTypeName eventInName event

15、Out eventOutTypeName eventOutName“VRML外部文件名 #某新節(jié)點(diǎn)名”或url or urlList17Extrusion擠出造型節(jié)點(diǎn)，是VRML中最重要、最有用的節(jié)點(diǎn)。Extrusion擠出造型節(jié)點(diǎn)的語(yǔ)法定義： Extrusion crossSection #field MFVec2f1.0 1.0, 1.0 -1.0 -1.0 -1.0,-1.0 1.01.0 1.0 spine #field MFVec3f 0.0 0.0 0.0, 0.0 1.0 .0.0 scale 1.0 1.0 #field MFVec2f orientation 0.0 0.0

16、1.0 0.0 #field MFRotation beginCap TRUE #field SFBool endCap TRUE #field SFBool ccw TRUE #field SFBool solid TRUE #field SFBool convex TRUE #field SFBool creaseAngle 0.0 #field SFFloat set_spine #eventIn MFVec3f set_crossSection #eventIn MFVec2f set_scale #eventIn MFVec2f set_orientation #eventIn MF

17、Rotation 18Fog霧節(jié)點(diǎn)，用于空間大氣場(chǎng)景的一種自然現(xiàn)象的描繪。Fog霧化節(jié)點(diǎn)的語(yǔ)法定義：Fog color 1.0 1.0 1.0 #exposedFiled SFColor fogType “LINEAR” #exposedFiled SFFloat visibilityRange 0.0 #exposedFiled SFString set_bind # eventIn SFBool isBound # eventOut SFBool 19Group編組節(jié)點(diǎn)，是基本型群節(jié)點(diǎn)，可以組合基本幾何造型和復(fù)雜造型。Group編組節(jié)點(diǎn)的語(yǔ)法定義：Groupchildren #expose

18、dField MFNodebboxCenter 0.0.0.0.0.0#field SFVec3f bboxSize -1.0-1.0-1.0 #field SFVec3f addChildren #eventIn MFNode removeChildren #eventOut MFNode 20ImageTexture圖像紋理節(jié)點(diǎn)，是VRML立體空間造型外觀效果節(jié)點(diǎn)。ImageTexture圖像紋理節(jié)點(diǎn)的語(yǔ)法定義：節(jié)點(diǎn)名 域名和域值 域值類型 ImageTexture url #exposeField MFString repeatS TRUE#field SFBool repeaT TRU

19、E #field SFBool21IndexedLineSet“線”節(jié)點(diǎn)，是VRML復(fù)雜造型節(jié)點(diǎn)。IndexedLineSet線節(jié)點(diǎn)的語(yǔ)法定義：IndexedLineSet coord NULL#exposedField SFNode coordIndex #field MFInt32 color NULL#exposedField SFNode colorIndex #field MFInt32 colorPerVertex TURE #field SFBool set_coordIndex #eventIn MFInt32 set_colorIndex#eventIn MFInt32 22

20、IndexFaceSet“面”節(jié)點(diǎn)，屬于復(fù)雜造型節(jié)點(diǎn)范疇。IndexedFaceSet面節(jié)點(diǎn)的語(yǔ)法定義：IndexedFaceSet coord NULL #exposedField SFNodecoordIndex #fieldMFInt32texCoord NULL #exposedField SFNode texCoordIndex #fieldMFInt32color NULL#exposedField SFNodecolorIndex #field MFInt32colorPerVertex TRUE#fieldSFBoolnormal NULL #exposedField SFNo

21、denormalIndex #field MFInt32normalPerVertex TRUE #field SFBoolccw TRUE#field SFBoolconvex TRUE #field SFBoolsolid TRUE#fieldSFBoolcreaseAngle 0.0 #field SFFloatset_coordIndex#eventIn MFInt32set_texCoordIndex #eventIn MFInt32set_colorIndex#eventIn MFInt32set_normalIndex#eventIn MFInt3223Inline內(nèi)聯(lián)節(jié)點(diǎn)，是引

22、入型群節(jié)點(diǎn)。Inline內(nèi)聯(lián)節(jié)點(diǎn)的語(yǔ)法定義：Inline url “” #exposedField MFStringbboxCenter 0 0 0 #field SFVec3fbboxSize -1 1 1 # field SFVec3f 24LOD細(xì)節(jié)層次節(jié)點(diǎn)，是分級(jí)型群節(jié)點(diǎn)。LOD細(xì)節(jié)層次節(jié)點(diǎn)的語(yǔ)法定義：LOD level #exposedField MFNodecenter 0 0 0 #field SFVec3frange #field MFFloat25Material材料節(jié)點(diǎn)，作為Shape模型節(jié)點(diǎn)的子節(jié)點(diǎn)。Material材料節(jié)點(diǎn)的語(yǔ)法定義：MaterialdiffuseCol

23、or 0.8 0.8 0.8#exposedField SFColor材料的漫反射顏色ambientIntensify 0.2 #exposedField SFColor有多少環(huán)境光被該表面反射specularColor 0 0 0 #exposedField SFColor物體鏡面反射光線的顏色emissiveColor 0 0 0 #exposedField SFColor發(fā)光物體產(chǎn)生的光的顏色shininess 0.2#exposedField SFFloat造型外觀材料的亮度transparency 0#exposedField SFFloat物體的透明度 26MovieTexture

24、影像文件節(jié)點(diǎn)，是VRML的場(chǎng)景效果節(jié)點(diǎn)。MovieTexture影像文件節(jié)點(diǎn)的語(yǔ)法定義：MovieTexture url #exposedField MFString loop FALSE#exposedField SFBool speed 1.0#exposedField SFFloat startTime 0#exposedField SFTime stopTime 0#exposedField SFTime repeatS TURE#field SFBool repeatT TURE#field SFBool duration_changed #eventOut SFTime isAct

25、ive#eventOut SFBool 27NavigationInfor導(dǎo)航信息節(jié)點(diǎn)，是控制瀏覽者功能的節(jié)點(diǎn)。NavigationInfo導(dǎo)航信息節(jié)點(diǎn)的語(yǔ)法定義： 節(jié)點(diǎn)名 域和域值 域值類型 NavigationInfo avatarSize 0.25,1.6,0.75 #exposedField MFFLoat headlight TRUE#exposedField SFBlooltype “WALK”，“ANY” #exposedField MFStringspeed 1.0 #exposedField SFFloat visibilityLimit 0.0#exposedField S

26、FFloatset_bind#eventIn SFBool isBound #eventOut SFBool 28Normal法向量節(jié)點(diǎn)。Normal法向量節(jié)點(diǎn)的語(yǔ)法定義：Normal vector #exposedField MFFloat 29NormalInterpolator法線插補(bǔ)器節(jié)點(diǎn)，是控制向量變換的動(dòng)態(tài)節(jié)點(diǎn)。NormalInterpolator法線插補(bǔ)器節(jié)點(diǎn)的語(yǔ)法定義：NormalInterpolator key #exposedField MFFloat keyValue #exposedField MFVec3f set-fraction#eventIn SFFloat v

27、alue-changed#eventOut MFVec3f30OrientationInterpolator朝向插補(bǔ)器節(jié)點(diǎn)，是控制方位變換的動(dòng)態(tài)節(jié)點(diǎn)。OrientationInterpolator朝向插補(bǔ)器節(jié)點(diǎn)的語(yǔ)法定義：OrientationInterpolator key #exposedField MFFloat keyValue #exposedField MFVec3f set-fraction#eventIn SFFloat value-changed#eventOut MFVec3f31PlaneSensor平面檢測(cè)器節(jié)點(diǎn)，是平面移動(dòng)型傳感器節(jié)點(diǎn)。PlaneSensor平面檢測(cè)器

28、節(jié)點(diǎn)的語(yǔ)法定義：PlaneSensor enabled TRUE #exposedField SFBoolautoOffset TRUE #exposedField SFBooloffset 0 0 0#exposedField SFVec3fmaxPosition -1 1 #exposedField SFVec2fminPosition 0 0 #exposedField SFVec2f isActive #eventOut SFBool trackPoint_changed #eventOut SFVec3f translation_changed#eventOut SFVec3f 32

29、PointLight點(diǎn)光源節(jié)點(diǎn)，是VRML場(chǎng)景效果節(jié)點(diǎn)。PointLight 點(diǎn)光源節(jié)點(diǎn)的語(yǔ)法定義：PointLight location 0.0.0.0.0.0#exposedField SFVec3f radius 100.0#exposedField SFFloat intensity 1.0#exposedField SFFloat ambientIntensity 0.0 #exposedField SFFloat color 1.0 1.0 1.0#exposedField SFColorattenuation 1.0 0.0 0.0 #exposedField SFVec3fon

30、 TRUE#exposedField SFBool33PointSet“點(diǎn)”節(jié)點(diǎn)，是復(fù)雜造型節(jié)點(diǎn)。PointSet“點(diǎn)”節(jié)點(diǎn)的語(yǔ)法定義： “點(diǎn)”節(jié)點(diǎn)名 域名 域值 域值類型 PointSet color NULL #exposedField SFNode coord NULL #exposedField SFNode34PositionInterpolator位置插補(bǔ)器節(jié)點(diǎn)，是控制位置變換的動(dòng)態(tài)節(jié)點(diǎn)。PositionInterpolator位置插補(bǔ)器節(jié)點(diǎn)的語(yǔ)法定義：PositionInterpolator key #exposedField MFFloat keyValue #exposedF

31、ield MFVec3f set-fraction #eventIn SFFloat value-changed #eventOut SFVec3f 35PROTO創(chuàng)建用戶新節(jié)點(diǎn)，用戶根據(jù)軟件開發(fā)的需要設(shè)計(jì)自己的新節(jié)點(diǎn)。PROTO創(chuàng)建用戶新節(jié)點(diǎn)的語(yǔ)法定義：關(guān)鍵字 新節(jié)點(diǎn)名 PROTO nodename#And any number of: 以下域或事件由用戶定義任意多個(gè)域或事件 域值類型 域或事件名 域的初值 field fieldTypeName fieldName initialValue exposedField fieldTypeName fieldName initialValue

32、eventIn eventInTypeName eventInName eventOut eventOutTypeName eventOutName #新節(jié)點(diǎn)體 nodeBody #單個(gè)節(jié)點(diǎn)或組節(jié)點(diǎn) 36ProximtitySensor節(jié)點(diǎn)，是親近度傳感器節(jié)點(diǎn)。ProximitySensor節(jié)點(diǎn)的語(yǔ)法定義：ProximitySensor center 0 0 0#exposedField SFVec3f size 0 0 0#exposedField SFVec3f enabled TRUE#exposedField SFBool isActive#eventOut SFBool positi

33、on_changed#eventOut SFVec3f orientation_changed#eventOut SFRotation enterTime#eventOut SFTime exitTime#eventOut SFTime 37ScalarInterpolator標(biāo)量插補(bǔ)器節(jié)點(diǎn)，是控制變換強(qiáng)度的動(dòng)態(tài)節(jié)點(diǎn)。ScalarInterpolator標(biāo)量插補(bǔ)器節(jié)點(diǎn)的語(yǔ)法定義：ScalarInterpolatorkey #exposedField MFFloatkeyValue#exposedField MFFloat set-fraction #eventIn SFFloat value-

34、changed #eventOut SFFloat38Script腳本節(jié)點(diǎn)，是程序化的節(jié)點(diǎn)，是VRML接口程序。Script腳本節(jié)點(diǎn)的語(yǔ)法定義：節(jié)點(diǎn)名 域名 域值 域值類型 Script url #exposedField MFString directOutput FALSE#fieldSFBool mustEvaluate FALSE#fieldSFBool#And any number of: 以下域或事件由用戶定義任意多個(gè)域或事件 域或事件的類型名 域或事件的名 域的初值 field fieldTypeName fieldName initialValueeventIn eventTy

35、peName eventName eventOut eventTypeName eventName 39Shape模型節(jié)點(diǎn)，用于創(chuàng)建基本幾何模型和復(fù)雜模型。Shape模型節(jié)點(diǎn)的語(yǔ)法定義：Shape appearance NULL#exposedField SFNode 外觀節(jié)點(diǎn) geometry NULL#exposedField SFNode 幾何節(jié)點(diǎn) 40Sound聲音節(jié)點(diǎn)，是聲音發(fā)射器節(jié)點(diǎn)。Sound聲音節(jié)點(diǎn)的語(yǔ)法定義：Sound direction 0.0 0.0 1.0#exposedField SFVec3f intensity 1.0#exposedField SFFloat l

36、ocation 0.0 0.0 0.0#exposedField SFVec3f maxBack 10.0#exposedField SFFloat maxFront 10.0#exposedField SFFloat minBack 1.0 #exposedField SFFloat minFront 1.0#exposedField SFFloat priority 0.0#exposedField SFFloat source NULL #exposedField SFNode spatialize TRUE #exposedField SFBool41SphereSensor球面檢測(cè)器

37、節(jié)點(diǎn)，是任意軸旋轉(zhuǎn)型傳感器節(jié)點(diǎn)。SphereSensor球面檢測(cè)器節(jié)點(diǎn)的語(yǔ)法定義：SphereSensor enabled TRUE#exposedField SFBool autoOffset TRUE#exposedField SFBooloffset 0 1 0 0#exposedField SFRotationisActive #eventOut SFBooltrackPoint_changed#eventOut SFVec3f rotation_changed#eventOutSFRotation 42sphere球面體節(jié)點(diǎn)，是幾何模型節(jié)點(diǎn)。Sphere球面體節(jié)點(diǎn)的語(yǔ)法定義： Sph

38、ereradius 1.0 #field SFFloat三維球體的半徑，默認(rèn)值為1.043SpotLight聚光燈節(jié)點(diǎn)，是聚光性光源節(jié)點(diǎn)。SpotLight 聚光燈節(jié)點(diǎn)的語(yǔ)法定義：SpotLight location 0.0 0.0 0.0#expodField SFVec3f radius 100#expodField SFFloat intensity 1.0#expodField SFFloat ambientIntensity 0.0#expodField SFFloatbeamWidth 1.570796 #expodField SFFloatcutOffAngle 0.785398

39、#expodField SFFloatattenuation 1.0 0.0 0.0 #expodField SFVec3f color 1.0 1.0 1.0#expodField SFColor direction 0 0-1#expodField SFVec3f on TRUE #expodField SFBool 44Switch開關(guān)節(jié)點(diǎn)，是選擇型群節(jié)點(diǎn)。Switch開關(guān)節(jié)點(diǎn)的語(yǔ)法定義：Switch choice #exposedField MFNodewhichChoice -1 # exposedField SFInt3245TextureTransform紋理變換節(jié)點(diǎn)，是VRML紋理效果節(jié)點(diǎn)。TextureTransform紋理變換節(jié)點(diǎn)的語(yǔ)法定義： TextureTransform translation 0.0 0.0 #exposedField SFVec2f center 0.0 0.0#exposedField SFVec2f rotation 0.0#exposedField