Lighthouse3d.com

uW(.JUMLO-O)ͭKLSW(L)ɰU7TWHL(3RRl bJP< Send me bugs and suggestions, please
VRML Script Tutorial
Full list

VRML Interactive Tutorial

Introduction
VRML File Structure
Drawing: Shape node
Geometry Nodes:
Box
Sphere
Cone
Cylinder
PointSet
IndexedLineSet
IndexedFaceSet
Extrusion
ElevationGrid
Example: Chessboard
Text
FontStyle
Appearance
Material
Textures
Image Texture
Movie Texture
Pixel Texture
Texture Coordinate
Texture Transform
Let there be Light
Directional Light
Point Light
Spot Light
Materials with Colored Lights
Hierarchical Node Structures
Group
Transform
Collision
Anchor
Billboard
Switch
Inlining Files
Defining and Instancing Nodes
Defining Levels of Detail
Events in VRML
Creating Paths between events: ROUTE
Generating Events based on Timers or User Actions
Timers
Touch Sensor
Visibility Sensor
Dragging Sensors
Plane Sensor
Sphere Sensor
Cylinder Sensor
Proximity Sensors
Example: Proximity sensor
Interpolators
Color
Coordinate
Normal
Orientation
Position
Scalar
Example
Let the Music Play
Sound
AudioClip
Bindable Nodes
Who Am I: NavigationInfo
Where Am I: ViewPoint
Adding Realism to the world
Background
Fog
Information about your world
WorldInfo
Definition for Auxiliary Nodes
Coordinate
Color
Normal

Z6y ];CƼ.YN%s*[Tlש-Ϭ "AcBёd<)Hu)n4ݛ0cյ~\׷B [튂OX(<~X1C]Kl:/e}ݝ8y6K9fԏu{jS[@O4t<^UմGiׯiZ¹[_Dk- Wf8{PF{F/*T  b ,n[tfQҖñA$xs1 y̧w2B1o5WzN{Ubߦ(avώ\C I5x)&gA{lJċ&cd12h@S=\7K(sRQ`EF@IN ~Ur]mohV(ƷyRL }|dJ!lvKO܁d,^M ’&^z!K0lɆB0I0;crUuq)gYЁTh+Qb$m%鬩,80Ds m2cc=3ϜG㠍E3u8! (IӗOxzVng_(uNIA.D7Q@x'b U'[\?I^{͵у28R~L|qXwSEN#zs;hf=g"^yKϷ@QT.EH?`nVv m?s! U٤0j-BH?6^Y",Ry0C)sg,k;WWļgQ`]F-E_߿o-;܅dygZmc 0P50j3P IAY:h>`O!!鷬,$A SDkJ2.):)JyP%4 N6 擗E''vKgks6xd* F#eNeu[wK .ŕgq/dL^ou\R] |ss]׬ IۀU[wL߫ZN =.";sPdVwmű:bd@^ܵ`$cQz!1'JhBvӛ#H;ׅTNi;Օ<4hd֧$HbբqAk?rDe9_gbxmd%KDC`ŢB4b0܏G|D c%e3(,IdGbGL2 !_B%73w VMf=/JXo+<廉?ѩrZ?~)H)>4f#N<[&p2\-$w{E>KX(Uv^xR.%tWZRmW k+R8^ ,$Y0IM,E`Ueh ֪ jkeZWW uEW fvsqycOrin1R704XX_W_"Uhr=D^(/L!!% e: w7榐"%m"͝G}<? |LR8B " P`VI])U2%$`n >Uхt+[x G6G&ɞ `XfS:;' 58XP>dRL*8`R0V܅LYncKj|F*i^ εTקOrJbt7L٦DBIYnmwC'(҂ qJ&ᵀ?^Q^nNv5@K mK6fu`iT̂*tfԬγx+k^~Wlkܼ~МAbSα7.95.~Z.7>9]yF|*.vˇvrX/ ᕗo~z;C 9 '3$@,]xz;uT=+gjUgu6t <*aˈS"N85.\sNUˇo^&;~'qߴ6]U\Gz~p쮸뫆our۸Jڗ]E0[pE5` .BY i ʃe&}s&{3ryOgK|jy:8 ?v5|,bg[L[aks=&՘(y=^MoΗD"ww %J#t$ `w,vr %Ж׾Bnm?DO8ZVi+OQ;tڗGc;SN[U۟zq2>;s^|gI 3~ggrrpw'm||˓})\o9lb$lVGdP#BϠ@+XT?VMLi㜋ÎqE@͘S!t~vmYFK{QMVse@y˅m_4bl|t^$Iצ7f*?kx ċ,kZwO Gм{&EEsu<UcN'IVwSuucj~:F5|<;/I}\(ΌoJQ$itꗅHG%R(,Ё2#uoGxgSQтxwYkwoT# ]Y:e_5i& a&KQ1Q <IJdG17<)!Eq,V#SE~",'ESR\?Nh>,"ˡT$oG11S"7uJtd'nj& ?rXϝsAseP:nsPC2 04[Jb,wA=d>nW0p=US[/_%g0_B^CMrr5FtE8lΠN8n!ga>hCͪG+~116 NGea`p,g"3( 0(xaW]jRrV!j%ϿMVN u0b.0IQ|QAqB ą- cMl)8gnGl0ӧˆ%ܻ{鑌]L.Âl*u+`Ls}XE.N/k-䨏G<.oܠ[Uf21ɴbB]B*+~.O3q럻ccMw_s lוc<= ЕFt1:?,H9Fj,lW)LPj6mkZj|u`qeh-Z'6b.?wo"\ձe3{z5P9)>NauF (ϸ'&4# lNwsJwvvj:ɽ }6L+:nj&|ؙ#,.v<&w:ְXAe-?c?/h)kC;FDGec&U J?(-!N0/fݓ6S"0S\&j(xB ܢlX%ԯA{ Ȃs;#3X#`(סRaFWe?&\[TX}M3`&Lv4j|`]ӧiNpܷi[Kvm*iwy8N^Iy.JFMbYMWd; ?״`;1'Ո!v7X _ZJc4Ɍtr]E;At;<;=j9O3{Ϻ*X_PVfuE: Ɂ~r(< >h:-it8穋߰!1Tkz[ 7FVZ Ԓ(#6a9 e}yG|$h΁8|y(x287&$:@aާ:9BɄ 4gpɉo-1éblcuklnh$+Toe29 ?$Q tmwN`\ @M3}¤S&S{༰=${gg}ݶf$ gFlJ=rZ^{ )1aqOG]]0 Ãa"^K=^z? ()nYW~aor!yn%ސzRu0?fEKbR: $;O|<85~D/vB6E7x5%7Zwȫ+揶2)uHH([f8:WL5ώ""ELN0vS`Ћ3 ]L~_\磑]/3>e[CAVKIiII/I]+;\W0`Co`74mϟl ]v9%ју9>H0gI#q&8>?h iZ6jg3GhJp Ά1Xb(S(ZҸF屚a,f[5T P*)Ixא9 e|f}{-=@Z-ieEXuvF?`䈑a)~Id-x(,(t.D|ӭny |ESw":X)(Jpwut`<g}0yeK`h_zF筫46:bp;ҥdZ WGk5}硶4:N G XO,3; AnWP5TQ6c%5v~cAcL8"hQkY=|fbP,v<DY[;/V0xѢrLoKf Kڶk]ں3l|"bZ ]|ύNÎ(7C1AA"'w(lAa !R᛿ ˢ 0P7>hR(Yvv] ,[n]Jitt_T͊KU01hֈx%o\FFq< #Gl`j7@ڂ֯f}L ߡG%ُQ/7Tn8(Iq ~S4hØ86&[460 T享T`D`Rbdㅹw[VZmg! s뒊$ '؊Y#| ڒh0:WuG"Y[ujLUVO_.Tdx]r8>,OUI$YI8wd[DKP$gh{gȋ IPl LIBDnx† . @J(^y0lJ@H(?6ߧ --ǹq: t 8ҵwpJ-Cmj4 T:Gb[$l/${5ڗ<*YglxH;_\egx]V.Ӗ65RC) xMҢK+ġ"DC'Ϗ`7;~:s;y;p6\:L^׋ݡ{NאxAA]"46D;ra Y>`~ ĺ^%Y6rV.&OE%CDRp-ՐCz-PVMZOQY) o{ E3\@fk<E s2E5[>u:u,2~<9ѹ٠>nQ+Vm%GILDg4С_RVkJyj~bҟJ2!֘ 4;Ա|{j{d(,W3:Gi h bp]Xp%#" =  Ħ$9H}^^mҙ&DM48 R$'w.0J!/GC1QR)fwP>0\5:Ƣ38Z^ LQ5\TB+RrWCrH2O&D!=X)qN2C^I>P).<T@s9pLTBP}zy֑/sW(%\}ٛPewc]T)<4S{Z&`BQ4Lu5yaG5Jp,4`ǖk=J=4c*^!aQKנ#w}8$ZYg4ѐZR%q6ڤk Б}LH\h-=Ft 4}6$aBDi]<)Nl|,Y3.[U Xk%#JϭwP5Y!ְb ѰMN^wmʳu#t^g±1\łqJ^)l NsA.ٛ+Yءl ԀaƯwfuoʦb:MPըޞ1Wm[YC>':ŵ[BWEDQ" 1NFwqm ,!8G/BqY֣E. -XOuܺ!Y#NW78c^j#=F?jШДD&UMDtM[M޺-Er/4並zo7v_5ЕDİYgN:[#dۜ5p;X|2Hi0oqq iÎzBi)6,;6/MQ}: m͞5[id9A}|#d;ݪ9UH>@7p7dA~b-o*E?nt!"TQfMnr{A3lY 8>nm57y-5-eEAC )c]EjUj, S  =غa%e=p=3"O28Z`E竷VdB㬗o3eN' E.QL jT9GT9٨xYhvWh|܍KVPJ>cvY_PxFϭ];XVC*,xZli_+CS ۯtMVUMu d;JP'}H6~'ÌT#\Vм%+mv[lO@M O‡Bv &6!ltH!&}4L/+' ,9P'Y%\?nhrg 9@#avG霽| ̗H[=zr2 }/}jOsJb\'?e;}4GS91؝M{v)39[}ܜZh^7%67sUJzn4X4S=jxmo=sJyR%munh^oS%~,UJ ^zIɿhD>}|}c"l!45d8_nZ"-`jl , ]\`]ŕpq'C q=>6i:>6dJ2n{wXg%|37p$1Tˋ͢ݸb-`'?8uA[٧Y\['{Hmr'w.a: RNh{蟊O9b]koFY~QD^8N>h],@ ņ"U{̐CR %;CTʒlቀj(_?CS3yWs? i|`5;iZ[$$٩ilD5K\dqHN+ҏϙ) ueAE=@x\\08d&RKs>F쫔-駓dH˫} ]5&01JQB4uKnu6$- <ʸLp;4cmCZ]cyͻ7W/ތ~zi(jCi,bebEP]o ]U۝*?|}ZAxo`o)r6屘 (^e{MШW7ºnFm&qޢ FW1LA= E;.wUΞ vIUZ:Qn}XZ6$5i _쑦TS ɾ c=rj8i5{K)dRm(8vM.UCLTdamҀʎoO-e{ p,V$Pki* K6MQ0DBe XlrZr{bXDSbdߝ)N!r$ =M+ G#0T{0iZ5FZC EbgXlqAɵ9z<7{~R7`E\N @ NE@Q@CBpNS&pĴWA q` E Y[Ka`.ӅmmCQXPwXT .,kA }+>dt!쏍/uѳăwb g6c I_TwIsRVTmRxF;>CUmhKmԎLKS^ÛWH]q-_)?nBՃvR]`y0E%|SJָ8_ԔtwA$UVA!+:}mgvUuu?Zx]yRChgR8;d,_1Ec=nOw-j۽-?ZmijWR_N[>Pk}П2P|8̩UǴŠLG#~!o~|

ScalarInterpolator


The ScalarInterpolator node is an interpolator which takes a list of floating point values in the field keyValue.

For a list of the events of this node see interpolator.

Syntax:
ScalarInterpolator {
key [ ]
keyValue[ ]
}


You can use this interpolator with any single floating point value exposed field. Examples:
  • change the speed at which a movie or sound is played.
  • change the shininess or transparency of a Material.
  • change the visibility Range of the Fog node, etc...
  • A complete example is now presented. A red Shape is drawn with a default transparency of 0.0 . The ScalarInterpolator will gradually change it to 1.0 and back to 0.2. The cycle is repeated forever.

    First one needs the to define a Group with a Shape, a TimeSensor, and a ScalarInterpolator.

    Example:
    #VRML V2.0 utf8

    Group {
    children [
    Shape {
    appearance Appearance {
    material DEF mat Material { diffuseColor 1 0 0 }
    }
    geometry Sphere {}
    }
    DEF ci ScalarInterpolator {
    key [ 0 0.5 1 ]
    keyValue [ 0 1 0]
    }
    DEF ts TimeSensor {
    cycleInterval 2
    loop TRUE
    }
    ]
    }


    Now the only thing which is missing is routing the events.

    We need to get the eventOut fraction_changed generated by the TimeSensor. This event outputs a value between 0 and 1. We can use this value to set a key for the ScalarInterpolator by routing the fraction_changed eventOut from the TimeSensor to the set_fraction eventIn from the ScalarInterpolator.

    A new fraction being set in an interpolator causes the keyValue to be changed. As a consequence the interpolator will generate the fraction_changed eventOut. Because the interpolator used is a ScalarInterpolator, this event outputs a floating point value.

    Finally we use this eventOut to set the transparency in the Material node. Because the transparency is an exposed field of the Material node we can use the eventIn set_transparency to change it. To do this we route the fraction_changed eventOut of the ScalarInterpolator to the set_transparency eventIn of the Material node.

    The ROUTE statements to do this are:
    ROUTE ts.fraction_changed TO ci.set_fraction
    ROUTE ci.value_changed TO mat.set_transparency
    Note that the nodes being routed are given a name using the DEF statement. This is because a name is required in a ROUTE statement.