Sensory Combinatronics Using 3D to Surf the WEB

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1 Intro	2 Concepts	3 Nodes	4 Fields/Events	5 Conformance
A Grammar	B Java	C JavaScript	D Examples	Quick Nodes

 

  Jump to a concept 2.1 Intro   2.1.1 Overview   2.1.2 TOC   2.1.3 Conventions 2.2 Overview   2.2.1 File structure   2.2.2 Header   2.2.3 Scene graph   2.2.4 Prototypes   2.2.5 Routing   2.2.6 Generating files   2.2.7 Presentation   2.2.8 Profiles 2.3 UTF-8 syntax   2.3.1 Clear text   2.3.2 Statements   2.3.3 Node   2.3.4 Field   2.3.5 PROTO   2.3.6 IS   2.3.7 EXTERNPROTO   2.3.8 USE   2.3.9 ROUTE 2.4 Scene graph   2.4.1 Root nodes   2.4.2 Hierarchy   2.4.3 Ancestry   2.4.4 Transform hierarchy   2.4.5 Units & coord sys   2.4.6 Name scope 2.5 VRML & WWW   2.5.1 MIME type   2.5.2 URLs   2.5.3 Relative URLs   2.5.4 Scripting protocols 2.6 Node Semantics   2.6.1 Introduction   2.6.2 DEF/USE   2.6.3 Shapes/geometry   2.6.4 Bounding boxes   2.6.5 Grouping   2.6.6 Lights   2.6.7 Sensors   2.6.8 Interpolators   2.6.9 Time   2.6.10 Bindable nodes   2.6.11 Textures 2.7 Field, eventIn/Out 2.8 PROTO   2.8.1 Declaration   2.8.2 Definition   2.8.3 Scoping 2.9 EXTERNPROTO   2.9.1 Introduction   2.9.2 Interface   2.9.3 URL 2.10 Events   2.10.1 Introduction   2.10.2 Routes   2.10.3 Exectution model   2.10.4 Loops   2.10.5 Fan-in/fan-out 2.11 Time   2.11.1 Introduction   2.11.2 Origin   2.11.3 Changing time 2.12 Scripting   2.12.1 Introduction   2.12.2 Execution   2.12.3 Initialize/shutdown   2.12.4 eventsProcessed   2.12.5 Direct outputs   2.12.6 Asynchronous   2.12.7 Languages   2.12.8 EventIns   2.12.9 fields & events   2.12.10 Browser interface 2.13 Navigation   2.13.1 Introduction   2.13.2 Paradigms   2.13.3 Viewing model   2.13.4 Collisions 2.14 Lighting   2.14.1 Introduction   2.14.2 off   2.14.3 on   2.14.4 Equations   2.14.5 References           Jump to a node 3.1 Intro 3.2 Anchor 3.3 Appearance 3.4 AudioClip 3.5 Background 3.6 Billboard 3.7 Box 3.8 Collision 3.9 Color 3.10 ColorInterpolator 3.11 Cone 3.12 Coordinate 3.13 CoordinateInterpolator 3.14 Cylinder 3.15 CylinderSensor 3.16 DirectionalLight 3.17 ElevationGrid 3.18 Extrusion 3.19 Fog 3.20 FontStyle 3.21 Group 3.22 ImageTexture 3.23 IndexedFaceSet 3.24 IndexedLineSet 3.25 Inline 3.26 LOD 3.27 Material 3.28 MovieTexture 3.29 NavigationInfo 3.30 Normal 3.31 NormalInterpolator 3.32 OrientationInterpolator 3.33 PixelTexture 3.34 PlaneSensor 3.35 PointLight 3.36 PointSet 3.37 PositionInterpolator 3.38 ProximitySensor 3.39 ScalarInterpolator 3.40 Script 3.41 Shape 3.42 Sound 3.43 Sphere 3.44 SphereSensor 3.45 SpotLight 3.46 Switch 3.47 Text 3.48 TextureCoordijnate 3.49 TextureTransform 3.50 TimeSensor 3.51 TouchSensor 3.52 Transform 3.53 Viewpoint 3.54 VisibilitySensor 3.55 WorldInfo

 

3.11 Cone

Cone { 

  field     SFFloat   bottomRadius 1        # (0,)

  field     SFFloat   height       2        # (0,)

  field     SFBool    side         TRUE

  field     SFBool    bottom       TRUE

}

The Cone node specifies a cone which is centred in the local coordinate system and whose central axis is aligned with the local Y-axis. The bottomRadius field specifies the radius of the cone's base, and the height field specifies the height of the cone from the centre of the base to the apex. By default, the cone has a radius of 1.0 at the bottom and a height of 2.0, with its apex at y = height/2 and its bottom at y = -height/2. Both bottomRadius and height must be greater than 0.0. Figure 3-10 illustrates the Cone node.

Figure 3-10: Cone node

The side field specifies whether sides of the cone are created and the bottom field specifies whether the bottom cap of the cone is created. A value of TRUE specifies that this part of the cone exists, while a value of FALSE specifies that this part does not exist (not rendered or eligible for collision or sensor intersection tests).

When a texture is applied to the sides of the cone, the texture wraps counterclockwise (from above) starting at the back of the cone. The texture has a vertical seam at the back in the X=0 plane, from the apex (0, height/2, 0) to the point (0, -height/2, -bottomRadius). For the bottom cap, a circle is cut out of the texture square centred at (0, -height/2, 0) with dimensions (2 × bottomRadius) by (2 × bottomRadius). The bottom cap texture appears right side up when the top of the cone is rotated towards the -Z-axis. TextureTransform affects the texture coordinates of the Cone.

The Cone geometry requires outside faces only. When viewed from the inside the results are undefined.

#VRML V2.0 utf8

Transform { children [

  Transform {

    translation 0 2.0 0      # sit on top of other Cone

    children Transform {

      translation 0 -1 0

      children Shape {

        geometry Cone { bottomRadius 2 height 1 }

        appearance Appearance {

          material Material { diffuseColor 1 1 1 }

        }

      }

    }

  }

  Transform {

    translation 0 1 0         # sit on y=0

    children Transform {

      translation 0 -1 0

      children Shape {

        geometry Cone {

          bottomRadius 2 height 4 bottom FALSE

        }

        appearance Appearance {

          material Material { diffuseColor 1.0 1.0 1.0 }

          texture ImageTexture { url "marble2.gif" }

        }

      }

    }

  }

  DirectionalLight { direction -.5 -0.5 .6 }

  Background { skyColor 1 1 1 }

  NavigationInfo { type "EXAMINE" }

]}

Figure 3-11: Example Cone Nodes with Texture Image