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VRML Script Tutorial
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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

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Elevation Grid Example: Chessboard


A chess board is made of 64 tiles, in a 8x8 grid. The tiles are colored black and white, so that two tiles sharing a side have different colors.

As far as defining the tiles, The ElevationGrid for this purpose is as follows:

Example:
geometry ElevationGrid {
xDimension 9
zDimension 9
xSpacing 1
zSpacing 1
height [
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
]
}


Note that the dimensions specified are the number of tiles plus one. The same goes for the list of heights, there are xDimension x zDimension height values specified.

Now we need to define the colors. First set the field colorPerVertex to FALSE. This implies that the colors defined are applied to each square of the chessboard, and not to the vertices.

Next set the color field to a Color node with 64 values, alternating between black and white. The complete code is as follows:

Example:
geometry ElevationGrid {
xDimension 9
zDimension 9
xSpacing 1
zSpacing 1
height [
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
]
colorPerVertex FALSE
color Color {
color [
0 0 0, 1 1 1, 0 0 0, 1 1 1, 0 0 0, 1 1 1, 0 0 0, 1 1 1,
1 1 1, 0 0 0, 1 1 1, 0 0 0, 1 1 1, 0 0 0, 1 1 1, 0 0 0,
0 0 0, 1 1 1, 0 0 0, 1 1 1, 0 0 0, 1 1 1, 0 0 0, 1 1 1,
1 1 1, 0 0 0, 1 1 1, 0 0 0, 1 1 1, 0 0 0, 1 1 1, 0 0 0,
0 0 0, 1 1 1, 0 0 0, 1 1 1, 0 0 0, 1 1 1, 0 0 0, 1 1 1,
1 1 1, 0 0 0, 1 1 1, 0 0 0, 1 1 1, 0 0 0, 1 1 1, 0 0 0,
0 0 0, 1 1 1, 0 0 0, 1 1 1, 0 0 0, 1 1 1, 0 0 0, 1 1 1,
1 1 1, 0 0 0, 1 1 1, 0 0 0, 1 1 1, 0 0 0, 1 1 1, 0 0 0,
]
}
}