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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

PlaneSensor Node


The PlaneSensor node maps the mouse movement into the XY plane, moving the shape in the XY plane of its local coordinate system. See Dragging Sensors for more information on this type of sensors. This node allows you to limit the draggin operation to a rectangular area.

In addition to the fields which are common to all dragging sensors, this node has the following fields:

maxPosition which specifies the maximum X and Y.

minPosition which specifies the minimum X and Y.

Note: if maxPosition is lower than minPosition for an axis, then the movement is not limited for that axis. By default the movement is not limited in neither X or Y.

Syntax:
PlaneSensor {
enabled TRUE
offset 0 0 0
autoOffset TRUE
maxPosition -1 -1
minPosition 0 0
}


In addition to the exposed fields presented in the syntax the CylinderSensor node generates the following events (see Dragging Sensors for a description of their meaning):
  • isActive (boolean)
  • translation_changed (3D vector)
  • trackPoint_changed (3D point)
  • Example: Using a PlaneSensor to move a Sphere in a rectangular area defined by (-1,-1), (1,1).

    First one needs to create a group node which will include both the sensor and a Transform node containg a Sphere geometry.

    Example:
    #VRML V2.0 utf8

    Group {
    children [
    DEF ts PlaneSensor {
    minPosition -1 -1
    maxPosition 1 1
    }
    DEF tr Transform {
    children Shape {geometry Cylinder {}}
    }
    ]
    }


    Now we need to create a route between the eventOut translation_changed from the PlaneSensor to the exposed field translation of the Transform node. The route to achieve this is:

    ROUTE ts.translation_changed TO tr.set_translation

    Note: On the VRML example provided the axes are not inside the same group as the sensor.



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