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VRML Script Tutorial
Full list
VRML Interactive Tutorial
Introduction
VRML File Structure
Drawing: Shape node
Geometry Nodes:
Appearance
Let there be Light
Materials with Colored Lights
Hierarchical Node Structures
Inlining Files
Defining and Instancing Nodes
Defining Levels of Detail
Events in VRML
Interpolators
Let the Music Play
Bindable Nodes
Adding Realism to the world
Information about your world
Definition for Auxiliary Nodes
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ProximitySensor Node
The ProximitySensor node is a way of providing interactivity with the user.
The sensor generates events when the user enters, leaves or moves in a
defined rectangular box. This sensor does not relate to the shapes defined
within the same group, i.e. it
does not detect if a shape within a group is close to the user or not.
This node has the following fields:
enabled specifies the status of the sensor;
center determines the center of the rectangular box;
size specifies the size of the box.
The isActive event is generated with the value TRUE by this node
when the field is enabled and the mouse moves from a position outside
the box to a position inside the box. A value FALSE is provided by this
event when the sensor is enabled and the mouse leaves the box.
An event enterTime is generated when the user enters the box, the
event exitTime is generated when the user leaves the box.
When the mouse is inside, enters or leaves the box, the following events
are generated when the mouse moves:
position_changed: Provides the 3D position of the user in the
sensor's coordinate system.
orientation_changed: provides the users orientation.
Syntax:
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ProximitySensor { |
enabled TRUE
center 0 0 0
size 0 0 0
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} |
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When defining several ProximitySensor inside nested groups, all the sensors
will generate events when the user is inside the respective boxes.
Example of a ProximitySensor to turn on and off a light. The light is turned
on as soon as the user enters the Box, and off when the user leaves the
box:
The following source code describes a group
with a Visibility Sensor and a Sound.
Example:
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#VRML V2.0 utf8
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Group {
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children [
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DEF ps ProximitySensor { size 4 4 4}
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DEF sl SpotLight { on FALSE location 0 0 4}
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Shape { appearance Appearance {material Material {}}
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}
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]
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}
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ROUTE ps.isActive TO sl.set_on
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