This component defines nodes to interact with a pointing device (a mouse).
TouchSensor allows to catch click events on 3D objects.
Drag sensors allow user to edit a transformation of 3D objects:
PlaneSensor allows to move objects,
SphereSensor allows to rotate objects,
CylinderSensor allows to rotate objects around a constrained
For demos and tests of these features,
sensors_pointing_device subdirectory inside our VRML/X3D demo models.
Catch click events on 3D objects. The main functionality is that it sends
event when the user "clicked" the geometry that is sibling to the sensor.
for a demo how to handle it in Pascal.
Full support, including:
You should apply some texture on your shape,
otherwise texture coordinates will not be geneted (and this event
will always generate zero vector).
Note that it's only a single 2D texture coordinate. If you use volumetric 3D textures (from DDS file), the additional texture coordinate components will be ignored. If you use multi-texturing, the additional texture units (above the first) will be ignored.
hitNormal_changed event. Generates nice smooth normals when
the shape is smooth (e.g. creaseAngle > 0).
Note: Normals output by
hitNormal_changed are in
the shape local coordinate system.
Spec doesn't say in which coordinate system they should be,
please report if you have any idea what is expected /
what other browsers do.
Move geometry by dragging.
axisRotation with non-zero rotation is used,
trackPoint_changed is generated in local sensor coordinates
(with transformation and axisRotation applied),
axisRotation is still useful, it is not
a shortcut for using
around the sensor. Reason: wrapping sensor in a
would change it's siblings. So
axisRotation is useful
under our interpretation.
Rotate geometry freely by dragging.
Rotate geometry around an axis by dragging.
PlaneSensor notes about
axisRotation, they apply also here.