I will take a stab at this, although my scripting abilities are admittedly
weak. Hopefully if I have made a mistake someone else can post to this list
what it is so Kevin and I can both learn.
Kevin,
You will need a script to do this. Both javascript and vrmlscript will work.
Your script should increment a counter to keep track of the number clicks
on the TouchSensor, and a ten if statements for to change the url url using
the Browser.createVrmlFromString method.
Without my testing it to see, it should run something like this:
DEF ChangeTexture Script {
eventIn SFBool ISACTIVE
field SFFloat counter 0
eventOut SFString newURL
"vrmlscript:
function ISACTIVE (value) {
counter += ;
if (counter == 1)
Browser.createVrmlFromString(texture1.gif);
//assumes your textures are in the same dir
if (counter == 2)
Browser.createVrmlFromString(texture2.gif);
//etc. for all the textures.
if (counter == 10)
counter = 0;
//resets the counter to recycle the textures
)
"
}
ROUTE YourNamedTouchSensor.isActive TO ChangeTexture.ISACTIVE
ROUTE ChangeTexture.newURL TO NameOfDEFinedImageTextureNode.set_url
Make sure you DEFine the ImageTexture node.
Hope this works for you.
Dennis McKenzie
At 08:53 PM 7/6/97 -0400, you wrote:
>Question: url change in ImageTexture node
>I am looking for some help. I am trying to accomplish this result.
>
>An example:
>There is a vrml V2.0 scene with a texture mapped object, a box.
>I want to be able to use a touch sensor on the box, when the box is
>clicked on I want the texture map to change. By repeatedly clicking on
>the box cycle through say 10 or so possible texture maps. With each
>click on the box replacing the current texture on it and rendering the
>next texture map in the list of 10. After reaching the end of the list
>it automatically repeats.
>
>Quote from the VRML 2.0 Source book (second edition)
>Page 308 second paragraph
> "The URL list can be changed by sending a value to the implied set_url
>eventIn of the url exposed field. When a value is received by this
>input, the field value is changed, and the new value is output using the
>implied url_changed eventOut of the exposed field."
>
>But then there is no example.
>
>I have been trying to figure out how to write a route from a touch
>sensor to
>the url field of an ImageTexture node. But I can't figure out how this
>works
>because of the different data types.
>I do not know java yet, Do I need a script?
>
>I have been working on this for more than two weeks. If someone would
>let me
>know how this works. It would be much appreciated.
>
>Kevin Knowles
>Please contact me at pyrate@gte.net
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