Tunnel 3d - Copyright (C) by Fabio Ciucci 1997/98


This applet can generate a texturemapped tunnel from any GIF/JPG image.
This applet is fully parametrized, so you can generate all kinds of tunnel
effects.

The following 3 ".class" files must be uploaded: tunnel.class, Lware.class
and anfy.class.

Insert the <applet> tag in your html document as follows to add this applet
to your page (Comments after the ";" symbol are code explanations and
acceptable min/max values. They are not part of the applet language):


<applet code="tunnel3d.class" width=320 height=192> ; Name, Width, Height
<param name=credits value="Applet by Fabio Ciucci (www.anfyjava.com)">
<param name=regcode value="NO">         ; Registration code (if you have it)
<param name=reglink value="NO">         ; Optional URL link when the applet
                                          is "clicked".
<param name=regnewframe value="YES">         ; Reglink opened in new frame?
<param name=regframename value="_blank">     ; Name of new frame for reglink
<param name=statusmsg value="Tunnel3d applet">  ; Statusbar message
<param name=image value="stone.jpg">       ; Image to load
<param name=res value="1">                 ; resolution (1-8)
<param name=lightmin value="1">            ; Min. lightsoucing (1-127)
<param name=lightmax value="127">          ; Max. lightsoucing (1-127)
<param name=lightdec value="18">           ; Light decrementing
<param name=tunnelradius value="20">       ; Radius of tunnel
<param name=shade value="YES">             ; Shading ("YES" or "NO")
<param name=lightinv value="NO">           ; Inverse lightning ("YES" or "NO")
<param name=squared value="NO">            ; Quare instead of spheric (YES-NO)
<param name=tunrot value="1">           	; Tunnel rotation value
<param name=tunadvance value="2">       	; Tunnel advancing value
<param name=xrot value="30">            	; Observer X rotation
<param name=yrot value="30">            	; Observer Y rotation
<param name=zrot value="5">                  ; Observer Z rotation
<param name=interactive value="YES">       ; Interactive mode ("YES" or "NO")
<param name=bends value="YES">               ; Bends ("YES" or "NO")
<param name=numbends value="3">              ; Number of bends
<param name=bendoffset value="0">            ; Bends offset
<param name=bendsizemin value="0">           ; Bends size min.
<param name=bendsizemax value="60">          ; Bends size max.
<param name=bendoffsetinc value="10">        ; Bends offset increment
<param name=bendsizeinc value="2">           ; Bends size increment
<param name=overimg value="NO">              ; Optional image over applet
<param name=overimgX value="0">              ; Over image X offset
<param name=overimgY value="0">              ; Over image Y offset
<param name=memdelay value="1000">           ; Memory deallocation delay
<param name=priority value="3">              ; Task priority (1..10)
<param name=MinSYNC value="10">              ; Min. milliseconds/frame for sync
Sorry, your browser doesn't support Java.    ; Message for no java browsers.
</applet>                                    ; End of applet tag

                             ---------


The following instructions detail how to change parameters:

Attempting to change the credits parameter will disable the applet.

To activate the reg parameters read the shareware registration notes.
In the "regcode" parameter, place the registration code you
purchased from the author. If the code is correct and the applet is run from
the registered domain name, you can use "link" parameters to link to a URL
when the applet is "clicked".

If you set "regnewframe" to "YES", you can specify a specific frame location
for the reglink:

"_blank"  : To load the link in a new blank unnamed browser window.
"_self"   : To load the link into the same window the applet occupies.
"_parent" : To load the link into the immediate FRAMESET parent.
"_top"    : To load the link into the top body of the window.

You can also set a custom frame name, such as "myframe1".

With the "overimg" parameter you can specify the name of an image that will
be painted over the applet. The best options are transparent GIF images.
NOTE: Animated GIF images are supported, but will be displayed as animated
only on latest browsers (Netscape 4 and Explorer 4 or newer).
With "overimgX" and "overimgY" you can center the image over the applet area.

The applet can be of any size. If res=1, remember to place the exact
size of image in "width" and "height" tags. If res=2, place double values,
if res=3 place triple values etc.
(In fact, res is a sort of zoomer).

The image used as texture can be of any size, but the preferred size is
256*256. Try to use GIF or JPG images with a size close to 256*256.

REMEMBER to write the size of the texture image in the textw and texth
parameters!!!

The "tunnelradius" determines the size of tunnel.

You can change the lightning/shading of tunnel with lightmin, lightmax,
lightdec parameters.

Yes can disable/enable shading with the "shade" parameter, and invert the
shading with "lightinv".

You can enable a "square" mode, replacing the cilyndrical one, with the
parameter "squared".

The movements of the tunnel are determined by "tunrot" and "tunadvance".
The movements of observer are determined by "xrot","yrot","zrot".

You can enable interactive mode with "interactive" parameter: if set to
"yes" user will control tunnel movements with mouse.

You can enable the tunnel morphing function setting the "bends" parameter to
"yes". You can control the bends with bendoffset, bendsizemin, bendsizemax,
bendoffsetinc, bendsizeinc.