|Gary L. Simmons
| rev 03/16/06
Water Cannons? That is correct. A cannon
made out of water, no, a cannon that uses water, yes. A water
cannon is a device that uses a media to propell a player to great
lengths, or to move a player along a desired path. It can use
water, sewege, lava, or even goo... they all do the same thing,
yet lava and goo will hurt the player in the process.
Grendel searched high and low for a correctly used water cannon,
and found Hata "ha-ta-la", a map by Randall Shaw. This
map will be used for the demonstration of this thing.
|Parts List for the Hata Water Cannon
|9 Polygons 1 Light Switch 1 Platform
Switch 1 Light 1 Media 1 Sound (Alarm) 1 Platform
Refer to the parts list above for what you will need, to make
a Water Cannon just like the one in Hata. You can also Download
(Courtesy of the Battle Cat's Litterbox)
the map pack that Hata is in, so you can see how it really works,
but the map pack is large.
An interesting thing this Hata water cannon has, is the ability
to turn it on and off, as well as open and close the entry point.
A siren also chimes in when the cannon is active. Grendel also
keeps wondering who the hey does Hata mean? Mental note, bug Frigidman...
Initial steps, make the extras - light
The light will be used to control the height of the media and
the volume of the sound, and the light of the room.
Make its Active section Intensity of 100.
Inactive's Intensity of 0.
Do not make the light for media pulsate or flicker etc, so
don't mess with the Secondary settings for both the Active and
Make the speed for Becomes Active and Inactive, medium. A
period of 100 is good.
Make it initially INactive, so the light is off to begin with,
which means the sound will be off, and the media will be down.
That will do it for the light. Nothing more needs to be changed
on it from the default settings.
Make its High-tide 0.08 over the floor height of the cannon.
The media will be used as the
flow force in the cannon. It drops below the surface floor of
the cannon when the light is inactive (like it is turned off).
It then rises up a bit to fill the floor of the cannon, to grab
the feet of players and fling them out.
Make its Low-tide 0.05 under the floor height of the cannon.
Put the direction of flow to go out of the cannon.
The flow set for Hata is 0.293 so that it flings the player
just right, so they land out on the hill.
Set the tide light to the light created above.
And make sure that the "Sound is obstructed by the floor"
is checked, so you do not hear water, or sewege, when you step
into a turned off cannon.
That will make the media needed for the cannon. It's a simple
concept really, it just takes some tweaking to get the flow and
height and speed of movements just right, so the cannon will be
useful instead of just an annoyance.
|Making the polygons for where to put the
cannon depends on a few things. The first is you need to make
it far enough from its target so the cannon is useful. Also you
need to set the polygons to be higher than its target to compensate
for gravity. After those, pretty much any design or style can
be used for the cannon. Simple.
A few things were done in Hata that help the look and feel.
One was the lip at the end of the cannon. This was made to
make sure that no media-edge-smearing would occur. This lip is
just .002 beneath the High-tide of the liquid, so that even if
you tried, you would not see the smearing during game play. In
Hata, you can never walk UP to the outside of the cannon and
look into it (too high off the ground).
Here to the left shows that the last chunk was raised up.
It was set to 4.961 (which is .002 below the surface of the media
when the cannon is ON).
Also to the left it shows what the edge of the cannon looks
like when it is on. The thin white line is where smearing will
occur during the game (forge shows bleached white for any areas
The light used for the media was also set on the walls of the
entry chamber, so when the cannon is turned on, everything lights
up. Also the light was used for a few 'Alarm' sound points set
in the chamber and outside to notify others that the cannon is
Last small things: Put a few puddles on the floor of the cannon,
so when the water gets turned off, it looks all wet in there.
Also some random water drop sound areas could be added, and then
flickering lights on light panels. Just a few suggestions Grendel
likes to see done, even if it is a netmap.
Don't make the water cannon be filled up so high the player
has to completely submerge to go through it. These are noisy,
and bothersome, and just don't feel good. You can't shoot while
traveling through them, unless you have the kkv, or fist.
Don't base a level to having a hundred of these things everywhere.
Two is plenty enough, and three just gets in the way.
Don't allow the smearing. Use the technique above to prevent
frontal smearing (Grendel no like that term).