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Mordeth
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Posts: 1883
Registered: 05-00

Something I've been wanting to make is several kinds of steam puff generators. Something that spits out a steam puff sprite, at an angle of my choice, with a certain speed.

Puffs going straight up or down might be able to be made with SpawnGlitter, AccelGlitter and MummySoul (or just Spawn with low gravity setting).

Puffs that travel at a particular angle on a horizontal plane are a different matter.

Some deprecated ETC stuff uses FogSpawn and FogMove. If we had a parameterised version of that (id, angle-range, speed) I would be able to use that to great effect!

09-11-06 19:19 #

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Quasar
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Posts: 4615
Registered: 08-00

Those were based on the Hexen codepointers for swamp fog cloud generators. They'll need some de-Ravenification (unless our GPL efforts pan out...) before I can reintroduce them ;)

09-11-06 20:26 #

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Joe
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Posts: 255
Registered: 07-04

Just to let you know, i've wrote a SteamSpawn codepointer and i'm just waiting for quasbar to return from school so he can throw it into the old svn and suchlike. It works like:

code:   SteamSpawn ( thingtype, horizontal range, vertical angle, vertical range, speed )

Where:
* Thingtype is the type of thing you're spawning.
* Horizontal range is an angle saying how far the steam puff can spread from the steam spawner's angle.
* Vertical angle is the angle from the horizon in which to fire the puff.
* Verical range works the same as horizontal range but in the vertical plane.
* Speed is how fast it goes :P

10-16-06 20:33 #

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Mordeth
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Posts: 1883
Registered: 05-00

Excellent, thank you! :)

A small nag about "horizontal range". Maybe you can use a Thing's death frames when it goes outside of range, instead of just removing it? That would look a bit more neat. I also take it that a default value of "0" does not remove it at all? And how about stuff that only moves on the Z plane?

10-17-06 11:30 #

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Joe
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Posts: 255
Registered: 07-04

Heh, perhaps my explaination of the horizontal range was a bit crap.

If, for example, you had a horizontal range of 60 degrees and the steam spawner (^) was facing north, the steam would fly out at an angle of anything between -30 and 30 degrees either side of north. Horizontal spread of 0 would make the angle of movement of all the steam puffs equal to the angle of the steam spawner (0 degrees in this case).

code:
  -30   0   30                       0          
    \       /                        |
     \     /                         |
      \   /                          |
       \ /                           |
        ^                            ^
Horiz Range 60 degrees        Horiz Range 0 degrees

As for the vertical angle problem, if you wanted to fire some steam upwards, setting the vertical angle to 90 would result in the steam being fired straight up, -90 fires it straight down. Any angle from -360 to 360 should work ok for vertical angle (i haven't tested for angles out of this range).

code:
    60   90
      \  |
       \ |
        \|
0 -------*       o_o     0 DEGREES
        /|
       / |
      /  |
   -60   -90

The vertical range works the same as the horizontal one, only it uses the vertical angle instead of the thing's angle.

Hope that makes a bit more sense :P

10-17-06 19:31 #

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