Commit Graph

37 Commits

Author SHA1 Message Date
Auke Kok f62afa02b7 TNT: lower smoke particle count and speed.
The effect is similar, and the reduction in particles is a small
boost in responsiveness.

To compensate, I've lowered the spawner time and expiration length
as well.
2016-04-26 22:34:00 +01:00
Auke Kok 7a892c70e6 TNT: self-start boom removal timer. 2016-04-26 22:34:00 +01:00
Auke Kok 682d79b82a TNT: make tnt:burning a falling node.
This allows TNT to be used for e.g. traps (drop it from the
ceiling) or weird tnt effects with other explosions.
2016-04-26 22:34:00 +01:00
Auke Kok 8b384fb257 TNT: randomly vary ejecting velocity
We add a +/- 0.5 random value to the velocity vector of
ejecting nodes.

I've spotted a lot of nodes going exactly straight up if blowing
up sand above TNT. The extra variation looks less artificial.
2016-04-26 22:34:00 +01:00
Auke Kok d6c33da355 TNT: Damage mobs, knock back players
We apply punch damage to mobs caught in the blast radius, as
this code previously only hurt players.

We "move" players back 1 node if they're caught in the blast, and
slightly up. We can't "eject" players due to missing API code to
support that, unfortunately.
2016-04-26 22:33:59 +01:00
Auke Kok 386dcdef06 TNT: Whitespace cleanup 2016-04-26 22:33:59 +01:00
Auke Kok 54b87e955d TNT: Add on_blast to all nodes with an inventory
Adds a minor helper function that allows efficient retrieval of
several inventories from a node inventory. We use this helper to
quickly retrieve the items in chests, vessel shelves, book shelves
and furnaces, and return these with the nodes itself to the TNT caller.

The TNT caller then performs the entity physics, and we don't need
to do anything else.

We disable TNT doing anything with bones.

We expose a bug in the code that drops the items - metadata was lost
entirely. This patch corrects that by properly copying the metadata
and creating the drops list inclusive metadata.
2016-04-26 22:33:59 +01:00
Auke Kok a2d4e57716 Call nodeupdate on the entire blast zone
This will make sand and gravel blocks on top of TNT actually fly
in the air.

  https://youtu.be/4omndVZijLc
2016-04-16 19:27:16 +01:00
Auke Kok 8114c3dbab Limit entity speed to 250m/s.
Let's just call it "terminal" velocity.
2016-04-16 19:27:16 +01:00
Auke Kok e6cef57661 TNT: Move timer start to on_create() for burning nodes.
We add on_create() handlers for both burning TNT and burning
gunpowder. Because gunpowder will explode TNT in 1 second,
and not 4, we need to modify the 4 second timer after we
make the TNT burning. Other mods can now place burning TNT
that will by default explode after 4 seconds.
2016-04-16 19:27:16 +01:00
Auke Kok 0736d30e33 TNT: Fix up nil derefs
I spotted two places where under stress (many explosions) luajit would
end up passing nil to these functions. I'm not entirely sure how,
but it seems good form to guard against it, which does make it
more robust. After this patch, I'm not able to crash the server. With
many explosions, it may still lag significantly, but always returns
in the end.
2016-04-16 19:27:16 +01:00
red-001 a84e2669c7 Restructure code to only check `def` once. 2016-04-16 19:27:16 +01:00
Auke Kok ccee025ce3 Calculate blast intensity at all locations.
We define the blast intensity as the square of the tnt_radius, divided
by the square of the distance to the explosion center, where distance
is limited to 1 at the lower end.

When destroying nodes, we calculate the intensity for each node, and
only destroy the nodes when the intensity is 1.0 or larger. To avoid
perfectly spherical explosions, we make sure to retain a randomness
factor of 20%. This will make explosion edges jagged and not smooth,
but not too much.

We pass the calculated intensity to on_blast() functions as well,
except we take the jitter here out and make sure it's always 1.0
or larger.
2016-04-16 19:27:16 +01:00
Auke Kok 8c801529df TNT: Limit amount of stacks ejected.
We apply a log scale to the size of the stacks ejected, so that
in larger explosions we are getting larger stacks. For normal r=3
explosions, this gives stack sizes ~6-7 or so, but for r=10 explosions
it could end up giving stacks of 25+.V
2016-04-16 19:27:16 +01:00
Auke Kok 3ddff2fbea TNT: Chain reaction
With the new high res timer, we can make TNT much better create chain
reactions. This does exactly that.
2016-04-16 19:27:16 +01:00
Auke Kok eafd1ebc43 TNT particles: use drops list smartly
The drops list already has quantities, so let's just select the one
with the highest quantity from it, and use that as tile. Fallback
tile will therefore only be used if explosion happens in air. Oh well.
2016-04-16 19:27:16 +01:00
Auke Kok 3623398b78 TNT: Spacing / codestyle fixes
- Fix spacing errors around = and ..
- Indentation fixes
- Break up long lines
2016-04-16 19:27:16 +01:00
red-001 b25889e742 Make TNT faster by using `VoxelManip()` for removing nodes. 2016-04-16 19:27:16 +01:00
red-001 9f4dc1412b Fix TNT mod calculate blast intensity.
Currently the TNT mod uses a dummy vaule of 1 for this.
2016-04-16 19:27:16 +01:00
red-001 cfef21f4d9 Add TNT API. 2016-04-16 19:27:16 +01:00
Auke Kok 8556dd30e2 TNT: add some depth to the explosion effect
We add a dirt-like particle (drawn from scratch, uses some
colors from default_dirt's palette) to spawn many particles
that have collision enabled around the center of the blast.

This has the effect of obscuring the center of the blast, as
that is a painfully visible empty area when the explosion happens,
as there's only a little spark.

The dirt particles bounce around the walls and floor a bit,
and disappear rapidly, well before the smoke particles disappear.

This is a nice visual distraction that obscures the sudden
appearance of the gaping hole, and makes it a whole lot more
believable.
2016-04-16 19:27:16 +01:00
Auke Kok 8cd049c224 Make TNT a bit more fun.
But not too much.

TNT is a bit underwhelming at the moment. We can make it a bit
more interesting by ejecting not just one or two itemstacks,
but a bunch of them. This code splits up the drops into
separate itemstacks that are 2-5 items together, which
results in generally roughly 10 itemstacks being ejected.

Since now we have multiple ejecta, it makes sense to tune
the ejecta velocities a bit better to get the appearance of
an actual explosion better. The items will not all start
with the same vertical velocity, since that would look
like fireworks. Instead we give them all a different vertical
speed.
2016-04-16 19:27:16 +01:00
Auke Kok 12d5ca2f48 Allow the on_blast API to pass an itemstack.
If the node is special and has an on_blast() handler, we need
to call it instead of getting node drops manually. However, we
do want to know if drops should be added for the special nodes,
so we modify the on_blast() handler code to allow the nodedef
handlers to pass back itemstacks. This could be used by e.g.
the doors mod to drop door items after a blast.

Since this API is documented in lua_api.txt, a separate PR will
be incoming to update the on_blast() documentation.
2016-04-16 19:27:16 +01:00
tenplus1 36d18cb161 added timer to tnt:tnt_burning for explosions
By adding the timer to the tnt:tnt_burning node it will help mods add the block and cause an explosion after 4 seconds instead of doing nothing like in it's current state.
2016-02-18 13:56:57 +00:00
Craig Davison b47a556472 Remove log_mods from TNT
This option is not documented nor is it used with any other mod in Minetest Game so why should it be used in TNT?
2016-02-18 13:56:50 +00:00
paramat 7d2dfe4101 Consolidate ABMs
Spread ABM intervals evenly across 1 to 16 seconds
16s ensures no nodes are missed when player walks past
Adjust chance values to compensate, for identical action rates
Combine lavacooling ABMs into one, return to chance = 1
Grass growth: add 'neighbors = "air"' to avoid
processing the thousands of underground dirt nodes
Grass death: Reduce action rate to that of grass growth
Fire: Use chance = 1 for flame extinguishing
and flame removal when mod is disabled
2016-02-14 05:22:20 +00:00
ShadowNinja c76a91943c Fix TNT drops being placed inside nodes 2016-01-05 23:28:59 +00:00
paramat e15fde1624 Fix is_ground_content settings for nodes
Remove line if set to the default of 'true'
2015-06-18 02:25:02 +01:00
Wuzzy 0aebf864d1 Add gunpowder trails
Uses group “connect_to_raillike”
2015-06-07 14:27:18 +02:00
Novatux aaa6c260cd Copy pos before giving it to on_blast because it can modify it; also remove a debug print that had nothing to do here 2015-05-12 21:03:02 +02:00
Novatux 4bd1094619 Fix problems with TNT 2015-05-12 16:53:04 +02:00
Wuzzy 8bc8dd64c5 Make TNT respect on_blast, implement on_blast for some nodes
Implemented nodes:
- Steel Door: Ignores explosion
- Locked Chest: Ignores explosion
- Fire: Ignores explosion
- TNT: Starts burning
- Burning TNT: Explodes immediately
- Gunpowder: Starts burning
- Burning Gunpowder: Ignores explosion
2015-05-12 16:32:52 +02:00
PilzAdam c654c9fd11 Remove weird constants in default 2015-01-10 15:47:30 +01:00
Gabriel Huber 6967232619 Fix TNT init for undefined enable_tnt setting 2014-07-25 23:29:44 -04:00
ShadowNinja 0ca4520cc2 Rewrite TNT 2014-07-22 12:05:40 -04:00
BlockMen 3180bdfe6c Add protection to TNT (by @tenplus1) 2014-07-13 19:24:57 +02:00
BlockMen 1e628ed92a Add tnt mod (freeminer version) 2014-07-05 16:02:58 +02:00