Commit Graph

69 Commits

Author SHA1 Message Date
SmallJoker
255031fc91 Replace deprecated function calls 2018-07-01 20:44:03 +01:00
Paramat
37b206e49f
TNT: Raise cost of TNT by adding a TNT stick crafting stage
6 gunpowder and 1 paper crafts to 2 TNT stick craftitems.
9 TNT sticks craft to 1 TNT.
TNT stick is not yet usable as an explosive, possibly later.
2018-06-01 23:41:45 +01:00
sofar
8c71f3d826 Prevent divide by zero (#2106)
This forces all explosions to damage entities within the 1 node
range. If that needs to be disabled, the damage_radius needs to
be set to 0.
2018-04-08 17:57:00 +01:00
tenplus1
3ff296961e TNT: Add tnt.boom defaults
This adds def, def.radius and def.damage_radius defaults to the
tnt.boom() function if they aren't specified on call.
2017-10-10 22:55:49 +01:00
tenplus1
fe67ffda7c TNT: Add explode_center flag
Add 'explode_centre' flag which when false explodes as normal and when true runs on_blast on centre node as well as dropping items.
2017-08-26 22:14:44 +01:00
tenplus1
bb084294ce TNT: Allow a custom explosion sound to be used 2017-08-18 18:41:15 +01:00
tenplus1
c5e97867f3 TNT's tnt:boom cleanup (#1868)
The tnt:boom node doesn't actually need the on_construct and on_timer functions to remove the node after 0.4 seconds as the tnt_explode function already does this beforehand.
2017-08-13 13:46:30 +02:00
SmallJoker
fa4c77feba TNT: Only burn visually connected powder (#1857) 2017-07-29 18:09:15 +02:00
Foz
0f7d0bfd7a TNT: Track TNT owner in metadata for protection mods
It is useful for protection mods to know who owns an exploding
TNT block. This allows the blocks destroyed by the TNT to be
limited to the same ones the owner could destroy without using
TNT.

TNT placed within a protected area by the area owner, and later
ignited by another player will destroy within the protected area
nodes the igniter may not otherwise be able to interact with. Any
player could significantly increase the size of an explosion by
placing more TNT in an adjacent unprotected area if the original
TNT block was placed withing 1 node of such a boundary. This
feature sounds dangerous, but we are talking about TNT. Players
should use it carefully.
2017-07-02 11:30:39 +01:00
paramat
eec1c5a03b Settings: Use new settings object 2017-05-24 07:18:26 +01:00
Fernando Carmona Varo
be9121214c TNT: Gunpowder (and tnt.burn) will trigger the on_ignite of nodes
The previous behaviour is kept as fallback for compatibility, for when the on_ignite
is not defined in the node.
2017-05-01 19:38:38 +01:00
Auke Kok
7b90044574 TNT: start fire nodetimers for created fire nodes.
Without this patch, any fire created(placed) by tnt explosions
will remain forever on the map.
2017-03-14 19:03:34 +00:00
Diego Martínez
496521f4a1 Fix some warnings.
Also fixes the failing travis checks.
2017-03-05 09:27:53 +00:00
Auke Kok
1104d571b0 TNT: Log explosions and player igniting tnt or gunpowder 2017-01-19 21:57:34 -08:00
DS-Minetest
f07c4dcd83 Decrease the cost of gunpowder for trails
The cost of TNT remains the same
2017-01-01 23:41:04 +00:00
paramat
09a229b412 Update 'nodeupdate()' to 'check_for_falling()' API 2016-11-22 05:55:36 +00:00
Fernando Carmona Varo
c824d69182 Fire / tnt: Make flint-and-steel use node on_ignite functions
Add on_ignite functions to tnt, gunpowder, coalblock.
2016-11-07 14:10:00 +00:00
Fernando Carmona Varo
7fee589e03 Tnt: Flammable TNT and gunpowder that activates when burnt
Some code simplifications.
2016-11-02 12:41:14 +00:00
tenplus1
6fdfd2554c Tnt: Various optimisations
Pass nodename to tnt.burn function where possible to reduce
use of 'get_node'.
Change 'ipairs' to 'pairs'.
Use 'nodeupdate_single(pos)' instead of 'nodeupdate(pos)' to
avoid every node triggering recursion, the loop itself takes
the place of recursion and works upwards through horizontal
planes as required.
2016-10-10 03:16:41 +01:00
tenplus1
619ac52693 Add labels to ABMs
Useful for searches and the mod profiler.
2016-08-09 03:56:37 +01:00
tenplus1
14b99a72a9 Tnt: Limit blown up dropped stacks to stack_max
This replaces the hardcoded 99 item limit and instead uses the
get_stack_max() limit for each item.
2016-08-09 03:48:01 +01:00
tenplus1
6c83ea0b48 TNT: Fix bug with huge stacks
This fixes the TNT bug that can crash game when blowing up a container
which holds huge stacks above the norm... e.g. give yourself 65535 snow,
place in chest, blow up, stalled!
2016-08-04 03:21:55 +01:00
Tim
30b0a155fb Stop shadowing upvalues and definitions. 2016-07-15 21:58:49 +01:00
Tim
4473627de0 Remove unused and clean up missused variable-value assignments.
* Unused variables
* Unused values (assigned to variables, but overwritten before use)
* Defining already defined variables instead of reassigning to them.
2016-07-15 21:58:49 +01:00
paramat
e38099225c TNT: Add missing 'then' 2016-07-07 19:22:26 +01:00
tenplus1
497e6f6257 TNT: When disabled leave some useful functionality enabled
- Only remove the TNT craft recipe, tnt:tnt node and the ABM
- Leave tnt:tnt_burning available for explosions in 3rd party mods
2016-07-07 18:10:57 +01:00
paramat
e7a55734d3 Tnt: Avoid divide-by-zero errors in calc_velocity() 2016-05-08 22:53:16 +01:00
Foz
8d3d558e42 Tnt: Fix bug in dropped item counting 2016-05-05 23:46:10 +01:00
Auke Kok
12c763a6c7 TNT: Combine adjacent TNT into the explosion
This uses a vmanip to count adjacent tnt nodes and explodes them
all at once, using an inverse square law to recalculate the radius.
The maximum explosion becomes 125 nodes of tnt yielding a radius of
15 nodes, which does not break my machine and makes it return
in under a second.

This makes both bigger explosions and less stability issues.

The drop code has been simplified and now drops at all times a
reasonable amount of drops, never blanketing the area with drops,
even at the larges explosion level.

Particles are scaled up according to explosion size as well - a
bigger explosion will show bigger particles.

To scale the tnt:boom particle, we move it to the _effects() function.
2016-05-01 18:57:45 +01:00
Auke Kok
098ea0d10a TNT: Allow mods to override entity physics.
Introduces an `on_blast(luaobj, damage)` callback that mods can attach
to an entity def. The function will get called with the damage that
TNT would make.

The function should return three values:

  bool do_damage, bool do_knockback, table drops

do_damage allows the mod to tell the TNT code to perform damage on
the entity for the mod. The mod code should not do anything with
the entity HP. The entity should not be immortal. If false, then
the entity will not be damaged by the TNT mod.

do_knockback allows the mod to tell the TNT mod to perform an
entity knockback effect. If false, no knockback effect is applied
to the entity.

the drops table is a list of items to drop. It may be nil. E.g. {
"wool:red" }.

I've documented both on_blast() API methods in game_api.txt. It is
a better place than lua_api.txt.
2016-04-30 20:47:21 +01:00
Auke Kok
f14b411157 TNT: Fix multiple explosions erasing drops
Any second explosion near a first TNT explosion will punch all
entities found nearby, including item drops. This causes the
item pickup code to think the item was picked up, but by
a `nil` player, thus removing the item.

We query for the immortal entity group, and if the item is in
the immortal group, do not punch the item.
2016-04-30 20:47:21 +01:00
Auke Kok
5cd4b5a231 TNT: make tnt:boom visual a particle, and larger
We reuse the tnt:boom texture for a particle that is added by the
on_construct() of tnt:boom, and has a short expiry time (0.2sec).
It is 3 nodes larged, centered on the explosion.

We then make tnt:boom airlike so it doesn't have a texture, and it's
the thing that emits lots of light (we could even make it exist a
bit longer).

The nice thing about particles is that the client is less susceptible
to lag and will always remove them as fast as possible, so this makes
the visual more constant and responsive.
2016-04-26 22:34:00 +01:00
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