mirror of
https://github.com/pandorabox-io/spacecannon.git
synced 2024-12-21 05:15:47 +01:00
118 lines
2.6 KiB
Lua
118 lines
2.6 KiB
Lua
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spacecannon.update_formspec = function(meta)
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meta:set_string("formspec", "size[8,2;]" ..
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"button_exit[0,1;8,1;fire;Fire]")
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end
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spacecannon.can_shoot = function(pos)
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return true
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end
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spacecannon.can_destroy = function(pos)
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return true
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end
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spacecannon.fire = function(pos, color, speed, range)
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if not spacecannon.can_shoot(pos) then
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return
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end
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-- check fuel/power
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local meta = minetest.get_meta(pos)
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local owner = meta:get_string("owner")
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if meta:get_int("powerstorage") < spacecannon.config.powerstorage * range then
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-- not enough power
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return
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else
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-- use power
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meta:set_int("powerstorage", 0)
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end
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minetest.sound_play("spacecannon_shoot", {
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pos = pos,
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gain = 1.0,
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max_hear_distance = 16
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})
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local node = minetest.get_node(pos)
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local dir = spacecannon.facedir_to_down_dir(node.param2)
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local obj = minetest.add_entity({x=pos.x+dir.x, y=pos.y+dir.y, z=pos.z+dir.z}, "spacecannon:energycube_" .. color)
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obj:setvelocity({x=dir.x*speed, y=dir.y*speed, z=dir.z*speed})
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end
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-- destroy stuff in range
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-- TODO: resilient material list
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spacecannon.destroy = function(pos,range)
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if not spacecannon.can_destroy(pos) then
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return
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end
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for x=-range,range do
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for y=-range,range do
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for z=-range,range do
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if x*x+y*y+z*z <= range * range + range then
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local np={x=pos.x+x,y=pos.y+y,z=pos.z+z}
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if minetest.is_protected(np, "") then
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return -- fail fast
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end
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local n = minetest.get_node_or_nil(np)
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if n and n.name ~= "air" then
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minetest.set_node(np, {name="air"})
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local itemstacks = minetest.get_node_drops(n.name)
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for _, itemname in ipairs(itemstacks) do
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if math.random(5) == 5 then
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-- chance drop
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minetest.add_item(np, itemname)
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end
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end
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end
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end
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end
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end
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end
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local radius = range
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-- https://github.com/minetest/minetest_game/blob/master/mods/tnt/init.lua
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minetest.add_particlespawner({
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amount = 64,
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time = 0.5,
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minpos = vector.subtract(pos, radius / 2),
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maxpos = vector.add(pos, radius / 2),
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minvel = {x = -10, y = -10, z = -10},
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maxvel = {x = 10, y = 10, z = 10},
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minacc = vector.new(),
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maxacc = vector.new(),
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minexptime = 1,
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maxexptime = 2.5,
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minsize = radius * 3,
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maxsize = radius * 5,
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texture = "spacecannon_spark.png",
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glow = 5
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})
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minetest.sound_play("tnt_explode", {pos = pos, gain = 1.5, max_hear_distance = math.min(radius * 20, 128)})
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end
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-- convert face dir to vector
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spacecannon.facedir_to_down_dir = function(facing)
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return (
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{[0]={x=0, y=-1, z=0},
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{x=0, y=0, z=-1},
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{x=0, y=0, z=1},
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{x=-1, y=0, z=0},
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{x=1, y=0, z=0},
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{x=0, y=1, z=0}})[math.floor(facing/4)]
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end
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