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extract attraction function #83

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extract attraction function #83

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67 changes: 36 additions & 31 deletions mods/sbz_meteorites/attractor.lua
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Original file line number Diff line number Diff line change
@@ -1,45 +1,50 @@
local elapsed = 0

local function attract_meteorite(pos, dtime, t, obj)
local magnitude = 256
if obj:is_player() then
local wielded_item = obj:get_wielded_item()
if wielded_item:is_empty() then return end
magnitude = wielded_item:get_definition().groups.attraction
if not magnitude then return end
magnitude = magnitude * wielded_item:get_count()
end
obj:add_velocity(t * dtime * sbz_api.get_attraction(obj:get_pos(), pos) * magnitude)
if elapsed > 1 then
minetest.add_particlespawner({
time = 1,
amount = math.floor(vector.distance(pos, obj:get_pos()) / 2),
exptime = 2,
size = { min = 2, max = 4 },
drag = 3,
pos = { min = pos, max = obj:get_pos() },
texture = "meteorite_trail_emitter.png" ..
(t < 0 and "^[colorize:#ffcccc:alpha" or "^[colorize:#888888:alpha"),
animation = { type = "vertical_frames", aspect_width = 4, aspect_height = 4, length = -1 },
glow = 7,
attract = {
kind = "line",
origin = vector.zero(),
origin_attached = obj,
direction = pos - obj:get_pos(),
strength = 3,
die_on_contact = false
}
})
end
end

local function attract_meteorites(pos, dtime, t)
elapsed = elapsed + dtime
for _, obj in ipairs(minetest.get_objects_inside_radius(pos, 200)) do
if (obj:is_player() and obj:get_wielded_item()) or (obj:get_luaentity() and obj:get_luaentity().name == "sbz_meteorites:meteorite") then
local magnitude = 256
if obj:is_player() then
local wielded_item = obj:get_wielded_item()
if wielded_item:is_empty() then return end
magnitude = wielded_item:get_definition().groups.attraction
if not magnitude then return end
magnitude = magnitude * wielded_item:get_count()
end
obj:add_velocity(t * dtime * sbz_api.get_attraction(obj:get_pos(), pos) * magnitude)
if elapsed > 1 then
minetest.add_particlespawner({
time = 1,
amount = math.floor(vector.distance(pos, obj:get_pos()) / 2),
exptime = 2,
size = { min = 2, max = 4 },
drag = 3,
pos = { min = pos, max = obj:get_pos() },
texture = "meteorite_trail_emitter.png" ..
(t < 0 and "^[colorize:#ffcccc:alpha" or "^[colorize:#888888:alpha"),
animation = { type = "vertical_frames", aspect_width = 4, aspect_height = 4, length = -1 },
glow = 7,
attract = {
kind = "line",
origin = vector.zero(),
origin_attached = obj,
direction = pos - obj:get_pos(),
strength = 3,
die_on_contact = false
}
})
end
attract_meteorite(pos, dtime, t, obj)
end
end
if elapsed > 1 then elapsed = 0 end
end
sbz_api.attract_meteorites = attract_meteorites
sbz_api.attract_meteorite = attract_meteorite

minetest.register_entity("sbz_meteorites:gravitational_attractor_entity", {
initial_properties = {
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