131 lines
4.5 KiB
Lua
131 lines
4.5 KiB
Lua
local ns = artifact
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minetest.register_entity(":artifact:burst", {
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initial_properties = {
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visual = "sprite",
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textures = {"blank.png"},
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pointable = false,
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physical = true,
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collide_with_objects = false,
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collisionbox = {
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-0.2, -0.2, -0.2,
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0.2, 0.2, 0.2
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},
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static_save = false,
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},
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on_activate = function(e)
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e.object:set_armor_groups{immortal = 1}
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end,
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on_deactivate = function(e)
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for _, x in ipairs(e._particles or {}) do
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minetest.delete_particlespawner(x)
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end
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end,
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on_step = function(e, dtime, movement)
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-- Minetest's collision is rather bad, but we also shouldn't collide with players,
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-- hence we must implement our own rudimentary collision detection.
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-- In this case, any intersection on the segment between our last position and our
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-- current one should be considered a collision and result in detonation (and
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-- at the exact intersection point, if available).
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local collision
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if not e._critical then
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for x in minetest.raycast(e.old_pos or e.object:get_pos(), e.object:get_pos(), true, true, {nodes = {}, objects = {playser = false}}) do
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collision = x
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break
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end
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end
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if collision or movement and movement.collides then
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if collision then
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e.object:set_pos(collision.intersection_point)
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end
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minetest.add_particlespawner {
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pos = e.object:get_pos(),
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radius = 0.1,
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texture = {
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name = "artifact_light.png",
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alpha_tween = {1, 0}
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},
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glow = 8,
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size_tween = {
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{min = 2, max = 3},
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{min = 4, max = 5}
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},
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attract = {
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kind = "point",
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strength = {
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min = -50,
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max = -20,
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},
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origin = e.object:get_pos()
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},
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amount = 25,
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exptime = 0.5,
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drag = 1,
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time = 0.1,
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}
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artifact.play_sound {
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name = "artifact_burst_impact",
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pos = e.object:get_pos()
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}
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e.object:remove()
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if movement and movement.collisions[1] and movement.collisions[1].type == "node" then
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local pos = movement.collisions[1].node_pos
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local name = minetest.get_node(pos).name
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if minetest.registered_nodes[name].on_impact then
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minetest.registered_nodes[name].on_impact(pos)
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end
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end
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return
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end
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e.old_pos = e.object:get_pos()
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end,
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impulse = function(e, vel)
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-- The documentation said that `vel` is relative to the parent entity...
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-- I guess the documentation is wrong?
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local rot = vel:normalize():dir_to_rotation()
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local min, max = vector.sort(vector.new(-1,-1,-1):rotate(rot), vector.new(1,1,0):rotate(rot))
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e._particles = {
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-- Tail
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minetest.add_particlespawner {
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attached = e.object,
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pos = {
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min = vector.new(-1,-1,-1) *0.2,
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max = vector.new(1,1,1) *0.2
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},
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vel = {
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min = min,
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max = max
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},
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texture = {
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name = "artifact_light.png",
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alpha_tween = {1, 0}
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},
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size = 0.4,
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glow = 10,
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amount = 450,
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time = 0
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},
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-- Head
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minetest.add_particlespawner {
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attached = e.object,
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pos = vector.zero(),
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vel = vel,
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texture = "[fill:16x16:0,0:#fff",
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size_tween = {3, 0},
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glow = 14,
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amount = 150,
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time = 0,
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exptime = 0.1
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}
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}
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e.object:set_velocity(vel)
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end
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})
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function ns.do_shoot(m, dir)
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artifact.play_sound {
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name = "artifact_burst_fire",
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pos = dir and m or m.pos
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}
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minetest.add_entity(dir and m +dir or m.pos +m.dir, "artifact:burst"):get_luaentity():impulse((dir or m.dir) *30)
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end
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