69 lines
2.1 KiB
Lua
Executable File
69 lines
2.1 KiB
Lua
Executable File
mcl_particles = {}
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-- Table of particlespawner IDs on a per-node hash basis
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-- Keys: node position hashes
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-- Values: Tables of particlespawner IDs (each node pos can have an arbitrary number of particlespawners)
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local particle_nodes = {}
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-- Node particles can be disabled via setting
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local node_particles_allowed = minetest.settings:get("mcl_node_particles") or "none"
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local levels = {
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high = 3,
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medium = 2,
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low = 1,
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none = 0,
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}
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allowed_level = levels[node_particles_allowed]
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if not allowed_level then
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allowed_level = levels["none"]
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end
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-- Add a particlespawner that is assigned to a given node position.
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-- * pos: Node positon. MUST use integer values!
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-- * particlespawner_definition: definition for minetest.add_particlespawner
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-- * level: detail level of particles. "high", "medium", "low" or "none". High detail levels are for
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-- CPU-demanding particles, like smoke of fire (which occurs frequently)
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-- NOTE: All particlespawners are automatically removed on shutdown.
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-- Returns particlespawner ID on succcess and nil on failure
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function mcl_particles.add_node_particlespawner(pos, particlespawner_definition, level)
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if allowed_level == 0 or levels[level] > allowed_level then
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return
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end
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local poshash = minetest.hash_node_position(pos)
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if not poshash then
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return
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end
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local id = minetest.add_particlespawner(particlespawner_definition)
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if id == -1 then
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return
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end
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if not particle_nodes[poshash] then
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particle_nodes[poshash] = {}
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end
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table.insert(particle_nodes[poshash], id)
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return id
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end
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-- Deletes all particlespawners that are assigned to a node position.
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-- If no particlespawners exist for this position, nothing happens.
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-- pos: Node positon. MUST use integer values!
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-- Returns true if particlespawner could be removed and false if not
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function mcl_particles.delete_node_particlespawners(pos)
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if allowed_level == 0 then
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return false
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end
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local poshash = minetest.hash_node_position(pos)
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local ids = particle_nodes[poshash]
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if ids then
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for i=1, #ids do
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minetest.delete_particlespawner(ids[i])
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end
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particle_nodes[poshash] = nil
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return true
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end
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return false
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end
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