forked from VoxeLibre/VoxeLibre
Fix several undefined global warnings, fix cart movement when over maximum speed, fix cart reattachment to sloped track
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2f0976edc6
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4cdb9fd876
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@ -1207,7 +1207,7 @@ function mcl_util.assign_uuid(obj)
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end
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-- Update the cache with this new id
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aoid = mcl_util.get_active_object_id(obj)
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local aoid = mcl_util.get_active_object_id(obj)
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uuid_to_aoid_cache[le._uuid] = aoid
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return le._uuid
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@ -352,7 +352,7 @@ end
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function mod.create_minecart(entity_id, pos, dir)
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-- Setup cart data
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local uuid = mcl_util.gen_uuid()
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data = make_staticdata( nil, pos, dir )
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local data = make_staticdata( nil, pos, dir )
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data.uuid = uuid
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data.cart_type = entity_id
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update_cart_data(data)
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@ -390,28 +390,21 @@ function mod.place_minecart(itemstack, pointed_thing, placer)
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-- Create the entity with the staticdata already setup
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local sd = minetest.serialize({ uuid=uuid, seq=1 })
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local cart = minetest.add_entity(spawn_pos, entity_id, sd)
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local staticdata = get_cart_data(uuid)
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cart:set_yaw(minetest.dir_to_yaw(cart_dir))
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-- Update static data
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local le = cart:get_luaentity()
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if le then
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le._staticdata = data
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end
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-- Call placer
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local le = cart:get_luaentity()
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if le._mcl_minecarts_on_place then
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le._mcl_minecarts_on_place(le, placer)
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end
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if railpos then
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handle_cart_enter(data, railpos)
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handle_cart_enter(staticdata, railpos)
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end
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local pname = ""
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if placer then
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pname = placer:get_player_name()
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end
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local pname = placer and placer:get_player_name() or ""
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if not minetest.is_creative_enabled(pname) then
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itemstack:take_item()
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end
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@ -9,6 +9,7 @@ local mcl_debug,DEBUG = mcl_util.make_mcl_logger("mcl_logging_minecart_debug", "
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--mcl_debug = function(msg) print(msg) end
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-- Imports
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local mcl_physics = mcl_physics or false
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local FRICTION = mcl_minecarts.FRICTION
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local MAX_TRAIN_LENGTH = mod.MAX_TRAIN_LENGTH
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local SPEED_MAX = mod.SPEED_MAX
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@ -315,7 +316,6 @@ local function do_movement_step(staticdata, dtime)
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",v_0="..tostring(v_0)..
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",x_0="..tostring(x_0)..
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",dtime="..tostring(dtime)..
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",timestep="..tostring(timestep)..
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",dir="..tostring(staticdata.dir)..
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",connected_at="..tostring(staticdata.connected_at)..
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",distance="..tostring(staticdata.distance)
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@ -347,7 +347,7 @@ local function do_movement_step(staticdata, dtime)
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-- Truncate timestep to prevent v_1 from being larger that speed_max
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local v_max = SPEED_MAX
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if (v_0 ~= v_max) and ( v_0 + a * timestep > v_max) then
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if (v_0 < v_max) and ( v_0 + a * timestep > v_max) then
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timestep = ( v_max - v_0 ) / a
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end
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@ -519,22 +519,36 @@ local function do_detached_movement(self, dtime)
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end
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-- Try to reconnect to rail
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local pos_r = vector.round(self.object:get_pos())
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local node = minetest.get_node(pos_r)
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if minetest.get_item_group(node.name, "rail") ~= 0 then
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staticdata.connected_at = pos_r
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staticdata.railtype = node.name
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local pos = self.object:get_pos()
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local yaw = self.object:get_yaw()
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local yaw_dir = minetest.yaw_to_dir(yaw)
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local test_positions = {
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pos,
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vector.offset(vector.add(pos, vector.multiply(yaw_dir, 0.5)),0,-0.3,0),
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vector.offset(vector.add(pos, vector.multiply(yaw_dir,-0.5)),0,-0.3,0),
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}
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local freebody_velocity = self.object:get_velocity()
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staticdata.dir = mod:get_rail_direction(pos_r, mod.snap_direction(freebody_velocity))
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for i=1,#test_positions do
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test_pos = test_positions[i]
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local pos_r = vector.round(test_pos)
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local node = minetest.get_node(pos_r)
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if minetest.get_item_group(node.name, "rail") ~= 0 then
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staticdata.connected_at = pos_r
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staticdata.railtype = node.name
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-- Use vector projection to only keep the velocity in the new direction of movement on the rail
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-- https://en.wikipedia.org/wiki/Vector_projection
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staticdata.velocity = vector.dot(staticdata.dir,freebody_velocity)
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local freebody_velocity = self.object:get_velocity()
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staticdata.dir = mod:get_rail_direction(pos_r, mod.snap_direction(freebody_velocity))
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-- Clear freebody movement
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self.object:set_velocity(vector.new(0,0,0))
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self.object:set_acceleration(vector.new(0,0,0))
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-- Use vector projection to only keep the velocity in the new direction of movement on the rail
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-- https://en.wikipedia.org/wiki/Vector_projection
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staticdata.velocity = vector.dot(staticdata.dir,freebody_velocity)
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print("Reattached velocity="..tostring(staticdata.velocity)..", freebody_velocity="..tostring(freebody_velocity))
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-- Clear freebody movement
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self.object:set_velocity(vector.new(0,0,0))
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self.object:set_acceleration(vector.new(0,0,0))
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return
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end
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end
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end
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