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Fix friction on slopes, fix cart reversal when timestep is very small or zero

This commit is contained in:
teknomunk 2024-10-30 07:47:42 -05:00
parent c394864546
commit 1f83937de9
1 changed files with 6 additions and 3 deletions
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9
mods/ENTITIES/mcl_minecarts/movement.lua
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@ -7,7 +7,7 @@ local submod = {}
-- Constants
local mcl_debug,DEBUG = mcl_util.make_mcl_logger("mcl_logging_minecart_debug", "Minecart Debug")
--DEBUG = false
--mcl_debug = function(msg) print(msg) end
--mcl_debug,DEBUG = function(msg) print(msg) end,true
-- Imports
local env_physics
@ -362,6 +362,9 @@ local function do_movement_step(staticdata, dtime)
-- Would stop or reverse direction inside this block, calculate time to v_1 = 0
timestep = -v_0 / a
stops_in_block = true
if timestep <= 0.01 then
reverse_direction(staticdata)
end
elseif a ~= 0 then
-- Setting x_1 = x_0 + remaining_in_block, and solving for t gives:
timestep = ( math.sqrt( v_0 * v_0 + 2 * a * remaining_in_block) - v_0 ) / a
@ -387,7 +390,7 @@ local function do_movement_step(staticdata, dtime)
local v_1 = v_0 + a * timestep
if v_1 > v_max then
v_1 = v_max
elseif v_1 < FRICTION / 5 then
elseif v_1 < 0.025 then
v_1 = 0
end
@ -398,7 +401,7 @@ local function do_movement_step(staticdata, dtime)
staticdata.velocity = v_1
staticdata.distance = x_1
if DEBUG and (1==0) and ( v_0 > 0 or a ~= 0 ) then
if DEBUG and ( v_0 > 0 or a ~= 0 ) then
mcl_debug( "- cart #"..tostring(staticdata.uuid)..
": a="..tostring(a)..
",v_0="..tostring(v_0)..