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add fuzz factor to avoid ill-defined y=0.5 case

master
kaen 2016-08-20 16:29:38 -07:00
parent 9aee6e555d
commit 9f6237edf1
1 changed files with 4 additions and 3 deletions
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7
mods/stm/character.lua
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@ -55,6 +55,7 @@ function Character:simulate(dt)
self:update_physics(dt)
end
local PHYSICS_FUZZ = 0.01
--- Perform physics simulation for this character.
-- @param dt time in game seconds to simulate
function Character:update_physics(dt)
@ -64,7 +65,7 @@ function Character:update_physics(dt)
-- -- TODO: better unsticking logic
self.on = node
if stm.is_solid(node) then
self.pos.y = (MapData.get_surface_pos(self.pos) or vector.new(0,0,0)).y - 0.50
self.pos.y = (MapData.get_surface_pos(self.pos) or vector.new(0,0,0)).y - 0.50 + PHYSICS_FUZZ
self.on_ground = false
self.acceleration.y = 0
self.velocity.y = 0
@ -77,13 +78,13 @@ function Character:update_physics(dt)
local old_node_pos = stm.float_to_node(old)
self.on_ground = true
if old_node_pos.y - old.y < 0.50 or not stm.is_solid(node_below) then
if old_node_pos.y - old.y < 0.50 - PHYSICS_FUZZ or not stm.is_solid(node_below) then
self.acceleration.y = -10 / stm.TIME_SCALE
self.on_ground = false
else
self.acceleration.y = math.max(0, self.acceleration.y)
self.velocity.y = math.max(0, self.velocity.y)
self.pos.y = old_node_pos.y - 0.50
self.pos.y = old_node_pos.y - 0.50 + PHYSICS_FUZZ
end
self.velocity = vector.add(self.velocity, vector.multiply(self.acceleration, dt))