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plane: when decelerating, also employ air brakes

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This commit is contained in:
Erkki Seppälä 2014-10-20 23:43:12 +03:00
parent a67777dc32
commit 67a0e1ea0e
1 changed files with 4 additions and 0 deletions
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entities/plane.lua
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@ -59,6 +59,7 @@ local lift = function(angle)
end
local fwd_frict_coeff = 0.1
local fwd_frict_coeff_decelare_multiplier = 3
local nor_frict_coeff = 0.8
local tail_frict_coeff = 0.4
local tail_area = 5.0
@ -334,6 +335,9 @@ Plane = Class{
-- (* (Gg.V2.smul (fwd_frict_coeff *. fwd_vel ** 2.0 *. head_area) (V.unit (negate vel))) *)
-- (* (to_base (Gg.V2.v 0.0 0.0)); *)
local airdrag = coeff_multiplier * -fwd_frict_coeff * math.pow(fwd_vel, 2.0) * head_area
if self.decelerating then
airdrag = airdrag * fwd_frict_coeff_decelare_multiplier
end
rel_force("airdrag", airdrag, 0, 0, 0.2 * self.ysize)
-- Air friction (and drag?) opposes movement towards plane velocity normal also