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Parachute: Limit maximum horizontal velocity

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This commit is contained in:
Wuzzy 2022-08-07 11:06:35 +02:00
parent 359dc97d43
commit f789f17e42
1 changed files with 40 additions and 16 deletions
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56
mods/parachute/init.lua
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@ -12,6 +12,12 @@ local CBOX_BOTTOM = 0.8
local CBOX_TOP = 2.8
local CBOX_SIDE = 0.5
local VELOCITY_H_DAMP = 8.0 -- Above this horiztonal velocity it will get quickly forced below this value
local VELOCITY_H_MAX = 8.5 -- Above this horizontal velocity the player controls get disabled
local ACCEL_Y_DAMP = 0.25 -- Y acceleration is multiplied with that every step
local ACCEL_H_DAMP = 1.0 -- Horizontal acceleration is multiplied with that if too fast
local ACCEL_CONTROL = 4.0 -- Acceleration to apply when pushing the movement controls
local function air_physics(v)
local m = 80 -- Weight of player, kg
local g = -GRAVITY -- Earth Acceleration, m/s^2
@ -261,27 +267,45 @@ minetest.register_entity(
local controls = player:get_player_control()
local speed = 4.0
local speed = ACCEL_CONTROL
local accel = {x = 0, y = 0, z = 0}
if controls.down then
accel.x = s * speed
accel.z = c * speed
elseif controls.up then
accel.x = s * -speed
accel.z = c * -speed
local vel = self.object:get_velocity()
vel.y = 0
local maxed = vector.length(vel) >= VELOCITY_H_MAX
-- Control horizontal velocity with the Up/Left/Right/Down keys,
-- but ignore if a max. horizontal velocity is reached
if not maxed then
if controls.down then
accel.x = s * speed
accel.z = c * speed
elseif controls.up then
accel.x = s * -speed
accel.z = c * -speed
end
if controls.right then
accel.x = sr * speed
accel.z = cr * speed
elseif controls.left then
accel.x = sr * -speed
accel.z = cr * -speed
end
else
if vel.x > 0 then
accel.x = -ACCEL_H_DAMP
elseif vel.x < 0 then
accel.x = ACCEL_H_DAMP
end
if vel.z > 0 then
accel.z = -ACCEL_H_DAMP
elseif vel.z < 0 then
accel.z = ACCEL_H_DAMP
end
end
if controls.right then
accel.x = sr * speed
accel.z = cr * speed
elseif controls.left then
accel.x = sr * -speed
accel.z = cr * -speed
end
accel.y = accel.y + air_physics(vel.y) * 0.25
accel.y = accel.y + air_physics(vel.y) * ACCEL_Y_DAMP
if not is_ignore then
self.object:set_acceleration(accel)