Added DCS atmosphere API functions.

COORDINATE:GetTemperature(height) returns the temperature (optionally as a function of height ASL).
COORDINATE:GetPressure(height) returns the pressure (optionally as a function of height ASL).
COORDINATE:GetWind(height) returns the wind direction and strength (optionally as a function of height ASL).
UTILS.BeaufortScale(speed) returns the Beaufort number and wind description as a function of wind speed.
This commit is contained in:
funkyfranky 2018-02-12 22:50:23 +01:00
parent 6f6db6d26f
commit f2774dbf71
2 changed files with 98 additions and 0 deletions

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@ -420,6 +420,57 @@ do -- COORDINATE
local SourceVec3 = self:GetVec3()
return ( ( TargetVec3.x - SourceVec3.x ) ^ 2 + ( TargetVec3.z - SourceVec3.z ) ^ 2 ) ^ 0.5
end
--- Returns the temperature in Degrees Celsius.
-- @param #COORDINATE self
-- @param height (Optional) parameter specifying the height ASL.
-- @return Temperature in Degrees Celsius.
function COORDINATE:GetTemperature(height)
local y=height or self.y
env.info("FF height = "..y)
local point={x=self.x, y=height or self.y, z=self.z}
-- get temperature [K] and pressure [Pa] at point
local T,P=atmosphere.getTemperatureAndPressure(point)
-- Return Temperature in Deg C
return T-273.15
end
--- Returns the pressure in hPa.
-- @param #COORDINATE self
-- @param height (Optional) parameter specifying the height ASL. E.g. set height=0 for QNH.
-- @return Pressure in hPa.
function COORDINATE:GetPressure(height)
local point={x=self.x, y=height or self.y, z=self.z}
-- get temperature [K] and pressure [Pa] at point
local T,P=atmosphere.getTemperatureAndPressure(point)
-- Return Pressure in hPa.
return P/100
end
--- Returns the wind direction (from) and strength.
-- @param #COORDINATE self
-- @param height (Optional) parameter specifying the height ASL. The minimum height will be always be the land height since the wind is zero below the ground.
-- @return Direction the wind is blowing from in degrees.
-- @return Wind strength in m/s.
function COORDINATE:GetWind(height)
local landheight=self:GetLandHeight()+0.1 -- we at 0.1 meters to be sure to be above ground since wind is zero below ground level.
local point={x=self.x, y=math.max(height or self.y, landheight), z=self.z}
-- get wind velocity vector
local wind = atmosphere.getWind(point)
local direction = math.deg(math.atan2(wind.z, wind.x))
if direction < 0 then
direction = 360 + direction
end
-- Convert to direction to from direction
if direction > 180 then
direction = direction-180
else
direction = direction+180
end
local strength=math.sqrt((wind.x)^2+(wind.z)^2)
-- Return wind direction and strength km/h.
return direction, strength
end
--- Return the 3D distance in meters between the target COORDINATE and the COORDINATE.

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@ -432,3 +432,50 @@ function UTILS.IsInSphere( InVec3, Vec3, Radius )
return InSphere
end
-- Beaufort scale: returns Beaufort number and wind description as a function of wind speed in m/s.
function UTILS.BeaufortScale(speed)
local bn=nil
local bd=nil
if speed<0.51 then
bn=0
bd="Calm"
elseif speed<2.06 then
bn=1
bd="Light Air"
elseif speed<3.60 then
bn=2
bd="Light Breeze"
elseif speed<5.66 then
bn=3
bd="Gentle Breeze"
elseif speed<8.23 then
bn=4
bd="Moderate Breeze"
elseif speed<11.32 then
bn=5
bd="Fresh Breeze"
elseif speed<14.40 then
bn=6
bd="Strong Breeze"
elseif speed<17.49 then
bn=7
bd="Moderate Gale"
elseif speed<21.09 then
bn=8
bd="Fresh Gale"
elseif speed<24.69 then
bn=9
bd="Strong Gale"
elseif speed<28.81 then
bn=10
bd="Storm"
elseif speed<32.92 then
bn=11
bd="Violent Storm"
else
bn=12
bd="Hurricane"
end
return bn,bd
end