From 52c1cb2f7d55d1e34a546446aa816b65c745dbfa Mon Sep 17 00:00:00 2001
From: david <david>
Date: Wed, 15 May 2002 12:10:48 +0000
Subject: [PATCH] Take the static temperature, static pressure, and density
 values from an external source if requested by the
 /environment/params/control-fdm-atmosphere property.

---
 src/FDM/YASim/Atmosphere.cpp | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/FDM/YASim/Atmosphere.cpp b/src/FDM/YASim/Atmosphere.cpp
index 18b54dd24..bc8a754dd 100644
--- a/src/FDM/YASim/Atmosphere.cpp
+++ b/src/FDM/YASim/Atmosphere.cpp
@@ -1,3 +1,5 @@
+#include <Main/fg_props.hxx>
+
 #include "Math.hpp"
 #include "Atmosphere.hpp"
 namespace yasim {
@@ -40,17 +42,26 @@ const float GAMMA = 1.4f;
 
 float Atmosphere::getStdTemperature(float alt)
 {
-    return getRecord(alt, 1);
+    if (fgGetBool("/environment/params/control-fdm-atmosphere"))
+        return fgGetDouble("/environment/temperature-degC") + 273.15;
+    else
+        return getRecord(alt, 1);
 }
 
 float Atmosphere::getStdPressure(float alt)
 {
-    return getRecord(alt, 2);
+    if (fgGetBool("/environment/params/control-fdm-atmosphere"))
+        return fgGetDouble("/environment/pressure-inhg") * 3386.39;
+    else
+        return getRecord(alt, 2);
 }
 
 float Atmosphere::getStdDensity(float alt)
 {
-    return getRecord(alt, 3);
+    if (fgGetBool("/environment/params/control-fdm-atmosphere"))
+        return fgGetDouble("/environment/density-slugft3") * 515.378;
+    else
+        return getRecord(alt, 3);
 }
 
 float Atmosphere::calcVEAS(float spd, float pressure, float temp)
-- 
2.39.5