From 500b081ca5ce88055da642f0c8ec93d014577c13 Mon Sep 17 00:00:00 2001
From: andy <andy>
Date: Tue, 17 Feb 2004 23:24:36 +0000
Subject: [PATCH] Allow a "fuel" attribute in the approach and cruise tags to
 have values other than the defaults (20% and 50%, respectively)

---
 src/FDM/YASim/Airplane.cpp | 17 ++++++-----------
 src/FDM/YASim/Airplane.hpp |  7 ++++---
 src/FDM/YASim/FGFDM.cpp    |  4 ++--
 3 files changed, 12 insertions(+), 16 deletions(-)

diff --git a/src/FDM/YASim/Airplane.cpp b/src/FDM/YASim/Airplane.cpp
index 09707c7f7..bb95ae9ba 100644
--- a/src/FDM/YASim/Airplane.cpp
+++ b/src/FDM/YASim/Airplane.cpp
@@ -170,27 +170,23 @@ void Airplane::updateGearState()
     }
 }
 
-void Airplane::setApproach(float speed, float altitude)
-{
-    // The zero AoA will become a calculated stall AoA in compile()
-    setApproach(speed, altitude, 0);
-}
-
-void Airplane::setApproach(float speed, float altitude, float aoa)
+void Airplane::setApproach(float speed, float altitude, float aoa, float fuel)
 {
     _approachSpeed = speed;
     _approachP = Atmosphere::getStdPressure(altitude);
     _approachT = Atmosphere::getStdTemperature(altitude);
     _approachAoA = aoa;
+    _approachFuel = fuel;
 }
  
-void Airplane::setCruise(float speed, float altitude)
+void Airplane::setCruise(float speed, float altitude, float fuel)
 {
     _cruiseSpeed = speed;
     _cruiseP = Atmosphere::getStdPressure(altitude);
     _cruiseT = Atmosphere::getStdTemperature(altitude);
     _cruiseAoA = 0;
     _tailIncidence = 0;
+    _cruiseFuel = fuel;
 }
 
 void Airplane::setElevatorControl(int control)
@@ -780,8 +776,7 @@ void Airplane::runCruise()
     Math::mul3(-1, _cruiseState.v, wind);
     Math::vmul33(_cruiseState.orient, wind, wind);
  
-    // Cruise is by convention at 50% tank capacity
-    setFuelFraction(0.5);
+    setFuelFraction(_cruiseFuel);
    
     // Set up the thruster parameters and iterate until the thrust
     // stabilizes.
@@ -824,7 +819,7 @@ void Airplane::runApproach()
     Math::vmul33(_approachState.orient, wind, wind);
     
     // Approach is by convention at 20% tank capacity
-    setFuelFraction(0.2f);
+    setFuelFraction(_approachFuel);
 
     // Run the thrusters until they get to a stable setting.  FIXME:
     // this is lots of wasted work.
diff --git a/src/FDM/YASim/Airplane.hpp b/src/FDM/YASim/Airplane.hpp
index 16f0ca714..bc35a9b30 100644
--- a/src/FDM/YASim/Airplane.hpp
+++ b/src/FDM/YASim/Airplane.hpp
@@ -48,9 +48,8 @@ public:
     int addWeight(float* pos, float size);
     void setWeight(int handle, float mass);
 
-    void setApproach(float speed, float altitude);
-    void setApproach(float speed, float altitude, float aoa); 
-    void setCruise(float speed, float altitude);
+    void setApproach(float speed, float altitude, float aoa, float fuel);
+    void setCruise(float speed, float altitude, float fuel);
 
     void setElevatorControl(int control);
     void addApproachControl(int control, float val);
@@ -134,6 +133,7 @@ private:
     float _cruiseT;
     float _cruiseSpeed;
     float _cruiseWeight;
+    float _cruiseFuel;
 
     Vector _approachControls;
     State _approachState;
@@ -142,6 +142,7 @@ private:
     float _approachSpeed;
     float _approachAoA;
     float _approachWeight;
+    float _approachFuel;
 
     int _solutionIterations;
     float _dragFactor;
diff --git a/src/FDM/YASim/FGFDM.cpp b/src/FDM/YASim/FGFDM.cpp
index 7f3077fce..f1d489708 100644
--- a/src/FDM/YASim/FGFDM.cpp
+++ b/src/FDM/YASim/FGFDM.cpp
@@ -118,12 +118,12 @@ void FGFDM::startElement(const char* name, const XMLAttributes &atts)
 	float spd = attrf(a, "speed") * KTS2MPS;
 	float alt = attrf(a, "alt", 0) * FT2M;
 	float aoa = attrf(a, "aoa", 0) * DEG2RAD;
-	_airplane.setApproach(spd, alt, aoa);
+	_airplane.setApproach(spd, alt, aoa, attrf(a, "fuel", 0.2));
 	_cruiseCurr = false;
     } else if(eq(name, "cruise")) {
 	float spd = attrf(a, "speed") * KTS2MPS;
 	float alt = attrf(a, "alt") * FT2M;
-	_airplane.setCruise(spd, alt);
+	_airplane.setCruise(spd, alt, attrf(a, "fuel", 0.5));
 	_cruiseCurr = true;
     } else if(eq(name, "cockpit")) {
 	v[0] = attrf(a, "x");
-- 
2.39.5