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/************************************************************************
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PURPOSE: (Simulate a hor-air balloon.)
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LIBRARY DEPENDENCIES:
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((balloon/src/Balloon.o))
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**************************************************************************/
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#ifndef BALLOON_HH
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#define BALLOON_HH
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class Balloon {
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public:
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// State Variables (Uncalculated Variables)
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double pos[2];
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double vel[2];
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double envelope_mass;
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double basket_mass;
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double burner_system_mass;
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double payload_mass;
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double envelope_air_temperature;
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double envelope_radius;
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double envelope_theta;
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double wind_speed;
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double Cd[2];
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// Calculated Variables
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double acc[2];
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double envelope_volume;
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double fixed_mass;
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// Control Variable
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int temperature_change_command;
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int wind_change_command;
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// Methods
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int default_data();
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int state_init();
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int state_deriv();
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int state_integ();
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int check_ground_contact();
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int control();
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double calc_fixed_mass();
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double calc_envelope_volume();
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double calc_total_mass();
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double calc_envelope_air_mass();
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double calc_heated_air_density();
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double calc_buoyancy_force();
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double calc_displaced_air_mass();
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void calc_drag_force(double * F);
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double volume_of_a_spherical_dome( double r, double h);
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double volume_of_a_cone( double r, double h);
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};
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#endif
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