50 wiersze
2.0 KiB
C
50 wiersze
2.0 KiB
C
// --------------------------------------------------------------
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// CU Spaceflight Landing Prediction
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// Copyright (c) CU Spaceflight 2009, All Right Reserved
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//
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// Written by Rob Anderson
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// Modified by Fergus Noble
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//
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// THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
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// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
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// PARTICULAR PURPOSE.
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// --------------------------------------------------------------
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#ifndef __ALTITUDE_H__
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#define __ALTITUDE_H__
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typedef struct altitude_model_s altitude_model_t;
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// create an altitude/time model with given parameters, must be called before
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// calling run_model if descent_mode is DESCENT_MODE_DESCENDING then we start
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// off with the balloon descending i.e. after burst
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altitude_model_t *altitude_model_new (int descent_mode,
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float burst_alt,
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float ascent_rate,
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float drag_coeff);
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// free resources associated with the specified altitude model.
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void altitude_model_free (altitude_model_t *model);
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// returns the altitude corresponding to a certain time into the flight (in seconds)
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// the result it stored in the alt variable.
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// the contents of alt when the function is called with time_into_flight = 0
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// will be taken as the starting altitude returns 1 normally and 0 when the
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// flight has terminated
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int altitude_model_get_altitude
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(altitude_model_t *model,
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int time_into_flight,
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float *alt);
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// it seems like overkill to do it this way but it is in preparation for being able to load in
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// arbitrary altitude/time profiles from a file
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#define DESCENT_MODE_DESCENDING 1
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#define DESCENT_MODE_NORMAL 0
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#endif // __ALTITUDE_H__
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