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#ifndef _XPLMProcessing_h_
#define _XPLMProcessing_h_
/*
* Copyright 2005-2012 Sandy Barbour and Ben Supnik
*
* All rights reserved. See license.txt for usage.
*
* X-Plane SDK Version: 2.1.1
*
*/
/*
* This API allows you to get regular callbacks during the flight loop, the
* part of X-Plane where the plane's position calculates the physics of
* flight, etc. Use these APIs to accomplish periodic tasks like logging data
* and performing I/O.
*
* WARNING: Do NOT use these callbacks to draw! You cannot draw during flight
* loop callbacks. Use the drawing callbacks (see XPLMDisplay for more info)
* for graphics.
*
*/
#include "XPLMDefs.h"
#ifdef __cplusplus
extern "C" {
#endif
/***************************************************************************
* FLIGHT LOOP CALLBACKS
***************************************************************************/
/*
*
*
*/
#if defined(XPLM210)
/*
* XPLMFlightLoopPhaseType
*
* You can register a flight loop callback to run either before or after the
* flight model is integrated by X-Plane.
*
*/
enum {
/* Your callback runs before X-Plane integrates the flight model. */
xplm_FlightLoop_Phase_BeforeFlightModel = 0
/* Your callback runs after X-Plane integrates the flight model. */
,xplm_FlightLoop_Phase_AfterFlightModel = 1
};
typedef int XPLMFlightLoopPhaseType;
#endif /* XPLM210 */
#if defined(XPLM210)
/*
* XPLMFlightLoopID
*
* This is an opaque identifier for a flight loop callback. You can use this
* identifier to easily track and remove your callbacks, or to use the new
* flight loop APIs.
*
*/
typedef void * XPLMFlightLoopID;
#endif /* XPLM210 */
/*
* XPLMFlightLoop_f
*
* This is your flight loop callback. Each time the flight loop is iterated
* through, you receive this call at the end. You receive a time since you
* were last called and a time since the last loop, as well as a loop counter.
* The 'phase' parameter is deprecated and should be ignored.
*
* Your return value controls when you will next be called. Return 0 to stop
* receiving callbacks. Pass a positive number to specify how many seconds
* until the next callback. (You will be called at or after this time, not
* before.) Pass a negative number to specify how many loops must go by until
* you are called. For example, -1.0 means call me the very next loop. Try
* to run your flight loop as infrequently as is practical, and suspend it
* (using return value 0) when you do not need it; lots of flight loop
* callbacks that do nothing lowers x-plane's frame rate.
*
* Your callback will NOT be unregistered if you return 0; it will merely be
* inactive.
*
* The reference constant you passed to your loop is passed back to you.
*
*/
typedef float (* XPLMFlightLoop_f)(
float inElapsedSinceLastCall,
float inElapsedTimeSinceLastFlightLoop,
int inCounter,
void * inRefcon);
#if defined(XPLM210)
/*
* XPLMCreateFlightLoop_t
*
* XPLMCreateFlightLoop_t contains the parameters to create a new flight loop
* callback. The strsucture can be expanded in future SDKs - always set
* structSize to the size of your structure in bytes.
*
*/
typedef struct {
int structSize;
XPLMFlightLoopPhaseType phase;
XPLMFlightLoop_f callbackFunc;
void * refcon;
} XPLMCreateFlightLoop_t;
#endif /* XPLM210 */
/*
* XPLMGetElapsedTime
*
* This routine returns the elapsed time since the sim started up in decimal
* seconds.
*
*/
XPLM_API float XPLMGetElapsedTime(void);
/*
* XPLMGetCycleNumber
*
* This routine returns a counter starting at zero for each sim cycle
* computed/video frame rendered.
*
*/
XPLM_API int XPLMGetCycleNumber(void);
/*
* XPLMRegisterFlightLoopCallback
*
* This routine registers your flight loop callback. Pass in a pointer to a
* flight loop function and a refcon. inInterval defines when you will be
* called. Pass in a positive number to specify seconds from registration
* time to the next callback. Pass in a negative number to indicate when you
* will be called (e.g. pass -1 to be called at the next cylcle). Pass 0 to
* not be called; your callback will be inactive.
*
*/
XPLM_API void XPLMRegisterFlightLoopCallback(
XPLMFlightLoop_f inFlightLoop,
float inInterval,
void * inRefcon);
/*
* XPLMUnregisterFlightLoopCallback
*
* This routine unregisters your flight loop callback. Do NOT call it from
* your flight loop callback. Once your flight loop callback is
* unregistered, it will not be called again.
*
*/
XPLM_API void XPLMUnregisterFlightLoopCallback(
XPLMFlightLoop_f inFlightLoop,
void * inRefcon);
/*
* XPLMSetFlightLoopCallbackInterval
*
* This routine sets when a callback will be called. Do NOT call it from your
* callback; use the return value of the callback to change your callback
* interval from inside your callback.
*
* inInterval is formatted the same way as in XPLMRegisterFlightLoopCallback;
* positive for seconds, negative for cycles, and 0 for deactivating the
* callback. If inRelativeToNow is 1, times are from the time of this call;
* otherwise they are from the time the callback was last called (or the time
* it was registered if it has never been called.
*
*/
XPLM_API void XPLMSetFlightLoopCallbackInterval(
XPLMFlightLoop_f inFlightLoop,
float inInterval,
int inRelativeToNow,
void * inRefcon);
#if defined(XPLM210)
/*
* XPLMCreateFlightLoop
*
* This routine creates a flight loop callback and returns its ID. The flight
* loop callback is created using the input param struct, and is inited to be
* unscheduled.
*
*/
XPLM_API XPLMFlightLoopID XPLMCreateFlightLoop(
XPLMCreateFlightLoop_t * inParams);
#endif /* XPLM210 */
#if defined(XPLM210)
/*
* XPLMDestroyFlightLoop
*
* This routine destroys a flight loop callback by ID.
*
*/
XPLM_API void XPLMDestroyFlightLoop(
XPLMFlightLoopID inFlightLoopID);
#endif /* XPLM210 */
#if defined(XPLM210)
/*
* XPLMScheduleFlightLoop
*
* This routine schedules a flight loop callback for future execution. If
* inInterval is negative, it is run in a certain number of frames based on
* the absolute value of the input. If the interval is positive, it is a
* duration in seconds.
*
* If inRelativeToNow is true, ties are interpretted relative to the time this
* routine is called; otherwise they are relative to the last call time or the
* time the flight loop was registered (if never called).
*
* THREAD SAFETY: it is legal to call this routine from any thread under the
* following conditions:
*
* 1. The call must be between the beginning of an XPLMEnable and the end of
* an XPLMDisable sequence. (That is, you must not call this routine from
* thread activity when your plugin was supposed to be disabled. Since
* plugins are only enabled while loaded, this also implies you cannot run
* this routine outside an XPLMStart/XPLMStop sequence.)
*
* 2. You may not call this routine re-entrantly for a single flight loop ID.
* (That is, you can't enable from multiple threads at the same time.)
*
* 3. You must call this routine between the time after XPLMCreateFlightLoop
* returns a value and the time you call XPLMDestroyFlightLoop. (That is, you
* must ensure that your threaded activity is within the life of the object.
* The SDK does not check this for you, nor does it synchronize destruction of
* the object.)
*
* 4. The object must be unscheduled if this routine is to be called from a
* thread other than the main thread.
*
*/
XPLM_API void XPLMScheduleFlightLoop(
XPLMFlightLoopID inFlightLoopID,
float inInterval,
int inRelativeToNow);
#endif /* XPLM210 */
#ifdef __cplusplus
}
#endif
#endif
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