69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
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#include "dump1090.h"
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#include "structs.h"
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Game game;
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extern void drawPlaneHeading(double , double , double, int, char *);
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extern void drawPlane(double , double, int);
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extern void drawTrail(double *, double *, time_t *, int);
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extern void drawGrid();
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//
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// ============================= Utility functions ==========================
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//
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static uint64_t mstime(void) {
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struct timeval tv;
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uint64_t mst;
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gettimeofday(&tv, NULL);
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mst = ((uint64_t)tv.tv_sec)*1000;
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mst += tv.tv_usec/1000;
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return mst;
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}
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void drawMap(void) {
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struct aircraft *a = Modes.aircrafts;
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time_t now = time(NULL);
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// Refresh screen every (MODES_INTERACTIVE_REFRESH_TIME) miliseconde
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if ((mstime() - Modes.interactive_last_update) < MODES_INTERACTIVE_REFRESH_TIME)
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{return;}
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Modes.interactive_last_update = mstime();
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SDL_FillRect(game.screen, NULL, 0);
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drawGrid();
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while(a) {
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if ((now - a->seen) < Modes.interactive_display_ttl) {
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if (a->bFlags & MODES_ACFLAGS_LATLON_VALID) {
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unsigned char * pSig = a->signalLevel;
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unsigned int signalAverage = (pSig[0] + pSig[1] + pSig[2] + pSig[3] +
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pSig[4] + pSig[5] + pSig[6] + pSig[7] + 3) >> 3;
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drawTrail(a->oldDx, a->oldDy, a->oldSeen, a->oldIdx);
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int colorIdx;
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if((int)(now - a->seen) > MODES_INTERACTIVE_DISPLAY_ACTIVE) {
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colorIdx = -1;
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} else {
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colorIdx = signalAverage;
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}
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if(MODES_ACFLAGS_HEADING_VALID) {
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drawPlaneHeading(a->dx, a->dy,a->track, colorIdx, a->flight);
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} else {
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drawPlane(a->dx, a->dy, colorIdx);
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}
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}
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}
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a = a->next;
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}
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SDL_Flip(game.screen);
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}
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