Difference between revisions of "Source:NetHack 2.2a/track.c"
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Latest revision as of 02:53, 4 March 2008
Below is the full text to track.c from the source code of NetHack 2.2a. To link to a particular line, write [[NetHack 2.2a/track.c#line123]], for example.
Warning! This is the source code from an old release. For the latest release, see Source code
Screenshots and source code from Hack are used under the CWI license.
1. /* SCCS Id: @(#)track.c 1.4 87/08/08 2. /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */ 3. /* track.c - version 1.0.2 */ 4. 5. #include "hack.h" 6. 7. #define UTSZ 50 8. 9. coord utrack[UTSZ]; 10. int utcnt = 0; 11. int utpnt = 0; 12. 13. initrack(){ 14. utcnt = utpnt = 0; 15. } 16. 17. /* add to track */ 18. settrack(){ 19. if(utcnt < UTSZ) utcnt++; 20. if(utpnt == UTSZ) utpnt = 0; 21. utrack[utpnt].x = u.ux; 22. utrack[utpnt].y = u.uy; 23. utpnt++; 24. } 25. 26. coord * 27. gettrack(x,y) register x,y; { 28. register int i,cnt,dist; 29. coord tc; 30. cnt = utcnt; 31. for(i = utpnt-1; cnt--; i--){ 32. if(i == -1) i = UTSZ-1; 33. tc = utrack[i]; 34. dist = (x-tc.x)*(x-tc.x) + (y-tc.y)*(y-tc.y); 35. if(dist < 3) 36. return(dist ? &(utrack[i]) : 0); 37. } 38. return(0); 39. }