1 #include <stdio.h>

2 #include <string.h>

3 #include <stdlib.h>

4 #include "opt.h"

5

6 Options opt;

7

8 static void default_opt()

9 {

10 opt.xsz = 800;

11 opt.ysz = 450;

12 opt.stereo = false;

13

14 opt.world_size[0] = opt.world_size[1] = 128;

15 opt.world_size[2] = 64;

16

17 opt.gen_noise_scale = 1.0f;

18 opt.gen_num_blobs = 10;

19 }

20

21 bool parse_opt(int argc, char **argv)

22 {

23 default_opt();

24

25 for(int i=1; i<argc; i++) {

26 if(argv[i][0] == '-') {

27 if(strcmp(argv[i], "-size") == 0) {

28 if(sscanf(argv[++i], "%dx%d", &opt.xsz, &opt.ysz) != 2) {

29 fprintf(stderr, "-size must be followed by <width>x<height>\n");

30 return false;

31 }

32 } else if(strcmp(argv[i], "-world") == 0) {

33 if(sscanf(argv[++i], "%dx%dx%d", opt.world_size, opt.world_size + 1, opt.world_size + 2) != 3) {

34 fprintf(stderr, "-world must be followed by <width>x<height>x<depth>\n");

35 return false;

36 }

37 } else if(strcmp(argv[i], "-genscale") == 0) {

38 char *endp;

39 opt.gen_noise_scale = strtod(argv[++i], &endp);

40 if(endp == argv[i]) {

41 fprintf(stderr, "-genscale must be followed by a scaling factor\n");

42 return false;

43 }

44 } else if(strcmp(argv[i], "-blobs") == 0) {

45 char *endp;

46 opt.gen_num_blobs = strtol(argv[++i], &endp, 10);

47 if(endp == argv[i]) {

48 fprintf(stderr, "-blobs must be followed by the number of blobs\n");

49 return false;

50 }

51 } else if(strcmp(argv[i], "-stereo") == 0) {

52 opt.stereo = true;

53 } else {

54 fprintf(stderr, "invalid option: %s\n", argv[i]);

55 return false;

56 }

57 } else {

58 fprintf(stderr, "unexpected argument: %s\n", argv[i]);

59 return false;

60 }

61 }

62 return true;

63 }