1 #include "object.h"

2 #include "vmath.h"

3 #include "min3d.h"

4 #include "logger.h"

5

6 Object::Object()

7 {

8 }

9

10 Object::~Object()

11 {

12 }

13

14 // ---- sphere ----

15 Sphere::Sphere()

16 {

17 }

18

19 Sphere::~Sphere()

20 {

21 }

22

23 #define USUB 12

24 #define VSUB 6

25

26 void Sphere::draw() const

27 {

28 static Vector3 *varr;

29 static unsigned int *iarr;

30 static int num_verts, num_indices;

31 if(!varr) {

32 int i, j;

33 int uverts = USUB;

34 int vverts = VSUB + 1;

35

36 num_verts = uverts * vverts;

37 varr = new Vector3[num_verts];

38

39 Vector3 *vptr = varr;

40 for(i=0; i<vverts; i++) {

41 float v = (float)i / (float)VSUB;

42 float phi = v * M_PI;

43 for(j=0; j<uverts; j++) {

44 float u = (float)j / (float)uverts;

45 float theta = u * M_PI * 2.0;

46

47 float x = sin(theta) * sin(phi);

48 float y = cos(phi);

49 float z = cos(theta) * sin(phi);

50

51 *vptr++ = Vector3(x, y, z);

52 }

53 }

54

55 num_indices = USUB * VSUB * 4;

56 iarr = new unsigned int[num_indices];

57

58 unsigned int *iptr = iarr;

59 for(i=0; i<VSUB; i++) {

60 for(j=0; j<USUB; j++) {

61 iptr[0] = i * uverts + j;

62 iptr[1] = i * uverts + ((j + 1) % uverts);

63 iptr[2] = iptr[1] + uverts;

64 iptr[3] = iptr[0] + uverts;

65 iptr += 4;

66 }

67 }

68

69 printlog("created sphere mesh\n");

70 printlog(" vertices: %d (%d slices, %d stacks)\n", num_verts, uverts, vverts);

71 printlog(" quads: %d (%d indices, %d usub, %d vsub)\n", USUB * VSUB, num_indices, USUB, VSUB);

72 }

73

74 m3d_color(1, 1, 1);

75

76 m3d_vertex_array(&varr->x);

77 m3d_draw_indexed(M3D_QUADS, iarr, num_indices);

78 m3d_vertex_array(0);

79 }