1 #define _USE_MATH_DEFINES

2 #include <math.h>

3 #include "mesh.h"

4

5 #ifndef M_PI

6 #define M_PI 3.14159265359

7 #endif

8

9 void gen_sphere(std::vector<Vertex> &varr, float rad, int usub, int vsub)

10 {

11 }

12

13 static void torus_vertex(Vertex *vert, float u, float v, float rad, float tube_rad)

14 {

15 float theta = 2.0 * M_PI * u;

16 float phi = 2.0 * M_PI * v;

17

18 float x = 0.0f;

19 float y = sin(phi) * tube_rad;

20 float z = cos(phi) * tube_rad + rad;

21

22 vert->pos.x = z * sin(theta);

23 vert->pos.y = y;

24 vert->pos.z = -x * sin(theta) + z * cos(theta);

25 vert->pos.w = 1.0;

26

27 Vector3 cent;

28 cent.x = sin(theta) * rad;

29 cent.z = cos(theta) * rad;

30

31 vert->normal = normalize(Vector3(vert->pos) - cent);

32 vert->color = Vector4(1.0, 1.0, 1.0, 1.0);

33 }

34

35 void gen_torus(std::vector<Vertex> &varr, float rad, float tube_rad, int usub, int vsub)

36 {

37 int i, j;

38

39 if(usub < 3) usub = 3;

40 if(vsub < 3) vsub = 3;

41

42 float du = 1.0f / (float)usub;

43 float dv = 1.0f / (float)vsub;

44

45

46 for(i=0; i<usub; i++) {

47 float u = (float)i / (float)usub;

48 for(j=0; j<vsub; j++) {

49 float v = (float)j / (float)vsub;

50 Vertex vert[4];

51

52 torus_vertex(vert, u, v, rad, tube_rad);

53 torus_vertex(vert + 1, u, v + dv, rad, tube_rad);

54 torus_vertex(vert + 2, u + du, v + dv, rad, tube_rad);

55 torus_vertex(vert + 3, u + du, v, rad, tube_rad);

56

57 varr.push_back(vert[0]);

58 varr.push_back(vert[1]);

59 varr.push_back(vert[2]);

60 varr.push_back(vert[0]);

61 varr.push_back(vert[2]);

62 varr.push_back(vert[3]);

63

64 }

65 }

66 }