1 #include "opengl.h"

2 #include "geom.h"

3

4 #ifdef SINGLE_PRECISION_MATH

5 #define ELEM_TYPE GL_FLOAT

6 #else

7 #define ELEM_TYPE GL_DOUBLE

8 #endif

9

10 void draw_mesh(unsigned int prim, int num_verts, const Vertex *vbuf, const unsigned int *ibuf, int attr_tang_loc)

11 {

12 glEnableClientState(GL_VERTEX_ARRAY);

13 glVertexPointer(3, ELEM_TYPE, sizeof *vbuf, &vbuf->pos);

14

15 glEnableClientState(GL_NORMAL_ARRAY);

16 glNormalPointer(ELEM_TYPE, sizeof *vbuf, &vbuf->norm);

17

18 glEnableClientState(GL_TEXTURE_COORD_ARRAY);

19 glTexCoordPointer(2, ELEM_TYPE, sizeof *vbuf, &vbuf->tc);

20

21 if(attr_tang_loc >= 0) {

22 glEnableVertexAttribArrayARB(attr_tang_loc);

23 glVertexAttribPointerARB(attr_tang_loc, 3, ELEM_TYPE, GL_FALSE, sizeof *vbuf, &vbuf->tang);

24 }

25

26 if(ibuf) {

27 glDrawElements(prim, num_verts, GL_UNSIGNED_INT, ibuf);

28 } else {

29 glDrawArrays(prim, 0, num_verts);

30 }

31

32 glDisableClientState(GL_VERTEX_ARRAY);

33 glDisableClientState(GL_NORMAL_ARRAY);

34 glDisableClientState(GL_TEXTURE_COORD_ARRAY);

35

36 if(attr_tang_loc >= 0) {

37 glDisableVertexAttribArrayARB(attr_tang_loc);

38 }

39 #if 0

40 glBegin(GL_QUADS);

41 for(int i=0; i<count; i++) {

42 for(int j=0; j<4; j++) {

43 const Vertex *v = vbuf + ibuf[i * 4 + j];

44 glNormal3f(v->norm.x, v->norm.y, v->norm.z);

45 glVertex3f(v->pos.x, v->pos.y, v->pos.z);

46 }

47 }

48 glEnd();

49 #endif

50 }