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)

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(ibuf) {

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

23 } else {

24 glDrawArrays(prim, 0, num_verts);

25 }

26

27 glDisableClientState(GL_VERTEX_ARRAY);

28 glDisableClientState(GL_NORMAL_ARRAY);

29 glDisableClientState(GL_TEXTURE_COORD_ARRAY);

30 #if 0

31 glBegin(GL_QUADS);

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

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

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

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

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

37 }

38 }

39 glEnd();

40 #endif

41 }