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1 #ifdef __APPLE__
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2 #include <GLUT/glut.h>
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3 #elif defined(WIN32)
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4 #include <glut.h>
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5 #else
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6 #include <GL/glut.h>
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7 #endif
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8
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9 #include "mesh.h"
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10 #include "objfile.h"
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11
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12 /* use objfile to load mesh data (vertices, normals, and texcoords)
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13 * from a wavefront|OBJ file.
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14 */
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15 struct mesh *load_mesh(const char *fname)
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16 {
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17 int i;
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18 struct mesh *m;
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19 struct objfile *obj;
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20
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21 if(!(obj = objf_load(fname))) {
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22 return 0;
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23 }
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24 m = malloc(sizeof *m);
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25 m->num_verts = objf_vertex_count(obj);
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26
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27 m->vert = malloc(m->num_verts * sizeof *m->vert);
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28 m->norm = malloc(m->num_verts * sizeof *m->norm);
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29 m->tc = malloc(m->num_verts * sizeof *m->tc);
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30
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31 for(i=0; i<m->num_verts; i++) {
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32 float *v = objf_vertex(obj, i);
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33 float *n = objf_normal(obj, i);
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34 float *t = objf_texcoord(obj, i);
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35
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36 m->vert[i].x = v[0];
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37 m->vert[i].y = v[1];
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38 m->vert[i].z = v[2];
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39
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40 m->norm[i].x = n[0];
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41 m->norm[i].y = n[1];
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42 m->norm[i].z = n[2];
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43
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44 m->tc[i].x = t[0];
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45 m->tc[i].y = t[1];
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46 }
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47 objf_free(obj);
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48 return m;
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49 }
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50
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51 void free_mesh(struct mesh *m)
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52 {
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53 if(m) {
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54 free(m->vert);
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55 free(m->norm);
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56 free(m->tc);
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57 free(m);
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58 }
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59 }
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60
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61 void render_mesh(struct mesh *m)
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62 {
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63 glEnableClientState(GL_VERTEX_ARRAY);
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64 glEnableClientState(GL_NORMAL_ARRAY);
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65 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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66
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67 glVertexPointer(3, GL_FLOAT, 0, m->vert);
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68 glNormalPointer(GL_FLOAT, 0, m->norm);
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69 glTexCoordPointer(2, GL_FLOAT, 0, m->tc);
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70
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71 glDrawArrays(GL_TRIANGLES, 0, m->num_verts);
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72
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73 glDisableClientState(GL_VERTEX_ARRAY);
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74 glDisableClientState(GL_NORMAL_ARRAY);
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75 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
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76 }
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