mesh loading

[vrtris] / src / cmesh.c

diff --git a/src/cmesh.c b/src/cmesh.c
index 4d74251..3190576 100644 (file)
--- a/src/cmesh.c
+++ b/src/cmesh.c
@@ -366,6 +366,64 @@ int cmesh_attrib_count(struct cmesh *cm, int attr)
        return cmesh_has_attrib(cm, attr) ? cm->nverts : 0;
 }
 
+int cmesh_push_attrib(struct cmesh *cm, int attr, float *v)
+{
+       float *vptr;
+       int i;
+       int cursz = dynarr_size(cm->vattr[attr].data);
+       int newsz = cursz + cm->vattr[attr].nelem;
+
+       if(!(vptr = dynarr_resize(cm->vattr[attr].data, newsz))) {
+               return -1;
+       }
+       cm->vattr[attr].data = vptr;
+       vptr += cursz;
+       for(i=0; i<cm->vattr[attr].nelem; i++) {
+               *vptr++ = *v++;
+       }
+       cm->vattr[attr].vbo_valid = 0;
+       return 0;
+}
+
+int cmesh_push_attrib1f(struct cmesh *cm, int attr, float x)
+{
+       float v[4];
+       v[0] = x;
+       v[1] = v[2] = 0.0f;
+       v[3] = 1.0f;
+       return cmesh_push_attrib(cm, attr, v);
+}
+
+int cmesh_push_attrib2f(struct cmesh *cm, int attr, float x, float y)
+{
+       float v[4];
+       v[0] = x;
+       v[1] = y;
+       v[2] = 0.0f;
+       v[3] = 1.0f;
+       return cmesh_push_attrib(cm, attr, v);
+}
+
+int cmesh_push_attrib3f(struct cmesh *cm, int attr, float x, float y, float z)
+{
+       float v[4];
+       v[0] = x;
+       v[1] = y;
+       v[2] = z;
+       v[3] = 1.0f;
+       return cmesh_push_attrib(cm, attr, v);
+}
+
+int cmesh_push_attrib4f(struct cmesh *cm, int attr, float x, float y, float z, float w)
+{
+       float v[4];
+       v[0] = x;
+       v[1] = y;
+       v[2] = z;
+       v[3] = w;
+       return cmesh_push_attrib(cm, attr, v);
+}
+
 /* indices can be 0, in which case only memory is allocated
  * returns pointer to the index array
  */
@@ -435,6 +493,16 @@ int cmesh_index_count(struct cmesh *cm)
        return cm->nfaces * 3;
 }
 
+int cmesh_push_index(struct cmesh *cm, unsigned int idx)
+{
+       unsigned int *iptr;
+       if(!(iptr = dynarr_push(cm->idata, &idx))) {
+               return -1;
+       }
+       cm->idata = iptr;
+       return 0;
+}
+
 int cmesh_poly_count(struct cmesh *cm)
 {
        if(cm->nfaces) {