/* the triangle with the largest absolute values is the one
with the most negative weights */
imapaint_tri_weights(ob, mv[0].co, mv[1].co, mv[3].co, p, w);
absw= fabs(w[0]) + fabs(w[1]) + fabs(w[2]);
if(absw < minabsw) {
uv[0]= tf->uv[0][0]*w[0] + tf->uv[1][0]*w[1] + tf->uv[3][0]*w[2];
uv[1]= tf->uv[0][1]*w[0] + tf->uv[1][1]*w[1] + tf->uv[3][1]*w[2];
minabsw = absw;
}
imapaint_tri_weights(ob, mv[1].co, mv[2].co, mv[3].co, p, w);
absw= fabs(w[0]) + fabs(w[1]) + fabs(w[2]);
if(absw < minabsw) {
uv[0]= tf->uv[1][0]*w[0] + tf->uv[2][0]*w[1] + tf->uv[3][0]*w[2];
uv[1]= tf->uv[1][1]*w[0] + tf->uv[2][1]*w[1] + tf->uv[3][1]*w[2];
minabsw = absw;
}
}
else {
imapaint_tri_weights(ob, mv[0].co, mv[1].co, mv[2].co, p, w);
absw= fabs(w[0]) + fabs(w[1]) + fabs(w[2]);
if(absw < minabsw) {
uv[0]= tf->uv[0][0]*w[0] + tf->uv[1][0]*w[1] + tf->uv[2][0]*w[2];
uv[1]= tf->uv[0][1]*w[0] + tf->uv[1][1]*w[1] + tf->uv[2][1]*w[2];
minabsw = absw;
}
}
}
}
dm->release(dm);
}
///* returns 0 if not found, otherwise 1 */
int imapaint_pick_face(ViewContext *vc, Mesh *me, int *mval, unsigned int *index)
{
if(!me || me->totface==0)
return 0;
/* sample only on the exact position */
*index = view3d_sample_backbuf(vc, mval[0], mval[1]);
if((*index)<=0 || (*index)>(unsigned int)me->totface)
return 0;
(*index)--;
return 1;
}
/* returns 0 if not found, otherwise 1 */
static int imapaint_pick_face(ViewContext *vc, const int mval[2], unsigned int *r_index, unsigned int totface)
{
if (totface == 0)
return 0;
/* sample only on the exact position */
*r_index = view3d_sample_backbuf(vc, mval[0], mval[1]);
if ((*r_index) == 0 || (*r_index) > (unsigned int)totface) {
return 0;
}
(*r_index)--;
return 1;
}
