diff options
Diffstat (limited to 'source/blender')
| -rw-r--r-- | source/blender/render/intern/source/convertblender.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/source/blender/render/intern/source/convertblender.c b/source/blender/render/intern/source/convertblender.c index 620f9d41818..67e899e425e 100644 --- a/source/blender/render/intern/source/convertblender.c +++ b/source/blender/render/intern/source/convertblender.c @@ -2820,7 +2820,7 @@ static void init_render_curve(Render *re, ObjectRen *obr, int timeoffset) ListBase disp={NULL, NULL}; Material **matar; float *data, *fp, *orco=NULL; - float n[3], mat[4][4]; + float n[3], mat[4][4], nmat[4][4]; int nr, startvert, a, b; int need_orco=0, totmat; @@ -2835,6 +2835,11 @@ static void init_render_curve(Render *re, ObjectRen *obr, int timeoffset) mult_m4_m4m4(mat, re->viewmat, ob->obmat); invert_m4_m4(ob->imat, mat); + /* local object -> world space transform for normals */ + copy_m4_m4(nmat, mat); + transpose_m4(nmat); + invert_m4(nmat); + /* material array */ totmat= ob->totcol+1; matar= MEM_callocN(sizeof(Material*)*totmat, "init_render_surf matar"); @@ -2891,13 +2896,20 @@ static void init_render_curve(Render *re, ObjectRen *obr, int timeoffset) zero_v3(n); index= dl->index; for (a=0; a<dl->parts; a++, index+=3) { + int v1 = index[0], v2 = index[1], v3 = index[2]; + float *co1 = &dl->verts[v1 * 3], + *co2 = &dl->verts[v2 * 3], + *co3 = &dl->verts[v3 * 3]; + vlr= RE_findOrAddVlak(obr, obr->totvlak++); - vlr->v1= RE_findOrAddVert(obr, startvert+index[0]); - vlr->v2= RE_findOrAddVert(obr, startvert+index[1]); - vlr->v3= RE_findOrAddVert(obr, startvert+index[2]); + vlr->v1= RE_findOrAddVert(obr, startvert + v1); + vlr->v2= RE_findOrAddVert(obr, startvert + v2); + vlr->v3= RE_findOrAddVert(obr, startvert + v3); vlr->v4= NULL; - if (area_tri_v3(vlr->v3->co, vlr->v2->co, vlr->v1->co)>FLT_EPSILON10) { - normal_tri_v3(tmp, vlr->v3->co, vlr->v2->co, vlr->v1->co); + + /* to prevent float accuracy issues, we calculate normal in local object space (not world) */ + if (area_tri_v3(co3, co2, co1)>FLT_EPSILON10) { + normal_tri_v3(tmp, co3, co2, co1); add_v3_v3(n, tmp); } @@ -2906,6 +2918,8 @@ static void init_render_curve(Render *re, ObjectRen *obr, int timeoffset) vlr->ec= 0; } + /* transform normal to world space */ + mul_m4_v3(nmat, n); normalize_v3(n); /* vertex normals */ |