[Bf-committers] Align view to edge (rotate about edge)

[Stealth Apprentice]

An align view to face would be really handy for
projections (or does that functionality exist and I
missed it?)

--- Campbell Barton <cbarton at metavr.com> wrote:

> Hi, Hers a small addision to editmesh_mods.c that
> allows aligning teh 
> view to an edge. (2 verts) - see the last ~12 lines.
> It seems trivial, but at the moment there is no easy
> way to rotate 
> around an edge- with this- "Align to view" &
> "Constrain transform to 
> view" - could be used to rotate about en edge.
> Zr- do you own this module? - is it worth writing a
> patch?
> - Cam
> 
> ____________
> void editmesh_align_view_to_selected(View3D *v3d,
> int axis)
> {
>     EditMesh *em = G.editMesh;
>     int nselverts= EM_nvertices_selected();
> 
>     if (nselverts<2) {
>         if (nselverts==0) {
>             error("No faces or vertices selected.");
>         } else {
>             error("At least one face or three
> vertices must be selected.");
>         }
>     } else if (EM_nfaces_selected()) {
>         float norm[3];
>         EditFace *efa;
> 
>         norm[0]= norm[1]= norm[2]= 0.0;
>         for (efa= em->faces.first; efa; efa=
> efa->next) {
>             if (faceselectedAND(efa, SELECT)) {
>                 float fno[3];
>                 if (efa->v4)
> CalcNormFloat4(efa->v1->co, efa->v2->co, 
> efa->v3->co, efa->v4->co, fno);
>                 else CalcNormFloat(efa->v1->co,
> efa->v2->co, 
> efa->v3->co, fno);
>                         /* XXX, fixme, should be
> flipped intp a
>                          * consistent direction. -zr
>                          */
>                 norm[0]+= fno[0];
>                 norm[1]+= fno[1];
>                 norm[2]+= fno[2];
>             }
>         }
> 
>         Mat4Mul3Vecfl(G.obedit->obmat, norm);
>         view3d_align_axis_to_vector(v3d, axis,
> norm);
>     } else if (nselverts>2) {
>         float cent[3], norm[3];
>         EditVert *eve, *leve= NULL;
> 
>         norm[0]= norm[1]= norm[2]= 0.0;
>         editmesh_calc_selvert_center(cent);
>         for (eve= em->verts.first; eve; eve=
> eve->next) {
>             if (eve->f & SELECT) {
>                 if (leve) {
>                     float tno[3];
>                     CalcNormFloat(cent, leve->co,
> eve->co, tno);
>                    
>                         /* XXX, fixme, should be
> flipped intp a
>                          * consistent direction. -zr
>                          */
>                     norm[0]+= tno[0];
>                     norm[1]+= tno[1];
>                     norm[2]+= tno[2];
>                 }
>                 leve= eve;
>             }
>         }
> 
>         Mat4Mul3Vecfl(G.obedit->obmat, norm);
>         view3d_align_axis_to_vector(v3d, axis,
> norm);
>     } else { /* Align view to edge (or 2 verts) */
>         float norm[3];
>         EditVert *eve, *leve= NULL;
> 
>         norm[0]= norm[1]= norm[2]= 0.0;
>         for (eve= em->verts.first; eve; eve=
> eve->next) {
>             if (eve->f & SELECT) {
>                 if (leve) {
>                     norm[0]= leve->co[0] -
> eve->co[0];
>                     norm[1]= leve->co[1] -
> eve->co[1];
>                     norm[2]= leve->co[2] -
> eve->co[2];
>                 }
>                 leve= eve;
>             }
>         }
>         Mat4Mul3Vecfl(G.obedit->obmat, norm);
>         view3d_align_axis_to_vector(v3d, axis,
> norm);
>     }
> }
> 
> -- 
> Campbell J Barton
> 
> 133 Hope Street
> Geelong West, Victoria 3218 Australia
> 
> URL:    http://www.metavr.com
> e-mail: cbarton at metavr.com
> phone: AU (03) 5229 0241
> _______________________________________________
> Bf-committers mailing list
> Bf-committers at projects.blender.org
>
http://projects.blender.org/mailman/listinfo/bf-committers
> 


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