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==Mesh modeling==

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A modification of how 'Extrude Region' behaves on the line of
symmetry when a mirror modifier is used. If 'Do clipping' is
selected, and there is an edge selected on the line of symmetry
that is connected to a selected face, that edge no longer gets
extruded into a face lying on the symmetry line. In pictures,
here is how the old behavior compares to the new behavior:

http://bebop.cns.ualberta.ca/~cwant/mirror_extrude_region

I think this new behavior is consistent with what most users of
the mirror modifiers would want, but if not please say so!

Also: Test, test, test!
This commit is contained in:
Chris Want
2006-06-10 04:48:56 +00:00
parent ca7ce0cc0a
commit 012ea6265f
1 changed files with 71 additions and 0 deletions
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71
source/blender/src/editmesh_lib.c
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@@ -49,6 +49,7 @@ editmesh_lib: generic (no UI, no menus) operations/evaluators for editmesh data
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_modifier_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
@@ -941,6 +942,7 @@ static short extrudeflag_edge(short flag, float *nor)
EditEdge *eed, *nexted;
EditFace *efa, *nextfa;
short del_old= 0;
ModifierData *md= G.obedit->modifiers.first;
if(G.obedit==0 || get_mesh(G.obedit)==0) return 0;
@@ -993,6 +995,40 @@ static short extrudeflag_edge(short flag, float *nor)
}
}
/* If a mirror modifier with clipping is on, we need to adjust some
* of the cases above to handle edges on the line of symmetry.
*/
for (; md; md=md->next) {
if (md->type==eModifierType_Mirror) {
MirrorModifierData *mmd = (MirrorModifierData*) md;
if(mmd->flag & MOD_MIR_CLIPPING) {
for (eed= em->edges.first; eed; eed= eed->next) {
if(eed->f2 == 1) {
switch(mmd->axis){
case 0:
if ( (fabs(eed->v1->co[0]) < mmd->tolerance) &&
(fabs(eed->v2->co[0]) < mmd->tolerance) )
++eed->f2;
break;
case 1:
if ( (fabs(eed->v1->co[1]) < mmd->tolerance) &&
(fabs(eed->v2->co[1]) < mmd->tolerance) )
++eed->f2;
break;
case 2:
if ( (fabs(eed->v1->co[2]) < mmd->tolerance) &&
(fabs(eed->v2->co[2]) < mmd->tolerance) )
++eed->f2;
break;
}
}
}
}
}
}
set_edge_directions_f2(2);
/* step 1.5: if *one* selected face has edge with unselected face; remove old selected faces */
@@ -1141,6 +1177,7 @@ short extrudeflag_vert(short flag, float *nor)
EditEdge *eed, *e1, *e2, *e3, *e4, *nexted;
EditFace *efa, *efa2, *nextvl;
short sel=0, del_old= 0, is_face_sel=0;
ModifierData *md= G.obedit->modifiers.first;
if(G.obedit==0 || get_mesh(G.obedit)==0) return 0;
@@ -1225,6 +1262,40 @@ short extrudeflag_vert(short flag, float *nor)
efa->f1==1 : duplicate this face
*/
/* If a mirror modifier with clipping is on, we need to adjust some
* of the cases above to handle edges on the line of symmetry.
*/
for (; md; md=md->next) {
if (md->type==eModifierType_Mirror) {
MirrorModifierData *mmd = (MirrorModifierData*) md;
if(mmd->flag & MOD_MIR_CLIPPING) {
for (eed= em->edges.first; eed; eed= eed->next) {
if(eed->f2 == 2) {
switch(mmd->axis){
case 0:
if ( (fabs(eed->v1->co[0]) < mmd->tolerance) &&
(fabs(eed->v2->co[0]) < mmd->tolerance) )
++eed->f2;
break;
case 1:
if ( (fabs(eed->v1->co[1]) < mmd->tolerance) &&
(fabs(eed->v2->co[1]) < mmd->tolerance) )
++eed->f2;
break;
case 2:
if ( (fabs(eed->v1->co[2]) < mmd->tolerance) &&
(fabs(eed->v2->co[2]) < mmd->tolerance) )
++eed->f2;
break;
}
}
}
}
}
}
/* copy all selected vertices, */
/* write pointer to new vert in old struct at eve->tmp.v */
eve= em->verts.last;