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== Mirror Modifier & Subdivide ==

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Vertices that are newly created by a subdivision of a mesh object
with mirror modifiers (with clipping option set) are projected to
the plane of symmetry when they are created on edges that lie on
that plane.

For regular subdivide this is trivial by linearity, so this mainly
effects subdivide smooth, loopcut smooth, and subdivide fractal.
This commit basically prevents nasty seam rips on the mirror when
doing these operations.
This commit is contained in:
Chris Want
2008-01-25 23:21:22 +00:00
parent a4c8a5b670
commit 40413c9a4a
1 changed files with 42 additions and 1 deletions
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43
source/blender/src/editmesh_tools.c
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@@ -51,6 +51,7 @@ editmesh_tool.c: UI called tools for editmesh, geometry changes here, otherwise
#include "DNA_mesh_types.h"
#include "DNA_material_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_modifier_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
@@ -1283,6 +1284,19 @@ static EditVert *subdivide_edge_addvert(EditEdge *edge, float rad, int beauty, f
/* offset for smooth or sphere or fractal */
alter_co(co, edge, rad, beauty, percent);
/* clip if needed by mirror modifier */
if (edge->v1->f2) {
if ( edge->v1->f2 & edge->v2->f2 & 1) {
co[0]= 0.0f;
}
if ( edge->v1->f2 & edge->v2->f2 & 2) {
co[1]= 0.0f;
}
if ( edge->v1->f2 & edge->v2->f2 & 4) {
co[2]= 0.0f;
}
}
ev = addvertlist(co, NULL);
/* vert data (vgroups, ..) */
@@ -2403,12 +2417,39 @@ void esubdivideflag(int flag, float rad, int beauty, int numcuts, int seltype)
EditMesh *em = G.editMesh;
EditFace *ef;
EditEdge *eed, *cedge, *sort[4];
EditVert **templist;
EditVert *eve, **templist;
struct GHash *gh;
float length[4], v1mat[3], v2mat[3], v3mat[3], v4mat[3];
int i, j, edgecount, touchcount, facetype,hold;
ModifierData *md= G.obedit->modifiers.first;
if(multires_test()) return;
for (; md; md=md->next) {
if (md->type==eModifierType_Mirror) {
MirrorModifierData *mmd = (MirrorModifierData*) md;
if(mmd->flag & MOD_MIR_CLIPPING) {
for (eve= em->verts.first; eve; eve= eve->next) {
eve->f2= 0;
switch(mmd->axis){
case 0:
if (fabs(eve->co[0]) < mmd->tolerance)
eve->f2 |= 1;
break;
case 1:
if (fabs(eve->co[1]) < mmd->tolerance)
eve->f2 |= 2;
break;
case 2:
if (fabs(eve->co[2]) < mmd->tolerance)
eve->f2 |= 4;
break;
}
}
}
}
}
//Set faces f1 to 0 cause we need it later
for(ef=em->faces.first;ef;ef = ef->next) {