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When you add new face with F key, then blender set up smoothness due to

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smoothness of faces in neighbourhood. It tries to set up normal of new
 face due to normals of faces in neigbourhood too.

 btw: this coding was inspired by andy's tutorial at conf in Amsterdam.
This commit is contained in:
Jiri Hnidek 2005-10-27 15:19:57 +00:00
parent e1047fe69a
commit 8fc7950455
1 changed files with 97 additions and 2 deletions
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99
source/blender/src/editmesh_add.c
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@ -446,6 +446,99 @@ static EditFace *exist_face_overlaps(EditVert *v1, EditVert *v2, EditVert *v3, E
return NULL;
}
/* will be new face smooth or solid? depends on smoothness of face neighbours
* of new face, if function return 1, then new face will be smooth, when functio
* will return zero, then new face will be solid */
static void fix_new_face(EditFace *eface)
{
struct EditMesh *em = G.editMesh;
struct EditFace *efa;
struct EditEdge *eed=NULL;
struct EditVert *v1 = eface->v1, *v2 = eface->v2, *v3 = eface->v3, *v4 = eface->v4;
struct EditVert *ev1=NULL, *ev2=NULL;
short smooth=0; /* "total smoothnes" of faces in neighbourhood */
short coef; /* "weight" of smoothness */
short count=0; /* number of edges with same direction as edit_face */
short vi[2][2]; /* vertex indexes */
efa = em->faces.first;
while(efa) {
coef = 0;
if(efa->v1==v1 || efa->v2==v1 || efa->v3==v1 || efa->v4==v1) {
ev1 = v1;
coef++;
}
if(efa->v1==v2 || efa->v2==v2 || efa->v3==v2 || efa->v4==v2) {
if(ev1) ev2 = v2;
else ev1 = v2;
coef++;
}
if(efa->v1==v3 || efa->v2==v3 || efa->v3==v3 || efa->v4==v3) {
if(coef<2) {
if(ev1) ev2 = v3;
else ev1 = v3;
}
coef++;
}
if((v4) && (efa->v1==v4 || efa->v2==v4 || efa->v3==v4 || efa->v4==v4)) {
if(ev1 && coef<2) ev2 = v4;
coef++;
}
/* "democracy" of smoothness */
if(efa->flag & ME_SMOOTH)
smooth += coef;
else
smooth -= coef;
if((ev1) && (ev2) && (ev1!=ev2)) eed = findedgelist(ev1, ev2);
/* has bordering edge of efa same direction as edge of edit_face ? */
if(eed) {
if(eed->v1==v1) vi[0][0] = 1;
else if(eed->v1==v2) vi[0][0] = 2;
else if(eed->v1==v3) vi[0][0] = 3;
else if(eed->v1==v4) vi[0][0] = 0;
if(eed->v2==v1) vi[0][1] = 1;
else if(eed->v2==v2) vi[0][1] = 2;
else if(eed->v2==v3) vi[0][1] = 3;
else if(eed->v2==v4) vi[0][1] = 4;
if(eed->v1==efa->v1) vi[1][0] = 1;
else if(eed->v1==efa->v2) vi[1][0] = 2;
else if(eed->v1==efa->v3) vi[1][0] = 3;
else if(eed->v1==efa->v4) vi[1][0] = 0;
if(eed->v2==efa->v1) vi[1][1] = 1;
else if(eed->v2==efa->v2) vi[1][1] = 2;
else if(eed->v2==efa->v3) vi[1][1] = 3;
else if(eed->v2==efa->v4) vi[1][1] = 4;
if((vi[0][0]>vi[0][1]) && (vi[1][0]>vi[1][1])) count++;
else if((vi[0][0]<vi[0][1]) && (vi[1][0]<vi[1][1])) count++;
}
efa = efa->next;
}
/* set up smoothness according voting of face in neighbourhood */
if(smooth >= 0)
eface->flag |= ME_SMOOTH;
else
eface->flag &= ~ME_SMOOTH;
/* set up order of vertexes and edges according "face normals" in neighbourhood */
if(v4 && count>=2) {
printf("\tflip QUAT\n");
flipface(eface);
}
else if(count>1) {
printf("\tflip TRIANGLE\n");
flipface(eface);
}
}
void addedgeface_mesh(void)
{
@ -471,6 +564,7 @@ void addedgeface_mesh(void)
neweve[amount-1]= eve;
}
}
if(amount==2) {
eed= addedgelist(neweve[0], neweve[1], NULL);
EM_select_edge(eed, 1);
@ -494,7 +588,6 @@ void addedgeface_mesh(void)
if(amount==3) {
if(exist_face_overlaps(neweve[0], neweve[1], neweve[2], NULL)==0) {
efa= addfacelist(neweve[0], neweve[1], neweve[2], 0, NULL, NULL);
EM_select_face(efa, 1);
}
@ -513,7 +606,6 @@ void addedgeface_mesh(void)
if(tria==2) join_triangles();
else if(exist_face_overlaps(neweve[0], neweve[1], neweve[2], neweve[3])==0) {
/* if 4 edges exist, we just create the face, convex or not */
efa= addface_from_edges();
if(efa==NULL) {
@ -545,6 +637,9 @@ void addedgeface_mesh(void)
inp= efa->n[0]*G.vd->viewmat[0][2] + efa->n[1]*G.vd->viewmat[1][2] + efa->n[2]*G.vd->viewmat[2][2];
if(inp < 0.0) flipface(efa);
fix_new_face(efa);
BIF_undo_push("Add face");
}