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always recenter transforms on rotate pivot

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This commit is contained in:
David Rose 2003-06-25 23:07:59 +00:00
parent 0cc3ed8706
commit a182469159
1 changed files with 48 additions and 61 deletions
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73
pandatool/src/mayaegg/mayaToEggConverter.cxx
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@ -670,47 +670,8 @@ get_transform(const MDagPath &dag_path, EggGroup *egg_group) {
return;
}
// A special case: if the group is a billboard, we center the
// transform on the rotate pivot and ignore whatever transform might
// be there.
if (egg_group->get_billboard_type() != EggGroup::BT_none) {
MFnTransform transform(transformNode, &status);
if (!status) {
status.perror("MFnTransform constructor");
return;
}
MPoint pivot = transform.rotatePivot(MSpace::kObject, &status);
if (!status) {
status.perror("Can't get rotate pivot");
return;
}
// We need to convert the pivot to world coordinates.
// Unfortunately, Maya can only tell it to us in local
// coordinates.
MMatrix mat = dag_path.inclusiveMatrix(&status);
if (!status) {
status.perror("Can't get coordinate space for pivot");
return;
}
LMatrix4d n2w(mat[0][0], mat[0][1], mat[0][2], mat[0][3],
mat[1][0], mat[1][1], mat[1][2], mat[1][3],
mat[2][0], mat[2][1], mat[2][2], mat[2][3],
mat[3][0], mat[3][1], mat[3][2], mat[3][3]);
LPoint3d p3d(pivot[0], pivot[1], pivot[2]);
p3d = p3d * n2w;
if (egg_group->get_parent() != (EggGroupNode *)NULL) {
// Now convert the pivot point into the group's parent's space.
p3d = p3d * egg_group->get_parent()->get_vertex_frame_inv();
}
egg_group->clear_transform();
egg_group->add_translate(p3d);
return;
}
// Billboards always get the transform set.
if (egg_group->get_billboard_type() == EggGroup::BT_none) {
switch (_transform_type) {
case TT_all:
break;
@ -732,9 +693,9 @@ get_transform(const MDagPath &dag_path, EggGroup *egg_group) {
case TT_invalid:
return;
}
}
// Extract the matrix from the dag path, and convert it to the local
// frame.
// Extract the matrix from the dag path.
MMatrix mat = dag_path.inclusiveMatrix(&status);
if (!status) {
status.perror("Can't get transform matrix");
@ -744,10 +705,36 @@ get_transform(const MDagPath &dag_path, EggGroup *egg_group) {
mat[1][0], mat[1][1], mat[1][2], mat[1][3],
mat[2][0], mat[2][1], mat[2][2], mat[2][3],
mat[3][0], mat[3][1], mat[3][2], mat[3][3]);
// Maya has a rotate pivot, separate from its transform. Usually we
// care more about the rotate pivot than we do about the transform,
// so get the rotate pivot too.
MFnTransform transform(transformNode, &status);
if (!status) {
status.perror("MFnTransform constructor");
return;
}
MPoint pivot = transform.rotatePivot(MSpace::kObject, &status);
if (!status) {
status.perror("Can't get rotate pivot");
return;
}
// We need to convert the pivot to world coordinates. (Maya can
// only tell it to us in local coordinates.)
LPoint3d p3d(pivot[0], pivot[1], pivot[2]);
p3d = p3d * m4d;
// Now recenter the matrix about the pivot point.
m4d.set_row(3, p3d);
// Convert the recentered matrix into the group's space and store
// it.
m4d = m4d * egg_group->get_node_frame_inv();
if (!m4d.almost_equal(LMatrix4d::ident_mat(), 0.0001)) {
egg_group->add_matrix(m4d);
}
return;
}
////////////////////////////////////////////////////////////////////