void SgMeshBase::updateBoundingBox()
{
if(!vertices_){
bbox.clear();
} else {
BoundingBoxf bboxf;
for(SgVertexArray::const_iterator p = vertices_->begin(); p != vertices_->end(); ++p){
bboxf.expandBy(*p);
}
bbox = bboxf;
}
}
void SgMesh::updateBoundingBox()
{
if(!USE_FACES_FOR_BOUNDING_BOX_CALCULATION){
SgMeshBase::updateBoundingBox();
} else {
if(!hasVertices()){
bbox.clear();
} else {
BoundingBoxf bboxf;
const SgVertexArray& v = *vertices();
for(SgIndexArray::const_iterator iter = triangleVertices_.begin(); iter != triangleVertices_.end(); ++iter){
const Vector3f& p = v[*iter];
bboxf.expandBy(p);
}
bbox = bboxf;
}
}
}
void SceneGraphViewImpl::renderMarker(GLSceneRenderer& renderer)
{
SgNode* node = 0;
SgTransform* trans = 0;
SgMeshBase* mesh = 0;
if(selectedSgvItem->markerNode){
node = selectedSgvItem->markerNode;
}else if(dynamic_cast<SgScaleTransform*>(selectedSgvItem->node) ||
dynamic_cast<SgPosTransform*>(selectedSgvItem->node)){
trans = dynamic_cast<SgTransform*>(selectedSgvItem->node);
}else{
mesh = dynamic_cast<SgMeshBase*>(selectedSgvItem->node);
if(!mesh)
node = dynamic_cast<SgNode*>(selectedSgvItem->node);
}
BoundingBoxf bb;
if(trans)
bb = trans->untransformedBoundingBox();
else if(mesh){
bb = mesh->boundingBox();
}else if(node){
bb = node->boundingBox();
}else
return;
if(bb.empty())
return;
glPushAttrib(GL_LIGHTING_BIT | GL_CURRENT_BIT);
glDisable(GL_LIGHTING);
glColor3f(1.0f, 0.0f, 1.0f);
glBegin(GL_LINES);
const Vector3f& min = bb.min();
const Vector3f& max = bb.max();
float y[2];
y[0] = min.y();
y[1] = max.y();
for(int i=0; i < 2; ++i){
glVertex3f(min.x(), y[i], min.z());
glVertex3f(min.x(), y[i], max.z());
glVertex3f(min.x(), y[i], max.z());
glVertex3f(max.x(), y[i], max.z());
glVertex3f(max.x(), y[i], max.z());
glVertex3f(max.x(), y[i], min.z());
glVertex3f(max.x(), y[i], min.z());
glVertex3f(min.x(), y[i], min.z());
}
float z[2];
z[0] = min.z();
z[1] = max.z();
for(int i=0; i < 2; ++i){
glVertex3f(min.x(), min.y(), z[i]);
glVertex3f(min.x(), max.y(), z[i]);
glVertex3f(max.x(), min.y(), z[i]);
glVertex3f(max.x(), max.y(), z[i]);
}
glEnd();
glPopAttrib();
}
BoundingBox::BoundingBox(const BoundingBoxf& org)
{
min_ = org.min().cast<Vector3::Scalar>();
max_ = org.max().cast<Vector3::Scalar>();
empty_ = org.empty();
}
void BoundingBoxf::expandBy(const BoundingBoxf& bbox)
{
if(!bbox.empty()){
if(bbox.min().x() < min_.x()){
min_.x() = bbox.min().x();
}
if(bbox.max().x() > max_.x()){
max_.x() = bbox.max().x();
}
if(bbox.min().y() < min_.y()){
min_.y() = bbox.min().y();
}
if(bbox.max().y() > max_.y()){
max_.y() = bbox.max().y();
}
if(bbox.min().z() < min_.z()){
min_.z() = bbox.min().z();
}
if(bbox.max().z() > max_.z()){
max_.z() = bbox.max().z();
}
if(empty_){
empty_ = (min_.x() >= max_.x()) && (min_.y() >= max_.y()) && (min_.z() >= max_.z());
}
}
}