void CurveCreateTool::PickPosition(int x, int y, Vector3 &position)
{
FrustumLinePickVisitor pick (m_Scene->GetViewport()->GetCamera(), x, y);
// pick in the world
m_PickWorld.Raise( PickArgs( &pick ) );
bool set = false;
if (s_SurfaceSnap || s_ObjectSnap)
{
V_PickHitSmartPtr sorted;
PickHit::Sort(m_Scene->GetViewport()->GetCamera(), pick.GetHits(), sorted, PickSortTypes::Intersection);
V_PickHitSmartPtr::const_iterator itr = sorted.begin();
V_PickHitSmartPtr::const_iterator end = sorted.end();
for ( ; itr != end; ++itr )
{
// don't snap if we are surface snapping with no normal
if ( s_SurfaceSnap && !(*itr)->HasNormal() )
{
continue;
}
if ( (*itr)->GetHitObject() != m_Instance )
{
SceneGraph::HierarchyNode* node = Reflect::SafeCast<SceneGraph::HierarchyNode>( (*itr)->GetHitObject() );
if ( s_ObjectSnap )
{
Vector4 v = node->GetTransform()->GetGlobalTransform().t;
position.x = v.x;
position.y = v.y;
position.z = v.z;
}
else
{
position = (*itr)->GetIntersection();
}
set = true;
break;
}
}
}
if (!set)
{
// place the object on the camera plane
m_Scene->GetViewport()->GetCamera()->ViewportToPlaneVertex( (float32_t)x, (float32_t)y, SceneGraph::CreateTool::s_PlaneSnap, position);
}
}
bool CurveEditTool::MouseDown( const MouseButtonInput& e )
{
bool success = true;
if ( GetEditMode() == CurveEditModes::Modify )
{
success = m_ControlPointManipulator->MouseDown( e );
}
else
{
Curve* curve = NULL;
{
FrustumLinePickVisitor pick (m_Scene->GetViewport()->GetCamera(), e.GetPosition().x, e.GetPosition().y);
m_Scene->Pick( &pick );
V_PickHitSmartPtr sorted;
PickHit::Sort(m_Scene->GetViewport()->GetCamera(), pick.GetHits(), sorted, PickSortTypes::Intersection);
for ( V_PickHitSmartPtr::const_iterator itr = sorted.begin(), end = sorted.end(); itr != end; ++itr )
{
if ( curve = Reflect::SafeCast<Curve>( (*itr)->GetHitObject() ) )
{
break;
}
}
}
if ( !curve || !m_Scene->IsEditable() )
{
return false;
}
LinePickVisitor pick (m_Scene->GetViewport()->GetCamera(), e.GetPosition().x, e.GetPosition().y);
switch ( GetEditMode() )
{
case CurveEditModes::Insert:
{
std::pair<uint32_t, uint32_t> points;
if ( !curve->ClosestControlPoints( &pick, points ) )
{
return false;
}
CurveControlPoint* p0 = curve->GetControlPointByIndex( points.first );
CurveControlPoint* p1 = curve->GetControlPointByIndex( points.second );
Vector3 a( p0->GetPosition() );
Vector3 b( p1->GetPosition() );
Vector3 p;
if ( curve->GetCurveType() == CurveType::Linear )
{
float mu;
if ( !pick.GetPickSpaceLine().IntersectsSegment( a, b, -1.0f, &mu ) )
{
return false;
}
p = a * ( 1.0f - mu ) + b * mu;
}
else
{
p = ( a + b ) * 0.5f;
}
uint32_t index = points.first > points.second ? points.first : points.second;
CurveControlPointPtr point = new CurveControlPoint();
point->SetOwner( curve->GetOwner() );
point->Initialize();
curve->GetOwner()->Push( curve->InsertControlPointAtIndex( index, point ) );
break;
}
case CurveEditModes::Remove:
{
int32_t index = curve->ClosestControlPoint( &pick );
if ( index < 0 )
{
return false;
}
curve->GetOwner()->Push( curve->RemoveControlPointAtIndex( index ) );
break;
}
}
curve->Dirty();
m_Scene->Execute( false );
}
return success || Base::MouseDown( e );
}
void PickHit::Sort(Editor::Camera* camera, const V_PickHitSmartPtr& hits, V_PickHitSmartPtr& sorted, PickSortType sortType)
{
// early out if we have no hits
if (hits.empty())
return;
// get our camera distance
Vector3 cameraPosition;
camera->GetPosition(cameraPosition);
V_SortKey sortKeys;
// for each hit object
for ( V_PickHitSmartPtr::const_iterator itr = hits.begin(), end = hits.end(); itr != end; ++itr )
{
PickHitPtr hit = *itr;
Vector3 intersection;
float32_t pickDistance;
switch (sortType)
{
case PickSortTypes::Intersection:
case PickSortTypes::Surface:
{
if (!hit->HasIntersection())
{
continue;
}
intersection = hit->GetIntersection();
pickDistance = hit->GetIntersectionDistance();
break;
}
case PickSortTypes::Vertex:
{
if (!hit->HasVertex())
{
continue;
}
intersection = hit->GetVertex();
pickDistance = hit->GetVertexDistance();
break;
}
}
float32_t cameraDistance = (cameraPosition - intersection).LengthSquared();
sortKeys.push_back( SortKey (hit, cameraDistance, pickDistance) );
}
switch ( sortType )
{
case PickSortTypes::Intersection:
{
std::sort( sortKeys.begin(), sortKeys.end(), &CompareCameraDistance );
break;
}
case PickSortTypes::Surface:
{
std::sort( sortKeys.begin(), sortKeys.end(), &ComparePickDistanceThenCameraDistance );
break;
}
case PickSortTypes::Vertex:
{
std::sort( sortKeys.begin(), sortKeys.end(), &ComparePickDistance );
break;
}
default:
{
HELIUM_BREAK();
break;
}
}
// clear
sorted.clear();
// reserve data for our result
sorted.reserve(sortKeys.size());
// dump
V_SortKey::const_iterator itr = sortKeys.begin();
V_SortKey::const_iterator end = sortKeys.end();
for( ;itr != end; ++itr )
{
sorted.push_back(itr->m_Hit);
}
}
bool CreateTool::DetermineTranslationAndNormal( PickVisitor& pick, Vector3& t, Vector3& n )
{
// pick in the world
PickArgs args ( &pick );
m_PickWorld.Raise( args );
bool set = false;
if ( s_SurfaceSnap || s_ObjectSnap )
{
// process results
V_PickHitSmartPtr sorted;
PickHit::Sort( m_Scene->GetViewport()->GetCamera(), pick.GetHits(), sorted, PickSortTypes::Intersection );
V_PickHitSmartPtr::const_iterator itr = sorted.begin();
V_PickHitSmartPtr::const_iterator end = sorted.end();
for ( ; itr != end; ++itr )
{
Editor::HierarchyNode* node = Reflect::SafeCast<Editor::HierarchyNode>( (*itr)->GetHitObject() );
// don't snap against what we are placing
if ( node == m_Instance )
{
continue;
}
// eliminate nodes that are not live when we are live snapping
if ( s_LiveObjectsOnly && !node->IsLive() )
{
continue;
}
// don't snap if we are surface snapping with no normal
if ( s_SurfaceSnap && !(*itr)->HasNormal() )
{
continue;
}
// don't snap if we don't have an intersection
if ( !(*itr)->HasIntersection() )
{
continue;
}
if ( s_ObjectSnap )
{
Vector4 v = node->GetTransform()->GetGlobalTransform().t;
t.x = v.x;
t.y = v.y;
t.z = v.z;
set = true;
}
else
{
t = (*itr)->GetIntersection();
}
if ( s_NormalSnap && (*itr)->HasNormal() )
{
n = (*itr)->GetNormal();
}
set = true;
break;
}
}
return set;
}