protected override void OnDragOver(DragEventArgs drgevent)
{
base.OnDragOver(drgevent);
if (DesignView.Context == null ||
m_ghosts.Count == 0)
{
return;
}
Point clientPoint = PointToClient(new Point(drgevent.X, drgevent.Y));
Ray3F rayw = GetWorldRay(clientPoint);
bool shiftPressed = Control.ModifierKeys == Keys.Shift;
DomNode hitnode = null;
HitRecord?hit = null;
if (shiftPressed)
{
Matrix4F v = Camera.ViewMatrix;
Matrix4F p = Camera.ProjectionMatrix;
HitRecord[] hits = GameEngine.RayPick(v, p, rayw, false);
foreach (HitRecord ht in hits)
{
hitnode = GameEngine.GetAdapterFromId(ht.instanceId).Cast <DomNode>();
bool skip = false;
// ignore ghosts
foreach (DomNode node in m_ghosts)
{
if (hitnode == node || hitnode.IsDescendantOf(node))
{
skip = true;
break;
}
}
if (skip)
{
continue;
}
hit = ht;
break;
}
}
ISnapFilter snapFilter = Globals.MEFContainer.GetExportedValue <ISnapFilter>();
bool snap = (shiftPressed && hit.HasValue);
foreach (DomNode ghost in m_ghosts)
{
HitRecord?hr = (snap && (snapFilter == null || snapFilter.CanSnapTo(ghost, hitnode))) ? hit : null;
ProjectGhost(ghost, rayw, hr);
}
GameLoop.Update();
GameLoop.Render();
}
public override void OnDragging(ViewControl vc, Point scrPt)
{
if (m_cancelDrag || m_hitRegion == HitRegion.None || NodeList.Count == 0)
{
return;
}
bool hitAxis = m_hitRegion == HitRegion.XAxis ||
m_hitRegion == HitRegion.YAxis ||
m_hitRegion == HitRegion.ZAxis;
Matrix4F view = vc.Camera.ViewMatrix;
Matrix4F proj = vc.Camera.ProjectionMatrix;
Matrix4F vp = view * proj;
// create ray in world space.
Ray3F rayW = vc.GetRay(scrPt, vp);
// create ray in view space.
Ray3F rayV = vc.GetRay(scrPt, proj);
Vec3F translate = m_translatorControl.OnDragging(rayV);
ISnapSettings snapSettings = (ISnapSettings)DesignView;
bool snapToGeom = Control.ModifierKeys == m_snapGeometryKey;
if (snapToGeom)
{
Vec3F manipPos = HitMatrix.Translation;
Vec3F manipMove;
if (hitAxis)
{
//Make rayw to point toward moving axis and starting
// from manipulator’s world position.
rayW.Direction = Vec3F.Normalize(translate);
rayW.Origin = manipPos;
manipMove = Vec3F.ZeroVector;
m_cancelDrag = true; //stop further snap-to's
}
else
{
manipMove = rayW.ProjectPoint(manipPos) - manipPos;
}
for (int i = 0; i < NodeList.Count; i++)
{
ITransformable node = NodeList[i];
Vec3F snapOffset = TransformUtils.CalcSnapFromOffset(node, snapSettings.SnapFrom);
Path <DomNode> path = new Path <DomNode>(Adapters.Cast <DomNode>(node).GetPath());
Matrix4F parentLocalToWorld = TransformUtils.CalcPathTransform(path, path.Count - 2);
Vec3F orgPosW;
parentLocalToWorld.Transform(m_originalValues[i], out orgPosW);
Matrix4F parentWorldToLocal = new Matrix4F();
parentWorldToLocal.Invert(parentLocalToWorld);
rayW.MoveToIncludePoint(orgPosW + snapOffset + manipMove);
HitRecord[] hits = GameEngine.RayPick(view, proj, rayW, true);
bool cansnap = false;
HitRecord target = new HitRecord();
if (hits.Length > 0)
{
// find hit record.
foreach (var hit in hits)
{
if (m_snapFilter.CanSnapTo(node, GameEngine.GetAdapterFromId(hit.instanceId)))
{
target = hit;
cansnap = true;
break;
}
}
}
if (cansnap)
{
Vec3F pos;
if (target.hasNearestVert && snapSettings.SnapVertex)
{
pos = target.nearestVertex;
}
else
{
pos = target.hitPt;
}
pos -= snapOffset;
parentWorldToLocal.Transform(ref pos);
Vec3F diff = pos - node.Transform.Translation;
node.Translation += diff;
bool rotateOnSnap = snapSettings.RotateOnSnap &&
target.hasNormal &&
(node.TransformationType & TransformationTypes.Rotation) != 0;
if (rotateOnSnap)
{
Vec3F localSurfaceNormal;
parentWorldToLocal.TransformNormal(target.normal, out localSurfaceNormal);
node.Rotation = TransformUtils.RotateToVector(
m_originalRotations[i],
localSurfaceNormal,
AxisSystemType.YIsUp);
}
}
}
}
else
{
IGrid grid = DesignView.Context.Cast <IGame>().Grid;
bool snapToGrid = Control.ModifierKeys == m_snapGridKey &&
grid.Visible &&
vc.Camera.ViewType == ViewTypes.Perspective;
float gridHeight = grid.Height;
// translate.
for (int i = 0; i < NodeList.Count; i++)
{
ITransformable node = NodeList[i];
Path <DomNode> path = new Path <DomNode>(Adapters.Cast <DomNode>(node).GetPath());
Matrix4F parentLocalToWorld = TransformUtils.CalcPathTransform(path, path.Count - 2);
Matrix4F parentWorldToLocal = new Matrix4F();
parentWorldToLocal.Invert(parentLocalToWorld);
Vec3F localTranslation;
parentWorldToLocal.TransformVector(translate, out localTranslation);
Vec3F trans = m_originalValues[i] + localTranslation;
if (snapToGrid)
{
if (grid.Snap)
{
trans = grid.SnapPoint(trans);
}
else
{
trans.Y = gridHeight;
}
}
node.Translation = trans;
}
}
}
protected override IList <object> Pick(MouseEventArgs e)
{
bool multiSelect = DragOverThreshold;
List <object> paths = new List <object>();
HitRecord[] hits;
if (multiSelect)
{// frustum pick
RectangleF rect = MakeRect(FirstMousePoint, CurrentMousePoint);
hits = GameEngine.FrustumPick(SurfaceId, Camera.ViewMatrix, Camera.ProjectionMatrix, rect);
}
else
{// ray pick
Ray3F rayW = GetWorldRay(CurrentMousePoint);
hits = GameEngine.RayPick(Camera.ViewMatrix, Camera.ProjectionMatrix, rayW, false);
}
// create unique list of hits
HashSet <ulong> instanceSet = new HashSet <ulong>();
List <HitRecord> uniqueHits = new List <HitRecord>();
// build 'path' objects for each hit record.
foreach (HitRecord hit in hits)
{
bool added = instanceSet.Add(hit.instanceId);
if (added)
{
uniqueHits.Add(hit);
}
}
HitRecord firstHit = new HitRecord();
// build 'path' objects for each hit record.
foreach (HitRecord hit in uniqueHits)
{
NativeObjectAdapter nobj = GameEngine.GetAdapterFromId(hit.instanceId);
DomNode dom = nobj.DomNode;
object hitPath = Util.AdaptDomPath(dom);
object obj = DesignView.PickFilter.Filter(hitPath, e);
if (obj != null)
{
if (paths.Count == 0)
{
firstHit = hit;
}
var newPath = obj as AdaptablePath <object> ?? Util.AdaptDomPath((DomNode)obj);
paths.Add(newPath);
}
}
if (multiSelect == false && paths.Count > 0)
{
var path = paths[0];
ISelectionContext selection = DesignView.Context.As <ISelectionContext>();
ILinear linear = path.As <ILinear>();
if (linear != null &&
Control.ModifierKeys == System.Windows.Forms.Keys.Shift &&
selection.SelectionContains(path))
{
ITransactionContext trans = DesignView.Context.As <ITransactionContext>();
trans.DoTransaction(
delegate
{
linear.InsertPoint(firstHit.index, firstHit.hitPt.X, firstHit.hitPt.Y, firstHit.hitPt.Z);
}, "insert control point".Localize()
);
}
}
return(paths);
}