private void UpdateAddMode(HEU_HoudiniAsset asset, int controlID, EventType eventType, Vector3 mousePosition, List<SerializedObject> updatedCurves)
{
Event currentEvent = Event.current;
Color defaultHandleColor = Handles.color;
switch (eventType)
{
case EventType.MouseDown:
{
if (!currentEvent.alt && currentEvent.button == 0 && _closestCurveName != null && _closestPointIndex >= 0)
{
AddPoint(_closestCurveName, _closestPointIndex, _newPointPosition, updatedCurves);
_closestCurveName = null;
currentEvent.Use();
}
break;
}
case EventType.MouseUp:
{
break;
}
case EventType.MouseMove:
{
// Use the mouse move event will force a repaint allowing for much more responsive UI
currentEvent.Use();
break;
}
case EventType.KeyUp:
{
if (currentEvent.keyCode == KeyCode.Space && !currentEvent.alt)
{
// Toggle modes
SwitchToMode(HEU_Curve.Interaction.EDIT);
}
else if (currentEvent.keyCode == KeyCode.Escape || currentEvent.keyCode == KeyCode.Return || currentEvent.keyCode == KeyCode.KeypadEnter)
{
SwitchToMode(HEU_Curve.Interaction.VIEW);
currentEvent.Use();
}
break;
}
case EventType.KeyDown:
{
if (currentEvent.keyCode == KeyCode.Backspace || currentEvent.keyCode == KeyCode.Delete)
{
// Delete last added point
if (_latestPointAddedCurve != null)
{
HEU_Curve latestAddCurve = GetCurve(_latestPointAddedCurve);
if (latestAddCurve != null && _latestPointsAdded.Count > 0)
{
SelectSinglePoint(latestAddCurve, _latestPointsAdded.Pop());
DeleteSelectedPoints(updatedCurves);
}
}
currentEvent.Use();
}
else if (currentEvent.keyCode == KeyCode.A)
{
int mode = (int)_newPointMode + 1;
if (mode > (int)CurveNewPointMode.END)
{
mode = (int)CurveNewPointMode.START;
}
_newPointMode = (CurveNewPointMode)mode;
}
else if (currentEvent.keyCode == KeyCode.F1)
{
_showInfo = !_showInfo;
}
break;
}
case EventType.Layout:
{
// This disables deselection on asset while in Add mode
HandleUtility.AddDefaultControl(GUIUtility.GetControlID(FocusType.Passive));
break;
}
case EventType.Repaint:
{
bool bMouseInDrawArea = HEU_GeneralUtility.IsMouseWithinSceneView(_currentCamera, mousePosition)
&& !HEU_GeneralUtility.IsMouseOverRect(_currentCamera, mousePosition, ref _curveEditorUIRect)
&& (!_showInfoRepaint || !HEU_GeneralUtility.IsMouseOverRect(_currentCamera, mousePosition, ref _infoRect));
// Plane for default collider
Plane collisionPlane = new Plane(Vector3.up, Vector3.zero);
//Ray mouseRay = _currentCamera.ScreenPointToRay(mousePosition);
//Vector3 planePosition = mouseRay.origin + mouseRay.direction * 100f;
//Plane collisionPlane = new Plane(-_currentCamera.transform.forward, planePosition);
HEU_Curve.CurveDrawCollision drawCollision = asset.CurveDrawCollision;
List<Collider> drawColliders = null;
LayerMask drawLayerMask = Physics.DefaultRaycastLayers;
if (drawCollision == HEU_Curve.CurveDrawCollision.LAYERMASK)
{
drawLayerMask = asset.GetCurveDrawLayerMask();
}
else if (drawCollision == HEU_Curve.CurveDrawCollision.COLLIDERS)
{
drawColliders = asset.GetCurveDrawColliders();
}
// Adding new point between line segments
_closestPointIndex = -1;
_closestCurveName = null;
_newPointPosition = Vector3.zero;
float closestDistance = float.MaxValue;
foreach (HEU_Curve curve in _curves)
{
// Draw the cooked curve using its vertices
DrawCurveUsingVertices(curve, _selectedCurveColor);
DrawPointCaps(curve, _addModeDefaultPointColor);
List<Vector3> points = curve.GetAllPoints();
int numPoints = points.Count;
if (_currentCamera != null && bMouseInDrawArea)
{
Ray ray = _currentCamera.ScreenPointToRay(mousePosition);
RaycastHit[] results = null;
if (numPoints > 0 && (_newPointMode == CurveNewPointMode.INSIDE))
{
// Control -> add point between closest line segment
for (int i = 0; i < numPoints - 1; ++i)
{
Vector3 pointPos0 = curve.GetTransformedPosition(points[i]);
Vector3 pointPos1 = curve.GetTransformedPosition(points[i + 1]);
Vector3 screenPos0 = HEU_EditorUI.GetHandleWorldToScreenPosition(pointPos0, _currentCamera);
Vector3 screenPos1 = HEU_EditorUI.GetHandleWorldToScreenPosition(pointPos1, _currentCamera);
float distance = HandleUtility.DistancePointToLineSegment(mousePosition, screenPos0, screenPos1);
if (distance < closestDistance)
{
closestDistance = distance;
_closestPointIndex = i + 1;
_closestCurveName = curve.CurveName;
}
}
}
else
{
// Show new point from either end of curve, whichever is closest.
// Use collision to find new point.
Vector3 hitPoint = Vector3.zero;
bool bHit = false;
if (drawCollision == HEU_Curve.CurveDrawCollision.LAYERMASK)
{
// Using layermask
RaycastHit hitInfo;
if (Physics.Raycast(ray, out hitInfo, _rayCastMaxDistance, drawLayerMask))
{
hitPoint = hitInfo.point;
bHit = true;
}
}
else if (drawColliders != null && drawColliders.Count > 0)
{
// Using colliders
results = Physics.RaycastAll(ray, _rayCastMaxDistance, drawLayerMask);
foreach (RaycastHit hit in results)
{
foreach (Collider drawCollider in drawColliders)
{
if (hit.collider == drawCollider)
{
hitPoint = hit.point;
bHit = true;
break;
}
}
}
}
else
{
// Using identity plane
float collisionEnter = 0f;
if (collisionPlane.Raycast(ray, out collisionEnter))
{
collisionEnter = Mathf.Clamp(collisionEnter, _currentCamera.nearClipPlane, _currentCamera.farClipPlane);
hitPoint = ray.origin + ray.direction * collisionEnter;
bHit = true;
}
}
if (bHit)
{
Vector3 hitPointScreenPosition = HEU_EditorUI.GetHandleWorldToScreenPosition(hitPoint, _currentCamera);
// Find the closest point to add from (either first or last point)
// Empty curve:
// If its just a single curve, we can use the hit point as closest point.
// For multiple curves, it gets trickier since we don't have an existing point
// to check for closest point. So we'll just use the parent's transform position
// as our anchor point.
Vector3 checkPoint = Vector3.zero;
int curveClosestPointIndex = 0;
if (numPoints == 0)
{
if (_curves.Count > 1)
{
// Multiple curves -> use position of asset
checkPoint = curve._targetGameObject.transform.position;
}
else
{
// Single curve -> use hit point as closest
checkPoint = hitPoint;
}
}
else if (_newPointMode == CurveNewPointMode.START)
{
// Curve with at least 1 point + shift held -> use first point
checkPoint = HEU_EditorUI.GetHandleWorldToScreenPosition(curve.GetTransformedPoint(0), _currentCamera);
curveClosestPointIndex = 0;
}
else
{
// Curve with at least 1 point -> use last point
checkPoint = HEU_EditorUI.GetHandleWorldToScreenPosition(curve.GetTransformedPoint(numPoints - 1), _currentCamera);
curveClosestPointIndex = numPoints;
}
float curveClosestPointDistance = Vector3.Distance(checkPoint, hitPointScreenPosition);
if (curveClosestPointDistance < closestDistance)
{
closestDistance = curveClosestPointDistance;
_closestPointIndex = curveClosestPointIndex;
_closestCurveName = curve.CurveName;
_newPointPosition = hitPoint;
}
// Snap to grid
_newPointPosition = HEU_EditorUI.GetSnapPosition(_newPointPosition);
}
}
}
}
// Note that curve name can be empty for valid empty curves
if (_closestCurveName != null && _closestPointIndex >= 0)
{
HEU_Curve closestCurve = GetCurve(_closestCurveName);
if (closestCurve != null)
{
int numPoints = closestCurve.GetNumPoints();
if ((_newPointMode == CurveNewPointMode.INSIDE) && !currentEvent.alt && numPoints >= 2)
{
// Handle adding new point at projected mouse cursor between points
// First draw the curve line segments
DrawCurveUsingPoints(closestCurve, Color.yellow);
// Draw the caps again to hid the ends of line segments above (visually pleasing)
DrawPointCaps(closestCurve, _addModeDefaultPointColor);
Vector3 pointPos0 = closestCurve.GetTransformedPoint(_closestPointIndex - 1);
Vector3 pointPos1 = closestCurve.GetTransformedPoint(_closestPointIndex);
Vector3 screenPos0 = HEU_EditorUI.GetHandleWorldToScreenPosition(pointPos0, _currentCamera);
Vector3 screenPos1 = HEU_EditorUI.GetHandleWorldToScreenPosition(pointPos1, _currentCamera);
Vector3 curveNewPointPosition = HandleUtility.ProjectPointLine(mousePosition, screenPos0, screenPos1);
Vector2 deltaNew = curveNewPointPosition - screenPos0;
Vector2 deltaLine = screenPos1 - screenPos0;
float ratio = Mathf.Clamp01(deltaNew.magnitude / deltaLine.magnitude);
Vector3 newDir = (pointPos1 - pointPos0);
curveNewPointPosition = pointPos0 + (newDir.normalized * newDir.magnitude * ratio);
Handles.color = _selectedPointColor;
HEU_EditorUI.DrawSphereCap(GUIUtility.GetControlID(FocusType.Passive), curveNewPointPosition, Quaternion.identity, HEU_EditorUI.GetHandleSize(curveNewPointPosition));
Handles.color = Color.yellow;
HEU_EditorUI.DrawCircleCap(0, pointPos0, Quaternion.LookRotation(_currentCamera.transform.forward), HEU_EditorUI.GetHandleSize(pointPos0));
HEU_EditorUI.DrawCircleCap(0, pointPos1, Quaternion.LookRotation(_currentCamera.transform.forward), HEU_EditorUI.GetHandleSize(pointPos1));
Handles.color = defaultHandleColor;
_newPointPosition = curveNewPointPosition;
SceneView.RepaintAll();
}
else if (!currentEvent.alt)
{
// Handle adding new point at closest curve's end points
if (closestCurve.GetNumPoints() > 0)
{
// Draw dotted line from last point to newPointPosition
int connectionPoint = (_closestPointIndex > 0) ? _closestPointIndex - 1 : 0;
Vector3 pointPos0 = closestCurve.GetTransformedPoint(connectionPoint);
Vector3[] dottedLineSegments = new Vector3[] { pointPos0, _newPointPosition };
Handles.color = _dottedLineColor;
Handles.DrawDottedLines(dottedLineSegments, 4f);
}
Handles.color = _selectedPointColor;
HEU_EditorUI.DrawSphereCap(GUIUtility.GetControlID(FocusType.Passive), _newPointPosition, Quaternion.identity, HEU_EditorUI.GetHandleSize(_newPointPosition));
Handles.color = defaultHandleColor;
SceneView.RepaintAll();
}
}
}
break;
}
}
}