void DrawHandle(int i)
{
Vector3 handlePosition = MathUtility.TransformPoint(bezierPath[i], creator.transform, bezierPath.Space);
float anchorHandleSize = GetHandleDiameter(globalDisplaySettings.anchorSize * data.bezierHandleScale, bezierPath[i]);
float controlHandleSize = GetHandleDiameter(globalDisplaySettings.controlSize * data.bezierHandleScale, bezierPath[i]);
bool isAnchorPoint = i % 3 == 0;
bool isInteractive = isAnchorPoint || bezierPath.ControlPointMode != BezierPath.ControlMode.Automatic;
float handleSize = (isAnchorPoint) ? anchorHandleSize : controlHandleSize;
bool doTransformHandle = i == handleIndexToDisplayAsTransform;
PathHandle.HandleColours handleColours = (isAnchorPoint) ? splineAnchorColours : splineControlColours;
if (i == handleIndexToDisplayAsTransform)
{
handleColours.defaultColour = (isAnchorPoint) ? globalDisplaySettings.anchorSelected : globalDisplaySettings.controlSelected;
}
var cap = capFunctions[(isAnchorPoint) ? globalDisplaySettings.anchorShape : globalDisplaySettings.controlShape];
PathHandle.HandleInputType handleInputType;
handlePosition = PathHandle.DrawHandle(handlePosition, bezierPath.Space, isInteractive, handleSize, cap, handleColours, out handleInputType, i);
if (doTransformHandle)
{
// Show normals rotate tool
if (data.showNormals && Tools.current == Tool.Rotate && isAnchorPoint && bezierPath.Space == PathSpace.xyz)
{
Handles.color = handlesStartCol;
int attachedControlIndex = (i == bezierPath.NumPoints - 1) ? i - 1 : i + 1;
Vector3 dir = (bezierPath[attachedControlIndex] - handlePosition).normalized;
float handleRotOffset = (360 + bezierPath.GlobalNormalsAngle) % 360;
anchorAngleHandle.radius = handleSize * 3;
anchorAngleHandle.angle = handleRotOffset + bezierPath.GetAnchorNormalAngle(i / 3);
Vector3 handleDirection = Vector3.Cross(dir, Vector3.up);
Matrix4x4 handleMatrix = Matrix4x4.TRS(
handlePosition,
Quaternion.LookRotation(handleDirection, dir),
Vector3.one
);
using (new Handles.DrawingScope(handleMatrix)) {
// draw the handle
EditorGUI.BeginChangeCheck();
anchorAngleHandle.DrawHandle();
if (EditorGUI.EndChangeCheck())
{
Undo.RecordObject(creator, "Set angle");
bezierPath.SetAnchorNormalAngle(i / 3, anchorAngleHandle.angle - handleRotOffset);
}
}
}
else
{
handlePosition = Handles.DoPositionHandle(handlePosition, Quaternion.identity);
}
}
switch (handleInputType)
{
case PathHandle.HandleInputType.LMBDrag:
draggingHandleIndex = i;
handleIndexToDisplayAsTransform = -1;
Repaint();
break;
case PathHandle.HandleInputType.LMBRelease:
draggingHandleIndex = -1;
handleIndexToDisplayAsTransform = -1;
Repaint();
break;
case PathHandle.HandleInputType.LMBClick:
draggingHandleIndex = -1;
if (Event.current.shift)
{
handleIndexToDisplayAsTransform = -1; // disable move tool if new point added
}
else
{
if (handleIndexToDisplayAsTransform == i)
{
handleIndexToDisplayAsTransform = -1; // disable move tool if clicking on point under move tool
}
else
{
handleIndexToDisplayAsTransform = i;
}
}
Repaint();
break;
case PathHandle.HandleInputType.LMBPress:
if (handleIndexToDisplayAsTransform != i)
{
handleIndexToDisplayAsTransform = -1;
Repaint();
}
break;
}
Vector3 localHandlePosition = MathUtility.InverseTransformPoint(handlePosition, creator.transform, bezierPath.Space);
if (bezierPath[i] != localHandlePosition)
{
Undo.RecordObject(creator, "Move point");
bezierPath.MovePoint(i, localHandlePosition);
}
}
void DrawHandle(int i)
{
Vector3 handlePosition = bezierPath[i];
float anchorHandleSize = GetHandleDiameter(globalDisplaySettings.anchorSize * data.bezierHandleScale, bezierPath[i]);
float controlHandleSize = GetHandleDiameter(globalDisplaySettings.controlSize * data.bezierHandleScale, bezierPath[i]);
bool isAnchorPoint = i % 3 == 0;
bool isInteractive = isAnchorPoint || bezierPath.ControlPointMode != BezierPath.ControlMode.Automatic;
float handleSize = (isAnchorPoint) ? anchorHandleSize : controlHandleSize;
bool doTransformHandle = i == handleIndexToDisplayAsTransform;
PathHandle.HandleColours handleColours = (isAnchorPoint) ? splineAnchorColours : splineControlColours;
if (i == handleIndexToDisplayAsTransform)
{
handleColours.defaultColour = (isAnchorPoint) ? globalDisplaySettings.anchorSelected : globalDisplaySettings.controlSelected;
}
var cap = capFunctions[(isAnchorPoint) ? globalDisplaySettings.anchorShape : globalDisplaySettings.controlShape];
PathHandle.HandleInputType handleInputType;
handlePosition = PathHandle.DrawHandle(handlePosition, bezierPath.Space, isInteractive, handleSize, cap, handleColours, out handleInputType, i);
if (doTransformHandle)
{
// Show normals rotate tool
if (data.showNormals && Tools.current == Tool.Rotate && isAnchorPoint && bezierPath.Space == PathSpace.xyz)
{
Handles.color = handlesStartCol;
int attachedControlIndex = (i == bezierPath.NumPoints - 1) ? i - 1 : i + 1;
Vector3 dir = (bezierPath[attachedControlIndex] - handlePosition).normalized;
float handleRotOffset = (360 + bezierPath.GlobalNormalsAngle) % 360;
anchorAngleHandle.radius = handleSize * 3;
anchorAngleHandle.angle = handleRotOffset + bezierPath.GetAnchorNormalAngle(i / 3);
Vector3 handleDirection = Vector3.Cross(dir, Vector3.up);
Matrix4x4 handleMatrix = Matrix4x4.TRS(
handlePosition,
Quaternion.LookRotation(handleDirection, dir),
Vector3.one
);
using (new Handles.DrawingScope(handleMatrix)) {
// draw the handle
EditorGUI.BeginChangeCheck();
anchorAngleHandle.DrawHandle();
if (EditorGUI.EndChangeCheck())
{
Undo.RecordObject(creator, "Set angle");
bezierPath.SetAnchorNormalAngle(i / 3, anchorAngleHandle.angle - handleRotOffset);
}
}
}
else
{
handlePosition = Handles.DoPositionHandle(handlePosition, Quaternion.identity);
}
}
switch (handleInputType)
{
case PathHandle.HandleInputType.LMBDrag:
draggingHandleIndex = i;
handleIndexToDisplayAsTransform = -1;
Repaint();
break;
case PathHandle.HandleInputType.LMBRelease:
draggingHandleIndex = -1;
handleIndexToDisplayAsTransform = -1;
Repaint();
break;
case PathHandle.HandleInputType.LMBClick:
if (Event.current.shift)
{
handleIndexToDisplayAsTransform = -1; // disable move tool if new point added
}
else
{
if (handleIndexToDisplayAsTransform == i)
{
handleIndexToDisplayAsTransform = -1; // disable move tool if clicking on point under move tool
}
else
{
handleIndexToDisplayAsTransform = i;
}
}
Repaint();
break;
case PathHandle.HandleInputType.LMBPress:
if (handleIndexToDisplayAsTransform != i)
{
handleIndexToDisplayAsTransform = -1;
Repaint();
}
break;
}
if (bezierPath[i] != handlePosition)
{
Undo.RecordObject(creator, "Move point");
bezierPath.MovePoint(i, handlePosition);
// If the use is holding alt, try and mirror the control point.
if (Event.current.modifiers == EventModifiers.Alt)
{
// 0 = Anchor, 1 = Left Control, 2 = Right Control
var pointType = i % 3;
// If we are selecting a control point
if (pointType != 0)
{
// If we are selecting the left control point
if (pointType == 2)
{
// If the path doesn't loop and the user is selecting the last control point there isn't a control point to mirror
if (i < bezierPath.NumPoints - 2 && !bezierPath.IsClosed)
{
return;
}
// Get the index of this control's anchor.
var anchorIndex = (i + 1) % bezierPath.NumPoints;
var anchorPoint = bezierPath[anchorIndex];
// Get the index of the anchors other control.
// We don't have to loop this index b/c if it's the last control, it's anchors index will be 1.
var otherControlPointIndex = anchorIndex + 1;
// Move the other control point to the opposite of the selected control point's position relative to it's anchor.
bezierPath.MovePoint(otherControlPointIndex, anchorPoint - (handlePosition - anchorPoint));
}
// If we are selecting the right control point
else if (pointType == 1)
{
// If the path doesn't loop and the user is selecting the first control point there isn't a control point to mirror.
if (i > 1 && !bezierPath.IsClosed)
{
return;
}
// Get the index of this control's anchor.
var anchorIndex = i - 1;
var anchorPoint = bezierPath[anchorIndex];
// Get the index of the anchors other control.
var otherControlPointIndex = anchorIndex - 1;
// Make sure to loop this index back around if it is < 1.
if (otherControlPointIndex < 0)
{
otherControlPointIndex = bezierPath.NumPoints - Mathf.Abs(otherControlPointIndex);
}
// Move the other control point to the opposite of the selected control point's position relative to it's anchor.
bezierPath.MovePoint(otherControlPointIndex, anchorPoint - (handlePosition - anchorPoint));
}
}
}
}
}