// 绘制曲线
void DrawCurve(Rect rect, Color backgroundColor, Color range01Color, Color curveColor, Color borderColor)
{
EditorGUI.DrawRect(rect, backgroundColor);
Vector2 origin = new Vector2(rect.x + 1, rect.y + 1);
Vector2 scale = new Vector2(rect.width - 2, (rect.height - 2) / (_maxValue - _minValue));
if (_maxValue > 0f && _minValue < 1f)
{
float yMin = origin.y + (_maxValue - Mathf.Min(_maxValue, 1f)) * scale.y;
float yMax = origin.y + (_maxValue - Mathf.Max(_minValue, 0f)) * scale.y;
Rect rect01 = new Rect(rect.x, yMin, rect.width, yMax - yMin);
EditorGUI.DrawRect(rect01, range01Color);
}
Vector3 last = _samples[0];
last.x = origin.x + last.x * scale.x;
last.y = origin.y + (_maxValue - last.y) * scale.y;
EditorKit.RecordAndSetHandlesColor(curveColor);
Vector3 point;
for (int i = 1; i < _samples.Count; i++)
{
point = _samples[i];
point.x = origin.x + point.x * scale.x;
point.y = origin.y + (_maxValue - point.y) * scale.y;
EditorKit.HandlesDrawAALine(last, point);
last = point;
}
EditorKit.RestoreHandlesColor();
EditorKit.DrawWireRect(rect, borderColor);
}
// 绘制 Node 控件
void DrawNodeControls(bool edit)
{
_count = nodeCount;
for (int i = 0; i < _count; i++)
{
// 获取控制点位置
_back = GetBackControlPoint(i);
_forward = GetForwardControlPoint(i);
_middle = GetMiddleControlPoint(i);
// 绘制切线
Handles.color = _controlLineColor;
EditorKit.HandlesDrawAALine(_back, _middle);
EditorKit.HandlesDrawAALine(_forward, _middle);
// 绘制后控制点
EditorGUI.BeginChangeCheck();
EditorKit.BeginHotControlChangeCheck();
if (_selectionType == SelectionType.BackControlPoint && _selectedItem == i)
{
Handles.color = _capSelectedColor;
}
else
{
Handles.color = _capNormalColor;
}
_handleSize = HandleUtility.GetHandleSize(_back) * _controlPointCapSize;
_back = Handles.FreeMoveHandle(_back, _identityQuaternion, _handleSize, _zeroVector3, Handles.DotCap);
// 更新选择
if (EditorKit.EndHotControlChangeCheck() == HotControlEvent.MouseDown)
{
_selectionType = SelectionType.BackControlPoint;
_selectedItem = i;
}
// 修改后控制点
if (EditorGUI.EndChangeCheck() && edit)
{
Undo.RecordObject(this, undoBackControlPoint);
SetBackControlPoint(i, _back);
EditorUtility.SetDirty(this);
}
// 绘制中控制点
EditorGUI.BeginChangeCheck();
EditorKit.BeginHotControlChangeCheck();
if (_selectionType == SelectionType.MiddleControlPoint && _selectedItem == i)
{
Handles.color = _capSelectedColor;
}
else
{
Handles.color = _capNormalColor;
}
_handleSize = HandleUtility.GetHandleSize(_middle) * _controlPointCapSize;
_middle = Handles.FreeMoveHandle(_middle, _identityQuaternion, _handleSize, _zeroVector3, Handles.DotCap);
// 更新选择
if (EditorKit.EndHotControlChangeCheck() == HotControlEvent.MouseDown)
{
_selectionType = SelectionType.MiddleControlPoint;
_selectedItem = i;
}
// 修改中控制点
if (EditorGUI.EndChangeCheck() && edit)
{
Undo.RecordObject(this, undoMiddleControlPoint);
SetMiddleControlPoint(i, _middle);
EditorUtility.SetDirty(this);
}
// 绘制前控制点
EditorGUI.BeginChangeCheck();
EditorKit.BeginHotControlChangeCheck();
if (_selectionType == SelectionType.ForwardControlPoint && _selectedItem == i)
{
Handles.color = _capSelectedColor;
}
else
{
Handles.color = _capNormalColor;
}
_handleSize = HandleUtility.GetHandleSize(_forward) * _controlPointCapSize;
_forward = Handles.FreeMoveHandle(_forward, _identityQuaternion, _handleSize, _zeroVector3, Handles.DotCap);
// 更新选择
if (EditorKit.EndHotControlChangeCheck() == HotControlEvent.MouseDown)
{
_selectionType = SelectionType.ForwardControlPoint;
_selectedItem = i;
}
// 修改前控制点
if (EditorGUI.EndChangeCheck() && edit)
{
Undo.RecordObject(this, undoForwardControlPoint);
SetForwardControlPoint(i, _forward);
EditorUtility.SetDirty(this);
}
}
}
protected override void DrawKeyValueInScene(Vector3 position, Quaternion value, float handleSize)
{
if (_space == RotationSpace.Path) value = path.TransformRotation(value);
EditorKit.HandlesDrawAALine(position, position + handleSize * (value * Vector3.up));
Handles.ArrowCap(0, position, value, handleSize);
}