// 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);
}