| Parameter | Type | Description | 
|---|---|---|
| scaleX | double | The value by which to scale this LeadMatrix along the x-axis. | 
| scaleY | double | The value by which to scale this LeadMatrix along the y-axis. | 
| centerX | double | The x-coordinate of the scale operation's center point. | 
| centerY | double | The y-coordinate of the scale operation's center point. |