Interface for pointer events.
| actionKey | Returns true if the platform-specific action key is pressed. This key is Cmd on macOS, and Ctrl on all other platforms. |
| altitudeAngle | Angle of the stylus relative to the surface, in radians |
| altKey | Returns true if the Alt key is pressed. |
| azimuthAngle | Angle of the stylus relative to the x-axis, in radians. |
| button | Integer that indicates which mouse button is pressed: 0 is the left button, 1 is the right button, 2 is the middle button. |
| clickCount | The number of times the button is pressed. |
| commandKey | Returns true if the Windows/Cmd key is pressed. |
| ctrlKey | Returns true if the Ctrl key is pressed. |
| deltaPosition | The difference between the pointer's position during the previous mouse event and its position during the current mouse event. |
| deltaTime | The amount of time that has passed since the last recorded change in pointer values, in seconds. |
| isPrimary | Returns true if the pointer is a primary pointer |
| localPosition | The pointer position in the current target coordinate system. |
| modifiers | Flags that hold pressed modifier keys (Alt, Ctrl, Shift, Windows/Cmd). |
| pointerId | Identifies the pointer that sends the event. |
| pointerType | The type of pointer that created this event. This value is taken from the value defined in `PointerType`. |
| position | The pointer position in the Screen or World coordinate system. |
| pressedButtons | A bitmask that describes the currently pressed buttons. |
| pressure | The amount of pressure currently applied by a touch. If the device does not report pressure, the value of this property is 1.0f. |
| radius | An estimate of the radius of a touch. Add `radiusVariance` to get the maximum touch radius, subtract it to get the minimum touch radius. |
| radiusVariance | Determines the accuracy of the touch radius. Add this value to the radius to get the maximum touch radius, subtract it to get the minimum touch radius. |
| shiftKey | Returns true if the Shift key is pressed. |
| tangentialPressure | The pressure applied to an additional pressure-sensitive control on the stylus. |
| twist | The rotation of the stylus around its axis, in radians. |