TYPE: COP
TITLE: Hue Curve

Adjusts the saturation or luminance of the image based on hue. This node
is normally editted interactively by clicking the 'Edit Color Curves' button.
This opens a popup curve editor.

To edit the curve in the curve editor, you can:

    - Left click to add a new curve point.

    - Left drag a point to a new location

    - Select points by Alt+LMB clicking them, or by Alt+LMB dragging a box around
      them.

    - Delete a point by pressing Del while over the point.

    - Increase the curves sharpness at a point by MMB dragging the point.

If you switch to a specific component (1,2,3,4) and then edit the curve, the 
operator will automatically switch to component mode. It is often easier to 
edit component curves alone by isolating the component.

Middle click on the dialog '?' help for more help on maskable pixel operations.


Parameters:

Hue Curve
    Edit Hue Curve    - Opens a curve editor for interactive editting.
    Hue Operation     - Either adjusts saturation or luminance of hues.
        Adjust Saturation - Boosts or reduces the color saturation of hues.
        Adjust Luminance  - Changes the luminance of hues.
                           
    Hue Curve         - The number of points in the hue curve.
        Point 1,2... - The U and V values of the point. The third value 
                       represents the points sharpness. A sharpness of 1
                       produces a hard, linear edge at the point, whereas 0
                       produces a smooth curve at the point.

Local Variables:
    L   - Sequence length
    S   - Start of sequence
    E   - End of sequence
    IL  - Input sequence length
    SR  - Sequence frame rate
    NP  - Number of planes in sequence
    W,H - Width and height of image
    I   - Image index (0 at start frame)
    IT  - Image time (0 at start frame)
    AI  - Current plane array index
    PI  - Current plane index
    PC  - Num of channels in current plane

See Also: ColorCorrect, ColorCurve, Pixel Operations (pixelop.extra.html)