SpeedSix.Rainbow (Discreet Box9)
PURPOSE
Simulates rainbows (no gold however).
INPUT CLIPS
1: Background
: Background
2: Atmosphere
: Atmosphere
Rainbow CONTROL PAGE
Bow count (Number Min: 1, Max: 10, Default: 3)
Sets the number of ``orders'' or rainbows. Usually, you only see the first order rainbow in real life. You can sometimes see the second order (higher and more spread out than the first, and with the order of the colours reversed). There can be higher orders, too, but they are almost always too dim to see. Each order comes from light being reflected a different number of times within the raindrops before emerging to be viewed by the observer --- the first order comes from 1 reflection, the second from 2, and so on.
Centre (Position Default: 0.5,0.5)
Centre of the arc of the rainbow.
Radius (Number Min: 0.01, Max: 2.0, Default: 0.3)
Radius of the arc of the rainbow.
Prim Width (Number Min: 0.001, Max: 1.0, Default: 0.1)
Sets the width of the primary (first order - the one you usually see!) bow.
Width Scale (Number Min: 50.0, Max: 500.0, Default: 75.0)
Sets the width of higher order bows as a scaling of the preceding order bow width. If less than 1.0, bows will get narrower as their order increases. If greater than 1.0, they will get wider. This latter is the behaviour observed in real life, but the default is for them to get narrower for artistic reasons.
Gap Scale (Number Min: 100.0, Max: 1000.0, Default: 200.0)
Sets the gap to the next bow order as a scale of the bow width.
Fade (List Box Options: Full Circle | Linear Arc | Hermite Arc, Default: Linear Arc)
How the bow will fade off near the start and end angle positions.
Brightness (Number Min: 0.0, Max: 200.0, Default: 100.0)
Controls the relative brightness of the primary bow.
Density (Number Min: 0.0, Max: 100.0, Default: 100.0)
Sets the density of the rainbow. This controls the extent to which it obscures the background image.
StartAng (Number Min: -360.0, Max: 360.0, Default: 0.0)
EndAng (Number Min: -360.0, Max: 360.0, Default: 180.0)
DelAng (Number Min: 0, Max: 180, Default: 10)
These controls set the arc of the rainbow and over what region the bow fades out.
Drop Off (Number Min: 0.0, Max: 100.0, Default: 30.0)
Controls the relative brightness and density of higher order bows. This is a scaling of the brightness and density of the preceding bow order.
Atmosphere (Checkbox Default: Off)
The atmosphere clip controls the areas in which the rainbow will appear. If you use something like a cloud image the bows will be thinned by the luminosity of this clip. Or you can use it to mask out parts of the rainbow.
Vignette (Number Min: 0.0, Max: 100.0, Default: 0.0)
Setting this to more than 0.0 will cause the background image to be attenuated or darkened (cumulatively) beyond each successive bow order. This gives a nice artistic effect.
WidenBowBy (Number Min: 0.0, Max: 500.0, Default: 0.0)
Controls the relative width of the rightmost near-vertical part of the bow compared to the width of the bow at its highest point. The higher this number, the (relatively) wider the bow will get as it reaches the ground.