SpeedSix.Rain   (Discreet Box4)



PURPOSE

Rain is a time based effect; the characteristics a particle of rain is born with, will evolve over time (every frame generated) to create the effect.

raina.jpg rainb.jpg



INPUT CLIPS

 1: Background Clip

rainH2.jpg Example : Birth

 2: Birth : The rain can be optionally created only within the non-black areas of this clip. For example limiting the creation of the rain to a cloudy area.

rainH3.jpg Example : Bounce

 3: Bounce : The rain can optionally 'bounce' when it reaches a non-black area of this clip.



Rain   CONTROL PAGE

Restart Rain  (Pushbutton)
     Restarts the rain sequence using the current settings. This control will be found on several pages to help you quickly see the results of any changes to the birth properties of each rain drop.

Restart+PreRoll  (Pushbutton)
     Restarts and pre-rolls the rain for the current value of PreRoll

Do PreRoll  (Pushbutton)
     To see further into the evolution of the particles, do another preroll.

PreRoll  (Number  Min: 1, Max: 1000, Default: 50)
     Run the particle system for the specified number of pre-roll frames before generating the first frame of the output clip.

Advance  (Pushbutton)
     Click to advance the rainstorm one frame without changing frames or other settings. Useful for checking frame by frame evolution and motion speeds.

Left  (Position  Default: 0.2,0.8)

Lifetime  (Number  Min: 1.0, Max: 1000.0, Default: 80.0)
     How long each rain drop will live for.

Extinction  (Number  Min: 1.0, Max: 1000.0, Default: 180.0)
     How long each drop takes to fade away during its lifetime.

Use Birth Matte  (Checkbox  Default: Off)
Off: uses only the position 'lozenge' to generate the rain particles.
On: uses the Birth clip to generate rain only if covered by the position lozenge.

Density  (Number  Min: 0.0, Max: 10000.0, Default: 40.0)
     How many raindrops will be created each frame.

Position Var  (Number  Min: 0.0, Max: 1000.0, Default: 20.0)
     The region within which rain particles will be created.

Right  (Position  Default: 0.8,0.8)

Initial Velocity  (Number  Min: -80.0, Max: 80.0, Default: -5.0)
     The initial speed of a rain drop. The direction is always in the direction of gravity.

Velocity Var  (Number  Min: 0.0, Max: 100.0, Default: 100.0)
     Size of random variations in initial speed of a raindrop. The direction is always in the direction of gravity.

Streak Scale  (Number  Min: 0.1, Max: 1000.0, Default: 100.0)
     Raindrops are always drawn as streaks (with a blob at the leading end, if they are glistening). (Streaks are anti-aliased lines). Normally, the streaks extend from the position of the drop in the last frame, to its position in this, getting denser along the path towards the current frame. This parameter lets the length of the streak be scaled from its normal length (distance covered between frames).

Puddle Bounce  (Checkbox  Default: Off)
     Activates the bouncing feature. When the rain hits non black areas in the Bounce clip, they react - bouncing off it.

Puddle Rebound  (Number  Min: -200.0, Max: 200.0, Default: 10.0)
     Controls the loss of velocity of a rain drop each time it bounces.

Bounces  (Number  Min: 1, Max: 200, Default: 26)
     How many times the rain bounces.

Demos  (List Box  Options: Rain | Drizzle | Squall | Sheet | Light | BounceA | BounceB | Movement | Bouncing, Default: Rain)
Select a preset to get you going.


Forces   CONTROL PAGE

Restart Rain  (Pushbutton)
Restart+PreRoll  (Pushbutton)
Do PreRoll  (Pushbutton)
     See start descriptions.

Turbulence  (Checkbox  Default: On)
     Turns on the turbulence feature.

SwirlDens  (Number  Min: 0.0, Max: 100.0, Default: 4.4)
     How many bumps there are in the atmosphere from one edge of the frame to the other. The rain swirls as it runs into these bumps.

SwirlAmp  (Number  Min: 0.0, Max: 100.0, Default: 1.29)
     How powerful the bumps in the atmosphere are.

SwlMaxTim  (Number  Min: 0.0, Max: 500.0, Default: 0.0)
     Frames over which the swirl amplitude builds up to its maximum value (set by SwirlAmp).

Friction  (Checkbox  Default: On)
     Turn on the friction feature.

Friction  (Number  Min: 0.0, Max: 1.0, Default: 0.01)
     Controls the frictional force of the atmosphere on the drops as a percentage of the drops velocity lost per frame. i.e. slows the rain down.

Gravity  (Checkbox  Default: On)
     Turn on the gravity feature.

Gravity  (Number  Min: 0.0, Max: 10.0, Default: 1.0)
     Scales the strength of the gravitational force.

Grav Angle  (Number  Min: 0.0, Max: 359.0, Default: 270.0)
     Controls the angle at which gravity acts, measured in degrees clockwise from due East. The default [270.0] is towards the bottom of the image.

Wind  (Checkbox  Default: Off)
     Turn on the wind feature.

Wind  (Position  Default: 0.2,0.4)

Target  (Position  Default: 0.8,0.4)

Wind Spread  (Number  Min: 0.0, Max: 180.0, Default: 90.0)
Wind Speed  (Number  Min: 0.0, Max: 180.0, Default: 2.0)
     The wind, when active, blows from the Source to the Target within a cone defined by the WindSpread with the strength of the WindSpeed.



Colour   CONTROL PAGE

Restart Rain  (Pushbutton)
Restart+PreRoll  (Pushbutton)
Do PreRoll  (Pushbutton)
     See start descriptions.

Init Intensity  (Number  Min: 0.0, Max: 100.0, Default: 100.0)
     Initial intensity (or brightness) at birth of a raindrop.

Condensation  (Number  Min: 0.0, Max: 100.0, Default: 25.0)
     When born, a raindrop can be transparent. This controls how quickly it becomes denser and more visible.

ColourVar  (Number  Min: 0.0, Max: 100.0, Default: 0.0)
     Random variation in the colour of the raindrops.

MonoVar  (Number  Min: 0.0, Max: 100.0, Default: 0.0)
     Random variation in the brightness / density of the raindrops.

Rain Colour  (Colour Box  Default: white)
     Base rain clour.

FadeMode  (List Box  Options: Col+Dens | Colour | Density, Default: Density)
This control affects how the raindrops composite with one another and with the background image and has a great effect on the final appearance. For rain, using Density is usually best.


Light   CONTROL PAGE

Light  (Checkbox  Default: Off)
     Turn on the light feature.

Light Colour  (Colour Box  Default: white)
     The colour of the light.

Light  (Position  Default: 0.9,0.5)

Light Target  (Position  Default: 0.1,0.5)
     The light shines from the source towards the target.

Light Inten  (Number  Min: 0.0, Max: 200.0, Default: 50.0)
     Sets the brightness of a light source illuminating the raindrops. If this is zero, 0.0, the drops are treated as semi-transparent objects, and the lighting controls have no effect.

Light Spread  (Number  Min: 0.0, Max: 180.0, Default: 90.0)
     Angle of a cone within which the light is shining. The cone's axis is along the direction of the light. Outside the cone, the light intensity is zero. It reaches maximum intensity within 10% of the angle from the edges of the cone.

Glisten Tight  (Number  Min: 0.0, Max: 1000.0, Default: 30.0)
     Controls a region around the direction in which the light is shining, in which the drops will be given a glistening effect.

Min. Bright  (Number  Min: 0.0, Max: 100.0, Default: 60.0)
     Sets the minimum brightness of a raindrop when drops are being lit by a light source but not within the main beam of light.

Index