SpeedSix.Smoke   (Discreet Box4)



PURPOSE

Smoke simulation using a particle system.
Smoke is a time based effect; the characteristics a particle is born with will evolve over time (every frame generated) to create the effect.

smokea.jpg smokeb.jpg



INPUT CLIPS

 1: Background Clip
 2: Birth Clip : The smoke can be optionally created only within the non-black areas of this clip. For example limiting the creation of the smoke to the fireplace.



Smoke   CONTROL PAGE

Restart Smoke  (Pushbutton)
     Restarts the smoke 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 smoke particle.

Restart+PreRoll  (Pushbutton)
     Restarts and pre-rolls the smoke 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 smoke one frame without changing frames or other settings. Useful for checking frame by frame evolution and motion speeds.

Left  (Position  Default: 0.5,0.1)

Right  (Position  Default: 0.5,0.3)

Position Var  (Number  Min: 0.0, Max: 2.0, Default: 0.02)
     The region within which smoke particles will be created.

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

Extinction  (Number  Min: 1.0, Max: 1000.0, Default: 80.0)
     How long each particle of smoke takes to fade away during its lifetime.

Use Birth Matte  (Checkbox  Default: Off)
Off: uses only the position 'lozenge' to generate the smoke particles.
On: uses the Birth clip to generate smoke in the union of the Birth clip white areas and the birth position lozenge.

Density  (Number  Min: 0.0, Max: 10000.0, Default: 800.0)
     How many smoke particles will be created each frame.

Initial Heat  (Number  Min: -80.0, Max: 80.0, Default: 8.0)
     The initial speed of a smoke particle. 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 smoke particle. The direction is always in the direction of gravity.

Demos  (List Box  Options: Dry Ice | Puff | Wisp | Steam | Gentle Smoke | Busy Smoke | Soft Swirl | Billow | Smoke Stack | Chimney | Slow Wisp | Swamp, Default: Dry Ice)
Select a preset to get you going.


Forces   CONTROL PAGE

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

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

SwirlDens  (Number  Min: 0.0, Max: 100.0, Default: 28.8)
     How many bumps there are in the atmosphere from one edge of the frame to the other. The smoke swirls as it runs into these bumps.

SwirlAmp  (Number  Min: 0.0, Max: 100.0, Default: 3.2)
     How powerful the bumps in the atmosphere are.

SwlMaxTim  (Number  Min: 0.0, Max: 500.0, Default: 25.0)
     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 smoke as a percentage of the smoke velocity lost per frame. Slows the smoke down.

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

Gravity  (Number  Min: 0.0, Max: 10.0, Default: 0.001)
     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: 33.0)
Wind Speed  (Number  Min: 0.0, Max: 180.0, Default: 16.0)
     The wind blows from the Source to the Target within a cone defined by the WindSpread with the strength of the WindSpeed.



Look   CONTROL PAGE

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

Init Intensity  (Number  Min: 0.0, Max: 100.0, Default: 25.0)
     Initial intensity (or brightness) at birth of a smoke particle.

Condensation  (Number  Min: 0.0, Max: 100.0, Default: 0.0)
     When born, a smoke particle 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 smoke particles.

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

Smoke Colour  (Colour Box  Default: white)
     Base smoke colour.

FadeMode  (List Box  Options: Col+Dens | Colour | Density, Default: Density)
This control affects how the smoke particles composite with one another and with the background image, and has a great effect on the final appearance.
Look  (List Box  Options: Point | Streak | Puff, Default: Puff)
How the smoke particles are drawn.
PointBlur  (Number  Min: 0.0, Max: 5.0, Default: 0.0)
     When in Point mode the particles are blurred and thus softened. You will need a great many smoke particles to see softened points but it can be worth the wait.

Puff Size  (Number  Min: 1.0, Max: 20.0, Default: 2.0)
     When in Puff mode this is the maximum size a puff of smoke can be.

Puff Size Var  (Number  Min: 0.0, Max: 100.0, Default: 100.0)
     How varied the puff sizes are. At 0.0 they will all be of a similar size.

Index