TYPE: POP
TITLE: Source POP

The Source POP births particles from referenced SOP geometry. It is a
generator POP. Local variables are usable in parameters denoted with a *.

Parameters:
Source
    Emission Type     - Where on source geometry to birth from
    Geometry Source   - Specifies where the POP should get
                        the source Object and SOP
    SOP               - SOP containing geometry
    Source Group      - Point or primitive group to birth from 
    Ignore Transform Object - Transform geometry to transform object space
    Distribution Attribute - Tells the POP which attribute to use as the
                             probability distribution for birthing.
    Density Threshold - When birthing from metaballs, continue sampling
                        points until the summed density exceeds this
                        threshold			/threshold
    Density Minimum   - When birthing from metaballs, points with densities
                        less than or equal to this value are not used	/densitymin
    Use Metaball Density - Tells the POP to use the metaball density function
                        as a probability distribution for birthing particles
Birth
    Impulse Activation  - Turns impulse birthing on and off		/impulseactivate
    Impulse Birth Rate  - Number of particles to birth per cook		/impulserate
    Constant Activation - Turns constant birthing on and off		/constantactivate
    Constant Birth Rate - How many particles to birth per second	/constantrate
    *Birth Probability  - How many particles to birth per source point	/probmin /probmax
    Birth Group         - Group to contain birthed points
    Preserve Group      - Add particles to group instead of clearing group first
    *Life Expectancy    - How long the particle will live in seconds	/life
    *Life Variance      - Variance of life expectancy in seconds	/lifevar
    Accurate Births     - Recook source geometry before birth of each particle
Attributes
    Inherit Attributes       - Which attributes to inherit from source
    Create Local Variables   - Create local variables corresponding to 
                               inherited attributes.
    Initial Velocity         - How to set the initial velocity	
    *Inherit Velocity        - How much of inherited velocity to use	/inheritvel
    *Velocity                - Used to set or add to velocity 		/velx /vely /velz
    *Variance                - Variance of set or added velocity		/varx /vary /varz
    Ellipsoid Distribution   - Distribute the velocities in a spheroid
                               of size determined by Variance, rather than
                               a cube.
Add Attributes
    Add ID Attributes        - Add ID and parent attributes
    Add Generation Attribute - Add generation attribute
    Add Origin Attribute     - Add origin attribute
    Use as Origin            - How to set the origin
    *Origin Index            - Index as used in origin		/originindex
    Add Speed Attribute      - Add speed attribute (length of velocity vector)

Local Variables
    Note - Please refer to the MMB help.

See Also: Location, Softbody, Split, Stream
