nParticles -> Create Emitter (don't have anything selected)
Particle object is created and connected to the emitter
It will be the default emitter (or the last one you picked) and it is placed at the origin of the world
Click Play to see them in action (make sure you give yourself a minimum of 600 frames to work with)
Creating Object Emitter - (attached to a piece of geometry)
Select a polygon or NURBS single piece of geometry (make a sphere)
nParticles -> Emit from Object
The particle and nucleus object is created and connected to the emitter
The emitter is grouped to the geometry
Look at the Outliner
To emit from CVs or edit points
Select Component - pick the points or CVs you want to emit from
nParticles -> Emitter from Object
Edit menu -> Duplicate Special
Select Duplicate Input Graph so it connects to and makes new particles
Deleting an Emitters
Deleting an Emitter (hit Backspace or Delete key) does not delete the particles - you must do this manually.
Look in the Outliner
Create Emitter Options
Emitter Name - give it a name
Solver - (we will discuss this later)
Emitter Type - omni, directional, volume
Omni - starts at a center point and eminates outward in all directions.
You are limited to the options below:
Directional - make sure you change the spread or you end up with a line of particles. Alter the direction by changing the Direction X, Y and Z with a number between 0 and 1 with 1 = fully in that direction.
It allows you to alter more parameters:
Volume - select from a volume type - each volume type will change the available parameter in the Volume section:
Basic Emitter Attributes (Emission Attributes in the Attribute Editor)
Rate (particle/sec) - how many particles per second are born
Max Distance - how far away from the emitter are particles emitted
Min Distance - how close to the emitter are particles born
(it always randomly gives birth to particles between min and max)
Direction (only for directional emitters) XYZ
Spread - particles are randomly distributed in this cone area.
You can enter any value between 0 and 1.
1 = 180 degrees .5 = 90 degrees .33 = 60 degrees
For Directional and Curve Emitters Only
Basic Emission Speed Attributes:
Speed - how fast they move
Speed Random - pick a number between 0 and 1 with 1 being more randomness
Volume Emitter Attributes: - these attributes change depending on the shape you choose
Your options are: - Cube, Sphere, Cylinder, Cone and Torus - you cannot make your own shape
You can move, scale, rotate and shere these shapes using standard geometry transformations.
Offset - changes where the particles come out relative to the shape
Volume Sweep - for instance when using a sphere, you can only have the particles come out of a part of the volume. Pick a number between 0 and 360.
Section Radius - Only used in Torus to - the thichness of the torus
Die on emission volume exit - when the particles leave the shape they die
Volume Speed Attributes: - these attributes change depending on the shape you choose
Away from center - how fast they move away from the center
Away from Axis - the speed at which particles move away from the central axis of cylinder, cone, or torus volumes
Along Axis - The speed at which particles move along the central axis of all volumes. The central axis is defined as positive-Y for cube and sphere volumes.
Around Axis - Specifies the speed at which particles move around the central axis of all volumes.
Random Direction - Adds irregularity to the direction and initial speed of the particle’s Volume Speed attributes, somewhat like Spread does for other emitter types.
Directional Speed - Adds speed in the direction specified by the Direction XYZ attributes of all volume emitters.
Scale Speed by Size - If you turn this attribute on, when you increase the size of the volume, the speed of the particles increases.
Emit from Object Options
Select the object or CVs before Emit from Object options
Omni and Directional - will emanate from the CVs or vertices
Surface Emitter - emits from the surface of an object
Curve Emitter - emits from random positions on the curve
Scale Rate by Object Size - change it in relationship to the object size
Emitter Attribute Editor
Same options as in the Create Emitter Options with the addition of the Transform Attributes
Next Lecture: [Particle Options]