Particle System Constraints
This article contains speculation that needs to be confirmed.
Particle Constraints prevent particles from passing through certain areas, such as brushes. The can also be user-defined, such as a 2-Dimensional plane.
Collision via traces
Uses traces for checking collisions.
- collision mode
- Type of collision? Valid ranges not known
- collision group
- Known arguments are NONE and DEBRIS?
- amount of bounce
- Amount of bounce force to apply when a collision occurs.
- amount of slide
- Amount of sliding force applied to particles currently on a surface.
- kill particle on collision
- Destroys the particle when it collides with an object
- brush only
- If 1, the particle will collide only with brushes
- trace accuracy tolerance
- Amount of tolerance to use when calculating collisions. Higher values mean more tolerance, but less realistic collisions. Lower values mean more accurate collisions, most likely at the cost of additional calculations.
Constrain distance to path between two control points
Keeps particles on a path between two control points. Internally determined control point only?
- minimum distance
- Minimum distance between the two control points. It's recommended to keep this at zero.
- maximum distance
- Maximum distance between the two control points. It needs to be equal or greater than the distance between the two control points, in order to work.
- maximum distance middle
- Maximum distance between start and the middle? Default value is -1 which means off?
- maximum distance end
- Maximum distance between middle and end point? Default value is -1 which means off?
- travel time
- Maximum time a particle can spend traveling between the two points?
- random bulge
- Random clumping of particles? (No idea)
- start control point number
- The starting control point number. 0 is recommended since it is the particle system's origin.
- end control point number
- The end control point number. Using the start control point number is NOT recommended, as the particles will just around. See this in order to make a control point.
- bulge control 0=random 1=orientation of start pnt 2=orientation of end point
- Pretty self explanatory, determines where to place the bulge
- mid point position
- Determines the middle of the path, in a decimal percentage. 0.5 is the middle, 1 is the end, 0 is the beginning?
Prevent passing through a plane
Blocks particles from passing through an imaginary two-dimensional plane. Default settings make it at the bottom of the particle's origin.
- global origin
- Use global origin instead of particle origin? (Not recommended)
- plane point
- The 2nd Point to use to define the plane?
- plane normal
- 3D vector that determines the angle of the plane (same concept as VPlane)
Prevent passing through static part of world
Prevents passing through any static part of the world. I.e. prop_statics, brushes, etc