Method
This node makes particles move in a rotational manner. This is typically used to create rotational vortex effects, e.g. tornados.
The effect is weighted by a falloff calculated using the distance from the node to the particle, ramping from 100% at distance zero down to 0% at the distance specified by the Radius attribute.
| Example |
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| This image is taken from the “tornado.dfx” sample project. |
| Example Nodegraph |
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Transform
| Name |
Description |
| Position X |
Move its position along the x-axis in local space. |
| Position Y |
Move its position along the y-axis in local space. |
| Position Z |
Move its position along the z-axis in local space. |
| Rotation Heading |
Rotate the object about the x-axis. |
| Rotation Pitch |
Rotate the object about the y-axis. |
| Rotation Bank |
Rotate the object about the z-axis. |
| Scale X |
Scale along the x-axis. |
| Scale Y |
Scale along the y-axis. |
| Scale Z |
Scale along the z-axis. |
Inherit Transform Channels
Toggle which transform channels should be inherited. By default, all are on.
Attributes
| Name |
Description |
| Velocity Amount |
Scale the strength of the affectors velocity on the particles. |
| Spread Angle |
Change the angle of spread for the particles. |
| Vortex Angle Scale |
Controls the effect of the angular velocity by radius, making particles further away from the centre of the vortex move faster. |
| Outward Velocity Amount / Blend |
Controls the amount particles are pushed outwards. |
| Radius |
Alter the outer radius at which the affector is no longer effective. |
| Randomness |
How much randomness is added in the particles movement. |
| Life Effect Coeffs |
How much the particles are affected by the affector at different stages of the particles life cycle. Values 1 and 2 are control points used to control a bezier curve between values 0 and 3. |
Inputs
| Name |
Description |
Typical Node Input |
| Vortex Position Node |
Overrides the vortex transform. |
Null |
| Mask Node |
Mask out areas that particles cannot spawn. |
Image Plane |
| Affected Emitters |
Choose which emitters can be affected by the affector. |
Primitive Emitter |
| Procedural Falloff |
Use the SDF values from a procedural system to dictate the falloff. |
Procedural Root |
| Transform Modifier |
Links all transform properties to the input node. |
Null |
| Target Node |
Always faces the x-axis towards the inputs anchor point. |
Null |
| Local Transform Override |
Override the transformation values of the node, relative to its parent. |
Null |
Outputs
All nodes connected to this node are treated as if flowing to the parent node, and inherits any transformation changes along the chain.
