SDF Emitter
Emit particles that fill the volume of a mesh.
SDF Emitter
Method #
This node generates particles in a filled volume inside of an input 3D object. This requires that the input object is converted to a 3D signed distance field representation. Objects with animation or deformation are not supported. Useful for generating particles for fluid or physical simulations that need to be evenly spaced within a volume.
A 3D Object node must be connected to the Object Node input for this node to be effective.
The transformation values of this node will be inherited by its children. Furthermore, Affectors, Shading, and Rendering nodes will only be effective to the particles emit by this emitter.
Parameters
These properties control the 3D transforms of the node. Transforms will generally be inherited by child nodes, although they can be ignored through the Inherit Transform Channels attributes.
Parameter Details
Position X Move along the local x-axis.
Position Y Move along the local y-axis.
Position Z Move along the local z-axis.
Rotation Heading Rotate around the local y-axis.
Rotation Pitch Rotate around the local x-axis.
Rotation Bank Rotate around the local z-axis.
Scale X Scale along the local x-axis.
Scale Y Scale along the local y-axis.
Scale Z Scale along the local z-axis.
Toggle which transform channels should be inherited from the parent node. By default, all transforms will be inherited.
Parameter Details
Position X Toggle inheritance of the X Position from the parent.
Position Y Toggle inheritance of the Y Position from the parent.
Position Z Toggle inheritance of the Z Position from the parent.
Rotation Heading Toggle inheritance of the Rotation Heading from the parent.
Rotation Pitch Toggle inheritance of the Rotation Pitch from the parent.
Rotation Bank Toggle inheritance of the Rotation Bank from the parent.
Scale X Toggle inheritance of the X Scale from the parent.
Scale Y Toggle inheritance of the Y Scale from the parent.
Scale Z Toggle inheritance of the Z Scale from the parent.
World Position Only Inherit the world position from the parent only, rotation and scale will be ignored. Overrides above properties.
Inherit Time Toggle inheritance of time from the parent.
These properties control the core behaviours of the node.
Parameter Details
Randomness How much randomness is added in the particles movement.
Life Control how low long each particle exists for.
Life Randomness Control the randomness for the life of each particle.
Emission Rate What percentage of the particles are emitted from the emitter per second.
Max Particle Count Set a maximum particle count for the emitter.
Respawn Enabled Toggle whether a particle can respawn.
Particle Radius Legacy, no longer used.
SDF Width The depth in pixels of the signed distance field 3D voxel texture.
SDF Height The height in pixels of the signed distance field 3D voxel texture.
SDF Depth The width in pixels of the signed distance field 3D voxel texture.
These properties control the material the particles use for emission.
Parameter Details
Colour RGB colour of particles.
Diffuse Control how much the light is scattered from the surface of the object.
Emissiveness Control how much light is emitted by the particle.
Life Colour Affecter Weight Controls how much the result of any Life Colour Shading nodes are blended with the particle’s colour.
Particle Scale Scale the size of the particle.
Dof Amount How much depth of field effects the particles material.
Density The density, for use in some simulations.
Temperature The density, for use in some simulations.
Cooling Rate The cooling rate, for thermal dynamics simulations.
Density Decay Control the rate of decay in the density.
Fade In Time What percentage through the particles life span the particle fades in.
Fade Out Time What percentage through the particles life span the particle fades out.
Inputs
These properties control the 3D transforms of the node. Transforms will generally be inherited by child nodes, although they can be ignored through the Inherit Transform Channels attributes.
| Parameter | Details |
|---|---|
| Position X | Move along the local x-axis. |
| Position Y | Move along the local y-axis. |
| Position Z | Move along the local z-axis. |
| Rotation Heading | Rotate around the local y-axis. |
| Rotation Pitch | Rotate around the local x-axis. |
| Rotation Bank | Rotate around the local z-axis. |
| Scale X | Scale along the local x-axis. |
| Scale Y | Scale along the local y-axis. |
| Scale Z | Scale along the local z-axis. |
Toggle which transform channels should be inherited from the parent node. By default, all transforms will be inherited.
| Parameter | Details |
|---|---|
| Position X | Toggle inheritance of the X Position from the parent. |
| Position Y | Toggle inheritance of the Y Position from the parent. |
| Position Z | Toggle inheritance of the Z Position from the parent. |
| Rotation Heading | Toggle inheritance of the Rotation Heading from the parent. |
| Rotation Pitch | Toggle inheritance of the Rotation Pitch from the parent. |
| Rotation Bank | Toggle inheritance of the Rotation Bank from the parent. |
| Scale X | Toggle inheritance of the X Scale from the parent. |
| Scale Y | Toggle inheritance of the Y Scale from the parent. |
| Scale Z | Toggle inheritance of the Z Scale from the parent. |
| World Position Only | Inherit the world position from the parent only, rotation and scale will be ignored. Overrides above properties. |
| Inherit Time | Toggle inheritance of time from the parent. |
These properties control the core behaviours of the node.
| Parameter | Details |
|---|---|
| Randomness | How much randomness is added in the particles movement. |
| Life | Control how low long each particle exists for. |
| Life Randomness | Control the randomness for the life of each particle. |
| Emission Rate | What percentage of the particles are emitted from the emitter per second. |
| Max Particle Count | Set a maximum particle count for the emitter. |
| Respawn Enabled | Toggle whether a particle can respawn. |
| Particle Radius | Legacy, no longer used. |
| SDF Width | The depth in pixels of the signed distance field 3D voxel texture. |
| SDF Height | The height in pixels of the signed distance field 3D voxel texture. |
| SDF Depth | The width in pixels of the signed distance field 3D voxel texture. |
These properties control the material the particles use for emission.
| Parameter | Details |
|---|---|
| Colour | RGB colour of particles. |
| Diffuse | Control how much the light is scattered from the surface of the object. |
| Emissiveness | Control how much light is emitted by the particle. |
| Life Colour Affecter Weight | Controls how much the result of any Life Colour Shading nodes are blended with the particle’s colour. |
| Particle Scale | Scale the size of the particle. |
| Dof Amount | How much depth of field effects the particles material. |
| Density | The density, for use in some simulations. |
| Temperature | The density, for use in some simulations. |
| Cooling Rate | The cooling rate, for thermal dynamics simulations. |
| Density Decay | Control the rate of decay in the density. |
| Fade In Time | What percentage through the particles life span the particle fades in. |
| Fade Out Time | What percentage through the particles life span the particle fades out. |
| Name | Description | Typical Input |
|---|---|---|
| Object Node | The object that defines the emission shape. | 3D Object |
| Colour Control Nodes | Control the colours of the particles on emission. | Colour Ramp |
| Transform Modifiers | Apply the transforms of another node to this node. | Null |
| Target Node | Modifiy the rotations of the node to always direct the z axis towards the input. | Null |
| Local Transform Override | Apply the transforms of another node to this node, relative to its parent. | Null |
