ParticleInfo

The ParticleInfo node displays particle data from any particle system attached to the node's input, which is useful for troubleshooting if your particles aren't behaving correctly. For example, if a particle's texture didn't display as expected, you could enable orientation as axis to overlay axes in the 3D Viewer to check the particle's orientation. Available data includes particle index, velocity, and position as well as the total number of particles in the system. The maximum number of particles within a system in Nuke is 1000000.

Inputs and Controls

Connection Type	Connection Name	Function
Input	particles	The particle system from which to display particle information.

Control (UI)	Knob (Scripting)	Default Value	Function
ParticleInfo Tab
display	display	unchanged	Adjust the display characteristics of the particles. These settings don’t affect the render output of the scene; these are for display purposes only in the 3D Viewer. • off - hides the particles. • wireframe - displays only the outlines of the particle. • solid - displays all particles with a solid color. • solid+wireframe - displays the particles as solid color with the particles outlines. • textured - displays only the surface texture. • textured+wireframe - displays the wireframe plus the surface texture. • unchanged - doesn't change the particle's display mode. The Viewer can override this setting.
selectable	selectable	on	When enabled, you can select the particles in the Viewer by clicking on them.
render	render_mode	unchanged	Sets how the particles are rendered. This control is independent from the display selection, but has the same settings.
show count	show_count	on	Displays the total particle count in the system attached to the node, up to a maximum of 1000000.
index	showIndex	off	Displays the index of each particle in the system starting from 0 for the first particle.
ID	showId	off	Displays the unique identifier assigned to each particle in the system after it is emitted.
frame	showFrame	off	Displays the current frame for each particle's texture.
first frame	showFirstFrame	off	Displays the first frame for each particle's texture.
last frame	showLastFrame	off	Displays the last frame for each particle's texture.
time	showTime	off	Displays the age of each particle since it was emitted, in frames.
life	showLife	off	Displays the maximum lifetime of each particle as set in the ParticleEmitter max lifetime control and within the max lifetime range specified.
age	showAge	off	Displays each particles age, which is calculated as time/life and shown as a value between 0 and 1.
velocity as text	showVelocity	off	Displays the velocity of each particle at the current frame as an XYZ coordinate direction.
velocity as vector	showVelocityAsVector	off	Displays the velocity of each particle at the current frame as an arrow indicating direction. The length of the arrow also indicates the particle's position in the next frame.
orientation as text	showOrientation	off	Displays the orientation of each particle at the current frame as a quaternion, the quotient of two vectors.
orientation as axis	showOrientationAsAxis	off	Displays the orientation of each particle at the current frame as XYZ axes.
rotation axis as text	showRotationAxis	off	Displays the rotation axis as text. The rotation axis is the axis around which particles rotate if rotation_velocity in the ParticleEmitter is set to anything other than 0.
rotation axis as vector	showRotationAxisAsVector	off	Displays the rotation axis as an arrow indicating direction. The rotation axis is the axis around which particles rotate if rotation_velocity in the ParticleEmitter is set to anything other than 0.
sprite rotation (degrees)	showRotationAngle	off	When emitting sprites, displays the rotation of each sprite at the current frame in degrees.
position	showPosition	off	Displays the position of each particle at the current frame in relation to the emitter origin as an XYZ coordinate.
last pos as text	showLastPosition	off	Displays the position of each particle in the previous frame in relation to the emitter origin as an XYZ coordinate.
last pos as vector	showLastPositionAsVector	off	Displays the position of each particle in the previous frame as an arrow indicating direction to the current frame.
initial pos as text	showInitialPosition	off	Displays the initial position of each particle as an XYZ coordinate.
initial pos as vector	showInitialPositionAsVector	off	Displays the initial position of each particle as an arrow indicating direction to the current frame.
color	showColor	off	Displays the RGBA values of each particle at the current frame .
size	showSize	off	Displays the size of each particle as set in the ParticleEmitter size control and within the size range specified.
mass	showMass	off	Displays the mass of each particle as set in the ParticleEmitter mass control and within the mass range specified. A particle's mass is only useful when a force is applied to the particles.
channels	showChannels	off	Particles are emitted with channels a by default. You can change the channels with a ParticleExpression or ParticleBounce node so that downstream nodes only act on particles in certain channels. For example, you could emit particles you don't want gravity to affect in channel b and set your ParticleGravity node to only affect channel a.
axis scale	axisScale	1	When controls like velocity as vector and orientation as axis are enabled, controls the size of the axis or axes displayed in the Viewer for each particle.
first particle	firstParticle	0	Controls the range of particles for which information is displayed, starting from the index of the first particle specified. You can use the max particles control to limit the amount of information on screen in large particle systems.
max particles	maxParticles	1000