snnib.blender.geo_nodes

custom geometry nodes node groups

• defines geometry nodes (geo nodes) node trees

• makes them available in the [blender](https://www.blender.org/)s geo nodes

• naming pattern: Snnib<Name>

Exceptions

Classes

Functions

• network_container() – geo nodes node tree for a network container

• neurite_bends() – adds random bends to neurites

• neurite_branches() – adds random branches to geometry

• neurite_to_mesh() – converts neurite curves to mesh

• neurite_twist() – adds twist to neurites

• neuron_neurites() – combined group for a single neuron including its outgoing neurites

• position_global() – returns position in global (world) coordinates

• remesh() – similar to remesh modifier

• scale_radial() – applies scaling in radial direction

• spiketrain() – generates color-sequence for spiketrain encoding from given SNNIB spiketrain texture

Other Objects

Functions

network_container()	creates a geometry nodes node group to style the network container
neurite_bends()	applies random bends to some curve
neurite_branches()	creates a set of branches in random directions originating at Host Mesh
neurite_to_mesh()	converts some input neurite (curve) to a mesh
neurite_twist()	applies twist to some curve
neuron_neurites()	creates template geonodes node group for defining neurons, dendrites, and axons
position_global()	creates a geometry nodes node group that returns position in global (world) coordinates
register()
remesh()	creates a geometry nodes node group similar to remesh modifier
scale_radial()	creates a geometry nodes node group that scales input geometry radially
spiketrain()	creates a geometry nodes node group to generate colors for spiketrain
unregister()

snnib.blender.geo_nodes.network_container()

creates a geometry nodes node group to style the network container

• converts to wireframe

Parameters

Raises

Returns

Dependencies

• bpy

• logging

snnib.blender.geo_nodes.neurite_bends()

applies random bends to some curve

• controlled via noise texture

Parameters

Raises

Returns

Dependencies

• bpy

• logging

snnib.blender.geo_nodes.neurite_branches()

creates a set of branches in random directions originating at Host Mesh

• used to procedurally generate outgoing non-connections

Parameters

Raises

Returns

Dependencies

• bpy

• logging

snnib.blender.geo_nodes.neurite_to_mesh()

converts some input neurite (curve) to a mesh

• applies thickness to neurite

Parameters

Raises

Returns

Dependencies

• bpy

• logging

snnib.blender.geo_nodes.neurite_twist()

applies twist to some curve

Parameters

Raises

Returns

Dependencies

• bpy

• logging

snnib.blender.geo_nodes.neuron_neurites()

creates template geonodes node group for defining neurons, dendrites, and axons

• this group is used to make created networks customizable in an intuitive, procedual manner

• contains all basic tweakable parameters to customize the look of neurons in the SNNIB network

Parameters

Raises

Returns

Dependencies

• bpy

• logging

snnib.blender.geo_nodes.position_global()

creates a geometry nodes node group that returns position in global (world) coordinates

• useful for defining one GeoNodes modifier and applying it to different objects scattered throughout the scene

  • i.e., small random variations in each neuron

Parameters

Raises

Returns

Dependencies

• bpy

• logging

snnib.blender.geo_nodes.remesh()

creates a geometry nodes node group similar to remesh modifier

• achieved by voxelizing the input

Parameters

Raises

Returns

Dependencies

• bpy

• logging

snnib.blender.geo_nodes.scale_radial()

creates a geometry nodes node group that scales input geometry radially

Parameters

Raises

Returns

Dependencies

• bpy

• logging

snnib.blender.geo_nodes.spiketrain()

creates a geometry nodes node group to generate colors for spiketrain

• result stored as attribute to be used downstream for texturing

Parameters

Raises

Returns

Dependencies

• bpy

• logging