user: Show practical ways to work with Object Modifier Type Items in a Blender add-on or script – include code.

assistant: # Object Modifier Type Items

**Modify**

GREASE_PENCIL_VERTEX_WEIGHT_PROXIMITY:
:   Vertex Weight Proximity.

    Generate vertex weights based on distance to object.

**Modify**

DATA_TRANSFER:
:   Data Transfer.

    Transfer several types of data (vertex groups, UV maps, vertex colors, custom normals) from one mesh to another.

MESH_CACHE:
:   Mesh Cache.

    Deform the mesh using an external frame-by-frame vertex transform cache.

MESH_SEQUENCE_CACHE:
:   Mesh Sequence Cache.

    Deform the mesh or curve using an external mesh cache in Alembic format.

NORMAL_EDIT:
:   Normal Edit.

    Modify the direction of the surface normals.

WEIGHTED_NORMAL:
:   Weighted Normal.

    Modify the direction of the surface normals using a weighting method.

UV_PROJECT:
:   UV Project.

    Project the UV map coordinates from the negative Z axis of another object.

UV_WARP:
:   UV Warp.

    Transform the UV map using the difference between two objects.

VERTEX_WEIGHT_EDIT:
:   Vertex Weight Edit.

    Modify of the weights of a vertex group.

VERTEX_WEIGHT_MIX:
:   Vertex Weight Mix.

    Mix the weights of two vertex groups.

VERTEX_WEIGHT_PROXIMITY:
:   Vertex Weight Proximity.

    Set the vertex group weights based on the distance to another target object.

GREASE_PENCIL_COLOR:
:   Hue/Saturation.

    Change hue/saturation/value of the strokes.

GREASE_PENCIL_TINT:
:   Tint.

    Tint the color of the strokes.

GREASE_PENCIL_OPACITY:
:   Opacity.

    Change the opacity of the strokes.

GREASE_PENCIL_VERTEX_WEIGHT_ANGLE:
:   Vertex Weight Angle.

    Generate vertex weights based on stroke angle.

GREASE_PENCIL_TIME:
:   Time Offset.

    Offset keyframes.

GREASE_PENCIL_TEXTURE:
:   Texture Mapping.

    Change stroke UV texture values.

**Generate**

ARRAY:
:   Array.

    Create copies of the shape with offsets.

BEVEL:
:   Bevel.

    Generate sloped corners by adding geometry to the mesh’s edges or vertices.

BOOLEAN:
:   Boolean.

    Use another shape to cut, combine or perform a difference operation.

BUILD:
:   Build.

    Cause the faces of the mesh object to appear or disappear one after the other over time.

DECIMATE:
:   Decimate.

    Reduce the geometry density.

EDGE_SPLIT:
:   Edge Split.

    Split away joined faces at the edges.

NODES:
:   Geometry Nodes.

MASK:
:   Mask.

    Dynamically hide vertices based on a vertex group or armature.

MIRROR:
:   Mirror.

    Mirror along the local X, Y and/or Z axes, over the object origin.

MESH_TO_VOLUME:
:   Mesh to Volume.

MULTIRES:
:   Multiresolution.

    Subdivide the mesh in a way that allows editing the higher subdivision levels.

REMESH:
:   Remesh.

    Generate new mesh topology based on the current shape.

SCREW:
:   Screw.

    Lathe around an axis, treating the input mesh as a profile.

SKIN:
:   Skin.

    Create a solid shape from vertices and edges, using the vertex radius to define the thickness.

SOLIDIFY:
:   Solidify.

    Make the surface thick.

SUBSURF:
:   Subdivision Surface.

    Split the faces into smaller parts, giving it a smoother appearance.

TRIANGULATE:
:   Triangulate.

    Convert all polygons to triangles.

VOLUME_TO_MESH:
:   Volume to Mesh.

WELD:
:   Weld.

    Find groups of vertices closer than dist and merge them together.

WIREFRAME:
:   Wireframe.

    Convert faces into thickened edges.

GREASE_PENCIL_ARRAY:
:   Array.

    Duplicate strokes into an array.

GREASE_PENCIL_BUILD:
:   Build.

    Grease Pencil build modifier.

GREASE_PENCIL_LENGTH:
:   Length.

    Grease Pencil length modifier.

LINEART:
:   Line Art.

    Generate Line Art from scene geometries.

GREASE_PENCIL_MIRROR:
:   Mirror.

    Duplicate strokes like a mirror.

GREASE_PENCIL_MULTIPLY:
:   Multiple Strokes.

    Generate multiple strokes around original strokes.

GREASE_PENCIL_SIMPLIFY:
:   Simplify.

    Simplify stroke reducing number of points.

GREASE_PENCIL_SUBDIV:
:   Subdivide.

    Grease Pencil subdivide modifier.

GREASE_PENCIL_ENVELOPE:
:   Envelope.

    Create an envelope shape.

GREASE_PENCIL_OUTLINE:
:   Outline.

    Convert stroke to outline.

**Deform**

ARMATURE:
:   Armature.

    Deform the shape using an armature object.

CAST:
:   Cast.

    Shift the shape towards a predefined primitive.

CURVE:
:   Curve.

    Bend the mesh using a curve object.

DISPLACE:
:   Displace.

    Offset vertices based on a texture.

HOOK:
:   Hook.

    Deform specific points using another object.

LAPLACIANDEFORM:
:   Laplacian Deform.

    Deform based a series of anchor points.

LATTICE:
:   Lattice.

    Deform using the shape of a lattice object.

MESH_DEFORM:
:   Mesh Deform.

    Deform using a different mesh, which acts as a deformation cage.

SHRINKWRAP:
:   Shrinkwrap.

    Project the shape onto another object.

SIMPLE_DEFORM:
:   Simple Deform.

    Deform the shape by twisting, bending, tapering or stretching.

SMOOTH:
:   Smooth.

    Smooth the mesh by flattening the angles between adjacent faces.

CORRECTIVE_SMOOTH:
:   Smooth Corrective.

    Smooth the mesh while still preserving the volume.

LAPLACIANSMOOTH:
:   Smooth Laplacian.

    Reduce the noise on a mesh surface with minimal changes to its shape.

SURFACE_DEFORM:
:   Surface Deform.

    Transfer motion from another mesh.

WARP:
:   Warp.

    Warp parts of a mesh to a new location in a very flexible way thanks to 2 specified objects.

WAVE:
:   Wave.

    Adds a ripple-like motion to an object’s geometry.

VOLUME_DISPLACE:
:   Volume Displace.

    Deform volume based on noise or other vector fields.

GREASE_PENCIL_HOOK:
:   Hook.

    Deform stroke points using objects.

GREASE_PENCIL_NOISE:
:   Noise.

    Generate noise wobble in Grease Pencil strokes.

GREASE_PENCIL_OFFSET:
:   Offset.

    Change stroke location, rotation, or scale.

GREASE_PENCIL_SMOOTH:
:   Smooth.

    Smooth Grease Pencil strokes.

GREASE_PENCIL_THICKNESS:
:   Thickness.

    Change stroke thickness.

GREASE_PENCIL_LATTICE:
:   Lattice.

    Deform strokes using a lattice object.

GREASE_PENCIL_DASH:
:   Dot Dash.

    Generate dot-dash styled strokes.

GREASE_PENCIL_ARMATURE:
:   Armature.

    Deform stroke points using armature object.

GREASE_PENCIL_SHRINKWRAP:
:   Shrinkwrap.

    Project the shape onto another object.

**Physics**

CLOTH:
:   Cloth.

    Physic simulation for cloth.

COLLISION:
:   Collision.

    For colliders participating in physics simulation, control which level in the modifier stack is used as the collision surface.

DYNAMIC_PAINT:
:   Dynamic Paint.

    Turn objects into paint canvases and brushes, creating color attributes, image sequences, or displacement.

EXPLODE:
:   Explode.

    Break apart the mesh faces and let them follow particles.

FLUID:
:   Fluid.

    Physics simulation for fluids, like water, oil and smoke.

OCEAN:
:   Ocean.

    Generate a moving ocean surface.

PARTICLE_INSTANCE:
:   Particle Instance.

    Duplicate mesh at the location of particles.

PARTICLE_SYSTEM:
:   Particle System.

    Spawn particles from the shape.

SOFT_BODY:
:   Soft Body.

    Simulate soft deformable objects.

SURFACE:
:   Surface.