P24: GN SCATTER & DISTRIBUTION

ID: P24 | Кластер: Geometry Nodes | Сложность: ⭐⭐ | Теги: #scatter #poisson-disk #density #weight-paint #lod

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🎯 ЦЕЛЬ

Продвинутое рассеивание: density attribute, weight paint, random pick, LOD по дистанции

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📝 ПРОМПТ (РУС)

Рассей коллекцию "[COLL]" по "[TARGET]":
Density: [attribute/значение], Count [N], Scale [min-max], Seed [S]

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📝 ПРОМПТ (ENG)

Scatter collection "[COLL]" on "[TARGET]":
Density: [attribute/value], Count [N], Scale [min-max], Seed [S]

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🔧 MCP: execute_blender_code

import bpy

def gn_scatter_advanced(target, collection, density_attr="", count=1000, smin=0.8, smax=1.2, seed=42):
    obj = bpy.data.objects.get(target)
    coll = bpy.data.collections.get(collection)
    if not obj or not coll:
        raise ValueError("Target or collection not found")
    ng = bpy.data.node_groups.new("GN_ScatterAdv", 'GeometryNodeTree')
    nodes, links = ng.nodes, ng.links
    nodes.clear()
    inp = nodes.new('NodeGroupInput'); out = nodes.new('NodeGroupOutput')
    inp.location = (-500, 0); out.location = (500, 0)
    ng.interface.new_socket(name="Density", in_out='INPUT', socket_type='NodeSocketFloat')
    ng.interface.new_socket(name="Seed", in_out='INPUT', socket_type='NodeSocketInt')
    ng.interface.new_socket(name="Geometry", in_out='OUTPUT', socket_type='NodeSocketGeometry')
    dist = nodes.new('GeometryNodeDistributePointsOnFaces')
    dist.location = (-200, 0)
    dist.distribute_method = 'POISSON'
    if density_attr:
        dist.inputs['Density Attribute'].default_value = density_attr
    inst = nodes.new('GeometryNodeInstanceOnPoints')
    inst.location = (0, 0)
    rnd_scale = nodes.new('GeometryNodeRandomValue')
    rnd_scale.data_type = 'FLOAT_VECTOR'
    rnd_scale.location = (-200, -200)
    rnd_scale.outputs[0].default_value = (smin, smin, smin)
    rnd_scale.outputs[1].default_value = (smax, smax, smax)
    links.new(rnd_scale.outputs['Value'], inst.inputs['Scale'])
    real = nodes.new('GeometryNodeRealizeInstances')
    real.location = (300, 0)
    links.new(dist.outputs['Points'], inst.inputs['Points'])
    links.new(inst.outputs['Instances'], real.inputs['Geometry'])
    links.new(real.outputs['Geometry'], out.inputs['Geometry'])
    mod = obj.modifiers.new("GN_Scatter", 'NODES')
    mod.node_group = ng
    mod["Input_1"] = count
    mod["Input_2"] = seed
    return {"scatter": collection, "target": target}

# gn_scatter_advanced("Ground", "Trees", density_attr="Density", count=2000)

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🔗 СВЯЗИ

• Прочие в категории «Промпты»: P07: INSTANCING & ARRAYS, P22: PARTICLE SYSTEMS, P23: GEOMETRY NODES BASICS, P25: PROCEDURAL BUILDING GENERATOR, P30: OPTIMIZATION (SCENE & RENDER)
• По темам: P45: GEOMETRY NODES SIMULATION ZONES, CASE 05: PROCEDURAL CITY, P01: PRIMITIVE CREATION BASICS
• Теги: #density, #geometry-nodes, #lod, #poisson, #poisson-disk, #prompt, #scatter, #weight, #weight-paint