P18: DRIVERS & CONSTRAINTS

ID: P18 | Кластер: Animation | Сложность: ⭐⭐ | Теги: #drivers #constraints #procedural #rig #automation

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🎯 ЦЕЛЬ

Процедурные связи: drivers (выражения) + constraints (Track To, Copy, Limit)

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📝 ПРОМПТ (РУС)

Добавь драйвер: "[OBJ].[PROP]" ← "[TARGET].[PROP]" выражение "[EXPR]"
Или constraint: [TYPE] на "[OBJ]" с целью "[TARGET]"
Пример: "Гир B rotation.z = -gear_a_rot * 2"

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📝 ПРОМПТ (ENG)

Add driver: "[OBJ].[PROP]" ← "[TARGET].[PROP]" expression "[EXPR]"
Or constraint: [TYPE] on "[OBJ]" targeting "[TARGET]"
Example: "Gear B rotation.z = -gear_a_rot * 2"

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🔧 MCP: execute_blender_code

import bpy

def add_driver(obj_name, prop_path, target_name, target_prop, expr="var"):
    obj = bpy.data.objects.get(obj_name)
    tgt = bpy.data.objects.get(target_name)
    if not obj or not tgt:
        raise ValueError("Objects not found")
    drv = obj.driver_add(prop_path).driver
    drv.type = 'SCRIPTED'
    var = drv.variables.new()
    var.name = "var"
    var.targets[0].id = tgt
    var.targets[0].data_path = target_prop
    drv.expression = expr
    return {"driver": f"{obj_name}.{prop_path} = {expr}"}

def add_track_to(obj_name, target_name):
    obj = bpy.data.objects.get(obj_name)
    tgt = bpy.data.objects.get(target_name)
    c = obj.constraints.new('TRACK_TO')
    c.target = tgt
    c.track_axis = 'TRACK_NEGATIVE_Z'
    c.up_axis = 'UP_Y'
    return {"constraint": "TRACK_TO"}

# Примеры:
# add_driver("Gear_B", "rotation_euler[2]", "Gear_A", "rotation_euler[2]", "-var * 2")
# add_track_to("Camera", "Empty_Target")

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📊 CONSTRAINTS ШПАРГАЛКА

Тип	Назначение
TRACK_TO	Камера смотрит на цель
COPY LOCATION/ROTATION/SCALE	Повторение трансформа
LIMIT LOCATION/ROTATION	Ограничители (двери, суставы)
FOLLOW PATH	Движение по кривой
CHILD OF	Временное родительство (оружие в руке)

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🔗 СВЯЗИ

• Прочие в категории «Промпты»: P34: CORRECTIVE SHAPE KEYS, P03: MODIFIERS STACK, P04: MESH EDITING (BMESH), P07: INSTANCING & ARRAYS, P19: NLA EDITOR WORKFLOW
• По темам: P23: GEOMETRY NODES BASICS, P25: PROCEDURAL BUILDING GENERATOR, P43: CAMERA SWITCHING & MARKERS
• Теги: #animation, #automation, #constraints, #drivers, #modeling, #procedural, #prompt, #rig