jamesrobinsonvfx

import contextlib


@contextlib.contextmanager
def set_read_only_parm(parm):
    if not isinstance(parm, (hou.Parm, hou.ParmTuple)):
        return
    # Unlock the parm
    parm.lock(False)
    

jamesrobinsonvfx

"""Disable When / Hide When Expressions

Used to control parameter visibility.
"""

# Hide When Expression
{ expanded == 1 }


# Hide When Expression (multiparm)

jamesrobinsonvfx

items = ["raspberry", "grape"]
return [x for y in [(x, x) for x in items] for x in y]

# ["raspberry", "raspberry", "grape", "grape"]

# Or fancier
[x for y in [(x, x.title()) for x in presets] for x in y]

# ["raspberry", "Raspberry", "grape", "Grape"]

jamesrobinsonvfx

import re

import hou


def ftrimify(parm):
    """Wrap an ftrim() function around channel refs.

    Args:
        parm (hou.Parm): Parameter to add ftrim()s to. Should be a

jamesrobinsonvfx

// Match forearm, leftArm, and arm
@name=*[aA]rm

jamesrobinsonvfx

def toggle_manual():
    """Toggle cook mode"""
    current_mode = hou.updateModeSetting()
    auto = (hou.updateMode.AutoUpdate, hou.updateMode.OnMouseUp)
    toggle_cook = hou.shelves.tool("toggle_manual")
    toggle_cook.setLabel("Auto Update")
    if current_mode in auto:
        hou.setUpdateMode(hou.updateMode.Manual)
        toggle_cook.setIcon("MISC_cook")
    elif current_mode == hou.updateMode.Manual:

jamesrobinsonvfx

# Callbacks
idx = kwargs["script_multiparm_index"]

# In a parameter expression
idx = evaluatingParm().multiParmInstanceIndices[0] # Returns a tuple. Will need subscript for the right level, and test for IndexError

# In a parameter expression, better
import re
idx = re.match(r".+(\d+)$", evaluatingParm().name()).group(1)

jamesrobinsonvfx

import math
import os
import re


def timedelta(file1, file2):
    t1 = os.path.getmtime(file1)
    t2 = os.path.getmtime(file2)
    time = abs(t2 - t1) / 60.0
    min = math.floor(time)

jamesrobinsonvfx

// Get packed xform and pivot
matrix xform = getpackedtransform(0, i@ptnum);
vector pivot = primintrinsic(0, "pivot", i@ptnum);

//  Orient for instancing
p@orient = quaternion(matrix3(xform));

// Crack pscale
vector scale = cracktransform(0, 0, 2, 0, xform);
f@pscale = avg(scale);

jamesrobinsonvfx

import toolutils as tu

viewer = tu.sceneViewer()
viewports = viewer.viewports()
cam = hou.node("/obj/rendercam")

# There are always 4 viewports!
# https://www.sidefx.com/forum/topic/38171/#post-174454
for vp in viewports:
    vp.setCamera(cam)