meshula

SON OF USD BUILD CLUB

Building a native Apple Silicon version of UsdView

This version of UsdView will have an Apple Silcon, Metal-native viewer, openimageio, and alembic support. It does not yet include MaterialX, OpenColorIO, or any of the other many options build_usd.py supports.

Successfully get usdview running on conda and M1 as follows:

Using the PySide6 PR by Jon Creighton

meshula

rapid |  hot fix                    animation tools
      |  one off pipeline hacks     simulation tools
      |  one off task UI            nodes for procedural graphs
      |                             build systems
      |                             rigging systems
      |
      |
slow  |  looks                      foundational architecture

meshula

notes from Siggraph 2022, USD Industry Council, Aaron Luk moderating

• ifc requested by many https://en.wikipedia.org/wiki/Industry_Foundation_Classes although it sounds like many consider it to be on a ramp to obsolence

• discussion of an "interning" schema for IoT data streams bridged via fabric or directly into usd available in usd via dynamic payload

meshula

• https://github.com/jarro2783/cxxopts - couple thousand of lines, slightly prickly
• getopt - dynamic link rather than bundle code
• https://github.com/clibs/flag - c, compilable by C++ with a tweak
• https://github.com/tanakh/cmdline - similar to cli11
• cli11 - best interface, easy to use, rather big codebase
• https://github.com/cofyc/argparse - small, modest, easy to use
• https://github.com/p-ranav/argparse - small, mimics python's parser, easy to use, C++17

meshula

Classic films curated by Ralph Egglestein, 1920s-60s https://archives-library.pixar.com/collections/76-classic-films

• 12 Angry Men
• The 400 Blows
• 42nd St
• 5 fingers
• Above Suspicion
• All About Eve
• All Quiet on the Western Front

meshula

You need to build a system three times

• the first time you don't know what you actually need, it's an exploration, plan to throw it away
• the second time you think you know what you need so you over-architect, it'll be too restrictive, plan to throw it away
• the third time you build what actually works

I like to think I came up with it at LucasArts twenty years ago, but at this point I don't know if it was generally in the zeitgeist.

meshula

class PBRMesh {
    var mtkMesh : MTKMesh?

    var submeshes = [PBRSubmesh?]()
    // create an array with 3 entries initialized to nil
    //   swift doesn't have fixed size object arrays
    var pipeline = [PBRModel_Pipeline?](repeating: nil, count: 3)

    

meshula

#include "OpenEXRCore/attributes.c"
#include "OpenEXRCore/base.c"
#include "OpenEXRCore/channel_list.c"
#include "OpenEXRCore/chunk.c"
#include "OpenEXRCore/coding.c"
#include "OpenEXRCore/context.c"
#include "OpenEXRCore/debug.c"
#include "OpenEXRCore/decoding.c"
#include "OpenEXRCore/encoding.c"

meshula

• install Windows Terminal from Windows Store
• install WSL with Ubuntu 22.04 lTS
• start ubuntu terminal
• sudo apt install git
• set git to globally suppress auto-crlf, and also set your name and email address in the config
• create a new SSH key
• start ssh-agent
• install visual studio 2022
• start windows cmd terminal
• type where python to find the monumentally inconvenient python helper

meshula

import SwiftUI

enum OSDocumentError: Error {
    case unknownFileFormat
}

#if canImport(UIKit)

import UIKit