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https://github.com/meshula/tinyusd
A really small getting-started project for USD based projects
https://github.com/meshula/tinyusd
cmake tiny usd
Last synced: about 1 month ago
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A really small getting-started project for USD based projects
- Host: GitHub
- URL: https://github.com/meshula/tinyusd
- Owner: meshula
- License: mit
- Created: 2018-06-11T06:52:58.000Z (over 6 years ago)
- Default Branch: mac-monolithic
- Last Pushed: 2023-05-27T18:47:35.000Z (over 1 year ago)
- Last Synced: 2024-08-05T16:17:03.454Z (3 months ago)
- Topics: cmake, tiny, usd
- Language: CMake
- Homepage:
- Size: 13.9 MB
- Stars: 39
- Watchers: 9
- Forks: 3
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-openusd - Tiny USD program - started program for USD on Windows. (Learning / Technical Learning)
README
# Tiny USD
A tutorial on creating the smallest possible viable USD program, using
the dev branch of the official usd distribution.
In the spirit of minimalism, it skips Hydra, and Python bindings.
## Prerequisites
-------------
- git
- cmake 3.26 or greater installed for the command line
- Xcode command line tools, tested with Apple Clang 14
## Building
--------
Shallow clone the USD dev branch into this project's packages directory:
```sh
cd tinyusd
mkdir packages
cd packages
git clone --depth 1 https://github.com/PixarAnimationStudios/USD.git -b dev
```
### boost
Fetch boost and unarchive it. Boost will not be built, the headers as is are sufficient.
```sh
./get_boost.sh
```
### tbb
Fetch and build tbb. In the root directory:
```sh
./get_tbb.sh
```
### OpenSubdiv
If you are building USD with Hydra, you'll need OpenSubdiv.
```sh
./get_opensubdiv.sh
```
## Configure USD
-------------
Once again, starting in the packages directory:
```sh
mkdir usd-build;cd usd-build
```
We are going to build USD without python, as python adds complexity,
by requiring that boost python be built.
First, configure the build, from within the usd-build directory.
In the command below, replace the PREFIX and TOOLCHAIN variable values with
appropriate paths.
### with Hydra
```sh
cmake -DPXR_ENABLE_PYTHON_SUPPORT=OFF -DPXR_BUILD_MONOLITHIC=ON -DPXR_BUILD_DOCUMENTATION=OFF -DPXR_BUILD_TESTS=OFF -DCMAKE_INSTALL_PREFIX=.. -G "Xcode" ../USD
```
### without Hydra
```sh
cmake -DPXR_ENABLE_PYTHON_SUPPORT=OFF -DPXR_BUILD_MONOLITHIC=ON -DPXR_BUILD_DOCUMENTATION=OFF -DPXR_BUILD_TESTS=OFF -DPXR_BUILD_IMAGING=OFF -DCMAKE_INSTALL_PREFIX=.. -G "Xcode" ../USD
```
## Build USD
---------
```sh
cmake --build . --config Release --target install
```
## Finish up the installation
--------------------------
In a little while, packages/lib will contain the libusd_ms.dylib, and packages/include will have the headers, packages/bin will have sdfdump and sdffilter.
## Double check your work
----------------------
There is an executable in the bin directory called sdfdump. Running it
should result in the executable describing its input arguments, without any complaints of missing dylibs.
## TinyUsd
-------
Go back into the packages directory we made earlier, and create a tinyusd-build directory,
and cd into it.
```sh
mkdir tinyusd-build;cd tinyusd-build
```
Then, configure the cmake build files. Once again, make sure
the INSTALL_PREFIX and TOOLCHAIN variables are pointed appropriately.
```sh
cmake -G "Xcode" ../.. -DCMAKE_INSTALL_PREFIX=.. -DCMAKE_PREFIX_PATH=..
```
Build tinyusd.
```sh
cmake --build . --config Release --target install
```
Haven't got the rpath installation set up correctly in the cmake file yet, so go to the bin directory, and add it.
```sh
cd ../bin
install_name_tool -add_rpath ../lib tinyusd
```
Now, run tinyusd.
```sh
./tinyusd
```
Sanity check that tinyusd generated a file named test.usd, containing the following:
```usd
#usda 1.0
def Cube "Box"
{
float3 xformOp:scale = (5, 5, 5)
uniform token[] xformOpOrder = ["xformOp:scale"]
}
```