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OpenUSD Exchange Samples: createCameras

This sample demonstrates how to open/create a stage with key metadata and create cameras using the OpenUSD Exchange SDK.

  • Create a telephoto camera with a long lens and large aperture (narrow depth of field)
  • Create a wide angle camera with a small aperture

USD Modules

The Gf, Sdf, and Usd modules are used

OpenUSD Exchange SDK functions

  • createStage()
  • defineCamera()
  • getValidChildNames()
  • saveStage()
  • setLocalTransform()

Languages

This sample is implemented in both C++ and Python. To run:

  • [./]run.[bat, sh] createCameras
  • [./]python.[bat, sh] source/createCameras/createCameras.py

Hardcoded items

  • If a stage is created, it has a default prim named "World", Y-up axis, 1 cm linear units
  • Create a camera with a focal length of 100 mm with an fStop of 1.4 20 m from the origin of the stage
  • Create a camera with a focal length of 3.5 mm with an fStop of 32 about 2.5 m from the origin of the stage

Command Line Arguments

Usage:
  createCameras [OPTION...]

  -a, --usda          Output a text stage rather than binary
  -h, --help          Print usage
  -p, --path arg      Alternate destination stage path (default: c:/Users/username/AppData/Local/Temp/usdex/sample.usdc)