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.. _camera_guide: |
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Creating Cameras |
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Pyrender supports three camera types -- :class:`.PerspectiveCamera` and |
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:class:`.IntrinsicsCamera` types, |
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which render scenes as a human would see them, and |
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:class:`.OrthographicCamera` types, which preserve distances between points. |
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Creating cameras is easy -- just specify their basic attributes: |
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>>> pc = pyrender.PerspectiveCamera(yfov=np.pi / 3.0, aspectRatio=1.414) |
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>>> oc = pyrender.OrthographicCamera(xmag=1.0, ymag=1.0) |
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For more information, see the Khronos group's documentation here_: |
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.. _here: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#projection-matrices |
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When you add cameras to the scene, make sure that you're using OpenGL camera |
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coordinates to specify their pose. See the illustration below for details. |
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Basically, the camera z-axis points away from the scene, the x-axis points |
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right in image space, and the y-axis points up in image space. |
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.. image:: /_static/camera_coords.png |
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