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Rendering Tools
===============
.. module:: chroma
There are three different ways to render a geometry: you can explicitly create a :class:`Camera` instance, call the function :func:`view`, or use the script `chroma-cam`.
Example:
>>> chroma.view(chroma.make.cube())
.. image:: images/cube.png
:height: 100px
To control the camera refer to the following table and :ref:`camera_hotkeys`.
.. _camera_controls:
============== =========== ===========================
Thing You Do Modifier Thing That Happens
============== =========== ===========================
click and drag rotate camera around object
click and drag shift translate camera
click and drag control rotate camera
mouse wheel zoom
============== =========== ===========================
.. _camera_hotkeys:
Camera Hotkeys
--------------
========= ===============================
Command Thing That Happens
========= ===============================
alt toggle fine motion
F11 toggle fullscreen
escape quit
= increase the alpha depth by one
\- decrease the alpha depth by one
pagedown move down through the bounding volume hierarchy tree
pageup move up through the bounding volume hierarchy tree
3 toggle 3d mode
g toggle 3d colors between red/cyan and green/magenta
F12 take a screenshot
m make a movie
F5 [#f1]_ toggle hybrid monte carlo rendering mode
F6 [#f2]_ place a light source at the camera's current location
F7 [#f2]_ add another light source at the camera's current location
========= ===============================
.. rubric:: Footnotes
.. [#f1] The hybrid monte carlo rendering mode requires the geometry have surfaces with a non-zero diffuse reflection probability.
.. [#f2] Only available in hybrid monte carlo rendering mode.
The Camera Class
----------------
.. class:: Camera(geometry, size=(800,600), device_id=None)
The :class:`Camera` class uses :mod:`pygame` to render a geometry.
:class:`Camera` objects inherit from :class:`multiprocessing.Process` so
that you can render multiple geometries in separate windows at the same
time.
.. method:: start()
Create a :mod:`pygame` window, intialize CUDA, and start the camera.
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