Scenes

What is a Scene?

Scenes are fundamental building blocks of Makie figures. A Scene is like a container for Plots and other Scenes. Scenes have Plots and Subscenes associated with them. Every Scene also has a transformation, made up of scale, translation, and rotation.

A Scene's plots can be accessed via scene.plots.

A Scene's subscenes (also called children) can be accessed through scene.children. This will return an Array of the Scene's child scenes. A child scene can be created by childscene = Scene(parentscene).

Any Scene with an axis also has a camera associated with it; this can be accessed through camera(scene), and its controls through cameracontrols(scene). More documentation about these is in the Cameras section.

Scene's also have configurable size/resolution. You can set the size in pixels by doing Scene(resolution = (500, 500)).

Any keyword argument given to the Scene will be propagated to its plots; therefore, you can set the palette or the colormap in the Scene itself.

Subscenes

A subscene is no different than a normal Scene, except that it is linked to a "parent" Scene. It inherits the transformations of the parent Scene, but can then be transformed independently of it.

Scene Attributes

• scene.clear = true: Scenes are drawn parent first onto the same image. If clear = true for a (sub)scene it will clear the previously drawn things in its region to its backgroundcolor. Otherwise the plots in scene will be drawn on top and the backgroundcolor will be ignored. Note that this is not technically an attribute but just a field of Scene.

• ssao = SSAO(bias = 0.025, blur=2, radius=0.5): Controls SSAO settings, see lighting documentation.

• resolution = (800, 600): Sets the size of the created window if the scene is the root scene.

Modifying A Scene

Makie offers mutation functions to scale, translate and rotate your Scenes on the fly.

translate!(scene::Transformable, xyz::VecTypes)
translate!(scene::Transformable, xyz...)

translate!(Accum, scene::Transformable, xyz...)

rotate!(Accum, scene::Transformable, axis_rot...)

rotate!(t::Transformable, axis_rot::Quaternion)
rotate!(t::Transformable, axis_rot::AbstractFloat)
rotate!(t::Transformable, axis_rot...)

scale!(t::Transformable, x, y)
scale!(t::Transformable, x, y, z)
scale!(t::Transformable, xyz)
scale!(t::Transformable, xyz...)

Updating the Scene

When the Scene is changed, you may need to update several aspects of it. Makie provides three main updating functions:

update_cam!(scene::SceneLike, area)

update_cam!(scene::SceneLike)

update_cam!(scene::Scene, eyeposition, lookat, up = Vec3f(0, 0, 1))

Events

Scenes have several pre-created event "hooks" (through Observables) that you can handle. These can be accessed through scene.events, which returns an Events struct.