Return a list of CanvasBackends. Returns ------- list A list with CanvasBackends.

Get screen DPI from the OS Parameters ---------- raise_error : bool If True, raise an error if DPI could not be determined.

Get a global context. Note that any assumptions about OpenGL state being local will not hold.

Load an image from the demo-data repository if possible. Otherwise, just return a randomly generated image.

Get the lines for this function based on the given backend. The given API call is inserted at the correct location.

Get the total bounds based on the visuals present in the scene Parameters ---------- dim : int | None Dimension t

Get the current view state of the camera Returns a dict of key-value pairs. The exact keys depend on the camera. Can be passed to set

The available GL state :data:`presets <.GL_PRESETS>`. Returns ------- presets : dict The dictionary of presets us

Get vertex colors Parameters ---------- indexed : str | None If None, return an array (Nv, 4) of vertex colors.

Get vertex colors Parameters ---------- indexed : str | None If None, return an array (Nv,) of vertex values.

Get words on a line.

Determine if a suitable app backend exists

Return True if this data set has vertex value information

Save image data to disk Requires imageio or PIL. Parameters ---------- filename : str Filename to write. im : array

Returns q.conjugate()/q.norm()**2 So if the quaternion is unit length, it is the same as the conjugate.

Link the complete program and check. All shaders are detached and deleted if the program was successfully linked.

List system fonts Returns ------- fonts : list of str List of system fonts.

Load an image of a crate Returns ------- crate : array 256x256x3 crate image.

Factory function for creating new cameras using a string name. Parameters ---------- cam_type : str May be one of: *

Make this the currently active context.

Return image array showing the differences between im1 and im2. Handles images of different shape. Alpha channels are not compared.

Map coordinates Parameters ---------- coords : array-like Coordinates to map. Returns -------

Normalize values to match in-shader representation of this shader. Parameters ---------- val : int | float | ndarray

Parse a list of commands.

Parse this annotations file and produce a dictionary of FunctionAnnotation objects.

Plot a series of data using lines and markers Parameters ---------- data : array | two arrays Arguments can be pa

The position of canvas/window relative to screen.

Add a new transform to the beginning of this chain. Parameters ---------- tr : instance of Transform The

Define the set of GL state parameters to use when drawing. The arguments are forwarded to :func:`vispy.gloo.wrappers.set_state`. Thi

Serialize this mesh to a string appropriate for disk storage Returns ------- state : dict The state.

Save configuration keys to vispy config file Parameters ---------- **kwargs : keyword arguments Key/value pairs to save to the co

Non-uniform scaling along the x, y, and z axes Parameters ---------- s : array-like, shape (3,) Scaling in x, y, z. dtype : d

Scale the matrix about a given origin. The scaling is applied *after* the transformations already present in the matrix.

Get line point close to mouse pointer and its index Parameters ---------- event : the mouse event being processed

Set the color Parameters ---------- color : instance of Color The color to use.

Toggle writing of frame buffer color components Parameters ---------- red : bool Red toggle. green : bool

Set the data Parameters ---------- pos : float Position of the line along the axis. color : list, tuple,

Set the scalar array data Parameters ---------- data : ndarray A 3D array of scalar values. The isosurface is con

Set the physical size of the canvas.

Context manager to temporarily set picking for this node and its children. Note that this function will not alter the picking mode unless/unt

Set the scale and units used to calculate depth values Parameters ---------- factor : float Scale factor used to