Create and set positions and texture coords from the given shape We have six faces with 1 quad (2 triangles) each, resulting in 6*2*3

Compute the z-component of the cross product of (arrays of) 2D vectors. This is meant to replicate the 2D functionality of np.cross(), which is

Generate linearly spaced control points from a set of colors.

Expose a new frame to the canvas. This will call self.redraw() internally. The self.animate sets the refresh rate in milliseconds. U

Called when a dependency's expression has changed.

Helper function to actuall construct the tree

Convert mouse x, y movement into x, y, z translations

Do any pending text writes

Return True if *edge* is below the current front. One of the points in *edge* must be _on_ the front, at *front_index*.

Return the index where *edge* appears in the current front. If the edge is not in the front, return -1

Return the edges in *tri*, excluding *edge*.

Start profiling and register callback to print stats when the program exits.

Update system using Euler's method (equivalent to order 1 Runge-Kutta Method).

Load requested file, downloading it if needed or requested Parameters ---------- url: string The url of file to be downloaded.

Test if region (width, height) fit into self._atlas_nodes[index]

This functions checks if we a running test with the osmesa backends and fix the GL library if needed. Since we have to fix the VISPY_GL_

Calculates and returns the tangents, normals and binormals for the tube.

Get the name.

Return a list giving the order to draw visuals. Each node appears twice in the list--(node, True) appears before the node's children

Retrieve active attributes and uniforms to be able to check that all uniforms/attributes are set by the user. Other GLIR implementatio

Get error and show the faulty line + some context Other GLIR implementations may omit this.

Try getting the given function from PyOpenGL, return a dummy function (that shows a warning when called) if it could not be found.

Return a 1D array of picking IDs for the vertices in the visual. Generally, this method should be implemented to: 1. Calculate th

Return code, with new name, expressions, and replacements applied.

Return a rotation matrix based on camera parameters

Return a rotation matrix based on camera parameters

Return the interactive framework whose event loop is currently running, if any, or "headless" if no event loop can be started, or None. R

Get the major ticks, minor ticks, and major labels

Deal with compatibility; desktop does not have sprites enabled by default. ES has.

Helper for prining errors in callbacks See EventEmitter._invoke_callback for a use example.

Convert hex to rgba, permitting alpha values in hex

Create global Config object, parse command flags.

Initialise the Canvas for drawing.

Copy functions from OpenGL.GL into _pyopengl namespace.

Inject functions and constants from PyOpenGL but leave out the names that are deprecated or that we provide in our API.

Given a list of *edges*, return the first that is intersected by *cut_edge*.

Convert Nx3 or Nx4 lab to rgb