vispy.visuals.isoline module#

class vispy.visuals.isoline.IsolineVisual(vertices=None, tris=None, data=None, levels=None, color_lev=None, **kwargs)#

Isocurves of a tri mesh with data at vertices at different levels.

Parameters:

verticesndarray, shape (Nv, 3) | None: Vertex coordinates.
trisndarray, shape (Nf, 3) | None: Indices into the vertex array.
datandarray, shape (Nv,) | None: scalar at vertices
levelsndarray, shape (Nlev,) | None: The levels at which the isocurve is constructed from “data”.
color_levColor, tuple, colormap name or array: The color to use when drawing the line. If an array is given, it must be of shape (Nlev, 4) and provide one rgba color by level.
**kwargsdict: Keyword arguments to pass to LineVisual.

property levels#: The threshold at which the isocurves are constructed from the data.

set_color(color)#

Set the color

Parameters:

set_data(vertices=None, tris=None, data=None)#

Set the data

Parameters:

vispy.visuals.isoline.iso_mesh_line(vertices, tris, vertex_data, levels)#

Generate an isocurve from vertex data in a surface mesh.

Parameters:

verticesndarray, shape (Nv, 3): Vertex coordinates.
trisndarray, shape (Nf, 3): Indices of triangular element into the vertices array.
vertex_datandarray, shape (Nv,): data at vertex.
levelsndarray, shape (Nl,): Levels at which to generate an isocurve

Returns:

linesndarray, shape (Nvout, 3): Vertex coordinates for lines points
connectsndarray, shape (Ne, 2): Indices of line element into the vertex array.
vertex_level: ndarray, shape (Nvout,): level for vertex in lines

Notes

Uses a marching squares algorithm to generate the isolines.