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Lachlan Grose
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Sep 13, 2021
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from .model_plotter import BaseModelPlotter | ||
from LoopStructural.utils import getLogger | ||
from LoopStructural.utils import LoopImportError | ||
from LoopStructural.modelling.features import GeologicalFeature | ||
logger = getLogger(__name__) | ||
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import numpy as np | ||
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try: | ||
import meshio | ||
except ImportError: | ||
raise ImportError("Cannot use VtkExporter without meshio") | ||
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class VtkExporter(BaseModelPlotter): | ||
def __init__(self,model, file_name, bounding_box=None, nsteps=None, **kwargs): | ||
logger.info("VtkExporter") | ||
super().__init__(model) | ||
self.bounding_box = bounding_box | ||
self.nsteps = nsteps | ||
if model is not None: | ||
self.bounding_box = model.bounding_box | ||
self.nsteps = model.nsteps | ||
logger.debug("Using bounding box from model") | ||
if self.bounding_box is None or self.nsteps is None: | ||
logger.error("Plot area has not been defined.") | ||
self.bounding_box = np.array(self.bounding_box) | ||
self.file_name = file_name | ||
def _add_surface(self, | ||
vertices, | ||
faces, | ||
name, | ||
colour='red', | ||
paint_with=None, | ||
paint_with_value=None, | ||
**kwargs | ||
): | ||
"""Virtual function to be overwritten by subclasses for adding surfaces to the viewer | ||
Parameters | ||
---------- | ||
faces : numpy array | ||
indices of the triangles | ||
vertices : numy array | ||
vertices of the surface | ||
name : string | ||
name of the surface in the viewer | ||
colour : str, optional | ||
matplotlib colour, by default 'red' | ||
paint_with : GeologicalFeature, optional | ||
geological feature to evaluate on vertices, by default None | ||
""" | ||
point_data = {} | ||
if paint_with_value is not None: | ||
paint_with = paint_with_value | ||
if paint_with is not None: | ||
# add a property to the surface nodes for visualisation | ||
# calculate the mode value, just to get the most common value | ||
surfaceval = np.zeros(vertices.shape[0]) | ||
if isinstance(paint_with,GeologicalFeature): | ||
surfaceval[:] = paint_with.evaluate_value(self.model.scale(vertices,inplace=False)) | ||
if callable(paint_with): | ||
surfaceval[:] = paint_with(self.model.scale(vertices)) | ||
if isinstance(paint_with,(float,int)): | ||
surfaceval[:] = paint_with | ||
point_data = {"surfaceval":surfaceval} | ||
# write points to paraview, set the point data to the property being painted. | ||
# TODO allow multiple properties | ||
meshio.write_points_cells('{}_{}.vtk'.format(self.file_name,name.split('.')[0]), | ||
vertices, | ||
[("triangle", faces)], | ||
point_data=point_data | ||
) | ||
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def _add_points(self, points, name, value= None, **kwargs): | ||
"""Virtual function to be overwritten by subclasses for adding points to the viewer | ||
Parameters | ||
---------- | ||
points : np.array | ||
location of the points | ||
name : str | ||
name of the points in the viewer | ||
value : np.array, optional | ||
value to assign to the points | ||
""" | ||
logger.warning("Cannot export point data to vtk") | ||
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# if points.shape[0] < 1: | ||
# raise ValueError("Points array must have at least one element") | ||
# if name is None: | ||
# name = 'Unnamed points' | ||
# point_data = {} | ||
# if value is not None: | ||
# point_data = {"value":value} | ||
# meshio.write_points_cells('{}_{}.vtk'.format(self.file_name,name.split('.')[0]), | ||
# points, | ||
# point_data=point_data | ||
# ) | ||
def _add_vector_marker(self, location, vector, name, symbol_type='arrow',**kwargs): | ||
"""Virtual function to be overwritten by subclasses for adding vectors to the viewer | ||
Parameters | ||
---------- | ||
location : numpy array | ||
location array | ||
vector : numpy array | ||
vector component array | ||
symbol_type : str, optional | ||
type of glyph to display the vector by, by default 'arrow' | ||
name : string | ||
name of the object in the visualisation | ||
""" | ||
logger.warning("Cannot export vector field to vtk") | ||
pass | ||
# if location.shape[0] != vector.shape[0]: | ||
# raise ValueError("Location and vector arrays must be the same length") | ||
# if location.shape[0] < 1: | ||
# raise ValueError("Location array must have at least one element") | ||
# if name is None: | ||
# name = 'Unnamed points' | ||
# if symbol_type == 'arrow': | ||
# vectorfield = self.lv.vectors(name, **kwargs) | ||
# vectorfield.vertices(location) | ||
# vectorfield.vectors(vector) | ||
# elif symbol_type == 'disk': | ||
# scaleshapes = kwargs.get('scaleshapes',np.max(self.model.maximum-self.model.origin)*0.014) | ||
# vector /= np.linalg.norm(vector, axis=1)[:, None] | ||
# vectorfield = self.lv.shapes(name, scaleshapes=scaleshapes,shapelength=0,**kwargs) | ||
# vectorfield.vertices(location) | ||
# vectorfield.vectors(vector) |