3D Visualization with pyvista

Panel
1

Dear All,

can we make this code become panel since currently it show separate/standlone. I try to make the 3D grid but can not, kindly please advise:

import numpy as np
import pyvista as pv


rng = np.random.default_rng(seed=0)


def make_point_set():
    """Return an n by 3 numpy array of structured coordinates.

    The contents of this function can be ignored.
    """
    n, m = 29, 32
    x = np.linspace(-200, 200, num=n) + rng.uniform(-5, 5, size=n)
    y = np.linspace(-200, 200, num=m) + rng.uniform(-5, 5, size=m)
    xx, yy = np.meshgrid(x, y)
    A, b = 100, 100
    zz = A * np.exp(-0.5 * ((xx / b) ** 2.0 + (yy / b) ** 2.0))
    points = np.c_[xx.reshape(-1), yy.reshape(-1), zz.reshape(-1)]
    foo = pv.PolyData(points)
    foo.rotate_z(36.6, inplace=True)
    return foo.points


# Get the points as a 2D NumPy array (N by 3)
points = make_point_set()
points[0:5, :]
mesh = pv.StructuredGrid()
mesh.points = points
mesh.dimensions = (29, 32, 1)

# Create scalar data
scalars = mesh.points[:, 2]
mesh['elevation'] = scalars

plotter = pv.Plotter(window_size=[1200, 800])

# Add the main mesh
plotter.add_mesh(mesh, scalars='elevation', show_edges=True,
                 cmap='plasma', opacity=0.9, 
                 show_scalar_bar=True, scalar_bar_args={'title': 'Elevation'})

# Enhanced grid and axes
plotter.show_grid(color='gray', location='outer')
plotter.add_axes(interactive=True, line_width=5)

# Set multiple camera positions
plotter.camera_position = 'xy'  # Top-down view

# Add some text
plotter.add_text("Structured Grid - 29x32", position='upper_edge')

# Enable advanced interactions
plotter.enable_terrain_style(mouse_wheel_zooms=True)
plotter.enable_trackball_style()  # Alternative interaction style

# Show the interactive plot
plotter.show()

thanks

2

Hey,

adding this would put your plot in a panel app

import panel as pn

pn.extension()
pn.panel(plotter.render_window, sizing_mode="stretch_both").show()

However, you will notice we loose some features from pyvista (from what i experienced, most of everything else that the meshes).

There are a few posts about pyvista in panel, and they tend to all conclude this.

3

hi @tmoulignier ,

thanks for your suggestion. However I want to have the grid to be appear when convert to panel version like pyvista plot below:

image
image1483×1015 122 KB

it will be nice panel also support that so the 3D viewing more better with scale etc.

thanks

4

Yeah that was my meaning when i said we lose many things on the way to panel. I dont have enough knowledge to say why. Unless the panel team corrects me, you might be at a dead end.

That being said, there is a script to do 3d visualisation with bokeh. For your use case, it should be more than enough, did you see it?

5

thanks, but unfortunately there is not enough information i need with current limitation we have, for example there is no coordinate , scale , depth , etc which is more essential for my case.

hope panel team have workaround for that would be nice…