compas_vol

Volumetric Modelling

volumetric modeling with signed distance functions

Installation Instructions

• compas_vol is an extension package built on top of compas core.
• To get started, I recommend you create a separate environment in an Anaconda Python 3.7 installation. The details are described here: https://compas-dev.github.io/main/gettingstarted/installation.html
• With the newly created environment active, make sure you have git installed. If not, in the terminal (Mac) or Anaconda Prompt (Win) run conda install git.
• Then install compas_vol directly from source, running pip install git+https://github.com/dbt-ethz/compas_vol
• The example notebooks use meshplot for isosurfacing and mesh display. Install it with conda install meshplot
• Some also use ipyvolume. Install it with conda install -c conda-forge ipyvolume

Example

from compas.geometry import Box, Frame, Point
from compas_vol.primitives import VolBox
import numpy as np

box = Box(Frame(Point(0, 0, 0), [1, 0.2, 0], [-0.1, 1, 0]), 20, 15, 15)
vb = VolBox(box, 3.0)

x, y, z = np.ogrid[-15:15:60j, -15:15:60j, -15:15:60j]
d = vb.get_distance_numpy(x, y, z)

Functionality

All the objects have a get_distance function, a lot of them also have a faster get_distance_numpy function. The following table gives an overview:

Folder	Class	Single point distance	Numpy available
Primitives	VolBox	√	√
"	VolCapsule	√	√
"	VolCone	√	X
"	VolEllipsoid	√	√
"	VolExtrusion	√	X
"	Heart	√	X
"	GDF	X	X
"	VolPlane	√	√
"	VolPolyhedron	√	√
"	VolSphere	√	√
"	VolTorus	√	√
Combinations	Intersection	√	√
"	Subtraction	√	√
"	Union	√	√
"	Morph	√	√
"	SmoothIntersection	√	√
"	SmoothSubtraction	√	√
"	SmoothUnion	√	√
Modifications	Blur	X	√
"	Overlay	√	√ (but missing import)
"	MultiShell	√	√
"	Shell	√	√
"	Transformation	√	√
"	Twist	√	√
Microstructure	Lattice	√	√
"	TPMS	√	√
"	TPMSPolar	√	√
"	Voronoi	√	X
Meshing	Octree	√	X
Analysis	Gradient	√	√