Python library for vectorized geometry maths.
Intended features:
Fast, vecorized computations on sets of geometry objects
Functions implemented in numpy and possibly cgal or other C libs
Object oriented geometries with complimentary methods
(Intersect(bezier1,linesegs1) Intersect(linesegs1,bezier1)
both use the same function under the hood.
Just-in-time computation and caching of properties (like
line normals, matrix determinants, etc.) to minimize
redundant or uneeded calculations.
Example usage (rudimentary ray casting):
import matplotlib.pyplot as plt
from composite_geometry import Lines2d
from base_geometry import Vec2d
from results import LineLineIntersect
#One dimensional collection of lines
n = 5
begins1 = np.random.randint(-25,25,(n,2))
ends1 = np.random.randint(-25,25,(n,2))
segs1 = Lines2d(begin=begins1,end=ends1)
#More complicated collection of lines
m=7
begins2 = np.random.randint(-25,25,(m,m,2))
ends2 =np.random.randint(-25,25,(m,m,2))
segs2 = Lines2d(begin=begins2,end=ends2)
#plot segments
xs,ys = export4mpl(segs1)
plt.plot(xs,ys,'b') #blue solid
xs,ys = export4mpl(segs2)
plt.plot(xs,ys,color='.70') #gray
xs,ys = export4mpl(segs2['begin'])
plt.plot(xs,ys,'ko') #black dots
#Set up result, but don't calculate
result = LineLineIntersect(segs1,segs2)
#plot all intersections
#pts = result.points['world']
#xs,ys =export4mpl(pts)
#plt.plot(xs,ys,'ro')
###plot segs1 from begining to first intersection###
#Get seg2's parameter of intersection
ub = result.points[segs2]
axis = 2 #Manually set axis of segs1. TODO: fix this
shortest = np.nanmin(ub.arr,axis=axis)
pts = segs2.eval_param(shortest)
##plot all first intersections
##xs,ys =export4mpl(pts)
##plt.plot(xs,ys,'ro')
#plot the lines from begining to first intersection.
short_lines = Lines2d(begin=segs2['begin'].arr, end=pts.arr)
xs,ys =export4mpl(short_lines)
plt.plot(xs,ys,'g') #solid green
plt.show()
Resulting Graph:
