Curve Comparison 1

../_images/example_curve_comparison1.png 
from compas.geometry import Point
from compas.geometry import Polyline, Bezier
from compas_occ.geometry import OCCNurbsCurve
from compas_view2.app import App


points = [Point(0, 0, 0), Point(1, 3, 0), Point(2, 0, 0)]
bezier = Bezier(points)

points = [Point(3, 0, 0), Point(4, 3, 0), Point(5, 0, 0)]

curve1 = OCCNurbsCurve.from_parameters(
    points=points,
    weights=[1.0, 1.0, 1.0],
    knots=[0.0, 1.0],
    multiplicities=[3, 3],
    degree=2,
)

curve2 = OCCNurbsCurve.from_parameters(
    points=points,
    weights=[1.0, 2.0, 1.0],
    knots=[0.0, 1.0],
    multiplicities=[3, 3],
    degree=2,
)

curve3 = OCCNurbsCurve.from_parameters(
    points=points,
    weights=[1.0, 1.0, 1.0],
    knots=[0.0, 1.0, 2.0, 3.0, 4.0, 5.0],
    multiplicities=[1, 1, 1, 1, 1, 1],
    degree=2,
)

# ==============================================================================
# Visualisation
# ==============================================================================

view = App()

view.add(
    Polyline(bezier.points),
    show_points=True,
    pointsize=20,
    pointcolor=(1, 0, 0),
    linewidth=1,
    linecolor=(0.3, 0.3, 0.3),
)
view.add(Polyline(bezier.locus()), linewidth=5, linecolor=(0, 0, 0))

view.add(
    Polyline(curve1.points),
    show_points=True,
    pointsize=20,
    pointcolor=(1, 0, 0),
    linewidth=1,
    linecolor=(0.3, 0.3, 0.3),
)
view.add(Polyline(curve1.locus()), linewidth=5, linecolor=(0, 0, 0))
view.add(Polyline(curve2.locus()), linewidth=5, linecolor=(0, 1, 1))
view.add(Polyline(curve3.locus()), linewidth=5, linecolor=(0, 0, 1))

view.run()