VisibleTimeRange

Visible time range bounds for a specific timeline.

Fields fields

timeline

Type: non-null Utf8

Name of the timeline this applies to.

range

Type: non-null TimeRange

Time range to use for this timeline.

Arrow datatype arrow-datatype

Struct(
    "timeline": non-null Utf8
    "range": non-null Struct(
        "start": non-null Union(Dense,
            0: ("_null_markers": Null)
            1: ("CursorRelative": non-null Int64)
            2: ("Absolute": non-null Int64)
            3: ("Infinite": Null)
        )
        "end": non-null Union(Dense,
            0: ("_null_markers": Null)
            1: ("CursorRelative": non-null Int64)
            2: ("Absolute": non-null Int64)
            3: ("Infinite": Null)
        )
    )
)

Example example

Time-windowed trails (e.g. Trajectories) timewindowed-trails-eg-trajectories

"""Log line strips over time and view a sliding window, e.g. for trajectories."""

import math

import rerun as rr
import rerun.blueprint as rrb


def point(t: float, phase: float) -> list[float]:
    # Sample a point on a helix.
    angle = 0.5 * t + phase
    return [math.cos(angle), math.sin(angle), 0.1 * t]


rr.init("rerun_example_line_strips3d_time_window", spawn=True)

# Configure the visible time range in the blueprint.
# You can also override this per entity.
rr.send_blueprint(
    rrb.Spatial3DView(
        origin="/",
        time_ranges=rrb.VisibleTimeRange(
            "time",
            start=rrb.TimeRangeBoundary.cursor_relative(seconds=-5.0),
            end=rrb.TimeRangeBoundary.cursor_relative(),
        ),
    )
)

# Log the line strip increments with timestamps.
for i in range(600):
    t0 = i / 30.0
    t1 = (i + 1) / 30.0

    rr.set_time("time", duration=t1)
    rr.log(
        "trails",
        rr.LineStrips3D(
            [
                [point(t0, 0.0), point(t1, 0.0)],
                [point(t0, math.pi), point(t1, math.pi)],
            ],
            colors=[[255, 120, 0], [0, 180, 255]],
            radii=0.02,
        ),
    )
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