X3002¶
(BROCARD AXIS)∩(GERGONNE LINE)
X3002 ((BROCARD AXIS)∩(GERGONNE LINE)) constructed on acute reference triangle \((a, b, c) = (5, 6, 7)\) with unit baseline AB = \(1\).¶
"""GEOMETOR construction model for X_3002 = (BROCARD AXIS)∩(GERGONNE LINE)."""
from __future__ import annotations
from pathlib import Path
import sympy.geometry as spg
from geometor.model import Model
from geometor.etc.ops import (
central_line,
circumcenter_of,
construct_baseline_triangle,
create_model,
eval_trilinear_point,
intersect_lines,
promote_point_to_top,
symmedian_point_of,
)
from geometor.etc.render import write_center_svg
def construct_x_03002(
model: Model, A: spg.Point, B: spg.Point, C: spg.Point
) -> spg.Point:
"""Construct X_3002 = (BROCARD AXIS)∩(GERGONNE LINE) on reference triangle ABC."""
X_3 = circumcenter_of(model, A, B, C, ID="X_3", classes=["center"])
X_6 = symmedian_point_of(model, A, B, C, ID="X_6", classes=["center"])
X_241 = eval_trilinear_point(model, A, B, C, '(cos(B/2))**(4) - ((cos(A/2))**(2))*((cos(B/2))**(2) +(cos(C/2))**(2)) + (cos(C/2))**(4)', ID="X_241", classes=["center"])
X_514 = eval_trilinear_point(model, A, B, C, '(b - c)/a', ID="X_514", classes=["center"])
central_line(model, X_3, X_6, 3, 6)
central_line(model, X_241, X_514, 241, 514)
X_3002 = intersect_lines(model, X_3, X_6, X_241, X_514, ID="X_3002", classes=["selected", "target"])
X_36 = eval_trilinear_point(model, A, B, C, '1 - 2*cos(A)', ID="X_36", classes=["center", "incident"])
X_1951 = eval_trilinear_point(model, A, B, C, 'a*((cos(A))**(2) - cos(B)*cos(C))', ID="X_1951", classes=["center", "incident"])
central_line(model, X_36, X_1951, 36, 1951, incident=True)
return promote_point_to_top(model, X_3002)
def build_model(
sides: tuple[float, float, float] = (5.0, 6.0, 7.0),
show_guides: bool = False,
) -> Model:
"""Build a `geometor.model.Model` for X_3002 on the given reference triangle."""
model = create_model('X_3002 = (BROCARD AXIS)∩(GERGONNE LINE)')
A, B, C = construct_baseline_triangle(model, *sides, show_guides=show_guides)
construct_x_03002(model, A, B, C)
return model
if __name__ == "__main__":
here = Path(__file__).resolve().parent
model_acute = build_model((5.0, 6.0, 7.0))
model_acute.save(str(here / "x-03002.json"))
write_center_svg(
model_acute,
here / "x-03002.svg",
subtitle="(a, b, c) = (5, 6, 7) | AB = 1",
)