X3748¶
X1621com[n(MEDIAL)*n(INCENTRAL)]
X3748 (X1621com[n(MEDIAL)*n(INCENTRAL)]) constructed on acute reference triangle \((a, b, c) = (5, 6, 7)\) with unit baseline AB = \(1\).¶
"""GEOMETOR construction model for X_3748 = X_1621com[n(MEDIAL)*n(INCENTRAL)]."""
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_barycentric_point,
eval_trilinear_point,
incenter_of,
promote_point_to_top,
)
from geometor.etc.render import write_center_svg
def construct_x_03748(
model: Model, A: spg.Point, B: spg.Point, C: spg.Point
) -> spg.Point:
"""Construct X_3748 = X_1621com[n(MEDIAL)*n(INCENTRAL)] on reference triangle ABC."""
X_3748 = eval_barycentric_point(model, A, B, C, '(a*(2*a**(2) + b**(2) + c**(2) - 3*a*b - 3*a*c - 2*b*c))', ID="X_3748", classes=["selected", "target"])
X_1 = incenter_of(model, A, B, C, ID="X_1", classes=["center", "incident"])
X_3 = circumcenter_of(model, A, B, C, ID="X_3", classes=["center", "incident"])
central_line(model, X_1, X_3, 1, 3, incident=True)
X_210 = eval_trilinear_point(model, A, B, C, '(b + c)*(b + c - a)', ID="X_210", classes=["center", "incident"])
X_1001 = eval_trilinear_point(model, A, B, C, 'a**(2) - a*(b + c) - 2*b*c', ID="X_1001", classes=["center", "incident"])
central_line(model, X_210, X_1001, 210, 1001, incident=True)
X_42 = eval_trilinear_point(model, A, B, C, 'a*(b + c)', ID="X_42", classes=["center", "incident"])
X_1279 = eval_trilinear_point(model, A, B, C, '((b - c)**(2) - a*(b + c - 2*a))', ID="X_1279", classes=["center", "incident"])
central_line(model, X_42, X_1279, 42, 1279, incident=True)
return promote_point_to_top(model, X_3748)
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_3748 on the given reference triangle."""
model = create_model('X_3748 = X_1621com[n(MEDIAL)*n(INCENTRAL)]')
A, B, C = construct_baseline_triangle(model, *sides, show_guides=show_guides)
construct_x_03748(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-03748.json"))
write_center_svg(
model_acute,
here / "x-03748.svg",
subtitle="(a, b, c) = (5, 6, 7) | AB = 1",
)