X545¶
DIRECTION OF VECTOR AX + BX + CX, where X = X190
X545 (DIRECTION OF VECTOR AX + BX + CX, where X = X190) constructed on acute reference triangle \((a, b, c) = (5, 6, 7)\) with unit baseline AB = \(1\).¶
"""GEOMETOR construction model for X_545 = DIRECTION OF VECTOR AX + BX + CX, where X = X_190."""
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,
centroid_of,
construct_baseline_triangle,
create_model,
eval_barycentric_point,
eval_trilinear_point,
point_from_barycentrics,
promote_point_to_top,
)
from geometor.etc.render import write_center_svg
def construct_x_00545(
model: Model, A: spg.Point, B: spg.Point, C: spg.Point
) -> spg.Point:
"""Construct X_545 = DIRECTION OF VECTOR AX + BX + CX, where X = X_190 on reference triangle ABC."""
X_545 = eval_barycentric_point(model, A, B, C, '2*a**(2) - b**(2) - c**(2) - 2*a*b - 2*a*c + 4*b*c', ID="X_545", classes=["selected", "target"])
X_2 = centroid_of(model, A, B, C, ID="X_2", classes=["center", "incident"])
X_45 = eval_trilinear_point(model, A, B, C, '2*b + 2*c - a', ID="X_45", classes=["center", "incident"])
central_line(model, X_2, X_45, 2, 45, incident=True)
X_30 = eval_trilinear_point(model, A, B, C, 'cos(A) - 2*cos(B)*cos(C)', ID="X_30", classes=["center", "incident"])
X_511 = eval_trilinear_point(model, A, B, C, 'cos(A + omega )', ID="X_511", classes=["center", "incident"])
central_line(model, X_30, X_511, 30, 511, incident=True)
X_44 = eval_trilinear_point(model, A, B, C, 'b + c - 2*a', ID="X_44", classes=["center", "incident"])
X_1266 = point_from_barycentrics(model, A, B, C, -3, 1, 3, ID="X_1266", classes=["center", "incident"])
central_line(model, X_44, X_1266, 44, 1266, incident=True)
return promote_point_to_top(model, X_545)
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_545 on the given reference triangle."""
model = create_model('X_545 = DIRECTION OF VECTOR AX + BX + CX, where X = X_190')
A, B, C = construct_baseline_triangle(model, *sides, show_guides=show_guides)
construct_x_00545(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-00545.json"))
write_center_svg(
model_acute,
here / "x-00545.svg",
subtitle="(a, b, c) = (5, 6, 7) | AB = 1",
)