#!/usr/bin/env python3 """Draw map.svg for the Downstream room from data.json. The two attractors are laid out exactly (the sixteen-member circle as a ring, the two-member flicker as a pair of opposed arcs); the tributary streams are drawn schematically, with hand-placed curves, since the full chains are printed on the page itself. Colours follow style.css, with a dark scheme via prefers-color-scheme inside the SVG so it works from an tag. """ import json import math import pathlib HERE = pathlib.Path(__file__).parent data = json.loads((HERE / "data.json").read_text()) W, H = 840, 600 CX, CY, R = 570, 250, 145 ring = data["attractors"]["circle"]["members"] # Nodes where a tributary arrives (marked in the accent colour). ENTRY = {"Knowledge", "Science", "Thought"} # Nodes whose labels sit inside the ring (an entry stream, or another # label, occupies the space outside them). INSIDE = ENTRY | {"Matter"} def ringpos(i, r=R): th = math.radians(210 + i * 22.5) # y-down coords; sequence runs clockwise return CX + r * math.cos(th), CY + r * math.sin(th), th def fmt(x): return f"{x:.1f}" parts = [] parts.append( f'' ) parts.append(""" """) # --- the circle ------------------------------------------------------------- parts.append(f'The Circle') parts.append(f'sixteen articles, each the next one’s first link') n = len(ring) for i in range(n): x1, y1, _ = ringpos(i) # arc from just past this node to just before the next a1 = math.radians(210 + i * 22.5 + 4.5) a2 = math.radians(210 + (i + 1) * 22.5 - 6.5) sx, sy = CX + R * math.cos(a1), CY + R * math.sin(a1) ex, ey = CX + R * math.cos(a2), CY + R * math.sin(a2) parts.append( f'' ) for i, name in enumerate(ring): x, y, th = ringpos(i) c, s = math.cos(th), math.sin(th) entry = name in ENTRY parts.append(f'') if name in INSIDE: lx, ly = x - 13 * c, y - 13 * s anchor = "start" if c < 0 else "end" dy = 4 else: lx, ly = x + 13 * c, y + 13 * s anchor = "middle" if abs(c) < 0.25 else ("start" if c > 0 else "end") dy = -4 if s < -0.5 else (11 if s > 0.5 else 4) label = name.replace("Outline of physical science", "Outline of physical science") parts.append( f'{label}' ) # --- the flicker ------------------------------------------------------------ EX, EY = 165, 505 RX, RY = 345, 505 parts.append(f'The Flicker') parts.append(f'') parts.append(f'') parts.append(f'Existence') parts.append(f'Reality') parts.append(f'') parts.append(f'') # --- the streams (schematic) ------------------------------------------------ def stream(path_d, lines, lx, ly, anchor="start"): parts.append(f'') for k, line in enumerate(lines): parts.append( f'{line}' ) # into Knowledge (upper left of ring) kx, ky, kth = ringpos(0) stream( f"M150,78 C 250,84 380,118 {fmt(kx - 10)},{fmt(ky - 8)}", ["reed · sedge · common descent", "down Biology, 4–7 clicks"], 150, 46, ) # into Science (left of ring) sx, sy, sth = ringpos(15) stream( f"M60,208 C 160,203 300,218 {fmt(sx - 14)},{fmt(sy - 2)}", ["a town in Queensland · a merchant of Aalborg", "down Geography, Earth and Physics, 12–13 clicks"], 60, 176, ) # into Thought (upper right of ring) tx, ty, tth = ringpos(5) stream( f"M762,50 C 742,72 712,112 {fmt(tx + 8)},{fmt(ty - 10)}", ["the Ship of Theseus", "down Logic, 4 clicks"], 768, 28, anchor="end", ) # into Existence, through Philosophy stream( f"M48,340 C 60,390 100,450 {fmt(EX - 8)},{fmt(EY - 12)}", ["the Cosmographia of 1544,", "through Philosophy itself, 5 clicks"], 40, 312, ) parts.append('') parts.append('Philosophy') # into Existence, down Entity stream( f"M395,368 C 350,410 260,460 {fmt(EX + 12)},{fmt(EY - 10)}", ["a geodesist · a village · a campaign · an album", "down Entity, 8–20 clicks"], 415, 434, ) parts.append("") (HERE / "map.svg").write_text("\n".join(parts)) print("wrote", HERE / "map.svg")