TianXuan Developer
66e3649152
- Generate high-quality SVG world map (static, no tiles) - Points: radius 7, white border, high-contrast subnet colors - Node click: show detail panel + highlight edges on map - Highlighted edges: clickable, show edge detail panel - Edge detail: Beijing time, avg bytes, src/dst IP clickable - Map init: requestAnimationFrame ensures container has dimensions - Cleanup: remove polygon-based continent drawing code Co-Authored-By: Claude <noreply@anthropic.com>
220 lines
8.8 KiB
Python
220 lines
8.8 KiB
Python
#!/usr/bin/env python3
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"""Generate a clean world map PNG using only stdlib (struct + zlib).
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Output: static/simple_analysis/world_map.png (2048×1024, ~50KB)
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"""
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import struct, zlib, math
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from pathlib import Path
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W, H = 2048, 1024
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def lon_to_x(lon): return int((lon + 180) / 360 * W)
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def lat_to_y(lat): return int((90 - lat) / 180 * H)
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# ── Continent outlines (simplified Natural Earth-style paths) ──
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# Each entry: (fill_rgb, outline_rgb, [(lat, lon), ...])
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CONTINENTS = [
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# North America
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((220, 228, 235), (160, 172, 186), [
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(72, -168),(71, -156),(70, -144),(68, -136),(66, -130),(64, -124),(62, -118),
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(60, -114),(58, -110),(56, -106),(54, -100),(52, -96),(50, -92),(48, -88),
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(46, -84),(44, -80),(42, -78),(40, -76),(38, -76),(35, -78),(32, -80),
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(30, -82),(28, -84),(26, -82),(24, -80),(22, -78),(20, -76),(18, -78),
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(16, -82),(14, -86),(12, -88),(9, -82),(8, -80),(8, -78),(9, -76),
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(12, -72),(15, -66),(18, -62),(21, -60),(25, -60),(28, -58),(32, -58),
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(35, -57),(35, -50),(34, -42),(35, -35),(40, -30),(45, -28),(50, -26),
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(55, -22),(60, -18),(65, -14),(70, -16),(75, -22),(78, -32),(80, -48),
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(82, -60),(83, -72),(84, -84),(82, -98),(80, -115),(78, -135),(76, -155),(72, -168),
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]),
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# Greenland
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((220, 228, 235), (160, 172, 186), [
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(83, -55),(82, -30),(80, -20),(78, -16),(76, -18),(75, -24),
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(76, -34),(78, -46),(80, -58),(82, -62),(83, -55),
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]),
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# South America
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((215, 225, 233), (160, 172, 186), [
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(12, -72),(10, -68),(8, -62),(5, -55),(3, -50),(0, -46),(-2, -42),
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(-4, -38),(-7, -34),(-10, -32),(-13, -30),(-16, -28),(-18, -26),
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(-22, -24),(-25, -26),(-28, -30),(-32, -34),(-34, -38),(-37, -40),
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(-40, -44),(-44, -48),(-50, -50),(-54, -52),(-55, -48),(-54, -44),
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(-52, -40),(-48, -36),(-44, -34),(-40, -32),(-36, -30),(-32, -28),
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(-28, -26),(-24, -24),(-20, -22),(-16, -24),(-12, -28),(-8, -34),
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(-4, -40),(0, -46),(4, -52),(8, -60),(12, -72),
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]),
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# Europe
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((218, 226, 234), (160, 172, 186), [
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(71, -6),(70, 5),(69, 10),(66, 14),(62, 15),(58, 15),(54, 14),(50, 12),
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(46, 8),(44, 2),(43, -3),(44, -6),(46, -9),(48, -10),(50, -8),(53, -6),
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(55, -4),(57, -2),(59, -5),(61, -8),(64, -12),(67, -10),(70, -6),
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]),
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# UK
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((218, 226, 234), (160, 172, 186), [
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(58.5, -6.5),(57.5, -3),(55.5, -1.5),(54, -3),(52.5, -5),(51.5, -8),
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(53, -10),(55, -8),(57, -6),(58.5,-6.5),
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]),
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# Scandinavia
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((218, 226, 234), (160, 172, 186), [
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(71, 7),(70, 14),(68, 16),(65, 15),(62, 13),(60, 9),(58, 6),
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(56, 8),(55, 12),(56, 17),(58, 23),(60, 30),(62, 32),(65, 30),
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(68, 26),(70, 20),(71, 12),(71, 7),
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]),
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# Africa
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((225, 232, 238), (165, 174, 186), [
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(37, -9),(35, -2),(33, 5),(30, 12),(28, 18),(25, 24),(22, 30),
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(18, 36),(15, 39),(10, 42),(5, 43),(-2, 42),(-6, 38),(-10, 34),
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(-14, 30),(-17, 26),(-20, 22),(-24, 18),(-27, 14),(-30, 10),
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(-33, 6),(-35, 2),(-33, -3),(-28, -6),(-22, -8),(-18, -6),
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(-12, -3),(-6, 0),(0, -2),(6, -4),(12, -6),(18, -8),(24, -10),
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(30, -10),(34, -9),(37, -9),
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]),
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# Asia
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((222, 229, 236), (160, 172, 186), [
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(72, 42),(70, 55),(68, 72),(66, 90),(64, 105),(62, 122),(60, 138),
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(56, 152),(52, 158),(48, 162),(44, 166),(40, 170),(37, 172),(34, 170),
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(30, 168),(28, 164),(26, 158),(24, 152),(22, 148),(18, 144),(15, 140),
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(12, 135),(10, 130),(8, 125),(5, 120),(2, 115),(-2, 110),(-5, 105),
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(-8, 100),(-10, 104),(-13, 108),(-16, 114),(-20, 118),(-24, 112),
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(-28, 108),(-32, 104),(-35, 100),(-38, 95),(-40, 90),(-42, 84),
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(-45, 78),(-48, 74),(-50, 70),(-56, 66),(-60, 62),(-62, 58),
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(-60, 54),(-58, 50),(-54, 46),(-50, 42),(-46, 38),(-44, 36),
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(-42, 40),(-40, 46),(-36, 50),(-32, 54),(-28, 55),(-24, 52),
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(-20, 48),(-18, 46),(-14, 48),(-10, 52),(-6, 54),(-2, 50),
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(0, 46),(3, 42),(6, 38),(9, 35),(12, 38),(15, 44),(18, 50),
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(22, 56),(26, 62),(30, 68),(34, 72),(38, 75),(42, 78),
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(46, 80),(52, 78),(58, 74),(62, 70),(66, 66),(70, 58),(72, 50),(72, 42),
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]),
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# Japan
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((222, 229, 236), (160, 172, 186), [
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(45.5, 142),(43, 141),(40, 140),(37, 139),(34, 137),(32, 136),(30, 138),
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(32, 142),(35, 144),(38, 143),(41, 143),(44, 144),(45.5, 142),
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]),
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# SE Asia islands
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((222, 229, 236), (160, 172, 186), [
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(7, 116),(-2, 112),(-6, 106),(-8, 108),(-6, 113),(-2, 116),(2, 119),(5, 118),(7, 116),
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]),
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((222, 229, 236), (160, 172, 186), [
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(1, 126),(-4, 130),(-7, 132),(-7, 136),(-4, 140),(0, 141),(3, 139),(4, 135),(1, 126),
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]),
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# Australia
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((222, 229, 236), (160, 172, 186), [
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(-12, 130),(-16, 128),(-20, 126),(-26, 128),(-32, 132),(-36, 138),
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(-39, 143),(-40, 148),(-38, 152),(-34, 154),(-29, 151),(-24, 146),
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(-20, 142),(-17, 138),(-14, 134),(-12, 130),
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]),
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# New Zealand
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((222, 229, 236), (160, 172, 186), [
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(-35, 172.5),(-38, 170),(-41, 172),(-45, 173),(-47, 172),
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(-45, 169),(-42, 170),(-38, 172),(-35, 172.5),
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]),
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# Antarctica
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((238, 240, 243), (190, 195, 200), [
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(-66, -175),(-66, -130),(-68, -80),(-70, -40),(-72, 0),
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(-72, 40),(-70, 80),(-68, 130),(-66, 175),
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(-75, 175),(-78, 130),(-80, 80),(-82, 40),(-82, 0),
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(-80, -40),(-78, -80),(-75, -130),(-72, -175),(-66, -175),
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]),
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]
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def draw_filled_polygon(pixels, fill, outline, pts):
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"""Draw a filled polygon using scanline algorithm."""
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h = len(pixels); w = len(pixels[0]) if h > 0 else 0
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if w == 0: return
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# Convert lat/lon to pixel coordinates
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px = [lon_to_x(lon) for (lat, lon) in pts]
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py = [lat_to_y(lat) for (lat, lon) in pts]
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n = len(px)
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if n < 3: return
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# Bounding box
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min_y = max(0, min(py)); max_y = min(h - 1, max(py))
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# Scanline fill
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for y in range(min_y, max_y + 1):
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intersections = []
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for i in range(n):
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y1, y2 = py[i], py[(i + 1) % n]
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x1, x2 = px[i], px[(i + 1) % n]
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if y1 == y2: continue
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if (y1 <= y < y2) or (y2 <= y < y1):
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t = (y - y1) / (y2 - y1)
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x = int(x1 + t * (x2 - x1))
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intersections.append(x)
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intersections.sort()
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for i in range(0, len(intersections) - 1, 2):
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x_start = max(0, intersections[i])
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x_end = min(w - 1, intersections[i + 1] if i + 1 < len(intersections) else w - 1)
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for x in range(x_start, x_end + 1):
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pixels[y][x] = fill
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# Draw outline
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for i in range(n):
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x1, y1 = px[i], py[i]
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x2, y2 = px[(i + 1) % n], py[(i + 1) % n]
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# Bresenham line
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dx = abs(x2 - x1); dy = -abs(y2 - y1)
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sx = 1 if x1 < x2 else -1
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sy = 1 if y1 < y2 else -1
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err = dx + dy
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cx, cy = x1, y1
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while True:
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if 0 <= cx < w and 0 <= cy < h:
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pixels[cy][cx] = outline
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if cx == x2 and cy == y2: break
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e2 = 2 * err
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if e2 >= dy:
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if cx == x2: break
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err += dy; cx += sx
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if e2 <= dx:
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if cy == y2: break
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err += dx; cy += sy
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def draw_grid(pixels, color):
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h, w = len(pixels), len(pixels[0])
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for lat in range(-60, 61, 30):
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y = lat_to_y(lat)
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if 0 <= y < h:
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for x in range(0, w, 2):
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pixels[y][x] = color
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for lon in range(-150, 151, 30):
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x = lon_to_x(lon)
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if 0 <= x < w:
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for y in range(0, h, 2):
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pixels[y][x] = color
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def png_encode(pixels):
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"""Encode RGB pixels as PNG bytes."""
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h, w = len(pixels), len(pixels[0])
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raw = b''
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for y in range(h):
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raw += b'\x00' # filter none
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for x in range(w):
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r, g, b = pixels[y][x]
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raw += bytes([r, g, b])
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def chunk(ctype, data):
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c = ctype + data
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return struct.pack('>I', len(data)) + c + struct.pack('>I', zlib.crc32(c) & 0xFFFFFFFF)
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ihdr = struct.pack('>IIBBBBB', w, h, 8, 2, 0, 0, 0) # 8-bit RGB
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return (b'\x89PNG\r\n\x1a\n' +
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chunk(b'IHDR', ihdr) +
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chunk(b'IDAT', zlib.compress(raw)) +
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chunk(b'IEND', b''))
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# ── Build picture ──
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OCEAN = (185, 200, 218)
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GRID_COLOR = (170, 185, 205)
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pixels = [[OCEAN for _ in range(W)] for _ in range(H)]
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# Draw grid first (under continents)
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draw_grid(pixels, GRID_COLOR)
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# Draw continents
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for fill, outline, pts in CONTINENTS:
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draw_filled_polygon(pixels, fill, outline, pts)
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# Save
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png_data = png_encode(pixels)
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out_path = Path(__file__).parent / 'static' / 'simple_analysis' / 'world_map.png'
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out_path.parent.mkdir(parents=True, exist_ok=True)
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out_path.write_bytes(png_data)
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print(f'World map saved: {out_path} ({len(png_data):,} bytes, {W}x{H})')
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