156 lines
7.7 KiB
Python
156 lines
7.7 KiB
Python
# Genera docs/calle.svg: calle en perspectiva, gente saliendo de los portales.
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# Calzada y acera con líneas limpias; edificios a mano alzada; gente con trazo difuso.
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import sys, random, math
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random.seed(1310)
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OUT = sys.argv[1]
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W, H = 1200, 640
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VX, VY, F = 600, 205, 500 # punto de fuga y focal
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EYE = 4.0 # cámara a 4 m (desde un balcón)
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ROAD, WALK, TOP = 3.4, 6.6, -16.0 # medio ancho calzada, fachada, altura
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INK, ORA = "#111", "#ff7a1a"
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o = []
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add = o.append
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def P(X, Y, Z): # Y hacia abajo, suelo en Y = EYE
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return VX + X * F / Z, VY + Y * F / Z
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def poly(pts, **a):
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d = "M" + " L".join(f"{x:.1f},{y:.1f}" for x, y in pts) + "Z"
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add(f'<path d="{d}" ' + " ".join(f'{k.replace("_","-")}="{v}"' for k, v in a.items()) + "/>")
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def line(p, q, w, filt=None, col=INK, op=1):
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f = f' filter="url(#{filt})"' if filt else ""
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add(f'<line x1="{p[0]:.1f}" y1="{p[1]:.1f}" x2="{q[0]:.1f}" y2="{q[1]:.1f}" stroke="{col}" stroke-width="{w:.1f}" stroke-linecap="round" opacity="{op}"{f}/>')
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ZN, ZF = 4.4, 400.0
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add(f'<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 {W} {H}" width="{W}" height="{H}">')
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add('''<defs>
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<filter id="lapiz" x="-5%" y="-5%" width="110%" height="110%"><feTurbulence type="fractalNoise" baseFrequency="0.035" numOctaves="2" seed="3"/><feDisplacementMap in="SourceGraphic" scale="4"/></filter>
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<filter id="trazo" x="-30%" y="-30%" width="160%" height="160%"><feTurbulence type="fractalNoise" baseFrequency="0.13" numOctaves="2" seed="5" result="t"/><feDisplacementMap in="SourceGraphic" in2="t" scale="3.5" result="d"/><feGaussianBlur in="d" stdDeviation="0.45"/></filter>
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<filter id="spray" x="-30%" y="-30%" width="160%" height="160%"><feTurbulence type="fractalNoise" baseFrequency="0.09" numOctaves="3" seed="8" result="t"/><feDisplacementMap in="SourceGraphic" in2="t" scale="9" result="d"/><feGaussianBlur in="d" stdDeviation="0.7"/></filter>
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<radialGradient id="luz"><stop offset="0" stop-color="#ff7a1a" stop-opacity=".9"/><stop offset="1" stop-color="#ff7a1a" stop-opacity="0"/></radialGradient>
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<clipPath id="lienzo"><rect width="1200" height="640"/></clipPath>
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</defs>''')
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add(f'<g clip-path="url(#lienzo)"><rect width="{W}" height="{H}" fill="#fff"/>')
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# luz naranja al fondo de la calle
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add(f'<ellipse cx="{VX}" cy="{VY-10}" rx="170" ry="120" fill="url(#luz)"/>')
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add(f'<g filter="url(#spray)">')
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for _ in range(28):
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a = random.uniform(0, 2*math.pi); r = random.uniform(30, 190)
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add(f'<circle cx="{VX+r*math.cos(a)*1.2:.0f}" cy="{VY-10+r*math.sin(a)*.7:.0f}" r="{random.uniform(1.5,6):.1f}" fill="{ORA}"/>')
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add('</g>')
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# --- fachadas (a mano alzada) ---
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def fachada(s):
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X = s * WALK
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# línea de cornisas / pisos
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for Y in (EYE - 3.2, EYE - 6.8, EYE - 10.4, EYE - 14.0):
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line(P(X, Y, ZN), P(X, Y, ZF), 2.2, "lapiz")
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# aristas verticales de los portales y ventanas
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z = ZN + 1.2
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i = 0
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while z < 90:
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dz = 1.5
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# portal
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poly([P(X, EYE, z), P(X, EYE - 2.6, z), P(X, EYE - 2.6, z + dz), P(X, EYE, z + dz)],
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fill=ORA if i % 2 == 0 else "#fff", stroke=INK, stroke_width=f"{max(1.2, 30/z):.1f}", filter="url(#lapiz)")
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if i % 2 == 1:
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poly([P(X, EYE, z+.2), P(X, EYE - 2.4, z+.2), P(X, EYE - 2.4, z + dz-.2), P(X, EYE, z + dz-.2)], fill=INK, opacity=".85", filter="url(#lapiz)")
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# ventanas encima
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for Yb in (EYE - 4.2, EYE - 7.8, EYE - 11.4):
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poly([P(X, Yb, z+.15), P(X, Yb - 1.8, z+.15), P(X, Yb - 1.8, z + dz-.15), P(X, Yb, z + dz-.15)],
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fill="none", stroke=INK, stroke_width=f"{max(.8, 18/z):.1f}", filter="url(#lapiz)")
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z += dz + 2.2 + z * .12
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i += 1
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fachada(-1); fachada(1)
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# --- acera y calzada (líneas limpias) ---
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for s in (-1, 1):
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# acera (gris claro) y bordillo
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poly([P(s*ROAD, EYE-.15, ZN), P(s*WALK, EYE-.15, ZN), P(s*WALK, EYE-.15, ZF), P(s*ROAD, EYE-.15, ZF)], fill="#f2f2f2")
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poly([P(s*ROAD, EYE-.15, ZN), P(s*ROAD, EYE, ZN), P(s*ROAD, EYE, ZF), P(s*ROAD, EYE-.15, ZF)], fill=INK)
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line(P(s*ROAD, EYE-.15, ZN), P(s*ROAD, EYE-.15, ZF), 3)
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line(P(s*WALK, EYE, ZN), P(s*WALK, EYE, ZF), 3)
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# juntas de las baldosas
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z = ZN
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while z < 120:
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line(P(s*ROAD, EYE-.15, z), P(s*WALK, EYE-.15, z), max(.6, 9/z))
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z *= 1.12
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for k in (1, 2):
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Xk = s * (ROAD + (WALK - ROAD) * k / 3)
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line(P(Xk, EYE-.15, ZN), P(Xk, EYE-.15, ZF), .8, op=.6)
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# línea discontinua central
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z = ZN
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while z < 200:
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poly([P(-.08, EYE, z), P(.08, EYE, z), P(.08, EYE, z+2.2), P(-.08, EYE, z+2.2)], fill=INK)
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z += 2.2 + 2.6 + z * .08
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# bordes de la calzada
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for s in (-1, 1):
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line(P(s*(ROAD-.25), EYE, ZN), P(s*(ROAD-.25), EYE, ZF), 2.4)
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# paso de cebra delante
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for i in range(-6, 7):
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x0 = i * .52
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poly([P(x0-.2, EYE, ZN+.2), P(x0+.2, EYE, ZN+.2), P(x0+.2, EYE, ZN+2.6), P(x0-.2, EYE, ZN+2.6)], fill=INK)
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# --- gente (trazo difuso) ---
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def persona(X, Z, col=INK, pose=None):
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x, y = P(X, EYE, Z)
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h = 1.72 * F / Z
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if pose is None:
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pose = random.choice(["anda", "anda", "puño", "brazos", "anda"])
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paso = random.uniform(-1, 1)
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w = max(1.1, .042 * h)
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hd = (x + random.uniform(-.02, .02) * h, y - .9 * h)
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nk, hip = (x, y - .8 * h), (x + paso * .01 * h, y - .48 * h)
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sh_l, sh_r = (x - .11 * h, y - .78 * h), (x + .11 * h, y - .78 * h)
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pie_l, pie_r = (x - .05*h - paso*.08*h, y), (x + .05*h + paso*.08*h, y)
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rod_l, rod_r = (x - .04*h - paso*.04*h, y - .25*h), (x + .04*h + paso*.05*h, y - .25*h)
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if pose == "puño":
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m_l, c_l = (x - .14*h, y - .46*h), (x - .15*h, y - .62*h)
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m_r, c_r = (x + .1*h, y - 1.18*h), (x + .17*h, y - .98*h)
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elif pose == "brazos":
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m_l, c_l = (x - .26*h, y - 1.12*h), (x - .2*h, y - .95*h)
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m_r, c_r = (x + .26*h, y - 1.12*h), (x + .2*h, y - .95*h)
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else:
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m_l, c_l = (x - .15*h - paso*.05*h, y - .44*h), (x - .16*h, y - .6*h)
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m_r, c_r = (x + .15*h + paso*.05*h, y - .44*h), (x + .16*h, y - .6*h)
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def tr(*pts, ww):
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d = "M" + " L".join(f"{a+random.uniform(-.6,.6):.1f},{b+random.uniform(-.6,.6):.1f}" for a, b in pts)
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add(f'<path d="{d}" fill="none" stroke="{col}" stroke-width="{ww:.1f}" stroke-linecap="round" stroke-linejoin="round"/>')
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for pas in range(2): # dos pasadas desplazadas = trazo suelto
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ww = w * (1 if pas == 0 else .6)
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dx, dy = (0, 0) if pas == 0 else (random.uniform(-.03, .03) * h, random.uniform(-.02, .02) * h)
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add(f'<g opacity="{.92 if pas == 0 else .45}" transform="translate({dx:.1f},{dy:.1f})">')
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tr(nk, hip, ww=ww * 1.5)
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tr(hip, rod_l, pie_l, ww=ww)
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tr(hip, rod_r, pie_r, ww=ww)
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tr(sh_l, c_l, m_l, ww=ww * .85)
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tr(sh_r, c_r, m_r, ww=ww * .85)
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tr(sh_l, sh_r, ww=ww * 1.2)
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add(f'<ellipse cx="{hd[0]:.1f}" cy="{hd[1]:.1f}" rx="{.062*h:.1f}" ry="{.072*h:.1f}" fill="{col}"/>')
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add('</g>')
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gente = []
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# saliendo de los portales (en la acera)
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for s in (-1, 1):
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z = ZN + 1.2; i = 0
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while z < 70:
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if i % 2 == 0:
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for k in range(random.randint(1, 3)):
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gente.append((s * random.uniform(WALK - 1.6, WALK - .4), z + random.uniform(.2, 1.4), INK))
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z += 1.5 + 2.2 + z * .12; i += 1
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# bajando a la calzada, hacia el centro
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for _ in range(42):
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Z = math.exp(random.uniform(math.log(6.5), math.log(70)))
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gente.append((random.uniform(-ROAD + .4, ROAD - .4), Z, ORA if random.random() < .22 else INK))
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gente.sort(key=lambda g: -g[1])
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add('<g filter="url(#trazo)">')
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for X, Z, col in gente:
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persona(X, Z, col)
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add('</g>')
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# salpicaduras sueltas
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add('<g filter="url(#spray)">')
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for _ in range(40):
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add(f'<circle cx="{random.uniform(0,W):.0f}" cy="{random.uniform(H*.55,H):.0f}" r="{random.uniform(1,3.5):.1f}" fill="{INK}" opacity=".7"/>')
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add('</g>')
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add('</g></svg>')
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open(OUT, "w").write("\n".join(o))
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