Fișier:Earth dry elevation.stl

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Descriere fișier

DescriereEarth dry elevation.stl English: Earth without liquid water greatly exaggerated elevation model by CMG Lee using depthmap File:Earth_dry_elevation.png generated from NASA Visible Earth topography and bathymetry data.
Dată 15 aprilie 2018
Sursă Operă proprie
Autor Cmglee
Alte versiuni
Earth dry elevation.png
Earth dry elevation 2.stl
Earth dry elevation 10x.stl

Python source

#!/usr/bin/env python exaggeration = 10 header = ('Dry Earth %s-times-exaggerated elevation model by CMG Lee using NASA data.' % (exaggeration)) path_png_alt = 'earth_dry_elevation.png' ## 1-channel equirectangular PNG luma_datum = 141 ## image intensity level (of 0-255) of datum radius_datum = 6378.137 ## mean radius of zero level in km f_wgs84 = 1 / 298.257223563 ## WGS84 flattening factor km_per_luma = (10.994 + 8.848) / 255 * exaggeration ## min and max elevations in km scale = 1e-2 ## overall scale of model in km^-1 lat_offset = 5.0 / 8 ## rotation around planet axis in revolutions n_division = 200 ## each cubic face divided into n_division^2 squares class Png: def __init__(self, path): (self.width, self.height, self.pixels, self.metadatas) = png.Reader(path).read_flat() def __str__(self): return str((self.width, self.height, len(self.pixels), self.metadatas)) import time, re, math, struct, png time.start = time.time() def log(string): print('%6.3fs\t%s' % (time.time() - time.start, string)) def fmt(string): ## string.format(**vars()) using tags {expression!format} by CMG Lee def f(tag): i_sep = tag.rfind('!'); return (re.sub('\.0+$', '', str(eval(tag))) if (i_sep < 0) else ('{:%s}' % tag).format(eval(tag))) return (re.sub(r'(?<!{){+}', lambda m:f(m.group()), string) .replace('{{', '{').replace('}}', '}')) def append(obj, string): return obj.append(fmt(string)) def tabbify(cellss, separator='|'): cellpadss = * (len(max(cellss, key=len)) - len(rows)) for rows in cellss] fmts = )) for cols in zip(*cellpadss)] return '\n'.join() def hex_rgb(colour): ## convert RGB to #RRGGBB and RRGGBB to #RRGGBB return '#%s' % (colour if len(colour) > 4 else ''.join()).lstrip('#') def viscam_colour(colour): colour_hex = hex_rgb(colour) colour_top5bits = , 16) >> 3 for i in range(1,7,2)] return (1 << 15) + (colour_top5bits << 10) + (colour_top5bits << 5) + colour_top5bits def roundm(x, multiple=1): if (isinstance(x, tuple)): return tuple(roundm(list(x), multiple)) elif (isinstance(x, list )): return else: return int(math.floor(float(x) / multiple + 0.5)) * multiple def average(xs): return None if (len(xs) == 0) else float(sum(xs)) / len(xs) def flatten(lss): return def rotate(facetss, degs): ## around x then y then z axes (deg_x,deg_y,deg_z) = degs (sin_x,cos_x) = (math.sin(math.radians(deg_x)), math.cos(math.radians(deg_x))) (sin_y,cos_y) = (math.sin(math.radians(deg_y)), math.cos(math.radians(deg_y))) (sin_z,cos_z) = (math.sin(math.radians(deg_z)), math.cos(math.radians(deg_z))) facet_rotatess = for facets in facetss: facet_rotates = for i_point in range(4): (x,y,z) = for i_xyz in range(3)] if (x is None or y is None or z is None): facet_rotates += else: (y,z) = (y * cos_x - z * sin_x, y * sin_x + z * cos_x) ## rotate about x (x,z) = (x * cos_y + z * sin_y,-x * sin_y + z * cos_y) ## rotate about y (x,y) = (x * cos_z - y * sin_z, x * sin_z + y * cos_z) ## rotate about z facet_rotates += ] facet_rotatess.append(facet_rotates) return facet_rotatess def translate(facetss, ds): ## ds = (dx,dy,dz) return + + ds for i_point in range(1,4) for i_xyz in range(3)] for facets in facetss] def flip(facetss): return +facets+facets+facets for facets in facetss] def cube_xyz_to_sphere_xyz(cube_xyzs): (x,y,z) = (x_squared,y_squared,z_squared) = (x * x,y * y,z * z) return (x * (1 - (y_squared + z_squared) / 2 + y_squared * z_squared / 3) ** 0.5, y * (1 - (x_squared + z_squared) / 2 + x_squared * z_squared / 3) ** 0.5, z * (1 - (y_squared + x_squared) / 2 + y_squared * x_squared / 3) ** 0.5) def xyz_to_lla(xyzs): (x,y,z) = xyzs alt = (x * x + y * y + z * z) ** 0.5 lon = math.atan2(y, x) lat = math.asin(z / alt) return (lat,lon,alt) deg_90 = math.pi / 2 def find_alt(lat_lons, altss): (lat,lon) = lat_lons if (lat == deg_90): alt = average(altss) elif (lat == -deg_90): alt = average(altss) else: (width,height) = (len(altss),len(altss)) x = (0.5 + lon / (deg_90 * 4) + lat_offset) * width y = (0.5 - lat / (deg_90 * 2) ) * height (x_int,y_int) = (int(x) , int(y) ) (x_dec,y_dec) = (x - x_int, y - y_int) (x0,x1) = (x_int % width , (x_int + 1) % width ) (y0,y1) = (y_int % height, (y_int + 1) % height) alt = ((altss * (1 - x_dec) + altss * x_dec) * (1 - y_dec) + (altss * (1 - x_dec) + altss * x_dec) * y_dec) # print(map(math.degrees, lat_lons), y,x, alt) return alt def radius_wgs84(lat): if (lat in radius_wgs84.cachess): return radius_wgs84.cachess (sin_lat, cos_lat) = (math.sin(lat), math.cos(lat)) ff = (1 - f_wgs84) ** 2 c = 1 / (cos_lat ** 2 + ff * sin_lat ** 2) ** 0.5 s = c * ff radius_c_s_s = (radius_datum * c, radius_datum * s) radius_wgs84.cachess = radius_c_s_s return radius_c_s_s radius_wgs84.cachess = {} def lla_to_sphere_xyz(llas): (lat,lon,alt) = llas (sin_lat,sin_lon) = (math.sin(lat),math.sin(lon)) (cos_lat,cos_lon) = (math.cos(lat),math.cos(lon)) (radius_c, radius_s) = return (radius_c * cos_lat * cos_lon,radius_c * cos_lat * sin_lon,radius_s * sin_lat) def xyz_alt_to_xyza(xyzs, altss): (lat,lon,alt) = xyz_to_lla(xyzs) alt = find_alt((lat,lon), altss) lla_alts = return lla_alts log("Read elevation data") png_alt = Png(path_png_alt) if (png_alt.metadatas != 1): print("%s not 1-channel PNG" % (path_png_alt)); sys.exit(1) log(png_alt) altss = - luma_datum for x in range(png_alt.width)] for y in range(png_alt.height)] ## altss log("Find vertices") k = 2.0 / n_division range_k = range(n_division + 1) face_vertex_llassss = for x in range_k], for x in range_k], for x in range_k], for x in range_k], for x in range_k], for x in range_k], ] log("Add facets") ## cube xyz -> ll(a) -> image xy -> a -> sphere xyz facetss = for (i_face,face_vertex_llasss) in enumerate(face_vertex_llassss): for v in range(n_division): for u in range(n_division): (xyz00, alt00) = face_vertex_llasss (xyz01, alt01) = face_vertex_llasss (xyz10, alt10) = face_vertex_llasss (xyz11, alt11) = face_vertex_llasss (xyz_m, alt_m) = xyz_alt_to_xyza(, altss) if (alt_m > max(alt00,alt01,alt10,alt11) or alt_m < min(alt00,alt01,alt10,alt11)): facetss.append( + xyz_m + xyz00 + xyz10) facetss.append( + xyz_m + xyz10 + xyz11) facetss.append( + xyz_m + xyz11 + xyz01) facetss.append( + xyz_m + xyz01 + xyz00) else: if (abs(alt00 - alt11) < abs(alt01 - alt10)): facetss.append( + xyz00 + xyz10 + xyz11) facetss.append( + xyz11 + xyz01 + xyz00) else: facetss.append( + xyz10 + xyz11 + xyz01) facetss.append( + xyz01 + xyz00 + xyz10) log("Calculate normals") for facets in facetss: if (facets is None or facets is None or facets is None): us = - facets for i_xyz in range(3)] vs = - facets for i_xyz in range(3)] normals = *vs - us*vs, us*vs - us*vs, us*vs - us*vs] normal_length = sum() ** 0.5 facets = # log(tabbify( + # + ] + facetss)) log("Compile STL") outss = ()).encode('utf-8'), struct.pack('<L',len(facetss))]] + ] + ))] for facets in facetss]) out = b''.join() # out += ('\n\n## Python script to generate STL\n\n%s\n' % (open(__file__).read())).encode('utf-8') log("Write STL") with open(__file__ + '.stl', 'wb') as f_out: f_out.write(out) log("#bytes:%d\t#facets:%d\ttitle:\"%-73s\"" % (len(out), len(facetss), header))

Licențiere

Eu, deținătorul drepturilor de autor ale acestei opere, prin prezenta îmi public lucrarea sub următoarea licență: w:ro:Creative Commons
atribuind partajând în condiții identiceAcest fișier a fost eliberat sub licența Creative Commons Atribuire și distribuire în condiții identice 4.0 Internațională. Sunteți liber: În următoarele condiții: https://creativecommons.org/licenses/by-sa/4.0CC BY-SA 4.0 Creative Commons Attribution-Share Alike 4.0 truetrue
Wikimedia Foundation The uploader of this file has agreed to the Wikimedia Foundation 3D patent license: This file and any 3D objects depicted in the file are both my own work. I hereby grant to each user, maker, or distributor of the object depicted in the file a worldwide, royalty-free, fully-paid-up, nonexclusive, irrevocable and perpetual license at no additional cost under any patent or patent application I own now or in the future, to make, have made, use, offer to sell, sell, import, and distribute this file and any 3D objects depicted in the file that would otherwise infringe any claims of any patents I hold now or in the future.
Please note that in the event of any differences in meaning or interpretation between the original English version of this license and a translation, the original English version takes precedence.

Captions

românăAdd a one-line explanation of what this file representsenglezăEarth with a exaggerated elevation model

Items portrayed in this file

subiectul reprezentatterrestrial globe englezăcreatorsome valuenumele autorului (text): Cmgleenume de utilizator la Wikimedia: CmgleeURL: http://commons.wikimedia.org/wiki/User:Cmgleestatutul drepturilor de autormaterial protejat de drepturi de autorlicențăAtribuire - Distribuire în condiții identice 4.0 Internaționalînființare15 aprilie 2018source of file englezăoriginal creation by uploader engleză

Istoricul fișierului

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Data și oraMiniaturăDimensiuniUtilizatorComentariu
actuală15 aprilie 2018 16:21Miniatură pentru versiunea din 15 aprilie 2018 16:215.120x2.880 (27,66 MB)CmgleeRotate to show the Himalayas and Mariana Trench in the thumbnail.
15 aprilie 2018 15:43Miniatură pentru versiunea din 15 aprilie 2018 15:435.120x2.880 (27,63 MB)CmgleeUser created page with UploadWizard

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