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#!/usr/bin/python
#
# Fabien Chereau fchereau@eso.org
#
import gzip
import os
def writePolys(pl, f):
"""Write a list of polygons pl into the file f.
The result is under the form [[[ra1, de1],[ra2, de2],[ra3, de3],[ra4, de4]], [[ra1, de1],[ra2, de2],[ra3, de3]]]"""
f.write('[')
for idx, poly in enumerate(pl):
f.write('[')
for iv, v in enumerate(poly):
f.write('[%.8f, %.8f]' % (v[0], v[1]))
if iv != len(poly) - 1:
f.write(', ')
f.write(']')
if idx != len(pl) - 1:
f.write(', ')
f.write(']')
class StructCredits:
def __init__(self):
self.short = None
self.full = None
self.infoUrl = None
return
def outJSON(self, f, levTab):
if self.short != None:
f.write(levTab + '\t\t"short": "' + self.short + '",\n')
if self.full != None:
f.write(levTab + '\t\t"full": "' + self.full + '",\n')
if self.infoUrl != None:
f.write(levTab + '\t\t"infoUrl": "' + self.infoUrl + '",\n')
f.seek(-2, os.SEEK_CUR)
f.write('\n')
class SkyImageTile:
"""Contains all the properties needed to describe a multiresolution image tile"""
def __init__(self):
self.subTiles = []
self.imageCredits = StructCredits()
self.serverCredits = StructCredits()
self.imageInfo = StructCredits()
self.imageUrl = None
self.alphaBlend = None
self.maxBrightness = None
return
def outputJSON(self, prefix='', qCompress=False, maxLevelPerFile=10, outDir=''):
"""Output the tiles tree in the JSON format"""
fName = outDir + prefix + "x%.2d_%.2d_%.2d.json" % (2 ** self.level, self.i, self.j)
# Actually write the file with maxLevelPerFile level
with open(fName, 'w') as f:
self.__subOutJSON(prefix, qCompress, maxLevelPerFile, f, 0, outDir)
if (qCompress):
with open(fName) as ff:
fout = gzip.GzipFile(fName + ".gz", 'w')
fout.write(ff.read())
fout.close()
os.remove(fName)
def __subOutJSON(self, prefix, qCompress, maxLevelPerFile, f, curLev, outDir):
"""Write the tile in the file f"""
levTab = ""
for i in range(0, curLev):
levTab += '\t'
f.write(levTab + '{\n')
if self.imageInfo.short != None or self.imageInfo.full != None or self.imageInfo.infoUrl != None:
f.write(levTab + '\t"imageInfo": {\n')
self.imageInfo.outJSON(f, levTab)
f.write(levTab + '\t},\n')
if self.imageCredits.short != None or self.imageCredits.full != None or self.imageCredits.infoUrl != None:
f.write(levTab + '\t"imageCredits": {\n')
self.imageCredits.outJSON(f, levTab)
f.write(levTab + '\t},\n')
if self.serverCredits.short != None or self.serverCredits.full != None or self.serverCredits.infoUrl != None:
f.write(levTab + '\t"serverCredits": {\n')
self.serverCredits.outJSON(f, levTab)
f.write(levTab + '\t},\n')
if self.imageUrl:
f.write(levTab + '\t"imageUrl": "' + self.imageUrl + '",\n')
f.write(levTab + '\t"worldCoords": ')
writePolys(self.skyConvexPolygons, f)
f.write(',\n')
f.write(levTab + '\t"textureCoords": ')
writePolys(self.textureCoords, f)
f.write(',\n')
if self.maxBrightness:
f.write(levTab + '\t"maxBrightness": %f,\n' % self.maxBrightness)
if self.alphaBlend:
f.write(levTab + '\t"alphaBlend": true,\n')
f.write(levTab + '\t"minResolution": %f' % self.minResolution)
if not self.subTiles:
f.write('\n' + levTab + '}')
return
f.write(',\n')
f.write(levTab + '\t"subTiles": [\n')
if curLev + 1 < maxLevelPerFile:
# Write the tiles in the same file
for st in self.subTiles:
assert isinstance(st, SkyImageTile)
st.__subOutJSON(prefix, qCompress, maxLevelPerFile, f, curLev + 1, outDir)
f.write(',\n')
else:
# Write the tiles in a new file
for st in self.subTiles:
st.outputJSON(prefix, qCompress, maxLevelPerFile, outDir)
f.write(levTab + '\t\t{"$ref": "' + prefix + "x%.2d_%.2d_%.2d.json" % (2 ** st.level, st.i, st.j))
if qCompress:
f.write(".gz")
f.write('"},\n')
f.seek(-2, os.SEEK_CUR)
f.write('\n' + levTab + '\t]\n')
f.write(levTab + '}')
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