def fit_bounds(cls, bounds):
"""Fit bounds to tiles matching tileswide and tileshigh.
Returns corner tiles as a tuple."""
for zoom in range(tilesetcls.maxzoom, tilesetcls.minzoom-1, -1):
tl, br = tilesetcls.bounds2cornertiles(bounds, zoom)
tw,th = tilesetcls.cornertiles2tiledims(tl, br)
if tw > cls.tileswide or th > cls.tileshigh:
continue
else:
break
#tl, br = cls.fit_width(tl, br)
#tl, br = cls.fit_height(tl, br)
return (tl, br)
def fit_height(cls, tl, br):
"""Adjust corner tiles to fit target height."""
tw, th = tilesetcls.cornertiles2tiledims(tl, br)
zoom = tl.zoom
for g in range(th, cls.tileshigh):
if g % 2 :
if tl.ytile > 0:
tl.ytile = tl.ytile - 1
elif(br.ytile < 2**zoom-1):
br.ytile = br.ytile + 1
else:
break
else:
if(br.ytile < 2**zoom-1):
br.ytile = br.ytile + 1
elif tl.ytile > 0:
tl.ytile = tl.ytile - 1
else:
break
return (tl, br)
def fit_width(cls, tl, br):
"""Takes corner tiles and adjusts to fit target width of base map image."""
tw, th = tilesetcls.cornertiles2tiledims(tl, br)
zoom = tl.zoom
for g in range(tw, cls.tileswide):
if g % 2 :
if tl.xtile > 0:
tl.xtile = tl.xtile - 1
elif(br.xtile < 2**zoom-1):
br.xtile = br.xtile + 1
else:
break
else:
if(br.xtile < 2**zoom-1):
br.xtile = br.xtile + 1
elif tl.xtile > 0:
tl.xtile = tl.xtile - 1
else:
break
return (tl, br)
