LogalDeveloper/Minecraft-Overviewer
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quadtree generation works. Changed scaling algorithm

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This commit is contained in:
Andrew Brown
2010-09-04 19:22:04 -04:00
parent 8afeb05cc8
commit 1e08406dff
2 changed files with 19 additions and 10 deletions
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2
chunk.py
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@@ -79,7 +79,7 @@ class ChunkRenderer(object):
# If the render algorithm changes, change this line to re-generate all
# the chunks automatically:
#h.update("1")
h.update("1")
digest = h.hexdigest()
# 6 digits ought to be plenty

27
world.py
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@@ -298,6 +298,10 @@ def generate_quadtree(chunkmap, colstart, colend, rowstart, rowend, prefix, quad
"tile/0/0.png"
Each tile outputted is always 384 by 384 pixels.
The return from this function is the path to the file saved, unless it's
the base call. In that case, it outputs the power of 2 that was used to
size the full image, which is the zoom level.
"""
#print "Called with {0},{1} {2},{3}".format(colstart, colend, rowstart, rowend)
#print " prefix:", prefix
@@ -322,13 +326,14 @@ def generate_quadtree(chunkmap, colstart, colend, rowstart, rowend, prefix, quad
# The first call has a special job. No matter the input, we need to
# make sure that each recursive call splits both dimensions evenly
# into a power of 2 * 384. (Since all tiles are 384x384 which is 3
# cols by 5 rows)
# cols by 5 rows). I'm not really sure how to explain this best,
# sorry.
# Since the row of the final recursion needs to be 3, this split
# needs to be sized into the void so that it is some number of rows
# in the form 3*2^p. And columns must be in the form 5*2^p
# in the form 2*2^p. And columns must be in the form 4*2^p
# They need to be the same power
# In other words, I need to find the smallest power p such that
# colmid + 3*2^p >= colend and rowmid + 5*2^p >= rowend
# colmid + 2*2^p >= colend and rowmid + 4*2^p >= rowend
for p in xrange(15): # That should be a high enough upper limit
if colmid + 2*2**p >= colend and rowmid + 4*2**p >= rowend:
break
@@ -374,10 +379,10 @@ def generate_quadtree(chunkmap, colstart, colend, rowstart, rowend, prefix, quad
colmid, colend, rowmid, rowend,
newprefix, "3")
quad0 = Image.open(quad0file).resize((192,192))
quad1 = Image.open(quad1file).resize((192,192))
quad2 = Image.open(quad2file).resize((192,192))
quad3 = Image.open(quad3file).resize((192,192))
quad0 = Image.open(quad0file).resize((192,192), Image.ANTIALIAS)
quad1 = Image.open(quad1file).resize((192,192), Image.ANTIALIAS)
quad2 = Image.open(quad2file).resize((192,192), Image.ANTIALIAS)
quad3 = Image.open(quad3file).resize((192,192), Image.ANTIALIAS)
img.paste(quad0, (0,0))
img.paste(quad1, (192,0))
@@ -388,5 +393,9 @@ def generate_quadtree(chunkmap, colstart, colend, rowstart, rowend, prefix, quad
path = os.path.join(prefix, quadrent+".png")
img.save(path)
# Return its location
return path
if quadrent == "base":
# Return the power (number of zoom levels)
return p
else:
# Return its location
return path