101 lines
3.8 KiB
Python
101 lines
3.8 KiB
Python
"""
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RenderPipeline
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Copyright (c) 2014-2016 tobspr <tobias.springer1@gmail.com>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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"""
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from __future__ import print_function, division
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from rplibs.six.moves import range # pylint: disable=import-error
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from panda3d.core import LVecBase4i, LVecBase4
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class ShadowAtlas(object):
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""" Please refer to the native C++ implementation for docstrings and comments.
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This is just the python implementation, which does not contain documentation! """
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def __init__(self, size, tile_size=32):
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self._size = size
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self._tile_size = tile_size
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self._num_used_tiles = 0
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self.init_tiles()
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def init_tiles(self):
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self._num_tiles = self._size // self._tile_size
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def row():
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return [False for i in range(self._num_tiles)] # pylint: disable=unused-variable
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self._flags = [row() for j in range(self._num_tiles)] # pylint: disable=unused-variable
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def get_num_used_tiles(self):
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return self._num_used_tiles
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num_used_tiles = property(get_num_used_tiles)
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def get_coverage(self):
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return self._num_used_tiles / float(self._num_tiles ** 2)
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coverage = property(get_coverage)
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def reserve_region(self, x, y, w, h):
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self._num_used_tiles += w * h
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for x_offset in range(w):
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for y_offset in range(h):
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self._flags[x + x_offset][y + y_offset] = True
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def find_and_reserve_region(self, tile_width, tile_height):
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for x in range(self._num_tiles - tile_height + 1):
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for y in range(self._num_tiles - tile_width + 1):
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if self.region_is_free(x, y, tile_width, tile_height):
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self.reserve_region(x, y, tile_width, tile_height)
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return LVecBase4i(x, y, tile_width, tile_height)
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print("Failed to find a free region of size", tile_width, "x", tile_height)
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return LVecBase4i(-1)
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def free_region(self, region):
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self._num_used_tiles -= region.z * region.w
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for x in range(region.z):
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for y in range(region.w):
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self._flags[region.x + x][region.y + y] = False
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def get_tile_size(self):
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return self._tile_size
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def region_is_free(self, x, y, w, h):
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for x_offset in range(w):
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for y_offset in range(h):
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if self._flags[x + x_offset][y + y_offset]:
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return False
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return True
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def get_required_tiles(self, resolution):
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if resolution % self._tile_size != 0:
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print("ShadowAtlas: Invalid atlas resolution!")
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return
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return resolution // self._tile_size
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def region_to_uv(self, region):
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flt = LVecBase4(region.x, region.y, region.z, region.w)
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return flt * (self._tile_size / self._size)
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