67 lines
2.6 KiB
Python
67 lines
2.6 KiB
Python
# Copyright (C) 2022 RozK
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from ctypes import c_ubyte, c_uint, c_void_p, addressof
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from engine import (
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buffer, INSTANCE_FLAG_SPAWNED, BATCH_MAX_SIZE, param_type, params_format,
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create_batch, fill_batch, draw_batch, destroy_batch)
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class Batch:
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__slots__ = '_batch', '_static', 'vertices', 'size', 'max_size', 'flags', 'meshes', 'params', '_params', '__dict__'
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def __init__(self, vertices, max_size, max_meshes, **params_decls):
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assert max_size <= BATCH_MAX_SIZE
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nparams = len(params_decls)
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names = params_decls.keys()
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formats = params_decls.values()
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self._batch = create_batch(vertices._vertices, max_size, max_meshes, params_format(*formats))
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self._static = False
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self.vertices = vertices
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self.size = 0
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self.max_size = max_size
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self.flags = buffer(c_ubyte, max_size)
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self.meshes = buffer(c_uint, max_size)
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self.params = tuple(map(lambda f: buffer(param_type(f), max_size), formats))
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if nparams:
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self._params = (c_void_p * nparams)(*map(addressof, self.params))
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else:
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self._params = None
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for name, value in zip(names, self.params):
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setattr(self, name, value)
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def __del__(self):
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destroy_batch(self._batch)
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def spawn(self, model, *params):
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assert len(params) == len(self.params)
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index = self.size
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assert index < self.max_size
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self.flags[index] = model.flags | INSTANCE_FLAG_SPAWNED
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self.meshes[index] = model.mesh
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for self_params, param in zip(self.params, params):
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self_params[index] = param
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self.size += 1
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return index
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def make_static(self):
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fill_batch(self._batch, self.size, self.flags, self.meshes, self._params)
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self._static = True
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def draw(self):
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if not self._static:
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fill_batch(self._batch, self.size, self.flags, self.meshes, self._params)
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draw_batch(self._batch)
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