85 lines
3.3 KiB
Python
85 lines
3.3 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_ushort, c_void_p, POINTER, addressof
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from engine import (
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buffer, INSTANCE_FLAG_SPAWNED, BATCH_MAX_SIZE, vertex_type, vertex_format,
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create_batch, fill_batch, draw_batch, destroy_batch)
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_flags_t = c_ubyte
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_flags_p = POINTER(_flags_t)
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_mesh_t = c_ushort
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_mesh_p = POINTER(_mesh_t)
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class Batch:
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__slots__ = ('_batch', 'vertices', 'max_size', 'size',
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'flags', '_flags', 'mesh', '_meshes', 'param', '_params', '_name', '__dict__')
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def __init__(self, vertices, max_size, **params_decls):
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assert max_size <= BATCH_MAX_SIZE
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nparams = len(params_decls)
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if nparams:
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self._batch = create_batch(vertices._vertices, max_size, vertex_format(*params_decls.values()))
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else:
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self._batch = create_batch(vertices._vertices, max_size, None)
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self.vertices = vertices
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self.max_size = max_size
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self.size = 0
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self.flags = buffer(_flags_t, max_size)
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self._flags = _flags_p(self.flags)
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self.mesh = buffer(_mesh_t, max_size)
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self._meshes = _mesh_p(self.mesh)
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if nparams:
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self.param = tuple(map(lambda f: buffer(vertex_type(f), max_size), params_decls.values()))
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self._params = (c_void_p * nparams)(*map(addressof, self.param))
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self._name = dict(zip(params_decls.keys(), range(nparams)))
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for name, value in zip(params_decls.keys(), self.param):
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setattr(self, name, value)
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else:
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self.param = None
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self._params = None
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self._name = None
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def __del__(self):
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destroy_batch(self._batch)
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def spawn(self, flags, mesh, **params):
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index = self.size
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assert index < self.max_size
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self.flags[index] = flags | INSTANCE_FLAG_SPAWNED
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self.mesh[index] = mesh
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for name, value in params.items():
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getattr(self, name)[index] = value
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self.size += 1
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return index
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def freeze(self, flags = None, mesh = None, **params):
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if flags is not None:
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self._flags = None if flags else _flags_p(self.flags)
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if mesh is not None:
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self._meshes = None if mesh else _mesh_p(self.mesh)
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for name, value in params.items():
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if value is not None:
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index = self._name[name]
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self._params[index] = None if value else addressof(self.param[index])
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def fill(self):
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fill_batch(self._batch, self.size, self._flags, self._meshes, self._params)
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def draw(self):
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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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