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