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b230fe18ce
While this does require an extra call after registering components, it allows for multiple component sets (ie, sub-systems) to be registered before the component pools are created. The base id for the registered component set is returned so it can be passed to the subsystem as needed.
77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
/*
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entity.c
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ECS entity management
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Copyright (C) 2022 Bill Currke
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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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.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "QF/heapsort.h"
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#include "QF/sys.h"
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#define IMPLEMENT_ECS_ENTITY_Funcs
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#include "QF/ecs.h"
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VISIBLE void *
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Ent_AddComponent (uint32_t ent, uint32_t comp, ecs_registry_t *registry)
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{
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ecs_pool_t *pool = ®istry->comp_pools[comp];
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uint32_t id = Ent_Index (ent);
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uint32_t ind = pool->sparse[id];
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if (ind >= pool->count || pool->dense[ind] != ent) {
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if (pool->count == pool->max_count) {
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pool->max_count += COMP_GROW;
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pool->dense = realloc (pool->dense,
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pool->max_count * sizeof (uint32_t));
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Component_ResizeArray (®istry->components.a[comp], &pool->data,
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pool->max_count);
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}
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uint32_t ind = pool->count++;
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pool->sparse[id] = ind;
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pool->dense[ind] = ent;
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}
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return Ent_GetComponent (ent, comp, registry);
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}
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VISIBLE void
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Ent_RemoveComponent (uint32_t ent, uint32_t comp, ecs_registry_t *registry)
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{
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uint32_t id = Ent_Index (ent);
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ecs_pool_t *pool = ®istry->comp_pools[comp];
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uint32_t ind = pool->sparse[id];
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if (ind < pool->count && pool->dense[ind] == ent) {
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uint32_t last = pool->count - 1;
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Component_DestroyElements (®istry->components.a[comp], pool->data,
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ind, 1);
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if (last > ind) {
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pool->sparse[Ent_Index (pool->dense[last])] = ind;
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pool->dense[ind] = pool->dense[last];
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Component_MoveElements (®istry->components.a[comp], pool->data,
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ind, last, 1);
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}
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pool->count--;
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pool->sparse[id] = nullent;
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}
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}
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