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https://git.code.sf.net/p/quake/quakeforge
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8464d71264
This is the beginning of adding ECS to QF. While the previous iteration of hierarchies was a start in the direction towards ECS, this pulls most of the 3d-specific transform stuff out of the hierarchy "objects", making all the matrices and vectors/quaternions actual components (in the ECS sense). There's more work to be done with respect to the transform and entity members of hierarchy_t (entity should probably go away entirely, and transform should become hierref_t (or whatever its final name becomes), but I wanted to get things working sooner than later. The motivation for the effort was to allow views to use hierarchy_t, which should be possible once I get entity and transform sorted out. I am really glad I already had automated tests for hierarchies, as things proved to be a little tricky to get working due to forgetting why certain things were there.
124 lines
3.2 KiB
C
124 lines
3.2 KiB
C
/*
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component.h
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Component management
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Copyright (C) 2022 Bill Currie <bill@taniwha.org>
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Author: Bill Currie <bill@taniwha.org>
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Date: 2022/10/07
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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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#ifndef __QF_scene_component_h
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#define __QF_scene_component_h
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#include <string.h>
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#include <stdlib.h>
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#include "QF/qtypes.h"
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/** \defgroup entity Hierarchy management
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\ingroup utils
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*/
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///@{
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#define null_transform (~0u)
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typedef struct component_s {
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size_t size;
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void (*create) (void *);
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void (*destroy) (void *);
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const char *name;
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} component_t;
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#define COMPINLINE GNU89INLINE inline
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COMPINLINE void Component_ResizeArray (const component_t *component,
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void **array, uint32_t count);
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COMPINLINE void Component_MoveElements (const component_t *component,
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void *array, uint32_t dstIndex,
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uint32_t srcIndex, uint32_t count);
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COMPINLINE void Component_CopyElements (const component_t *component,
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void *dstArray, uint32_t dstIndex,
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const void *srcArray, uint32_t srcIndex,
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uint32_t count);
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COMPINLINE void Component_CreateElements (const component_t *component,
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void *array,
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uint32_t index, uint32_t count);
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#undef COMPINLINE
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#ifndef IMPLEMENT_COMPONENT_Funcs
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#define COMPINLINE GNU89INLINE inline
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#else
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#define COMPINLINE VISIBLE
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#endif
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COMPINLINE
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void
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Component_ResizeArray (const component_t *component,
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void **array, uint32_t count)
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{
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*array = realloc (*array, count * component->size);
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}
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COMPINLINE
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void
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Component_MoveElements (const component_t *component,
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void *array, uint32_t dstIndex, uint32_t srcIndex,
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uint32_t count)
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{
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__auto_type dst = (byte *) array + dstIndex * component->size;
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__auto_type src = (byte *) array + srcIndex * component->size;
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memmove (dst, src, count * component->size);
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}
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COMPINLINE
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void
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Component_CopyElements (const component_t *component,
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void *dstArray, uint32_t dstIndex,
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const void *srcArray, uint32_t srcIndex,
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uint32_t count)
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{
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__auto_type dst = (byte *) dstArray + dstIndex * component->size;
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__auto_type src = (byte *) srcArray + srcIndex * component->size;
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memcpy (dst, src, count * component->size);
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}
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COMPINLINE
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void
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Component_CreateElements (const component_t *component, void *array,
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uint32_t index, uint32_t count)
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{
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if (component->create) {
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for (uint32_t i = index; count-- > 0; i++) {
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__auto_type dst = (byte *) array + i * component->size;
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component->create (dst);
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}
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} else {
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__auto_type dst = (byte *) array + index * component->size;
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memset (dst, 0, count * component->size);
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}
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}
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///@}
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#endif//__QF_scene_component_h
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