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/*
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// gl_refrag.c
#include "quakedef.h"
#include "gl_model.h"
#include "gl_local.h"
mnode_t *r_pefragtopnode;
//===========================================================================
/*
===============================================================================
ENTITY FRAGMENT FUNCTIONS
===============================================================================
*/
efrag_t **lastlink;
vec3_t r_emins, r_emaxs;
entity_t *r_addent;
//Call when removing an object from the world or moving it to another position
void R_RemoveEfrags (entity_t *ent) {
efrag_t *ef, *old, *walk, **prev;
ef = ent->efrag;
while (ef) {
prev = &ef->leaf->efrags;
while (1) {
walk = *prev;
if (!walk)
break;
if (walk == ef) {
// remove this fragment
*prev = ef->leafnext;
break;
} else {
prev = &walk->leafnext;
}
}
old = ef;
ef = ef->entnext;
// put it on the free list
old->entnext = cl.free_efrags;
cl.free_efrags = old;
}
ent->efrag = NULL;
}
void R_SplitEntityOnNode (mnode_t *node) {
efrag_t *ef;
mplane_t *splitplane;
mleaf_t *leaf;
int sides;
if (node->contents == CONTENTS_SOLID)
return;
// add an efrag if the node is a leaf
if ( node->contents < 0) {
if (!r_pefragtopnode)
r_pefragtopnode = node;
leaf = (mleaf_t *)node;
// grab an efrag off the free list
if (!(ef = cl.free_efrags)) {
Com_Printf ("Too many efrags!\n");
return; // no free fragments...
}
cl.free_efrags = cl.free_efrags->entnext;
ef->entity = r_addent;
// add the entity link
*lastlink = ef;
lastlink = &ef->entnext;
ef->entnext = NULL;
// set the leaf links
ef->leaf = leaf;
ef->leafnext = leaf->efrags;
leaf->efrags = ef;
return;
}
// NODE_MIXED
splitplane = node->plane;
sides = BOX_ON_PLANE_SIDE(r_emins, r_emaxs, splitplane);
if (sides == 3) {
// split on this plane
// if this is the first splitter of this bmodel, remember it
if (!r_pefragtopnode)
r_pefragtopnode = node;
}
// recurse down the contacted sides
if (sides & 1)
R_SplitEntityOnNode (node->children[0]);
if (sides & 2)
R_SplitEntityOnNode (node->children[1]);
}
void R_AddEfrags (entity_t *ent) {
model_t *entmodel;
int i;
if (!ent->model)
return;
r_addent = ent;
lastlink = &ent->efrag;
r_pefragtopnode = NULL;
entmodel = ent->model;
for (i = 0; i < 3; i++) {
r_emins[i] = ent->origin[i] + entmodel->mins[i];
r_emaxs[i] = ent->origin[i] + entmodel->maxs[i];
}
R_SplitEntityOnNode (cl.worldmodel->nodes);
ent->topnode = r_pefragtopnode;
}
void R_StoreEfrags (efrag_t **ppefrag) {
entity_t *pent;
model_t *model;
efrag_t *pefrag;
for (pefrag = *ppefrag; pefrag; pefrag = pefrag->leafnext) {
pent = pefrag->entity;
model = pent->model;
if (model->modhint == MOD_FLAME && !r_drawflame.value)
continue;
switch (model->type) {
case mod_alias:
case mod_alias3:
case mod_brush:
case mod_sprite:
if (pent->visframe != r_framecount) {
CL_AddEntity (pent);
pent->visframe = r_framecount; // mark that we've recorded this entity for this frame
}
break;
default:
Sys_Error ("R_StoreEfrags: Bad entity type %d", model->type);
}
}
}
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