ew-engine/hq engine src/world.c

/*
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.

*/
// world.c -- world query functions

#include "quakedef.h"

/*

entities never clip against themselves, or their owner

line of sight checks trace->crosscontent, but bullets don't

*/

typedef struct
{
	vec3_t		boxmins, boxmaxs;// enclose the test object along entire move
//	vec3_t		hullmins, hullmaxs;//Tei: Darkplaces SV_Move clipping

	float		*mins, *maxs;	// size of the moving object
	vec3_t		mins2, maxs2;	// size when clipping against mosnters
	float		*start, *end;
	trace_t		trace;
	int			type;
	edict_t		*passedict;
} moveclip_t;


int SV_HullPointContents (hull_t *hull, int num, vec3_t p);

/*
===============================================================================

HULL BOXES

===============================================================================
*/

static	hull_t		box_hull;
static	dclipnode_t	box_clipnodes[6];
static	mplane_t	box_planes[6];

/*
===================
SV_InitBoxHull

Set up the planes and clipnodes so that the six floats of a bounding box
can just be stored out and get a proper hull_t structure.
===================
*/
void SV_InitBoxHull (void)
{
	int		i;
	int		side;

	box_hull.clipnodes = box_clipnodes;
	box_hull.planes = box_planes;
	box_hull.firstclipnode = 0;
	box_hull.lastclipnode = 5;

	for (i=0 ; i<6 ; i++)
	{
		box_clipnodes[i].planenum = i;
		
		side = i&1;
		
		box_clipnodes[i].children[side] = CONTENTS_EMPTY;
		if (i != 5)
			box_clipnodes[i].children[side^1] = i + 1;
		else
			box_clipnodes[i].children[side^1] = CONTENTS_SOLID;
		
		box_planes[i].type = i>>1;
		box_planes[i].normal[i>>1] = 1;
	}
	
}

/*
===================
SV_HullForBox

To keep everything totally uniform, bounding boxes are turned into small
BSP trees instead of being compared directly.
===================
*/
hull_t	*SV_HullForBox (vec3_t mins, vec3_t maxs)
{
	box_planes[0].dist = maxs[0];
	box_planes[1].dist = mins[0];
	box_planes[2].dist = maxs[1];
	box_planes[3].dist = mins[1];
	box_planes[4].dist = maxs[2];
	box_planes[5].dist = mins[2];

	return &box_hull;
}

/*
================
SV_HullForEntity

Returns a hull that can be used for testing or clipping an object of mins/maxs
size.
Offset is filled in to contain the adjustment that must be added to the
testing object's origin to get a point to use with the returned hull.
================
*/
hull_t *SV_HullForEntity (edict_t *ent, vec3_t mins, vec3_t maxs, vec3_t offset)
{
	model_t		*model;
	vec3_t		size;
	vec3_t		hullmins, hullmaxs;
	hull_t		*hull;

// decide which clipping hull to use, based on the size
	if (ent->v.solid == SOLID_BSP)
	{	// explicit hulls in the BSP model
		if (ent->v.movetype != MOVETYPE_PUSH)
			Sys_Error ("SOLID_BSP with a non bsp model");

		model = sv.models[ (int)ent->v.modelindex ];

		if (!model || model->type != mod_brush)
// koval -->
//            Sys_Error ("MOVETYPE_PUSH with a non bsp model");
            Sys_Error ("SOLID_BSP with a non bsp model");
// <-- koval


		VectorSubtract (maxs, mins, size);

		if (size[0] < 3)
			hull = &model->hulls[0]; // 0x0x0
		else if (size[0] <= 32)
		{
			if (size[2] < 33) // pick the nearest of 32 or 56
				hull = &model->hulls[3]; // 32x32x32
			else
				hull = &model->hulls[1]; // 32x32x56
		}
		else
			hull = &model->hulls[2]; // 64x64x88

// calculate an offset value to center the origin
		VectorSubtract (hull->clip_mins, mins, offset);
		VectorAdd (offset, ent->v.origin, offset);
	}
	else
	{	// create a temp hull from bounding box sizes

		VectorSubtract (ent->v.mins, maxs, hullmins);
		VectorSubtract (ent->v.maxs, mins, hullmaxs);
		hull = SV_HullForBox (hullmins, hullmaxs);
		
		VectorCopy (ent->v.origin, offset);
	}


	return hull;
}

/*
===============================================================================

ENTITY AREA CHECKING

===============================================================================
*/

typedef struct areanode_s
{
	int		axis;		// -1 = leaf node
	float	dist;
	struct areanode_s	*children[2];
	link_t	trigger_edicts;
	link_t	solid_edicts;
} areanode_t;

#define	AREA_DEPTH	4
#define	AREA_NODES	32

static	areanode_t	sv_areanodes[AREA_NODES];
static	int			sv_numareanodes;

/*
===============
SV_CreateAreaNode

===============
*/
areanode_t *SV_CreateAreaNode (int depth, vec3_t mins, vec3_t maxs)
{
	areanode_t	*anode;
	vec3_t		size;
	vec3_t		mins1, maxs1, mins2, maxs2;

	anode = &sv_areanodes[sv_numareanodes];
	sv_numareanodes++;

	ClearLink (&anode->trigger_edicts);
	ClearLink (&anode->solid_edicts);
	
	if (depth == AREA_DEPTH)
	{
		anode->axis = -1;
		anode->children[0] = anode->children[1] = NULL;
		return anode;
	}
	
	VectorSubtract (maxs, mins, size);
	if (size[0] > size[1])
		anode->axis = 0;
	else
		anode->axis = 1;
	
	anode->dist = 0.5 * (maxs[anode->axis] + mins[anode->axis]);
	VectorCopy (mins, mins1);	
	VectorCopy (mins, mins2);	
	VectorCopy (maxs, maxs1);	
	VectorCopy (maxs, maxs2);	
	
	maxs1[anode->axis] = mins2[anode->axis] = anode->dist;
	
	anode->children[0] = SV_CreateAreaNode (depth+1, mins2, maxs2);
	anode->children[1] = SV_CreateAreaNode (depth+1, mins1, maxs1);

	return anode;
}

/*
===============
SV_ClearWorld

===============
*/
void Collision_Init (void);//Tei lh traces
void SV_ClearWorld (void)
{
	SV_InitBoxHull ();
	Collision_Init ();
	
	memset (sv_areanodes, 0, sizeof(sv_areanodes));
	sv_numareanodes = 0;
	SV_CreateAreaNode (0, sv.worldmodel->mins, sv.worldmodel->maxs);
}


/*
===============
SV_UnlinkEdict

===============
*/
void SV_UnlinkEdict (edict_t *ent)
{
	if (!ent->area.prev)
		return;		// not linked in anywhere
	RemoveLink (&ent->area);
	ent->area.prev = ent->area.next = NULL;
}


/*
====================
SV_TouchLinks
====================
*/
void SV_TouchLinks ( edict_t *ent, areanode_t *node )
{
	link_t		*l, *next;
	edict_t		*touch;
	int			old_self, old_other;

// touch linked edicts
	for (l = node->trigger_edicts.next ; l != &node->trigger_edicts ; l = next)
	{
		next = l->next;
		touch = EDICT_FROM_AREA(l);
		if (touch == ent)
			continue;
		if (!touch->v.touch || touch->v.solid != SOLID_TRIGGER)
			continue;
		if (ent->v.absmin[0] > touch->v.absmax[0]
		|| ent->v.absmin[1] > touch->v.absmax[1]
		|| ent->v.absmin[2] > touch->v.absmax[2]
		|| ent->v.absmax[0] < touch->v.absmin[0]
		|| ent->v.absmax[1] < touch->v.absmin[1]
		|| ent->v.absmax[2] < touch->v.absmin[2] )
			continue;
		old_self = pr_global_struct->self;
		old_other = pr_global_struct->other;

		pr_global_struct->self = EDICT_TO_PROG(touch);
		pr_global_struct->other = EDICT_TO_PROG(ent);
		pr_global_struct->time = sv.time;
		PR_ExecuteProgram (touch->v.touch);

		pr_global_struct->self = old_self;
		pr_global_struct->other = old_other;
	}
	
// recurse down both sides
	if (node->axis == -1)
		return;
	
	if ( ent->v.absmax[node->axis] > node->dist )
		SV_TouchLinks ( ent, node->children[0] );
	if ( ent->v.absmin[node->axis] < node->dist )
		SV_TouchLinks ( ent, node->children[1] );
}


/*
===============
SV_FindTouchedLeafs

===============
*/
void SV_FindTouchedLeafs (edict_t *ent, mnode_t *node)
{
	mplane_t	*splitplane;
	mleaf_t		*leaf;
	int			sides;
	int			leafnum;

	if (node->contents == CONTENTS_SOLID)
		return;
	
// add an efrag if the node is a leaf

	if (node->contents < 0)
	{
		if (ent->num_leafs == MAX_ENT_LEAFS)
			return;

		leaf = (mleaf_t *)node;
		leafnum = leaf - sv.worldmodel->leafs - 1;

		ent->leafnums[ent->num_leafs] = leafnum;
		ent->num_leafs++;			
		return;
	}
	
// NODE_MIXED

	splitplane = node->plane;
	sides = BOX_ON_PLANE_SIDE(ent->v.absmin, ent->v.absmax, splitplane);
	
// recurse down the contacted sides
	if (sides & 1)
		SV_FindTouchedLeafs (ent, node->children[0]);
		
	if (sides & 2)
		SV_FindTouchedLeafs (ent, node->children[1]);
}

/*
===============
SV_LinkEdict

===============
*/
void SV_LinkEdict (edict_t *ent, qboolean touch_triggers)
{
	areanode_t	*node;

	if (ent->area.prev)
		SV_UnlinkEdict (ent);	// unlink from old position
		
	if (ent == sv.edicts)
		return;		// don't add the world

	if (ent->free)
		return;

	// Tomaz - Rotating BModels Begin
	if (ent->v.solid == SOLID_BSP && (ent->v.angles[0] || ent->v.angles[1] || ent->v.angles[2]) )
	{
		// expand for rotation
		float max = DotProduct(ent->v.mins, ent->v.mins), 
			v = DotProduct(ent->v.maxs, ent->v.maxs);
		int i;

		if (max < v)
			max = v;

		max = sqrt(max);
		for (i=0 ; i<3 ; i++)
		{
			ent->v.absmin[i] = ent->v.origin[i] - max;
			ent->v.absmax[i] = ent->v.origin[i] + max;
		}
	}
	// Tomaz - Rotating BModels End
	else
	{
		VectorAdd (ent->v.origin, ent->v.mins, ent->v.absmin);	
		VectorAdd (ent->v.origin, ent->v.maxs, ent->v.absmax);
	}

//
// to make items easier to pick up and allow them to be grabbed off
// of shelves, the abs sizes are expanded
//
	
	//Tei: hummm... i dislike that.
	if ((int)ent->v.flags & FL_ITEM)
	{
		ent->v.absmin[0] -= 15;
		ent->v.absmin[1] -= 15;
		ent->v.absmax[0] += 15;
		ent->v.absmax[1] += 15;
	}

	
// link to PVS leafs
	ent->num_leafs = 0;
	if (ent->v.modelindex)
		SV_FindTouchedLeafs (ent, sv.worldmodel->nodes);

	if (ent->v.solid == SOLID_NOT)
		return;

// find the first node that the ent's box crosses
	node = sv_areanodes;
	while (1)
	{
		if (node->axis == -1)
			break;
		if (ent->v.absmin[node->axis] > node->dist)
			node = node->children[0];
		else if (ent->v.absmax[node->axis] < node->dist)
			node = node->children[1];
		else
			break;		// crosses the node
	}
	
// link it in	

	if (ent->v.solid == SOLID_TRIGGER)
		InsertLinkBefore (&ent->area, &node->trigger_edicts);
	else
		InsertLinkBefore (&ent->area, &node->solid_edicts);
	
// if touch_triggers, touch all entities at this node and decend for more
	if (touch_triggers)
		SV_TouchLinks ( ent, sv_areanodes );
}



/*
===============================================================================

POINT TESTING IN HULLS

===============================================================================
*/

/*
==================
SV_HullPointContents

==================
*/
int SV_HullPointContents (hull_t *hull, int num, vec3_t p)
{
	float		d;
	dclipnode_t	*node;
	mplane_t	*plane;

	while (num >= 0)
	{
		if (num < hull->firstclipnode || num > hull->lastclipnode)
			Host_Error ("SV_HullPointContents: bad node number");
	
		node = hull->clipnodes + num;
		plane = hull->planes + node->planenum;
		d = PlaneDiff(p,plane);

		if (d < 0)
			num = node->children[1];
		else
			num = node->children[0];
	}
	
	return num;
}



int SV_TruePointContents (vec3_t p)
{
	return SV_HullPointContents (&sv.worldmodel->hulls[0], 0, p);
}

//===========================================================================

/*
============
SV_TestEntityPosition

This could be a lot more efficient...
============
*/
edict_t	*SV_TestEntityPosition (edict_t *ent)
{
	trace_t	trace;

	trace = SV_Move (ent->v.origin, ent->v.mins, ent->v.maxs, ent->v.origin, 0, ent);
	
	if (trace.startsolid)
		return sv.edicts;
		
	return NULL;
}


/*
===============================================================================

LINE TESTING IN HULLS

===============================================================================
*/

// 1/32 epsilon to keep floating point happy
#define	DIST_EPSILON	(0.03125)

/*
==================
SV_RecursiveHullCheck

==================
*/


qboolean SV_RecursiveHullCheck (hull_t *hull, int num, float p1f, float p2f, vec3_t p1, vec3_t p2, trace_t *trace)
{
	dclipnode_t	*node;
	mplane_t	*plane;
	float		t1, t2;
	float		frac;
	vec3_t		mid;
	int			side;
	float		midf;

// check for empty

#if 0
	//TELEJANO
	//Tei sky detection

	if (num == CONTENTS_SKY)
		trace->insky = true;
	//Tei sky detection
#endif

	if (num < 0)
	{
		if (num != CONTENTS_SOLID)
		{
			trace->allsolid = false;
			if (num == CONTENTS_EMPTY)
				trace->inopen = true;
			else
				trace->inwater = true;
		}
		else
			trace->startsolid = true;
		return true;		// empty
	}

	if (num < hull->firstclipnode || num > hull->lastclipnode)
		Host_Error ("SV_RecursiveHullCheck: bad node number");

//
// find the point distances
//
	node = hull->clipnodes + num;
	plane = hull->planes + node->planenum;
	t1 = PlaneDiff (p1, plane);
	t2 = PlaneDiff (p2, plane);

	if (t1 >= 0 && t2 >= 0)
		return SV_RecursiveHullCheck (hull, node->children[0], p1f, p2f, p1, p2, trace);
	if (t1 < 0 && t2 < 0)
		return SV_RecursiveHullCheck (hull, node->children[1], p1f, p2f, p1, p2, trace);

// put the crosspoint DIST_EPSILON pixels on the near side
	if (t1 < 0)
		frac = (t1 + DIST_EPSILON)/(t1-t2);
	else
		frac = (t1 - DIST_EPSILON)/(t1-t2);
	if (frac < 0)
		frac = 0;
	if (frac > 1)
		frac = 1;
		
	midf = p1f + (p2f - p1f)*frac;

	mid[0] = p1[0] + frac*(p2[0] - p1[0]);
	mid[1] = p1[1] + frac*(p2[1] - p1[1]);
	mid[2] = p1[2] + frac*(p2[2] - p1[2]);

	side = (t1 < 0);

// move up to the node
	if (!SV_RecursiveHullCheck (hull, node->children[side], p1f, midf, p1, mid, trace) )
		return false;

	if (SV_HullPointContents (hull, node->children[side^1], mid)
	!= CONTENTS_SOLID)
// go past the node
		return SV_RecursiveHullCheck (hull, node->children[side^1], midf, p2f, mid, p2, trace);
	
	if (trace->allsolid)
		return false;		// never got out of the solid area
		
//==================
// the other side of the node is solid, this is the impact point
//==================
	if (!side)
	{
		VectorCopy (plane->normal, trace->plane.normal);
		trace->plane.dist = plane->dist;
	}
	else
	{
		VectorSubtract (vec3_origin, plane->normal, trace->plane.normal);
		trace->plane.dist = -plane->dist;
	}

	while (SV_HullPointContents (hull, hull->firstclipnode, mid)
	== CONTENTS_SOLID)
	{ // shouldn't really happen, but does occasionally
		frac -= 0.1f;
		if (frac < 0)
		{
			trace->fraction = midf;
			VectorCopy (mid, trace->endpos);
			Con_DPrintf ("backup past 0\n");
			return false;
		}
		midf = p1f + (p2f - p1f)*frac;

		mid[0] = p1[0] + frac*(p2[0] - p1[0]);
		mid[1] = p1[1] + frac*(p2[1] - p1[1]);
		mid[2] = p1[2] + frac*(p2[2] - p1[2]);
	}

	trace->fraction = midf;
	VectorCopy (mid, trace->endpos);

	return false;
}

//LordHavoc
/*
#define DIST_EPSILON (0.03125)

#define HULLCHECKSTATE_EMPTY 0
#define HULLCHECKSTATE_SOLID 1
#define HULLCHECKSTATE_DONE 2

// LordHavoc: FIXME: this is not thread safe, if threading matters here, pass
// this as a struct to RecursiveHullCheck, RecursiveHullCheck_Impact, etc...

typedef struct
{
	hull_t *hull;
	trace_t *trace;
	double start[3];
	double dist[3];
}
RecursiveHullCheckTraceInfo_t;

RecursiveHullCheckTraceInfo_t RecursiveHullCheckInfo;
#define RHC RecursiveHullCheckInfo

void SV_RecursiveHullCheck_Impact (mplane_t *plane, int side)
{
	// LordHavoc: using doubles for extra accuracy
	double t1, t2, frac;

	// LordHavoc: now that we have found the impact, recalculate the impact
	// point from scratch for maximum accuracy, with an epsilon bias on the
	// surface distance
	frac = plane->dist;
	if (side)
	{
		frac -= DIST_EPSILON;
		VectorNegate (plane->normal, RHC.trace->plane.normal);
		RHC.trace->plane.dist = -plane->dist;
	}
	else
	{
		frac += DIST_EPSILON;
		VectorCopy (plane->normal, RHC.trace->plane.normal);
		RHC.trace->plane.dist = plane->dist;
	}

	if (plane->type < 3)
	{
		t1 = RHC.start[plane->type] - frac;
		t2 = RHC.start[plane->type] + RHC.dist[plane->type] - frac;
	}
	else
	{
		t1 = plane->normal[0] * RHC.start[0] + plane->normal[1] * RHC.start[1] + plane->normal[2] * RHC.start[2] - frac;
		t2 = plane->normal[0] * (RHC.start[0] + RHC.dist[0]) + plane->normal[1] * (RHC.start[1] + RHC.dist[1]) + plane->normal[2] * (RHC.start[2] + RHC.dist[2]) - frac;
	}

	frac = t1 / (t1 - t2);
	frac = bound(0.0f, frac, 1.0);

	RHC.trace->fraction = frac;
	RHC.trace->endpos[0] = RHC.start[0] + frac * RHC.dist[0];
	RHC.trace->endpos[1] = RHC.start[1] + frac * RHC.dist[1];
	RHC.trace->endpos[2] = RHC.start[2] + frac * RHC.dist[2];
}

int xSV_RecursiveHullCheck (int num, double p1f, double p2f, double p1[3], double p2[3])
{
	dclipnode_t	*node;
	int			side;
	double		midf, mid[3];
	// LordHavoc: FIXME: this is not thread safe...  if threading matters here,
	// remove the static prefixes
	static int ret;
	static mplane_t *plane;
	static double t1, t2, frac;

	// LordHavoc: a goto!  everyone flee in terror... :)
loc0:
	// check for empty
	if (num < 0)
	{
		RHC.trace->endcontents = num;
		if (RHC.trace->startcontents)
		{
			if (num == RHC.trace->startcontents)
				RHC.trace->allsolid = false;
			else
			{
				// if the first leaf is solid, set startsolid
				if (RHC.trace->allsolid)
					RHC.trace->startsolid = true;
				return HULLCHECKSTATE_SOLID;
			}
			return HULLCHECKSTATE_EMPTY;
		}
		else
		{
			if (num != CONTENTS_SOLID)
			{
				RHC.trace->allsolid = false;
				if (num == CONTENTS_EMPTY)
					RHC.trace->inopen = true;
				else
					RHC.trace->inwater = true;
			}
			else
			{
				// if the first leaf is solid, set startsolid
				if (RHC.trace->allsolid)
					RHC.trace->startsolid = true;
				return HULLCHECKSTATE_SOLID;
			}
			return HULLCHECKSTATE_EMPTY;
		}
	}

	// find the point distances
	node = RHC.hull->clipnodes + num;

	plane = RHC.hull->planes + node->planenum;
	if (plane->type < 3)
	{
		t1 = p1[plane->type] - plane->dist;
		t2 = p2[plane->type] - plane->dist;
	}
	else
	{
		t1 = DotProduct (plane->normal, p1) - plane->dist;
		t2 = DotProduct (plane->normal, p2) - plane->dist;
	}

	// LordHavoc: rearranged the side/frac code
	if (t1 >= 0)
	{
		if (t2 >= 0)
		{
			num = node->children[0];
			goto loc0;
		}
		// put the crosspoint DIST_EPSILON pixels on the near side
		side = 0;
	}
	else
	{
		if (t2 < 0)
		{
			num = node->children[1];
			goto loc0;
		}
		// put the crosspoint DIST_EPSILON pixels on the near side
		side = 1;
	}

	frac = t1 / (t1 - t2);
	frac = bound(0.0f, frac, 1.0);

	midf = p1f + ((p2f - p1f) * frac);
	mid[0] = RHC.start[0] + midf * RHC.dist[0];
	mid[1] = RHC.start[1] + midf * RHC.dist[1];
	mid[2] = RHC.start[2] + midf * RHC.dist[2];

	// front side first
	ret = SV_RecursiveHullCheck (node->children[side], p1f, midf, p1, mid);
	if (ret != HULLCHECKSTATE_EMPTY)
		return ret; // solid or done
	ret = SV_RecursiveHullCheck (node->children[!side], midf, p2f, mid, p2);
	if (ret != HULLCHECKSTATE_SOLID)
		return ret; // empty or done

	// front is air and back is solid, this is the impact point...
	SV_RecursiveHullCheck_Impact(RHC.hull->planes + node->planenum, side);

	return HULLCHECKSTATE_DONE;
}

*/
//LordHavoc




/*
==================
SV_ClipMoveToEntity

Handles selection or creation of a clipping hull, and offseting (and
eventually rotation) of the end points
==================
*/

void FillInTrace( trace_t * trace, vec3_t end)
{
	memset (trace, 0, sizeof(trace_t));
	trace->fraction = 1;
	trace->allsolid = true;
	VectorCopy (end, trace->endpos);
}

void ENV_ClipMoveToEntity(edict_t *ent, vec3_t start, vec3_t mins, vec3_t maxs, vec3_t end, trace_t *trace);


trace_t SV_ClipMoveToEntity (edict_t *ent, vec3_t start, vec3_t mins, vec3_t maxs, vec3_t end)
{
	trace_t		trace;
	trace_t		trace2;
	vec3_t		offset;
	vec3_t		start_l, end_l;
	hull_t		*hull;

// fill in a default trace
	FillInTrace(&trace,end);
	/*
	memset (&trace, 0, sizeof(trace_t));
	trace.fraction = 1;
	trace.allsolid = true;
	VectorCopy (end, trace.endpos);
	*/

// get the clipping hull
	hull = SV_HullForEntity (ent, mins, maxs, offset);

	VectorSubtract (start, offset, start_l);
	VectorSubtract (end, offset, end_l);

	// Tomaz - Rotating BModels Begin
	// rotate start and end into the models frame of reference
	if (ent->v.solid == SOLID_BSP && (ent->v.angles[0] || ent->v.angles[1] || ent->v.angles[2]) )
	{
		vec3_t	forward, right, up;
		vec3_t	temp;

		AngleVectors (ent->v.angles, forward, right, up);

		VectorCopy (start_l, temp);
		start_l[0] = DotProduct (temp, forward);
		start_l[1] = -DotProduct (temp, right);
		start_l[2] = DotProduct (temp, up);

		VectorCopy (end_l, temp);
		end_l[0] = DotProduct (temp, forward);
		end_l[1] = -DotProduct (temp, right);
		end_l[2] = DotProduct (temp, up);
	}
	// Tomaz - Rotating BModels End

// trace a line through the apropriate clipping hull
	SV_RecursiveHullCheck (hull, hull->firstclipnode, 0, 1, start_l, end_l, &trace);

	// Tomaz - Rotating BModels Begin
	// rotate endpos back to world frame of reference
	if (ent->v.solid == SOLID_BSP && (ent->v.angles[0] || ent->v.angles[1] || ent->v.angles[2]))
	{
		vec3_t	a;
		vec3_t	forward, right, up;
		vec3_t	temp;

		if (trace.fraction != 1)
		{
			VectorSubtract (vec3_origin, ent->v.angles, a);
			AngleVectors (a, forward, right, up);

			VectorCopy (trace.endpos, temp);
			trace.endpos[0] = DotProduct (temp, forward);
			trace.endpos[1] = -DotProduct (temp, right);
			trace.endpos[2] = DotProduct (temp, up);

			VectorCopy (trace.plane.normal, temp);
			trace.plane.normal[0] = DotProduct (temp, forward);
			trace.plane.normal[1] = -DotProduct (temp, right);
			trace.plane.normal[2] = DotProduct (temp, up);
		}
	}
	// Tomaz - Rotating BModels End

// fix trace up by the offset
	if (trace.fraction != 1)
		VectorAdd (trace.endpos, offset, trace.endpos);

// did we clip the move?
	if (trace.fraction < 1 || trace.startsolid  )
		trace.ent = ent;


	//if ( temp1.value == 33)

//Tei ENV support
	FillInTrace(&trace2,end);
    ENV_ClipMoveToEntity(ent,start,mins,maxs,end,&trace2);

	if (trace2.fraction <1 || trace2.startsolid)
	{

		VectorCopy(trace.plane.normal, trace2.plane.normal);

		//trace.startsolid = trace2.startsolid;
		//trace.allsolid = trace2.allsolid;

		trace.fraction = trace2.fraction;
		trace.ent = &sv.edicts[0];
		VectorCopy(trace.endpos, trace2.endpos);
		//memcpy(&trace,&trace2,sizeof(trace_t));		

	}
//Tei ENV support

	return trace;
}

//===========================================================================

/*
====================
SV_ClipToLinks

Mins and maxs enclose the entire area swept by the move
====================
*/
void Old_SV_ClipToLinks ( areanode_t *node, moveclip_t *clip )
{
	link_t		*l, *next;
	edict_t		*touch;
	trace_t		trace;

// touch linked edicts
	for (l = node->solid_edicts.next ; l != &node->solid_edicts ; l = next)
	{
		next = l->next;
		touch = EDICT_FROM_AREA(l);
		if (touch->v.solid == SOLID_NOT)
			continue;
		if (touch == clip->passedict)
			continue;
		if (touch->v.solid == SOLID_TRIGGER)
			Sys_Error ("Trigger in clipping list");

		if (clip->type == MOVE_NOMONSTERS && touch->v.solid != SOLID_BSP)
			continue;

		if (clip->boxmins[0] > touch->v.absmax[0]
		|| clip->boxmins[1] > touch->v.absmax[1]
		|| clip->boxmins[2] > touch->v.absmax[2]
		|| clip->boxmaxs[0] < touch->v.absmin[0]
		|| clip->boxmaxs[1] < touch->v.absmin[1]
		|| clip->boxmaxs[2] < touch->v.absmin[2] )
			continue;

		if (clip->passedict && clip->passedict->v.size[0] && !touch->v.size[0])
			continue;	// points never interact

	// might intersect, so do an exact clip
		if (clip->trace.allsolid)
			return;
		if (clip->passedict)
		{
		 	if (PROG_TO_EDICT(touch->v.owner) == clip->passedict)
				continue;	// don't clip against own missiles
			if (PROG_TO_EDICT(clip->passedict->v.owner) == touch)
				continue;	// don't clip against owner
		}

		if ((int)touch->v.flags & FL_MONSTER)
			trace = SV_ClipMoveToEntity (touch, clip->start, clip->mins2, clip->maxs2, clip->end);
		else
			trace = SV_ClipMoveToEntity (touch, clip->start, clip->mins, clip->maxs, clip->end);
		if (trace.allsolid || trace.startsolid ||
		trace.fraction < clip->trace.fraction)
		{
			trace.ent = touch;
		 	if (clip->trace.startsolid)
			{
				clip->trace = trace;
				clip->trace.startsolid = true;
			}
			else
				clip->trace = trace;
		}
		else if (trace.startsolid)
			clip->trace.startsolid = true;
	}
	
// recurse down both sides
	if (node->axis == -1)
		return;

	if ( clip->boxmaxs[node->axis] > node->dist )
		Old_SV_ClipToLinks ( node->children[0], clip );
	if ( clip->boxmins[node->axis] < node->dist )
		Old_SV_ClipToLinks ( node->children[1], clip );
}

//LoardHavoc Optimize
void SV_ClipToLinks ( areanode_t *node, moveclip_t *clip )
{
	link_t		*l, *next;
	edict_t		*touch;
	trace_t		trace;

loc0:
	if (clip->trace.allsolid)
		return;
// touch linked edicts
	for (l = node->solid_edicts.next ; l != &node->solid_edicts ; l = next)
	{
		next = l->next;
		touch = EDICT_FROM_AREA(l);
		if (touch->v.solid == SOLID_NOT)
			continue;
		if (touch == clip->passedict)
			continue;
		if (touch->v.solid == SOLID_TRIGGER)
			Host_Error ("Trigger in clipping list");

		if (clip->type == MOVE_NOMONSTERS && touch->v.solid != SOLID_BSP)
			continue;

		if (clip->boxmins[0] > touch->v.absmax[0]
		 || clip->boxmaxs[0] < touch->v.absmin[0]
		 || clip->boxmins[1] > touch->v.absmax[1]
		 || clip->boxmaxs[1] < touch->v.absmin[1]
		 || clip->boxmins[2] > touch->v.absmax[2]
		 || clip->boxmaxs[2] < touch->v.absmin[2])
			continue;

		if (clip->passedict)
		{
			if (clip->passedict->v.size[0] && !touch->v.size[0])
				continue;	// points never interact
		 	if (PROG_TO_EDICT(touch->v.owner) == clip->passedict)
				continue;	// don't clip against own missiles
			if (PROG_TO_EDICT(clip->passedict->v.owner) == touch)
				continue;	// don't clip against owner

			// LordHavoc: corpse code
			if (clip->passedict->v.solid == SOLID_CORPSE && (touch->v.solid == SOLID_SLIDEBOX || touch->v.solid == SOLID_CORPSE))
				continue;
			if (clip->passedict->v.solid == SOLID_SLIDEBOX && touch->v.solid == SOLID_CORPSE)
				continue;
		}

		// might interact, so do an exact clip
		if ((int)touch->v.flags & FL_MONSTER)
			trace = SV_ClipMoveToEntity (touch, clip->start, clip->mins2, clip->maxs2, clip->end);
		else
			trace = SV_ClipMoveToEntity (touch, clip->start, clip->mins, clip->maxs, clip->end);
		if (trace.allsolid)
		{
			clip->trace = trace;
			return;
		}
		if (trace.startsolid || trace.fraction < clip->trace.fraction)
		{
			if (clip->trace.startsolid)
			{
				clip->trace = trace;
				clip->trace.startsolid = true;
			}
			else
				clip->trace = trace;
		}
	}

// recurse down both sides
	if (node->axis == -1)
		return;

	// LordHavoc: optimized recursion
//	if (clip->boxmaxs[node->axis] > node->dist) SV_ClipToLinks(node->children[0], clip);
//	if (clip->boxmins[node->axis] < node->dist) SV_ClipToLinks(node->children[1], clip);
	if (clip->boxmaxs[node->axis] > node->dist)
	{
		if (clip->boxmins[node->axis] < node->dist)
			SV_ClipToLinks(node->children[1], clip);
		node = node->children[0];
		goto loc0;
	}
	else if (clip->boxmins[node->axis] < node->dist)
	{
		node = node->children[1];
		goto loc0;
	}
}

//LoardHavoc Optimize

/*
==================
SV_MoveBounds
==================
*/
void SV_MoveBounds (vec3_t start, vec3_t mins, vec3_t maxs, vec3_t end, vec3_t boxmins, vec3_t boxmaxs)
{
	int		i;
	
	for (i=0 ; i<3 ; i++)
	{
		if (end[i] > start[i])
		{
			boxmins[i] = start[i] + mins[i] - 1;
			boxmaxs[i] = end[i] + maxs[i] + 1;
		}
		else
		{
			boxmins[i] = end[i] + mins[i] - 1;
			boxmaxs[i] = start[i] + maxs[i] + 1;
		}
	}
}

/*
==================
SV_Move
==================
*/
#if 1 //standard version
trace_t SV_Move (vec3_t start, vec3_t mins, vec3_t maxs, vec3_t end, int type, edict_t *passedict)
{
	moveclip_t	clip;
	int i;
	
	memset ( &clip, 0, sizeof ( moveclip_t ) );

// clip to world
	clip.trace = SV_ClipMoveToEntity ( sv.edicts, start, mins, maxs, end );

	clip.start = start;
	clip.end = end;
	clip.mins = mins;
	clip.maxs = maxs;
	clip.type = type;
	clip.passedict = passedict;

	if (type == MOVE_MISSILE)
	{
#if 1 //Tei, lh fix for that
		// LordHavoc: modified this, was = -15, now = clip.mins[i] - 15
		for (i=0 ; i<3 ; i++)
		{
			clip.mins2[i] = clip.mins[i] - 15;
			clip.maxs2[i] = clip.maxs[i] + 15;
		}
#else //old code
		clip.mins2[0] = -15;
		clip.mins2[1] = -15;
		clip.mins2[2] = -15;

		clip.maxs2[0] = 15;
		clip.maxs2[1] = 15;
		clip.maxs2[2] = 15;
#endif
	}
	else
	{
		VectorCopy (mins, clip.mins2);
		VectorCopy (maxs, clip.maxs2);
	}
	
// create the bounding box of the entire move
	SV_MoveBounds ( start, clip.mins2, clip.maxs2, end, clip.boxmins, clip.boxmaxs );

// clip to entities
	SV_ClipToLinks ( sv_areanodes, &clip );

	return clip.trace;
}

#else //Tei: darkplaces version
void Collision_RoundUpToHullSize(const model_t *cmodel, const vec3_t inmins, const vec3_t inmaxs, vec3_t outmins, vec3_t outmaxs);

trace_t SV_Move (vec3_t start, vec3_t mins, vec3_t maxs, vec3_t end, int type, edict_t *passedict)
{
	moveclip_t	clip;
	vec3_t		bigmins, bigmaxs;
	int			i;

	memset ( &clip, 0, sizeof ( moveclip_t ) );

	VectorCopy(start, clip.start);
	VectorCopy(end, clip.end);
	VectorCopy(mins, clip.mins);
	VectorCopy(maxs, clip.maxs);
	clip.type = type;
	clip.passedict = passedict;

	Collision_RoundUpToHullSize(sv.worldmodel, clip.mins, clip.maxs, clip.hullmins, clip.hullmaxs);

	if (type == MOVE_MISSILE)
	{
		// LordHavoc: modified this, was = -15, now = clip.mins[i] - 15
		for (i=0 ; i<3 ; i++)
		{
			clip.mins2[i] = clip.mins[i] - 15;
			clip.maxs2[i] = clip.maxs[i] + 15;
		}
	}
	else
	{
		VectorCopy (clip.mins, clip.mins2);
		VectorCopy (clip.maxs, clip.maxs2);
	}

	bigmins[0] = min(clip.mins2[0], clip.hullmins[0]);
	bigmaxs[0] = max(clip.maxs2[0], clip.hullmaxs[0]);
	bigmins[1] = min(clip.mins2[1], clip.hullmins[1]);
	bigmaxs[1] = max(clip.maxs2[1], clip.hullmaxs[1]);
	bigmins[2] = min(clip.mins2[2], clip.hullmins[2]);
	bigmaxs[2] = max(clip.maxs2[2], clip.hullmaxs[2]);

	// clip to world
	clip.trace = SV_ClipMoveToEntity (sv.edicts, start, mins, maxs, end);

	// clip to entities
	// create the bounding box of the entire move
	SV_MoveBounds ( start, bigmins, bigmaxs, end, clip.boxmins, clip.boxmaxs );

	SV_ClipToLinks ( sv_areanodes, &clip );

	return clip.trace;
}
#endif