mirror of
https://github.com/dhewm/dhewm3.git
synced 2024-11-30 16:11:11 +00:00
359 lines
8.8 KiB
C++
359 lines
8.8 KiB
C++
/*
|
|
===========================================================================
|
|
|
|
Doom 3 GPL Source Code
|
|
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.
|
|
|
|
This file is part of the Doom 3 GPL Source Code ("Doom 3 Source Code").
|
|
|
|
Doom 3 Source Code 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 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
Doom 3 Source Code 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 Doom 3 Source Code. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code. If not, please request a copy in writing from id Software at the address below.
|
|
|
|
If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
|
|
|
|
===========================================================================
|
|
*/
|
|
|
|
#include "../../../idlib/precompiled.h"
|
|
#pragma hdrstop
|
|
|
|
#include "AASBuild_local.h"
|
|
|
|
|
|
/*
|
|
============
|
|
idAASBuild::SetPortalFlags_r
|
|
============
|
|
*/
|
|
void idAASBuild::SetPortalFlags_r( idBrushBSPNode *node ) {
|
|
int s;
|
|
idBrushBSPPortal *p;
|
|
idVec3 normal;
|
|
|
|
if ( !node ) {
|
|
return;
|
|
}
|
|
|
|
if ( node->GetContents() & AREACONTENTS_SOLID ) {
|
|
return;
|
|
}
|
|
|
|
if ( !node->GetChild(0) && !node->GetChild(1) ) {
|
|
for ( p = node->GetPortals(); p; p = p->Next(s) ) {
|
|
s = (p->GetNode(1) == node);
|
|
|
|
// if solid at the other side of the portal
|
|
if ( p->GetNode(!s)->GetContents() & AREACONTENTS_SOLID ) {
|
|
if ( s ) {
|
|
normal = -p->GetPlane().Normal();
|
|
}
|
|
else {
|
|
normal = p->GetPlane().Normal();
|
|
}
|
|
if ( normal * aasSettings->invGravityDir > aasSettings->minFloorCos ) {
|
|
p->SetFlag( FACE_FLOOR );
|
|
}
|
|
else {
|
|
p->SetFlag( FACE_SOLID );
|
|
}
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
SetPortalFlags_r( node->GetChild(0) );
|
|
SetPortalFlags_r( node->GetChild(1) );
|
|
}
|
|
|
|
/*
|
|
============
|
|
idAASBuild::PortalIsGap
|
|
============
|
|
*/
|
|
bool idAASBuild::PortalIsGap( idBrushBSPPortal *portal, int side ) {
|
|
idVec3 normal;
|
|
|
|
// if solid at the other side of the portal
|
|
if ( portal->GetNode(!side)->GetContents() & AREACONTENTS_SOLID ) {
|
|
return false;
|
|
}
|
|
|
|
if ( side ) {
|
|
normal = -(portal->GetPlane().Normal());
|
|
}
|
|
else {
|
|
normal = portal->GetPlane().Normal();
|
|
}
|
|
if ( normal * aasSettings->invGravityDir > aasSettings->minFloorCos ) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
============
|
|
idAASBuild::GravSubdivLeafNode
|
|
============
|
|
*/
|
|
#define FACE_CHECKED BIT(31)
|
|
#define GRAVSUBDIV_EPSILON 0.1f
|
|
|
|
void idAASBuild::GravSubdivLeafNode( idBrushBSPNode *node ) {
|
|
int s1, s2, i, j, k, side1;
|
|
int numSplits, numSplitters;
|
|
idBrushBSPPortal *p1, *p2;
|
|
idWinding *w1, *w2;
|
|
idVec3 normal;
|
|
idPlane plane;
|
|
idPlaneSet planeList;
|
|
float d, min, max;
|
|
int *splitterOrder;
|
|
int *bestNumSplits;
|
|
int floor, gap, numFloorChecked;
|
|
|
|
// if this leaf node is already classified it cannot have a combination of floor and gap portals
|
|
if ( node->GetFlags() & (AREA_FLOOR|AREA_GAP) ) {
|
|
return;
|
|
}
|
|
|
|
floor = gap = 0;
|
|
|
|
// check if the area has a floor
|
|
for ( p1 = node->GetPortals(); p1; p1 = p1->Next(s1) ) {
|
|
s1 = (p1->GetNode(1) == node);
|
|
|
|
if ( p1->GetFlags() & FACE_FLOOR ) {
|
|
floor++;
|
|
}
|
|
}
|
|
|
|
// find seperating planes between gap and floor portals
|
|
for ( p1 = node->GetPortals(); p1; p1 = p1->Next(s1) ) {
|
|
s1 = (p1->GetNode(1) == node);
|
|
|
|
// if the portal is a gap seen from this side
|
|
if ( PortalIsGap( p1, s1 ) ) {
|
|
gap++;
|
|
// if the area doesn't have a floor
|
|
if ( !floor ) {
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
continue;
|
|
}
|
|
|
|
numFloorChecked = 0;
|
|
|
|
w1 = p1->GetWinding();
|
|
|
|
// test all edges of the gap
|
|
for ( i = 0; i < w1->GetNumPoints(); i++ ) {
|
|
|
|
// create a plane through the edge of the gap parallel to the direction of gravity
|
|
normal = (*w1)[(i+1)%w1->GetNumPoints()].ToVec3() - (*w1)[i].ToVec3();
|
|
normal = normal.Cross( aasSettings->invGravityDir );
|
|
if ( normal.Normalize() < 0.2f ) {
|
|
continue;
|
|
}
|
|
plane.SetNormal( normal );
|
|
plane.FitThroughPoint( (*w1)[i].ToVec3() );
|
|
|
|
// get the side of the plane the gap is on
|
|
side1 = w1->PlaneSide( plane, GRAVSUBDIV_EPSILON );
|
|
if ( side1 == SIDE_ON ) {
|
|
break;
|
|
}
|
|
|
|
// test if the plane through the edge of the gap seperates the gap from a floor portal
|
|
for ( p2 = node->GetPortals(); p2; p2 = p2->Next(s2) ) {
|
|
s2 = (p2->GetNode(1) == node);
|
|
|
|
if ( !( p2->GetFlags() & FACE_FLOOR ) ) {
|
|
continue;
|
|
}
|
|
|
|
if ( p2->GetFlags() & FACE_CHECKED ) {
|
|
continue;
|
|
}
|
|
|
|
w2 = p2->GetWinding();
|
|
|
|
min = 2.0f * GRAVSUBDIV_EPSILON;
|
|
max = GRAVSUBDIV_EPSILON;
|
|
if ( side1 == SIDE_FRONT ) {
|
|
for ( j = 0; j < w2->GetNumPoints(); j++ ) {
|
|
d = plane.Distance( (*w2)[j].ToVec3() );
|
|
if ( d >= GRAVSUBDIV_EPSILON ) {
|
|
break; // point at the same side of the plane as the gap
|
|
}
|
|
d = idMath::Fabs( d );
|
|
if ( d < min ) {
|
|
min = d;
|
|
}
|
|
if ( d > max ) {
|
|
max = d;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
for ( j = 0; j < w2->GetNumPoints(); j++ ) {
|
|
d = plane.Distance( (*w2)[j].ToVec3() );
|
|
if ( d <= -GRAVSUBDIV_EPSILON ) {
|
|
break; // point at the same side of the plane as the gap
|
|
}
|
|
d = idMath::Fabs( d );
|
|
if ( d < min ) {
|
|
min = d;
|
|
}
|
|
if ( d > max ) {
|
|
max = d;
|
|
}
|
|
}
|
|
}
|
|
|
|
// a point of the floor portal was found to be at the same side of the plane as the gap
|
|
if ( j < w2->GetNumPoints() ) {
|
|
continue;
|
|
}
|
|
|
|
// if the floor portal touches the plane
|
|
if ( min < GRAVSUBDIV_EPSILON && max > GRAVSUBDIV_EPSILON ) {
|
|
planeList.FindPlane( plane, 0.00001f, 0.1f );
|
|
}
|
|
|
|
p2->SetFlag( FACE_CHECKED );
|
|
numFloorChecked++;
|
|
|
|
}
|
|
if ( numFloorChecked == floor ) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
for ( p2 = node->GetPortals(); p2; p2 = p2->Next(s2) ) {
|
|
s2 = (p2->GetNode(1) == node);
|
|
p2->RemoveFlag( FACE_CHECKED );
|
|
}
|
|
}
|
|
|
|
// if the leaf node does not have both floor and gap portals
|
|
if ( !( gap && floor) ) {
|
|
if ( floor ) {
|
|
node->SetFlag( AREA_FLOOR );
|
|
}
|
|
else if ( gap ) {
|
|
node->SetFlag( AREA_GAP );
|
|
}
|
|
return;
|
|
}
|
|
|
|
// if no valid seperators found
|
|
if ( planeList.Num() == 0 ) {
|
|
// NOTE: this should never happend, if it does the leaf node has degenerate portals
|
|
return;
|
|
}
|
|
|
|
splitterOrder = (int *) _alloca( planeList.Num() * sizeof( int ) );
|
|
bestNumSplits = (int *) _alloca( planeList.Num() * sizeof( int ) );
|
|
numSplitters = 0;
|
|
|
|
// test all possible seperators and sort them from best to worst
|
|
for ( i = 0; i < planeList.Num(); i += 2 ) {
|
|
numSplits = 0;
|
|
|
|
for ( p1 = node->GetPortals(); p1; p1 = p1->Next(s1) ) {
|
|
s1 = (p1->GetNode(1) == node);
|
|
if ( p1->GetWinding()->PlaneSide( planeList[i], 0.1f ) == SIDE_CROSS ) {
|
|
numSplits++;
|
|
}
|
|
}
|
|
|
|
for ( j = 0; j < numSplitters; j++ ) {
|
|
if ( numSplits < bestNumSplits[j] ) {
|
|
for ( k = numSplitters; k > j; k-- ) {
|
|
bestNumSplits[k] = bestNumSplits[k-1];
|
|
splitterOrder[k] = splitterOrder[k-1];
|
|
}
|
|
bestNumSplits[j] = numSplits;
|
|
splitterOrder[j] = i;
|
|
numSplitters++;
|
|
break;
|
|
}
|
|
}
|
|
if ( j >= numSplitters ) {
|
|
bestNumSplits[j] = numSplits;
|
|
splitterOrder[j] = i;
|
|
numSplitters++;
|
|
}
|
|
}
|
|
|
|
// try all seperators in order from best to worst
|
|
for ( i = 0; i < numSplitters; i++ ) {
|
|
if ( node->Split( planeList[splitterOrder[i]], -1 ) ) {
|
|
// we found a seperator that works
|
|
break;
|
|
}
|
|
}
|
|
if ( i >= numSplitters) {
|
|
return;
|
|
}
|
|
|
|
DisplayRealTimeString( "\r%6d", ++numGravitationalSubdivisions );
|
|
|
|
// test children for further splits
|
|
GravSubdivLeafNode( node->GetChild(0) );
|
|
GravSubdivLeafNode( node->GetChild(1) );
|
|
}
|
|
|
|
/*
|
|
============
|
|
idAASBuild::GravSubdiv_r
|
|
============
|
|
*/
|
|
void idAASBuild::GravSubdiv_r( idBrushBSPNode *node ) {
|
|
|
|
if ( !node ) {
|
|
return;
|
|
}
|
|
|
|
if ( node->GetContents() & AREACONTENTS_SOLID ) {
|
|
return;
|
|
}
|
|
|
|
if ( !node->GetChild(0) && !node->GetChild(1) ) {
|
|
GravSubdivLeafNode( node );
|
|
return;
|
|
}
|
|
|
|
GravSubdiv_r( node->GetChild(0) );
|
|
GravSubdiv_r( node->GetChild(1) );
|
|
}
|
|
|
|
/*
|
|
============
|
|
idAASBuild::GravitationalSubdivision
|
|
============
|
|
*/
|
|
void idAASBuild::GravitationalSubdivision( idBrushBSP &bsp ) {
|
|
numGravitationalSubdivisions = 0;
|
|
|
|
common->Printf( "[Gravitational Subdivision]\n" );
|
|
|
|
SetPortalFlags_r( bsp.GetRootNode() );
|
|
GravSubdiv_r( bsp.GetRootNode() );
|
|
|
|
common->Printf( "\r%6d subdivisions\n", numGravitationalSubdivisions );
|
|
}
|