mirror of
https://github.com/dhewm/dhewm3.git
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575 lines
14 KiB
C++
575 lines
14 KiB
C++
/*
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===========================================================================
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Doom 3 GPL Source Code
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Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.
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This file is part of the Doom 3 GPL Source Code ("Doom 3 Source Code").
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Doom 3 Source Code is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Doom 3 Source Code 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. See the
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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 Doom 3 Source Code. If not, see <http://www.gnu.org/licenses/>.
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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.
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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.
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===========================================================================
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*/
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#include "../../../idlib/precompiled.h"
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#pragma hdrstop
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#include "AASBuild_local.h"
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#define LEDGE_EPSILON 0.1f
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//===============================================================
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//
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// idLedge
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//
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//===============================================================
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/*
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============
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idLedge::idLedge
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============
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*/
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idLedge::idLedge( void ) {
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}
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/*
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============
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idLedge::idLedge
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============
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*/
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idLedge::idLedge( const idVec3 &v1, const idVec3 &v2, const idVec3 &gravityDir, idBrushBSPNode *n ) {
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start = v1;
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end = v2;
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node = n;
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numPlanes = 4;
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planes[0].SetNormal( (v1 - v2).Cross( gravityDir ) );
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planes[0].Normalize();
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planes[0].FitThroughPoint( v1 );
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planes[1].SetNormal( (v1 - v2).Cross( planes[0].Normal() ) );
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planes[1].Normalize();
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planes[1].FitThroughPoint( v1 );
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planes[2].SetNormal( v1 - v2 );
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planes[2].Normalize();
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planes[2].FitThroughPoint( v1 );
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planes[3].SetNormal( v2 - v1 );
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planes[3].Normalize();
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planes[3].FitThroughPoint( v2 );
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}
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/*
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============
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idLedge::AddPoint
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============
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*/
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void idLedge::AddPoint( const idVec3 &v ) {
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if ( planes[2].Distance( v ) > 0.0f ) {
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start = v;
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planes[2].FitThroughPoint( start );
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}
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if ( planes[3].Distance( v ) > 0.0f ) {
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end = v;
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planes[3].FitThroughPoint( end );
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}
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}
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/*
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============
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idLedge::CreateBevels
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NOTE: this assumes the gravity is vertical
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============
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*/
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void idLedge::CreateBevels( const idVec3 &gravityDir ) {
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int i, j;
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idBounds bounds;
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idVec3 size, normal;
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bounds.Clear();
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bounds.AddPoint( start );
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bounds.AddPoint( end );
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size = bounds[1] - bounds[0];
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// plane through ledge
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planes[0].SetNormal( (start - end).Cross( gravityDir ) );
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planes[0].Normalize();
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planes[0].FitThroughPoint( start );
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// axial bevels at start and end point
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i = size[1] > size[0];
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normal = vec3_origin;
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normal[i] = 1.0f;
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j = end[i] > start[i];
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planes[1+j].SetNormal( normal );
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planes[1+!j].SetNormal( -normal );
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planes[1].FitThroughPoint( start );
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planes[2].FitThroughPoint( end );
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numExpandedPlanes = 3;
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// if additional bevels are required
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if ( idMath::Fabs( size[!i] ) > 0.01f ) {
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normal = vec3_origin;
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normal[!i] = 1.0f;
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j = end[!i] > start[!i];
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planes[3+j].SetNormal( normal );
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planes[3+!j].SetNormal( -normal );
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planes[3].FitThroughPoint( start );
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planes[4].FitThroughPoint( end );
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numExpandedPlanes = 5;
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}
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// opposite of first
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planes[numExpandedPlanes+0] = -planes[0];
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// number of planes used for splitting
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numSplitPlanes = numExpandedPlanes + 1;
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// top plane
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planes[numSplitPlanes+0].SetNormal( (start - end).Cross( planes[0].Normal() ) );
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planes[numSplitPlanes+0].Normalize();
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planes[numSplitPlanes+0].FitThroughPoint( start );
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// bottom plane
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planes[numSplitPlanes+1] = -planes[numSplitPlanes+0];
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// total number of planes
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numPlanes = numSplitPlanes + 2;
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}
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/*
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============
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idLedge::Expand
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============
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*/
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void idLedge::Expand( const idBounds &bounds, float maxStepHeight ) {
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int i, j;
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idVec3 v;
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for ( i = 0; i < numExpandedPlanes; i++ ) {
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for ( j = 0; j < 3; j++ ) {
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if ( planes[i].Normal()[j] > 0.0f ) {
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v[j] = bounds[0][j];
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}
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else {
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v[j] = bounds[1][j];
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}
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}
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planes[i].SetDist( planes[i].Dist() + v * -planes[i].Normal() );
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}
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planes[numSplitPlanes+0].SetDist( planes[numSplitPlanes+0].Dist() + maxStepHeight );
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planes[numSplitPlanes+1].SetDist( planes[numSplitPlanes+1].Dist() + 1.0f );
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}
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/*
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============
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idLedge::ChopWinding
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============
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*/
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idWinding *idLedge::ChopWinding( const idWinding *winding ) const {
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int i;
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idWinding *w;
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w = winding->Copy();
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for ( i = 0; i < numPlanes && w; i++ ) {
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w = w->Clip( -planes[i], ON_EPSILON, true );
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}
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return w;
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}
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/*
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============
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idLedge::PointBetweenBounds
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============
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*/
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bool idLedge::PointBetweenBounds( const idVec3 &v ) const {
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return ( planes[2].Distance( v ) < LEDGE_EPSILON ) && ( planes[3].Distance( v ) < LEDGE_EPSILON );
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}
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//===============================================================
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//
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// idAASBuild
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//
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//===============================================================
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/*
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============
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idAASBuild::LedgeSubdivFlood_r
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============
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*/
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void idAASBuild::LedgeSubdivFlood_r( idBrushBSPNode *node, const idLedge *ledge ) {
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int s1, i;
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idBrushBSPPortal *p1;
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idWinding *w;
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idList<idBrushBSPNode *> nodeList;
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if ( node->GetFlags() & NODE_VISITED ) {
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return;
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}
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// if this is not already a ledge area
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if ( !( node->GetFlags() & AREA_LEDGE ) ) {
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for ( p1 = node->GetPortals(); p1; p1 = p1->Next(s1) ) {
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s1 = (p1->GetNode(1) == node);
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if ( !(p1->GetFlags() & FACE_FLOOR) ) {
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continue;
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}
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// split the area if some part of the floor portal is inside the expanded ledge
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w = ledge->ChopWinding( p1->GetWinding() );
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if ( !w ) {
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continue;
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}
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delete w;
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for ( i = 0; i < ledge->numSplitPlanes; i++ ) {
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if ( node->PlaneSide( ledge->planes[i], 0.1f ) != SIDE_CROSS ) {
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continue;
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}
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if ( !node->Split( ledge->planes[i], -1 ) ) {
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continue;
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}
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numLedgeSubdivisions++;
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DisplayRealTimeString( "\r%6d", numLedgeSubdivisions );
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node->GetChild(0)->SetFlag( NODE_VISITED );
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LedgeSubdivFlood_r( node->GetChild(1), ledge );
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return;
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}
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node->SetFlag( AREA_LEDGE );
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break;
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}
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}
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node->SetFlag( NODE_VISITED );
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// get all nodes we might need to flood into
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for ( p1 = node->GetPortals(); p1; p1 = p1->Next(s1) ) {
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s1 = (p1->GetNode(1) == node);
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if ( p1->GetNode( !s1 )->GetContents() & AREACONTENTS_SOLID ) {
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continue;
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}
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// flood through this portal if the portal is partly inside the expanded ledge
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w = ledge->ChopWinding( p1->GetWinding() );
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if ( !w ) {
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continue;
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}
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delete w;
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// add to list, cannot flood directly cause portals might be split on the way
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nodeList.Append( p1->GetNode( !s1 ) );
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}
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// flood into other nodes
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for ( i = 0; i < nodeList.Num(); i++ ) {
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LedgeSubdivLeafNodes_r( nodeList[i], ledge );
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}
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}
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/*
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============
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idAASBuild::LedgeSubdivLeafNodes_r
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The node the ledge was originally part of might be split by other ledges.
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Here we recurse down the tree from the original node to find all the new leaf nodes the ledge might be part of.
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============
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*/
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void idAASBuild::LedgeSubdivLeafNodes_r( idBrushBSPNode *node, const idLedge *ledge ) {
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if ( !node ) {
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return;
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}
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if ( !node->GetChild(0) && !node->GetChild(1) ) {
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LedgeSubdivFlood_r( node, ledge );
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return;
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}
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LedgeSubdivLeafNodes_r( node->GetChild(0), ledge );
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LedgeSubdivLeafNodes_r( node->GetChild(1), ledge );
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}
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/*
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============
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idAASBuild::LedgeSubdiv
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============
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*/
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void idAASBuild::LedgeSubdiv( idBrushBSPNode *root ) {
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int i, j;
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idBrush *brush;
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idList<idBrushSide *> sideList;
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// create ledge bevels and expand ledges
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for ( i = 0; i < ledgeList.Num(); i++ ) {
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ledgeList[i].CreateBevels( aasSettings->gravityDir );
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ledgeList[i].Expand( aasSettings->boundingBoxes[0], aasSettings->maxStepHeight );
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// if we should write out a ledge map
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if ( ledgeMap ) {
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sideList.SetNum( 0 );
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for ( j = 0; j < ledgeList[i].numPlanes; j++ ) {
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sideList.Append( new idBrushSide( ledgeList[i].planes[j], -1 ) );
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}
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brush = new idBrush();
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brush->FromSides( sideList );
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ledgeMap->WriteBrush( brush );
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delete brush;
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}
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// flood tree from the ledge node and subdivide areas with the ledge
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LedgeSubdivLeafNodes_r( ledgeList[i].node, &ledgeList[i] );
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// remove the node visited flags
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ledgeList[i].node->RemoveFlagRecurseFlood( NODE_VISITED );
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}
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}
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/*
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============
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idAASBuild::IsLedgeSide_r
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============
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*/
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bool idAASBuild::IsLedgeSide_r( idBrushBSPNode *node, idFixedWinding *w, const idPlane &plane, const idVec3 &normal, const idVec3 &origin, const float radius ) {
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int res, i;
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idFixedWinding back;
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float dist;
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if ( !node ) {
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return false;
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}
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while ( node->GetChild(0) && node->GetChild(1) ) {
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dist = node->GetPlane().Distance( origin );
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if ( dist > radius ) {
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res = SIDE_FRONT;
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}
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else if ( dist < -radius ) {
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res = SIDE_BACK;
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}
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else {
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res = w->Split( &back, node->GetPlane(), LEDGE_EPSILON );
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}
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if ( res == SIDE_FRONT ) {
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node = node->GetChild(0);
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}
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else if ( res == SIDE_BACK ) {
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node = node->GetChild(1);
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}
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else if ( res == SIDE_ON ) {
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// continue with the side the winding faces
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if ( node->GetPlane().Normal() * normal > 0.0f ) {
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node = node->GetChild(0);
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}
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else {
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node = node->GetChild(1);
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}
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}
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else {
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if ( IsLedgeSide_r( node->GetChild(1), &back, plane, normal, origin, radius ) ) {
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return true;
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}
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node = node->GetChild(0);
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}
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}
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if ( node->GetContents() & AREACONTENTS_SOLID ) {
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return false;
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}
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for ( i = 0; i < w->GetNumPoints(); i++ ) {
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if ( plane.Distance( (*w)[i].ToVec3() ) > 0.0f ) {
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return true;
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}
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}
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return false;
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}
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/*
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============
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idAASBuild::AddLedge
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============
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*/
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void idAASBuild::AddLedge( const idVec3 &v1, const idVec3 &v2, idBrushBSPNode *node ) {
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int i, j, merged;
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// first try to merge the ledge with existing ledges
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merged = -1;
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for ( i = 0; i < ledgeList.Num(); i++ ) {
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for ( j = 0; j < 2; j++ ) {
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if ( idMath::Fabs( ledgeList[i].planes[j].Distance( v1 ) ) > LEDGE_EPSILON ) {
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break;
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}
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if ( idMath::Fabs( ledgeList[i].planes[j].Distance( v2 ) ) > LEDGE_EPSILON ) {
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break;
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}
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}
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if ( j < 2 ) {
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continue;
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}
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if ( !ledgeList[i].PointBetweenBounds( v1 ) &&
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!ledgeList[i].PointBetweenBounds( v2 ) ) {
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continue;
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}
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if ( merged == -1 ) {
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ledgeList[i].AddPoint( v1 );
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ledgeList[i].AddPoint( v2 );
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merged = i;
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}
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else {
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ledgeList[merged].AddPoint( ledgeList[i].start );
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ledgeList[merged].AddPoint( ledgeList[i].end );
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ledgeList.RemoveIndex(i);
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break;
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}
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}
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// if the ledge could not be merged
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if ( merged == -1 ) {
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ledgeList.Append( idLedge( v1, v2, aasSettings->gravityDir, node ) );
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}
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}
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/*
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============
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idAASBuild::FindLeafNodeLedges
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============
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*/
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void idAASBuild::FindLeafNodeLedges( idBrushBSPNode *root, idBrushBSPNode *node ) {
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int s1, i;
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idBrushBSPPortal *p1;
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idWinding *w;
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idVec3 v1, v2, normal, origin;
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idFixedWinding winding;
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idBounds bounds;
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idPlane plane;
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float radius;
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for ( p1 = node->GetPortals(); p1; p1 = p1->Next(s1) ) {
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s1 = (p1->GetNode(1) == node);
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if ( !(p1->GetFlags() & FACE_FLOOR) ) {
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continue;
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}
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if ( s1 ) {
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plane = p1->GetPlane();
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w = p1->GetWinding()->Reverse();
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}
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else {
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plane = -p1->GetPlane();
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w = p1->GetWinding();
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}
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for ( i = 0; i < w->GetNumPoints(); i++ ) {
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v1 = (*w)[i].ToVec3();
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v2 = (*w)[(i+1)%w->GetNumPoints()].ToVec3();
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normal = (v2 - v1).Cross( aasSettings->gravityDir );
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if ( normal.Normalize() < 0.5f ) {
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continue;
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}
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winding.Clear();
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winding += v1 + normal * LEDGE_EPSILON * 0.5f;
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winding += v2 + normal * LEDGE_EPSILON * 0.5f;
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winding += winding[1].ToVec3() + ( aasSettings->maxStepHeight + 1.0f ) * aasSettings->gravityDir;
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winding += winding[0].ToVec3() + ( aasSettings->maxStepHeight + 1.0f ) * aasSettings->gravityDir;
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winding.GetBounds( bounds );
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origin = (bounds[1] - bounds[0]) * 0.5f;
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radius = origin.Length() + LEDGE_EPSILON;
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origin = bounds[0] + origin;
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plane.FitThroughPoint( v1 + aasSettings->maxStepHeight * aasSettings->gravityDir );
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if ( !IsLedgeSide_r( root, &winding, plane, normal, origin, radius ) ) {
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continue;
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}
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AddLedge( v1, v2, node );
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}
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if ( w != p1->GetWinding() ) {
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delete w;
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}
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}
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}
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/*
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============
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idAASBuild::FindLedges_r
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============
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*/
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void idAASBuild::FindLedges_r( idBrushBSPNode *root, idBrushBSPNode *node ) {
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if ( !node ) {
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return;
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}
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if ( node->GetContents() & AREACONTENTS_SOLID ) {
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return;
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}
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if ( !node->GetChild(0) && !node->GetChild(1) ) {
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if ( node->GetFlags() & NODE_VISITED ) {
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return;
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}
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FindLeafNodeLedges( root, node );
|
|
node->SetFlag( NODE_VISITED );
|
|
return;
|
|
}
|
|
|
|
FindLedges_r( root, node->GetChild(0) );
|
|
FindLedges_r( root, node->GetChild(1) );
|
|
}
|
|
|
|
/*
|
|
============
|
|
idAASBuild::WriteLedgeMap
|
|
============
|
|
*/
|
|
void idAASBuild::WriteLedgeMap( const idStr &fileName, const idStr &ext ) {
|
|
ledgeMap = new idBrushMap( fileName, ext );
|
|
ledgeMap->SetTexture( "textures/base_trim/bluetex4q_ed" );
|
|
}
|
|
|
|
/*
|
|
============
|
|
idAASBuild::LedgeSubdivision
|
|
|
|
NOTE: this assumes the bounding box is higher than the maximum step height
|
|
only ledges with vertical sides are considered
|
|
============
|
|
*/
|
|
void idAASBuild::LedgeSubdivision( idBrushBSP &bsp ) {
|
|
numLedgeSubdivisions = 0;
|
|
ledgeList.Clear();
|
|
|
|
common->Printf( "[Ledge Subdivision]\n" );
|
|
|
|
bsp.GetRootNode()->RemoveFlagRecurse( NODE_VISITED );
|
|
FindLedges_r( bsp.GetRootNode(), bsp.GetRootNode() );
|
|
bsp.GetRootNode()->RemoveFlagRecurse( NODE_VISITED );
|
|
|
|
common->Printf( "\r%6d ledges\n", ledgeList.Num() );
|
|
|
|
LedgeSubdiv( bsp.GetRootNode() );
|
|
|
|
common->Printf( "\r%6d subdivisions\n", numLedgeSubdivisions );
|
|
}
|