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716 lines
19 KiB
C++
716 lines
19 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 "AAS_local.h"
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#define SUBSAMPLE_WALK_PATH 1
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#define SUBSAMPLE_FLY_PATH 0
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const int maxWalkPathIterations = 10;
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const float maxWalkPathDistance = 500.0f;
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const float walkPathSampleDistance = 8.0f;
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const int maxFlyPathIterations = 10;
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const float maxFlyPathDistance = 500.0f;
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const float flyPathSampleDistance = 8.0f;
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/*
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============
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idAASLocal::EdgeSplitPoint
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calculates split point of the edge with the plane
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returns true if the split point is between the edge vertices
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============
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*/
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bool idAASLocal::EdgeSplitPoint( idVec3 &split, int edgeNum, const idPlane &plane ) const {
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const aasEdge_t *edge;
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idVec3 v1, v2;
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float d1, d2;
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edge = &file->GetEdge( edgeNum );
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v1 = file->GetVertex( edge->vertexNum[0] );
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v2 = file->GetVertex( edge->vertexNum[1] );
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d1 = v1 * plane.Normal() - plane.Dist();
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d2 = v2 * plane.Normal() - plane.Dist();
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//if ( (d1 < CM_CLIP_EPSILON && d2 < CM_CLIP_EPSILON) || (d1 > -CM_CLIP_EPSILON && d2 > -CM_CLIP_EPSILON) ) {
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if ( FLOATSIGNBITSET( d1 ) == FLOATSIGNBITSET( d2 ) ) {
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return false;
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}
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split = v1 + (d1 / (d1 - d2)) * (v2 - v1);
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return true;
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}
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/*
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============
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idAASLocal::FloorEdgeSplitPoint
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calculates either the closest or furthest point on the floor of the area which also lies on the pathPlane
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the point has to be on the front side of the frontPlane to be valid
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============
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*/
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bool idAASLocal::FloorEdgeSplitPoint( idVec3 &bestSplit, int areaNum, const idPlane &pathPlane, const idPlane &frontPlane, bool closest ) const {
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int i, j, faceNum, edgeNum;
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const aasArea_t *area;
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const aasFace_t *face;
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idVec3 split;
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float dist, bestDist;
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if ( closest ) {
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bestDist = maxWalkPathDistance;
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} else {
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bestDist = -0.1f;
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}
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area = &file->GetArea( areaNum );
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for ( i = 0; i < area->numFaces; i++ ) {
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faceNum = file->GetFaceIndex( area->firstFace + i );
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face = &file->GetFace( abs(faceNum) );
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if ( !(face->flags & FACE_FLOOR ) ) {
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continue;
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}
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for ( j = 0; j < face->numEdges; j++ ) {
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edgeNum = file->GetEdgeIndex( face->firstEdge + j );
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if ( !EdgeSplitPoint( split, abs( edgeNum ), pathPlane ) ) {
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continue;
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}
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dist = frontPlane.Distance( split );
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if ( closest ) {
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if ( dist >= -0.1f && dist < bestDist ) {
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bestDist = dist;
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bestSplit = split;
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}
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} else {
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if ( dist > bestDist ) {
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bestDist = dist;
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bestSplit = split;
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}
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}
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}
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}
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if ( closest ) {
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return ( bestDist < maxWalkPathDistance );
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} else {
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return ( bestDist > -0.1f );
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}
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}
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/*
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============
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idAASLocal::WalkPathValid
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returns true if one can walk in a straight line between origin and goalOrigin
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============
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*/
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bool idAASLocal::WalkPathValid( int areaNum, const idVec3 &origin, int goalAreaNum, const idVec3 &goalOrigin, int travelFlags, idVec3 &endPos, int &endAreaNum ) const {
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int curAreaNum, lastAreaNum, lastAreas[4], lastAreaIndex;
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idPlane pathPlane, frontPlane, farPlane;
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idReachability *reach;
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const aasArea_t *area;
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idVec3 p, dir;
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if ( file == NULL ) {
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endPos = goalOrigin;
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endAreaNum = 0;
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return true;
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}
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lastAreas[0] = lastAreas[1] = lastAreas[2] = lastAreas[3] = areaNum;
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lastAreaIndex = 0;
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pathPlane.SetNormal( (goalOrigin - origin).Cross( file->GetSettings().gravityDir ) );
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pathPlane.Normalize();
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pathPlane.FitThroughPoint( origin );
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frontPlane.SetNormal( goalOrigin - origin );
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frontPlane.Normalize();
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frontPlane.FitThroughPoint( origin );
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farPlane.SetNormal( frontPlane.Normal() );
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farPlane.FitThroughPoint( goalOrigin );
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curAreaNum = areaNum;
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lastAreaNum = curAreaNum;
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while ( 1 ) {
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// find the furthest floor face split point on the path
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if ( !FloorEdgeSplitPoint( endPos, curAreaNum, pathPlane, frontPlane, false ) ) {
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endPos = origin;
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}
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// if we found a point near or further than the goal we're done
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if ( farPlane.Distance( endPos ) > -0.5f ) {
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break;
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}
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// if we reached the goal area we're done
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if ( curAreaNum == goalAreaNum ) {
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break;
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}
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frontPlane.SetDist( frontPlane.Normal() * endPos );
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area = &file->GetArea( curAreaNum );
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for ( reach = area->reach; reach; reach = reach->next ) {
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if ( reach->travelType != TFL_WALK ) {
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continue;
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}
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// if the reachability goes back to a previous area
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if ( reach->toAreaNum == lastAreas[0] || reach->toAreaNum == lastAreas[1] ||
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reach->toAreaNum == lastAreas[2] || reach->toAreaNum == lastAreas[3] ) {
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continue;
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}
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// if undesired travel flags are required to travel through the area
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if ( file->GetArea( reach->toAreaNum ).travelFlags & ~travelFlags ) {
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continue;
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}
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// don't optimize through an area near a ledge
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if ( file->GetArea( reach->toAreaNum ).flags & AREA_LEDGE ) {
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continue;
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}
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// find the closest floor face split point on the path
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if ( !FloorEdgeSplitPoint( p, reach->toAreaNum, pathPlane, frontPlane, true ) ) {
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continue;
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}
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// direction parallel to gravity
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dir = ( file->GetSettings().gravityDir * endPos * file->GetSettings().gravityDir ) -
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( file->GetSettings().gravityDir * p * file->GetSettings().gravityDir );
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if ( dir.LengthSqr() > Square( file->GetSettings().maxStepHeight ) ) {
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continue;
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}
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// direction orthogonal to gravity
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dir = endPos - p - dir;
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if ( dir.LengthSqr() > Square( 0.2f ) ) {
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continue;
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}
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break;
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}
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if ( !reach ) {
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return false;
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}
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lastAreas[lastAreaIndex] = curAreaNum;
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lastAreaIndex = ( lastAreaIndex + 1 ) & 3;
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curAreaNum = reach->toAreaNum;
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}
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endAreaNum = curAreaNum;
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return true;
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}
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/*
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============
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idAASLocal::SubSampleWalkPath
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============
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*/
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idVec3 idAASLocal::SubSampleWalkPath( int areaNum, const idVec3 &origin, const idVec3 &start, const idVec3 &end, int travelFlags, int &endAreaNum ) const {
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int i, numSamples, curAreaNum;
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idVec3 dir, point, nextPoint, endPos;
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dir = end - start;
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numSamples = (int) (dir.Length() / walkPathSampleDistance) + 1;
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point = start;
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for ( i = 1; i < numSamples; i++ ) {
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nextPoint = start + dir * ((float) i / numSamples);
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if ( (point - nextPoint).LengthSqr() > Square( maxWalkPathDistance ) ) {
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return point;
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}
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if ( !idAASLocal::WalkPathValid( areaNum, origin, 0, nextPoint, travelFlags, endPos, curAreaNum ) ) {
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return point;
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}
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point = nextPoint;
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endAreaNum = curAreaNum;
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}
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return point;
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}
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/*
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============
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idAASLocal::WalkPathToGoal
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FIXME: don't stop optimizing on first failure ?
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============
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*/
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bool idAASLocal::WalkPathToGoal( aasPath_t &path, int areaNum, const idVec3 &origin, int goalAreaNum, const idVec3 &goalOrigin, int travelFlags ) const {
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int i, travelTime, curAreaNum, lastAreas[4], lastAreaIndex, endAreaNum;
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idReachability *reach;
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idVec3 endPos;
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path.type = PATHTYPE_WALK;
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path.moveGoal = origin;
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path.moveAreaNum = areaNum;
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path.secondaryGoal = origin;
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path.reachability = NULL;
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if ( file == NULL || areaNum == goalAreaNum ) {
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path.moveGoal = goalOrigin;
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return true;
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}
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lastAreas[0] = lastAreas[1] = lastAreas[2] = lastAreas[3] = areaNum;
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lastAreaIndex = 0;
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curAreaNum = areaNum;
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for ( i = 0; i < maxWalkPathIterations; i++ ) {
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if ( !idAASLocal::RouteToGoalArea( curAreaNum, path.moveGoal, goalAreaNum, travelFlags, travelTime, &reach ) ) {
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break;
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}
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if ( !reach ) {
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return false;
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}
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// no need to check through the first area
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if ( areaNum != curAreaNum ) {
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// only optimize a limited distance ahead
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if ( (reach->start - origin).LengthSqr() > Square( maxWalkPathDistance ) ) {
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#if SUBSAMPLE_WALK_PATH
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path.moveGoal = SubSampleWalkPath( areaNum, origin, path.moveGoal, reach->start, travelFlags, path.moveAreaNum );
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#endif
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return true;
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}
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if ( !idAASLocal::WalkPathValid( areaNum, origin, 0, reach->start, travelFlags, endPos, endAreaNum ) ) {
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#if SUBSAMPLE_WALK_PATH
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path.moveGoal = SubSampleWalkPath( areaNum, origin, path.moveGoal, reach->start, travelFlags, path.moveAreaNum );
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#endif
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return true;
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}
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}
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path.moveGoal = reach->start;
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path.moveAreaNum = curAreaNum;
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if ( reach->travelType != TFL_WALK ) {
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break;
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}
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if ( !idAASLocal::WalkPathValid( areaNum, origin, 0, reach->end, travelFlags, endPos, endAreaNum ) ) {
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return true;
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}
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path.moveGoal = reach->end;
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path.moveAreaNum = reach->toAreaNum;
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if ( reach->toAreaNum == goalAreaNum ) {
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if ( !idAASLocal::WalkPathValid( areaNum, origin, 0, goalOrigin, travelFlags, endPos, endAreaNum ) ) {
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#if SUBSAMPLE_WALK_PATH
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path.moveGoal = SubSampleWalkPath( areaNum, origin, path.moveGoal, goalOrigin, travelFlags, path.moveAreaNum );
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#endif
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return true;
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}
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path.moveGoal = goalOrigin;
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path.moveAreaNum = goalAreaNum;
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return true;
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}
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lastAreas[lastAreaIndex] = curAreaNum;
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lastAreaIndex = ( lastAreaIndex + 1 ) & 3;
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curAreaNum = reach->toAreaNum;
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if ( curAreaNum == lastAreas[0] || curAreaNum == lastAreas[1] ||
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curAreaNum == lastAreas[2] || curAreaNum == lastAreas[3] ) {
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common->Warning( "idAASLocal::WalkPathToGoal: local routing minimum going from area %d to area %d", areaNum, goalAreaNum );
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break;
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}
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}
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if ( !reach ) {
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return false;
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}
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switch( reach->travelType ) {
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case TFL_WALKOFFLEDGE:
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path.type = PATHTYPE_WALKOFFLEDGE;
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path.secondaryGoal = reach->end;
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path.reachability = reach;
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break;
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case TFL_BARRIERJUMP:
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path.type |= PATHTYPE_BARRIERJUMP;
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path.secondaryGoal = reach->end;
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path.reachability = reach;
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break;
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case TFL_JUMP:
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path.type |= PATHTYPE_JUMP;
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path.secondaryGoal = reach->end;
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path.reachability = reach;
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break;
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default:
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break;
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}
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return true;
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}
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/*
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============
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idAASLocal::FlyPathValid
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returns true if one can fly in a straight line between origin and goalOrigin
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============
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*/
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bool idAASLocal::FlyPathValid( int areaNum, const idVec3 &origin, int goalAreaNum, const idVec3 &goalOrigin, int travelFlags, idVec3 &endPos, int &endAreaNum ) const {
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aasTrace_t trace;
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if ( file == NULL ) {
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endPos = goalOrigin;
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endAreaNum = 0;
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return true;
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}
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file->Trace( trace, origin, goalOrigin );
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endPos = trace.endpos;
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endAreaNum = trace.lastAreaNum;
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if ( trace.fraction >= 1.0f ) {
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return true;
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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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idAASLocal::SubSampleFlyPath
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============
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*/
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idVec3 idAASLocal::SubSampleFlyPath( int areaNum, const idVec3 &origin, const idVec3 &start, const idVec3 &end, int travelFlags, int &endAreaNum ) const {
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int i, numSamples, curAreaNum;
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idVec3 dir, point, nextPoint, endPos;
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dir = end - start;
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numSamples = (int) (dir.Length() / flyPathSampleDistance) + 1;
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point = start;
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for ( i = 1; i < numSamples; i++ ) {
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nextPoint = start + dir * ((float) i / numSamples);
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if ( (point - nextPoint).LengthSqr() > Square( maxFlyPathDistance ) ) {
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return point;
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}
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if ( !idAASLocal::FlyPathValid( areaNum, origin, 0, nextPoint, travelFlags, endPos, curAreaNum ) ) {
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return point;
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}
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point = nextPoint;
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endAreaNum = curAreaNum;
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}
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return point;
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}
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/*
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============
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idAASLocal::FlyPathToGoal
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FIXME: don't stop optimizing on first failure ?
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============
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*/
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bool idAASLocal::FlyPathToGoal( aasPath_t &path, int areaNum, const idVec3 &origin, int goalAreaNum, const idVec3 &goalOrigin, int travelFlags ) const {
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int i, travelTime, curAreaNum, lastAreas[4], lastAreaIndex, endAreaNum;
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idReachability *reach;
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idVec3 endPos;
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path.type = PATHTYPE_WALK;
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path.moveGoal = origin;
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path.moveAreaNum = areaNum;
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path.secondaryGoal = origin;
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path.reachability = NULL;
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if ( file == NULL || areaNum == goalAreaNum ) {
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path.moveGoal = goalOrigin;
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return true;
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}
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lastAreas[0] = lastAreas[1] = lastAreas[2] = lastAreas[3] = areaNum;
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lastAreaIndex = 0;
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curAreaNum = areaNum;
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for ( i = 0; i < maxFlyPathIterations; i++ ) {
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if ( !idAASLocal::RouteToGoalArea( curAreaNum, path.moveGoal, goalAreaNum, travelFlags, travelTime, &reach ) ) {
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break;
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}
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if ( !reach ) {
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return false;
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}
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// no need to check through the first area
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if ( areaNum != curAreaNum ) {
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if ( (reach->start - origin).LengthSqr() > Square( maxFlyPathDistance ) ) {
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#if SUBSAMPLE_FLY_PATH
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path.moveGoal = SubSampleFlyPath( areaNum, origin, path.moveGoal, reach->start, travelFlags, path.moveAreaNum );
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#endif
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return true;
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}
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if ( !idAASLocal::FlyPathValid( areaNum, origin, 0, reach->start, travelFlags, endPos, endAreaNum ) ) {
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#if SUBSAMPLE_FLY_PATH
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path.moveGoal = SubSampleFlyPath( areaNum, origin, path.moveGoal, reach->start, travelFlags, path.moveAreaNum );
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#endif
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return true;
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}
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}
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path.moveGoal = reach->start;
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path.moveAreaNum = curAreaNum;
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if ( !idAASLocal::FlyPathValid( areaNum, origin, 0, reach->end, travelFlags, endPos, endAreaNum ) ) {
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return true;
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}
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path.moveGoal = reach->end;
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path.moveAreaNum = reach->toAreaNum;
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if ( reach->toAreaNum == goalAreaNum ) {
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if ( !idAASLocal::FlyPathValid( areaNum, origin, 0, goalOrigin, travelFlags, endPos, endAreaNum ) ) {
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#if SUBSAMPLE_FLY_PATH
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path.moveGoal = SubSampleFlyPath( areaNum, origin, path.moveGoal, goalOrigin, travelFlags, path.moveAreaNum );
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#endif
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return true;
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}
|
|
path.moveGoal = goalOrigin;
|
|
path.moveAreaNum = goalAreaNum;
|
|
return true;
|
|
}
|
|
|
|
lastAreas[lastAreaIndex] = curAreaNum;
|
|
lastAreaIndex = ( lastAreaIndex + 1 ) & 3;
|
|
|
|
curAreaNum = reach->toAreaNum;
|
|
|
|
if ( curAreaNum == lastAreas[0] || curAreaNum == lastAreas[1] ||
|
|
curAreaNum == lastAreas[2] || curAreaNum == lastAreas[3] ) {
|
|
common->Warning( "idAASLocal::FlyPathToGoal: local routing minimum going from area %d to area %d", areaNum, goalAreaNum );
|
|
break;
|
|
}
|
|
}
|
|
|
|
if ( !reach ) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
typedef struct wallEdge_s {
|
|
int edgeNum;
|
|
int verts[2];
|
|
struct wallEdge_s * next;
|
|
} wallEdge_t;
|
|
|
|
/*
|
|
============
|
|
idAASLocal::SortWallEdges
|
|
============
|
|
*/
|
|
void idAASLocal::SortWallEdges( int *edges, int numEdges ) const {
|
|
int i, j, k, numSequences;
|
|
wallEdge_t **sequenceFirst, **sequenceLast, *wallEdges, *wallEdge;
|
|
|
|
wallEdges = (wallEdge_t *) _alloca16( numEdges * sizeof( wallEdge_t ) );
|
|
sequenceFirst = (wallEdge_t **)_alloca16( numEdges * sizeof( wallEdge_t * ) );
|
|
sequenceLast = (wallEdge_t **)_alloca16( numEdges * sizeof( wallEdge_t * ) );
|
|
|
|
for ( i = 0; i < numEdges; i++ ) {
|
|
wallEdges[i].edgeNum = edges[i];
|
|
GetEdgeVertexNumbers( edges[i], wallEdges[i].verts );
|
|
wallEdges[i].next = NULL;
|
|
sequenceFirst[i] = &wallEdges[i];
|
|
sequenceLast[i] = &wallEdges[i];
|
|
}
|
|
numSequences = numEdges;
|
|
|
|
for ( i = 0; i < numSequences; i++ ) {
|
|
for ( j = i+1; j < numSequences; j++ ) {
|
|
if ( sequenceFirst[i]->verts[0] == sequenceLast[j]->verts[1] ) {
|
|
sequenceLast[j]->next = sequenceFirst[i];
|
|
sequenceFirst[i] = sequenceFirst[j];
|
|
break;
|
|
}
|
|
if ( sequenceLast[i]->verts[1] == sequenceFirst[j]->verts[0] ) {
|
|
sequenceLast[i]->next = sequenceFirst[j];
|
|
break;
|
|
}
|
|
}
|
|
if ( j < numSequences ) {
|
|
numSequences--;
|
|
for ( k = j; k < numSequences; k++ ) {
|
|
sequenceFirst[k] = sequenceFirst[k+1];
|
|
sequenceLast[k] = sequenceLast[k+1];
|
|
}
|
|
i = -1;
|
|
}
|
|
}
|
|
|
|
k = 0;
|
|
for ( i = 0; i < numSequences; i++ ) {
|
|
for ( wallEdge = sequenceFirst[i]; wallEdge; wallEdge = wallEdge->next ) {
|
|
edges[k++] = wallEdge->edgeNum;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
============
|
|
idAASLocal::GetWallEdges
|
|
============
|
|
*/
|
|
int idAASLocal::GetWallEdges( int areaNum, const idBounds &bounds, int travelFlags, int *edges, int maxEdges ) const {
|
|
int i, j, k, l, face1Num, face2Num, edge1Num, edge2Num, numEdges, absEdge1Num;
|
|
int *areaQueue, curArea, queueStart, queueEnd;
|
|
byte *areasVisited;
|
|
const aasArea_t *area;
|
|
const aasFace_t *face1, *face2;
|
|
idReachability *reach;
|
|
|
|
if ( !file ) {
|
|
return 0;
|
|
}
|
|
|
|
numEdges = 0;
|
|
|
|
areasVisited = (byte *) _alloca16( file->GetNumAreas() );
|
|
memset( areasVisited, 0, file->GetNumAreas() * sizeof( byte ) );
|
|
areaQueue = (int *) _alloca16( file->GetNumAreas() * sizeof( int ) );
|
|
|
|
queueStart = -1;
|
|
queueEnd = 0;
|
|
areaQueue[0] = areaNum;
|
|
areasVisited[areaNum] = true;
|
|
|
|
for ( curArea = areaNum; queueStart < queueEnd; curArea = areaQueue[++queueStart] ) {
|
|
|
|
area = &file->GetArea( curArea );
|
|
|
|
for ( i = 0; i < area->numFaces; i++ ) {
|
|
face1Num = file->GetFaceIndex( area->firstFace + i );
|
|
face1 = &file->GetFace( abs(face1Num) );
|
|
|
|
if ( !(face1->flags & FACE_FLOOR ) ) {
|
|
continue;
|
|
}
|
|
|
|
for ( j = 0; j < face1->numEdges; j++ ) {
|
|
edge1Num = file->GetEdgeIndex( face1->firstEdge + j );
|
|
absEdge1Num = abs( edge1Num );
|
|
|
|
// test if the edge is shared by another floor face of this area
|
|
for ( k = 0; k < area->numFaces; k++ ) {
|
|
if ( k == i ) {
|
|
continue;
|
|
}
|
|
face2Num = file->GetFaceIndex( area->firstFace + k );
|
|
face2 = &file->GetFace( abs(face2Num) );
|
|
|
|
if ( !(face2->flags & FACE_FLOOR ) ) {
|
|
continue;
|
|
}
|
|
|
|
for ( l = 0; l < face2->numEdges; l++ ) {
|
|
edge2Num = abs( file->GetEdgeIndex( face2->firstEdge + l ) );
|
|
if ( edge2Num == absEdge1Num ) {
|
|
break;
|
|
}
|
|
}
|
|
if ( l < face2->numEdges ) {
|
|
break;
|
|
}
|
|
}
|
|
if ( k < area->numFaces ) {
|
|
continue;
|
|
}
|
|
|
|
// test if the edge is used by a reachability
|
|
for ( reach = area->reach; reach; reach = reach->next ) {
|
|
if ( reach->travelType & travelFlags ) {
|
|
if ( reach->edgeNum == absEdge1Num ) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if ( reach ) {
|
|
continue;
|
|
}
|
|
|
|
// test if the edge is already in the list
|
|
for ( k = 0; k < numEdges; k++ ) {
|
|
if ( edge1Num == edges[k] ) {
|
|
break;
|
|
}
|
|
}
|
|
if ( k < numEdges ) {
|
|
continue;
|
|
}
|
|
|
|
// add the edge to the list
|
|
edges[numEdges++] = edge1Num;
|
|
if ( numEdges >= maxEdges ) {
|
|
return numEdges;
|
|
}
|
|
}
|
|
}
|
|
|
|
// add new areas to the queue
|
|
for ( reach = area->reach; reach; reach = reach->next ) {
|
|
if ( reach->travelType & travelFlags ) {
|
|
// if the area the reachability leads to hasn't been visited yet and the area bounds touch the search bounds
|
|
if ( !areasVisited[reach->toAreaNum] && bounds.IntersectsBounds( file->GetArea( reach->toAreaNum ).bounds ) ) {
|
|
areaQueue[queueEnd++] = reach->toAreaNum;
|
|
areasVisited[reach->toAreaNum] = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return numEdges;
|
|
}
|