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https://github.com/dhewm/dhewm3.git
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736ec20d4d
Don't include the lazy precompiled.h everywhere, only what's required for the compilation unit. platform.h needs to be included instead to provide all essential defines and types. All includes use the relative path to the neo or the game specific root. Move all idlib related includes from idlib/Lib.h to precompiled.h. precompiled.h still exists for the MFC stuff in tools/. Add some missing header guards.
1074 lines
28 KiB
C++
1074 lines
28 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 "sys/platform.h"
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#include "framework/DemoFile.h"
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#include "framework/Session.h"
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#include "renderer/RenderWorld_local.h"
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#include "renderer/tr_local.h"
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/*
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All that is done in these functions is the creation of viewLights
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and viewEntitys for the lightDefs and entityDefs that are visible
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in the portal areas that can be seen from the current viewpoint.
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*/
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// if we hit this many planes, we will just stop cropping the
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// view down, which is still correct, just conservative
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const int MAX_PORTAL_PLANES = 20;
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typedef struct portalStack_s {
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portal_t *p;
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const struct portalStack_s *next;
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idScreenRect rect;
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int numPortalPlanes;
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idPlane portalPlanes[MAX_PORTAL_PLANES+1];
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// positive side is outside the visible frustum
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} portalStack_t;
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//====================================================================
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/*
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===================
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idRenderWorldLocal::ScreenRectForWinding
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===================
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*/
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idScreenRect idRenderWorldLocal::ScreenRectFromWinding( const idWinding *w, viewEntity_t *space ) {
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idScreenRect r;
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int i;
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idVec3 v;
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idVec3 ndc;
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float windowX, windowY;
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r.Clear();
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for ( i = 0 ; i < w->GetNumPoints() ; i++ ) {
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R_LocalPointToGlobal( space->modelMatrix, (*w)[i].ToVec3(), v );
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R_GlobalToNormalizedDeviceCoordinates( v, ndc );
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windowX = 0.5f * ( 1.0f + ndc[0] ) * ( tr.viewDef->viewport.x2 - tr.viewDef->viewport.x1 );
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windowY = 0.5f * ( 1.0f + ndc[1] ) * ( tr.viewDef->viewport.y2 - tr.viewDef->viewport.y1 );
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r.AddPoint( windowX, windowY );
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}
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r.Expand();
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return r;
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}
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/*
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===================
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PortalIsFoggedOut
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===================
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*/
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bool idRenderWorldLocal::PortalIsFoggedOut( const portal_t *p ) {
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idRenderLightLocal *ldef;
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const idWinding *w;
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int i;
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idPlane forward;
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ldef = p->doublePortal->fogLight;
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if ( !ldef ) {
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return false;
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}
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// find the current density of the fog
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const idMaterial *lightShader = ldef->lightShader;
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int size = sizeof( float ) *lightShader->GetNumRegisters();
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float *regs =(float *)_alloca( size );
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lightShader->EvaluateRegisters( regs, ldef->parms.shaderParms, tr.viewDef, ldef->parms.referenceSound );
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const shaderStage_t *stage = lightShader->GetStage(0);
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float alpha = regs[ stage->color.registers[3] ];
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// if they left the default value on, set a fog distance of 500
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float a;
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if ( alpha <= 1.0f ) {
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a = -0.5f / DEFAULT_FOG_DISTANCE;
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} else {
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// otherwise, distance = alpha color
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a = -0.5f / alpha;
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}
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forward[0] = a * tr.viewDef->worldSpace.modelViewMatrix[2];
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forward[1] = a * tr.viewDef->worldSpace.modelViewMatrix[6];
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forward[2] = a * tr.viewDef->worldSpace.modelViewMatrix[10];
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forward[3] = a * tr.viewDef->worldSpace.modelViewMatrix[14];
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w = p->w;
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for ( i = 0 ; i < w->GetNumPoints() ; i++ ) {
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float d;
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d = forward.Distance( (*w)[i].ToVec3() );
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if ( d < 0.5f ) {
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return false; // a point not clipped off
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}
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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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FloodViewThroughArea_r
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===================
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*/
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void idRenderWorldLocal::FloodViewThroughArea_r( const idVec3 origin, int areaNum,
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const struct portalStack_s *ps ) {
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portal_t* p;
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float d;
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portalArea_t * area;
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const portalStack_t *check;
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portalStack_t newStack;
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int i, j;
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idVec3 v1, v2;
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int addPlanes;
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idFixedWinding w; // we won't overflow because MAX_PORTAL_PLANES = 20
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area = &portalAreas[ areaNum ];
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// cull models and lights to the current collection of planes
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AddAreaRefs( areaNum, ps );
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if ( areaScreenRect[areaNum].IsEmpty() ) {
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areaScreenRect[areaNum] = ps->rect;
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} else {
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areaScreenRect[areaNum].Union( ps->rect );
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}
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// go through all the portals
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for ( p = area->portals; p; p = p->next ) {
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// an enclosing door may have sealed the portal off
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if ( p->doublePortal->blockingBits & PS_BLOCK_VIEW ) {
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continue;
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}
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// make sure this portal is facing away from the view
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d = p->plane.Distance( origin );
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if ( d < -0.1f ) {
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continue;
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}
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// make sure the portal isn't in our stack trace,
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// which would cause an infinite loop
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for ( check = ps; check; check = check->next ) {
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if ( check->p == p ) {
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break; // don't recursively enter a stack
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}
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}
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if ( check ) {
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continue; // already in stack
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}
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// if we are very close to the portal surface, don't bother clipping
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// it, which tends to give epsilon problems that make the area vanish
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if ( d < 1.0f ) {
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// go through this portal
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newStack = *ps;
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newStack.p = p;
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newStack.next = ps;
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FloodViewThroughArea_r( origin, p->intoArea, &newStack );
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continue;
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}
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// clip the portal winding to all of the planes
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w = *p->w;
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for ( j = 0; j < ps->numPortalPlanes; j++ ) {
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if ( !w.ClipInPlace( -ps->portalPlanes[j], 0 ) ) {
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break;
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}
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}
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if ( !w.GetNumPoints() ) {
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continue; // portal not visible
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}
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// see if it is fogged out
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if ( PortalIsFoggedOut( p ) ) {
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continue;
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}
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// go through this portal
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newStack.p = p;
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newStack.next = ps;
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// find the screen pixel bounding box of the remaining portal
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// so we can scissor things outside it
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newStack.rect = ScreenRectFromWinding( &w, &tr.identitySpace );
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// slop might have spread it a pixel outside, so trim it back
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newStack.rect.Intersect( ps->rect );
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// generate a set of clipping planes that will further restrict
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// the visible view beyond just the scissor rect
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addPlanes = w.GetNumPoints();
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if ( addPlanes > MAX_PORTAL_PLANES ) {
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addPlanes = MAX_PORTAL_PLANES;
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}
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newStack.numPortalPlanes = 0;
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for ( i = 0; i < addPlanes; i++ ) {
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j = i+1;
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if ( j == w.GetNumPoints() ) {
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j = 0;
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}
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v1 = origin - w[i].ToVec3();
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v2 = origin - w[j].ToVec3();
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newStack.portalPlanes[newStack.numPortalPlanes].Normal().Cross( v2, v1 );
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// if it is degenerate, skip the plane
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if ( newStack.portalPlanes[newStack.numPortalPlanes].Normalize() < 0.01f ) {
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continue;
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}
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newStack.portalPlanes[newStack.numPortalPlanes].FitThroughPoint( origin );
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newStack.numPortalPlanes++;
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}
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// the last stack plane is the portal plane
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newStack.portalPlanes[newStack.numPortalPlanes] = p->plane;
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newStack.numPortalPlanes++;
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FloodViewThroughArea_r( origin, p->intoArea, &newStack );
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}
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}
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/*
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=======================
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FlowViewThroughPortals
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Finds viewLights and viewEntities by flowing from an origin through the visible portals.
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origin point can see into. The planes array defines a volume (positive
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sides facing in) that should contain the origin, such as a view frustum or a point light box.
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Zero planes assumes an unbounded volume.
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=======================
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*/
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void idRenderWorldLocal::FlowViewThroughPortals( const idVec3 origin, int numPlanes, const idPlane *planes ) {
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portalStack_t ps;
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int i;
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ps.next = NULL;
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ps.p = NULL;
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for ( i = 0 ; i < numPlanes ; i++ ) {
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ps.portalPlanes[i] = planes[i];
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}
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ps.numPortalPlanes = numPlanes;
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ps.rect = tr.viewDef->scissor;
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if ( tr.viewDef->areaNum < 0 ){
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for ( i = 0; i < numPortalAreas; i++ ) {
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areaScreenRect[i] = tr.viewDef->scissor;
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}
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// if outside the world, mark everything
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for ( i = 0 ; i < numPortalAreas ; i++ ) {
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AddAreaRefs( i, &ps );
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}
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} else {
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for ( i = 0; i < numPortalAreas; i++ ) {
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areaScreenRect[i].Clear();
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}
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// flood out through portals, setting area viewCount
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FloodViewThroughArea_r( origin, tr.viewDef->areaNum, &ps );
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}
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}
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//==================================================================================================
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/*
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===================
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FloodLightThroughArea_r
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===================
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*/
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void idRenderWorldLocal::FloodLightThroughArea_r( idRenderLightLocal *light, int areaNum,
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const struct portalStack_s *ps ) {
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portal_t* p;
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float d;
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portalArea_t * area;
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const portalStack_t *check, *firstPortalStack = NULL;
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portalStack_t newStack;
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int i, j;
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idVec3 v1, v2;
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int addPlanes;
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idFixedWinding w; // we won't overflow because MAX_PORTAL_PLANES = 20
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area = &portalAreas[ areaNum ];
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// add an areaRef
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AddLightRefToArea( light, area );
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// go through all the portals
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for ( p = area->portals; p; p = p->next ) {
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// make sure this portal is facing away from the view
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d = p->plane.Distance( light->globalLightOrigin );
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if ( d < -0.1f ) {
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continue;
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}
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// make sure the portal isn't in our stack trace,
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// which would cause an infinite loop
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for ( check = ps; check; check = check->next ) {
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firstPortalStack = check;
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if ( check->p == p ) {
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break; // don't recursively enter a stack
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}
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}
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if ( check ) {
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continue; // already in stack
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}
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// if we are very close to the portal surface, don't bother clipping
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// it, which tends to give epsilon problems that make the area vanish
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if ( d < 1.0f ) {
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// go through this portal
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newStack = *ps;
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newStack.p = p;
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newStack.next = ps;
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FloodLightThroughArea_r( light, p->intoArea, &newStack );
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continue;
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}
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// clip the portal winding to all of the planes
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w = *p->w;
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for ( j = 0; j < ps->numPortalPlanes; j++ ) {
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if ( !w.ClipInPlace( -ps->portalPlanes[j], 0 ) ) {
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break;
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}
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}
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if ( !w.GetNumPoints() ) {
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continue; // portal not visible
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}
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// also always clip to the original light planes, because they aren't
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// necessarily extending to infinitiy like a view frustum
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for ( j = 0; j < firstPortalStack->numPortalPlanes; j++ ) {
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if ( !w.ClipInPlace( -firstPortalStack->portalPlanes[j], 0 ) ) {
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break;
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}
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}
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if ( !w.GetNumPoints() ) {
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continue; // portal not visible
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}
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// go through this portal
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newStack.p = p;
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newStack.next = ps;
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// generate a set of clipping planes that will further restrict
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// the visible view beyond just the scissor rect
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addPlanes = w.GetNumPoints();
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if ( addPlanes > MAX_PORTAL_PLANES ) {
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addPlanes = MAX_PORTAL_PLANES;
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}
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newStack.numPortalPlanes = 0;
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for ( i = 0; i < addPlanes; i++ ) {
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j = i+1;
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if ( j == w.GetNumPoints() ) {
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j = 0;
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}
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v1 = light->globalLightOrigin - w[i].ToVec3();
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v2 = light->globalLightOrigin - w[j].ToVec3();
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newStack.portalPlanes[newStack.numPortalPlanes].Normal().Cross( v2, v1 );
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// if it is degenerate, skip the plane
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if ( newStack.portalPlanes[newStack.numPortalPlanes].Normalize() < 0.01f ) {
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continue;
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}
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newStack.portalPlanes[newStack.numPortalPlanes].FitThroughPoint( light->globalLightOrigin );
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newStack.numPortalPlanes++;
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}
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FloodLightThroughArea_r( light, p->intoArea, &newStack );
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}
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}
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/*
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=======================
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FlowLightThroughPortals
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Adds an arearef in each area that the light center flows into.
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This can only be used for shadow casting lights that have a generated
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prelight, because shadows are cast from back side which may not be in visible areas.
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=======================
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*/
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void idRenderWorldLocal::FlowLightThroughPortals( idRenderLightLocal *light ) {
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portalStack_t ps;
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int i;
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// if the light origin areaNum is not in a valid area,
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// the light won't have any area refs
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if ( light->areaNum == -1 ) {
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return;
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}
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memset( &ps, 0, sizeof( ps ) );
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ps.numPortalPlanes = 6;
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for ( i = 0 ; i < 6 ; i++ ) {
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ps.portalPlanes[i] = light->frustum[i];
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}
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FloodLightThroughArea_r( light, light->areaNum, &ps );
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}
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//======================================================================================================
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/*
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===================
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idRenderWorldLocal::FloodFrustumAreas_r
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===================
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*/
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areaNumRef_t *idRenderWorldLocal::FloodFrustumAreas_r( const idFrustum &frustum, const int areaNum, const idBounds &bounds, areaNumRef_t *areas ) {
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portal_t *p;
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portalArea_t *portalArea;
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idBounds newBounds;
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areaNumRef_t *a;
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portalArea = &portalAreas[ areaNum ];
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// go through all the portals
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for ( p = portalArea->portals; p; p = p->next ) {
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// check if we already visited the area the portal leads to
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for ( a = areas; a; a = a->next ) {
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if ( a->areaNum == p->intoArea ) {
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break;
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}
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}
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if ( a ) {
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continue;
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}
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// the frustum origin must be at the front of the portal plane
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if ( p->plane.Side( frustum.GetOrigin(), 0.1f ) == SIDE_BACK ) {
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continue;
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}
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// the frustum must cross the portal plane
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if ( frustum.PlaneSide( p->plane, 0.0f ) != PLANESIDE_CROSS ) {
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continue;
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}
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// get the bounds for the portal winding projected in the frustum
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frustum.ProjectionBounds( *p->w, newBounds );
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newBounds.IntersectSelf( bounds );
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if ( newBounds[0][0] > newBounds[1][0] || newBounds[0][1] > newBounds[1][1] || newBounds[0][2] > newBounds[1][2] ) {
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continue;
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}
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newBounds[1][0] = frustum.GetFarDistance();
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a = areaNumRefAllocator.Alloc();
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a->areaNum = p->intoArea;
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a->next = areas;
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areas = a;
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areas = FloodFrustumAreas_r( frustum, p->intoArea, newBounds, areas );
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}
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return areas;
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}
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/*
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===================
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idRenderWorldLocal::FloodFrustumAreas
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Retrieves all the portal areas the frustum floods into where the frustum starts in the given areas.
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All portals are assumed to be open.
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===================
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*/
|
|
areaNumRef_t *idRenderWorldLocal::FloodFrustumAreas( const idFrustum &frustum, areaNumRef_t *areas ) {
|
|
idBounds bounds;
|
|
areaNumRef_t *a;
|
|
|
|
// bounds that cover the whole frustum
|
|
bounds[0].Set( frustum.GetNearDistance(), -1.0f, -1.0f );
|
|
bounds[1].Set( frustum.GetFarDistance(), 1.0f, 1.0f );
|
|
|
|
for ( a = areas; a; a = a->next ) {
|
|
areas = FloodFrustumAreas_r( frustum, a->areaNum, bounds, areas );
|
|
}
|
|
|
|
return areas;
|
|
}
|
|
|
|
|
|
/*
|
|
=======================================================================
|
|
|
|
R_FindViewLightsAndEntities
|
|
|
|
=======================================================================
|
|
*/
|
|
|
|
/*
|
|
================
|
|
CullEntityByPortals
|
|
|
|
Return true if the entity reference bounds do not intersect the current portal chain.
|
|
================
|
|
*/
|
|
bool idRenderWorldLocal::CullEntityByPortals( const idRenderEntityLocal *entity, const portalStack_t *ps ) {
|
|
|
|
if ( !r_useEntityCulling.GetBool() ) {
|
|
return false;
|
|
}
|
|
|
|
// try to cull the entire thing using the reference bounds.
|
|
// we do not yet do callbacks or dynamic model creation,
|
|
// because we want to do all touching of the model after
|
|
// we have determined all the lights that may effect it,
|
|
// which optimizes cache usage
|
|
if ( R_CullLocalBox( entity->referenceBounds, entity->modelMatrix,
|
|
ps->numPortalPlanes, ps->portalPlanes ) ) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
===================
|
|
AddAreaEntityRefs
|
|
|
|
Any models that are visible through the current portalStack will
|
|
have their scissor
|
|
===================
|
|
*/
|
|
void idRenderWorldLocal::AddAreaEntityRefs( int areaNum, const portalStack_t *ps ) {
|
|
areaReference_t *ref;
|
|
idRenderEntityLocal *entity;
|
|
portalArea_t *area;
|
|
viewEntity_t *vEnt;
|
|
idBounds b;
|
|
|
|
area = &portalAreas[ areaNum ];
|
|
|
|
for ( ref = area->entityRefs.areaNext ; ref != &area->entityRefs ; ref = ref->areaNext ) {
|
|
entity = ref->entity;
|
|
|
|
// debug tool to allow viewing of only one entity at a time
|
|
if ( r_singleEntity.GetInteger() >= 0 && r_singleEntity.GetInteger() != entity->index ) {
|
|
continue;
|
|
}
|
|
|
|
// remove decals that are completely faded away
|
|
R_FreeEntityDefFadedDecals( entity, tr.viewDef->renderView.time );
|
|
|
|
// check for completely suppressing the model
|
|
if ( !r_skipSuppress.GetBool() ) {
|
|
if ( entity->parms.suppressSurfaceInViewID
|
|
&& entity->parms.suppressSurfaceInViewID == tr.viewDef->renderView.viewID ) {
|
|
continue;
|
|
}
|
|
if ( entity->parms.allowSurfaceInViewID
|
|
&& entity->parms.allowSurfaceInViewID != tr.viewDef->renderView.viewID ) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// cull reference bounds
|
|
if ( CullEntityByPortals( entity, ps ) ) {
|
|
// we are culled out through this portal chain, but it might
|
|
// still be visible through others
|
|
continue;
|
|
}
|
|
|
|
vEnt = R_SetEntityDefViewEntity( entity );
|
|
|
|
// possibly expand the scissor rect
|
|
vEnt->scissorRect.Union( ps->rect );
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
CullLightByPortals
|
|
|
|
Return true if the light frustum does not intersect the current portal chain.
|
|
The last stack plane is not used because lights are not near clipped.
|
|
================
|
|
*/
|
|
bool idRenderWorldLocal::CullLightByPortals( const idRenderLightLocal *light, const portalStack_t *ps ) {
|
|
int i, j;
|
|
const srfTriangles_t *tri;
|
|
float d;
|
|
idFixedWinding w; // we won't overflow because MAX_PORTAL_PLANES = 20
|
|
|
|
if ( r_useLightCulling.GetInteger() == 0 ) {
|
|
return false;
|
|
}
|
|
|
|
if ( r_useLightCulling.GetInteger() >= 2 ) {
|
|
// exact clip of light faces against all planes
|
|
for ( i = 0; i < 6; i++ ) {
|
|
// the light frustum planes face out from the light,
|
|
// so the planes that have the view origin on the negative
|
|
// side will be the "back" faces of the light, which must have
|
|
// some fragment inside the portalStack to be visible
|
|
if ( light->frustum[i].Distance( tr.viewDef->renderView.vieworg ) >= 0 ) {
|
|
continue;
|
|
}
|
|
|
|
// get the exact winding for this side
|
|
const idWinding *ow = light->frustumWindings[i];
|
|
|
|
// projected lights may have one of the frustums degenerated
|
|
if ( !ow ) {
|
|
continue;
|
|
}
|
|
|
|
w = *ow;
|
|
|
|
// now check the winding against each of the portalStack planes
|
|
for ( j = 0; j < ps->numPortalPlanes - 1; j++ ) {
|
|
if ( !w.ClipInPlace( -ps->portalPlanes[j] ) ) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if ( w.GetNumPoints() ) {
|
|
// part of the winding is visible through the portalStack,
|
|
// so the light is not culled
|
|
return false;
|
|
}
|
|
}
|
|
// none of the light surfaces were visible
|
|
return true;
|
|
|
|
} else {
|
|
|
|
// simple point check against each plane
|
|
tri = light->frustumTris;
|
|
|
|
// check against frustum planes
|
|
for ( i = 0; i < ps->numPortalPlanes - 1; i++ ) {
|
|
for ( j = 0; j < tri->numVerts; j++ ) {
|
|
d = ps->portalPlanes[i].Distance( tri->verts[j].xyz );
|
|
if ( d < 0.0f ) {
|
|
break; // point is inside this plane
|
|
}
|
|
}
|
|
if ( j == tri->numVerts ) {
|
|
// all points were outside one of the planes
|
|
tr.pc.c_box_cull_out++;
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
===================
|
|
AddAreaLightRefs
|
|
|
|
This is the only point where lights get added to the viewLights list
|
|
===================
|
|
*/
|
|
void idRenderWorldLocal::AddAreaLightRefs( int areaNum, const portalStack_t *ps ) {
|
|
areaReference_t *lref;
|
|
portalArea_t *area;
|
|
idRenderLightLocal *light;
|
|
viewLight_t *vLight;
|
|
|
|
area = &portalAreas[ areaNum ];
|
|
|
|
for ( lref = area->lightRefs.areaNext ; lref != &area->lightRefs ; lref = lref->areaNext ) {
|
|
light = lref->light;
|
|
|
|
// debug tool to allow viewing of only one light at a time
|
|
if ( r_singleLight.GetInteger() >= 0 && r_singleLight.GetInteger() != light->index ) {
|
|
continue;
|
|
}
|
|
|
|
// check for being closed off behind a door
|
|
// a light that doesn't cast shadows will still light even if it is behind a door
|
|
if ( r_useLightCulling.GetInteger() >= 3 &&
|
|
!light->parms.noShadows && light->lightShader->LightCastsShadows()
|
|
&& light->areaNum != -1 && !tr.viewDef->connectedAreas[ light->areaNum ] ) {
|
|
continue;
|
|
}
|
|
|
|
// cull frustum
|
|
if ( CullLightByPortals( light, ps ) ) {
|
|
// we are culled out through this portal chain, but it might
|
|
// still be visible through others
|
|
continue;
|
|
}
|
|
|
|
vLight = R_SetLightDefViewLight( light );
|
|
|
|
// expand the scissor rect
|
|
vLight->scissorRect.Union( ps->rect );
|
|
}
|
|
}
|
|
|
|
/*
|
|
===================
|
|
AddAreaRefs
|
|
|
|
This may be entered multiple times with different planes
|
|
if more than one portal sees into the area
|
|
===================
|
|
*/
|
|
void idRenderWorldLocal::AddAreaRefs( int areaNum, const portalStack_t *ps ) {
|
|
// mark the viewCount, so r_showPortals can display the
|
|
// considered portals
|
|
portalAreas[ areaNum ].viewCount = tr.viewCount;
|
|
|
|
// add the models and lights, using more precise culling to the planes
|
|
AddAreaEntityRefs( areaNum, ps );
|
|
AddAreaLightRefs( areaNum, ps );
|
|
}
|
|
|
|
/*
|
|
===================
|
|
BuildConnectedAreas_r
|
|
===================
|
|
*/
|
|
void idRenderWorldLocal::BuildConnectedAreas_r( int areaNum ) {
|
|
portalArea_t *area;
|
|
portal_t *portal;
|
|
|
|
if ( tr.viewDef->connectedAreas[areaNum] ) {
|
|
return;
|
|
}
|
|
|
|
tr.viewDef->connectedAreas[areaNum] = true;
|
|
|
|
// flood through all non-blocked portals
|
|
area = &portalAreas[ areaNum ];
|
|
for ( portal = area->portals ; portal ; portal = portal->next ) {
|
|
if ( !(portal->doublePortal->blockingBits & PS_BLOCK_VIEW) ) {
|
|
BuildConnectedAreas_r( portal->intoArea );
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
===================
|
|
BuildConnectedAreas
|
|
|
|
This is only valid for a given view, not all views in a frame
|
|
===================
|
|
*/
|
|
void idRenderWorldLocal::BuildConnectedAreas( void ) {
|
|
int i;
|
|
|
|
tr.viewDef->connectedAreas = (bool *)R_FrameAlloc( numPortalAreas
|
|
* sizeof( tr.viewDef->connectedAreas[0] ) );
|
|
|
|
// if we are outside the world, we can see all areas
|
|
if ( tr.viewDef->areaNum == -1 ) {
|
|
for ( i = 0 ; i < numPortalAreas ; i++ ) {
|
|
tr.viewDef->connectedAreas[i] = true;
|
|
}
|
|
return;
|
|
}
|
|
|
|
// start with none visible, and flood fill from the current area
|
|
memset( tr.viewDef->connectedAreas, 0, numPortalAreas * sizeof( tr.viewDef->connectedAreas[0] ) );
|
|
BuildConnectedAreas_r( tr.viewDef->areaNum );
|
|
}
|
|
|
|
/*
|
|
=============
|
|
FindViewLightsAndEntites
|
|
|
|
All the modelrefs and lightrefs that are in visible areas
|
|
will have viewEntitys and viewLights created for them.
|
|
|
|
The scissorRects on the viewEntitys and viewLights may be empty if
|
|
they were considered, but not actually visible.
|
|
=============
|
|
*/
|
|
void idRenderWorldLocal::FindViewLightsAndEntities( void ) {
|
|
// clear the visible lightDef and entityDef lists
|
|
tr.viewDef->viewLights = NULL;
|
|
tr.viewDef->viewEntitys = NULL;
|
|
|
|
// find the area to start the portal flooding in
|
|
if ( !r_usePortals.GetBool() ) {
|
|
// debug tool to force no portal culling
|
|
tr.viewDef->areaNum = -1;
|
|
} else {
|
|
tr.viewDef->areaNum = PointInArea( tr.viewDef->initialViewAreaOrigin );
|
|
}
|
|
|
|
// determine all possible connected areas for
|
|
// light-behind-door culling
|
|
BuildConnectedAreas();
|
|
|
|
// bump the view count, invalidating all
|
|
// visible areas
|
|
tr.viewCount++;
|
|
|
|
// flow through all the portals and add models / lights
|
|
if ( r_singleArea.GetBool() ) {
|
|
// if debugging, only mark this area
|
|
// if we are outside the world, don't draw anything
|
|
if ( tr.viewDef->areaNum >= 0 ) {
|
|
portalStack_t ps;
|
|
int i;
|
|
static int lastPrintedAreaNum;
|
|
|
|
if ( tr.viewDef->areaNum != lastPrintedAreaNum ) {
|
|
lastPrintedAreaNum = tr.viewDef->areaNum;
|
|
common->Printf( "entering portal area %i\n", tr.viewDef->areaNum );
|
|
}
|
|
|
|
for ( i = 0 ; i < 5 ; i++ ) {
|
|
ps.portalPlanes[i] = tr.viewDef->frustum[i];
|
|
}
|
|
ps.numPortalPlanes = 5;
|
|
ps.rect = tr.viewDef->scissor;
|
|
|
|
AddAreaRefs( tr.viewDef->areaNum, &ps );
|
|
}
|
|
} else {
|
|
// note that the center of projection for flowing through portals may
|
|
// be a different point than initialViewAreaOrigin for subviews that
|
|
// may have the viewOrigin in a solid/invalid area
|
|
FlowViewThroughPortals( tr.viewDef->renderView.vieworg, 5, tr.viewDef->frustum );
|
|
}
|
|
}
|
|
|
|
/*
|
|
==============
|
|
NumPortals
|
|
==============
|
|
*/
|
|
int idRenderWorldLocal::NumPortals( void ) const {
|
|
return numInterAreaPortals;
|
|
}
|
|
|
|
/*
|
|
==============
|
|
FindPortal
|
|
|
|
Game code uses this to identify which portals are inside doors.
|
|
Returns 0 if no portal contacts the bounds
|
|
==============
|
|
*/
|
|
qhandle_t idRenderWorldLocal::FindPortal( const idBounds &b ) const {
|
|
int i, j;
|
|
idBounds wb;
|
|
doublePortal_t *portal;
|
|
idWinding *w;
|
|
|
|
for ( i = 0 ; i < numInterAreaPortals ; i++ ) {
|
|
portal = &doublePortals[i];
|
|
w = portal->portals[0]->w;
|
|
|
|
wb.Clear();
|
|
for ( j = 0 ; j < w->GetNumPoints() ; j++ ) {
|
|
wb.AddPoint( (*w)[j].ToVec3() );
|
|
}
|
|
if ( wb.IntersectsBounds( b ) ) {
|
|
return i + 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
=============
|
|
FloodConnectedAreas
|
|
=============
|
|
*/
|
|
void idRenderWorldLocal::FloodConnectedAreas( portalArea_t *area, int portalAttributeIndex ) {
|
|
if ( area->connectedAreaNum[portalAttributeIndex] == connectedAreaNum ) {
|
|
return;
|
|
}
|
|
area->connectedAreaNum[portalAttributeIndex] = connectedAreaNum;
|
|
|
|
for ( portal_t *p = area->portals ; p ; p = p->next ) {
|
|
if ( !(p->doublePortal->blockingBits & (1<<portalAttributeIndex) ) ) {
|
|
FloodConnectedAreas( &portalAreas[p->intoArea], portalAttributeIndex );
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
==============
|
|
AreasAreConnected
|
|
|
|
==============
|
|
*/
|
|
bool idRenderWorldLocal::AreasAreConnected( int areaNum1, int areaNum2, portalConnection_t connection ) {
|
|
if ( areaNum1 == -1 || areaNum2 == -1 ) {
|
|
return false;
|
|
}
|
|
if ( areaNum1 > numPortalAreas || areaNum2 > numPortalAreas || areaNum1 < 0 || areaNum2 < 0 ) {
|
|
common->Error( "idRenderWorldLocal::AreAreasConnected: bad parms: %i, %i", areaNum1, areaNum2 );
|
|
}
|
|
|
|
int attribute = 0;
|
|
|
|
int intConnection = (int)connection;
|
|
|
|
while ( intConnection > 1 ) {
|
|
attribute++;
|
|
intConnection >>= 1;
|
|
}
|
|
if ( attribute >= NUM_PORTAL_ATTRIBUTES || ( 1 << attribute ) != (int)connection ) {
|
|
common->Error( "idRenderWorldLocal::AreasAreConnected: bad connection number: %i\n", (int)connection );
|
|
}
|
|
|
|
return portalAreas[areaNum1].connectedAreaNum[attribute] == portalAreas[areaNum2].connectedAreaNum[attribute];
|
|
}
|
|
|
|
|
|
/*
|
|
==============
|
|
SetPortalState
|
|
|
|
doors explicitly close off portals when shut
|
|
==============
|
|
*/
|
|
void idRenderWorldLocal::SetPortalState( qhandle_t portal, int blockTypes ) {
|
|
if ( portal == 0 ) {
|
|
return;
|
|
}
|
|
|
|
if ( portal < 1 || portal > numInterAreaPortals ) {
|
|
common->Error( "SetPortalState: bad portal number %i", portal );
|
|
}
|
|
int old = doublePortals[portal-1].blockingBits;
|
|
if ( old == blockTypes ) {
|
|
return;
|
|
}
|
|
doublePortals[portal-1].blockingBits = blockTypes;
|
|
|
|
// leave the connectedAreaGroup the same on one side,
|
|
// then flood fill from the other side with a new number for each changed attribute
|
|
for ( int i = 0 ; i < NUM_PORTAL_ATTRIBUTES ; i++ ) {
|
|
if ( ( old ^ blockTypes ) & ( 1 << i ) ) {
|
|
connectedAreaNum++;
|
|
FloodConnectedAreas( &portalAreas[doublePortals[portal-1].portals[1]->intoArea], i );
|
|
}
|
|
}
|
|
|
|
if ( session->writeDemo ) {
|
|
session->writeDemo->WriteInt( DS_RENDER );
|
|
session->writeDemo->WriteInt( DC_SET_PORTAL_STATE );
|
|
session->writeDemo->WriteInt( portal );
|
|
session->writeDemo->WriteInt( blockTypes );
|
|
}
|
|
}
|
|
|
|
/*
|
|
==============
|
|
GetPortalState
|
|
==============
|
|
*/
|
|
int idRenderWorldLocal::GetPortalState( qhandle_t portal ) {
|
|
if ( portal == 0 ) {
|
|
return 0;
|
|
}
|
|
|
|
if ( portal < 1 || portal > numInterAreaPortals ) {
|
|
common->Error( "GetPortalState: bad portal number %i", portal );
|
|
}
|
|
|
|
return doublePortals[portal-1].blockingBits;
|
|
}
|
|
|
|
/*
|
|
=====================
|
|
idRenderWorldLocal::ShowPortals
|
|
|
|
Debugging tool, won't work correctly with SMP or when mirrors are present
|
|
=====================
|
|
*/
|
|
void idRenderWorldLocal::ShowPortals() {
|
|
int i, j;
|
|
portalArea_t *area;
|
|
portal_t *p;
|
|
idWinding *w;
|
|
|
|
// flood out through portals, setting area viewCount
|
|
for ( i = 0 ; i < numPortalAreas ; i++ ) {
|
|
area = &portalAreas[i];
|
|
if ( area->viewCount != tr.viewCount ) {
|
|
continue;
|
|
}
|
|
for ( p = area->portals ; p ; p = p->next ) {
|
|
w = p->w;
|
|
if ( !w ) {
|
|
continue;
|
|
}
|
|
|
|
if ( portalAreas[ p->intoArea ].viewCount != tr.viewCount ) {
|
|
// red = can't see
|
|
qglColor3f( 1, 0, 0 );
|
|
} else {
|
|
// green = see through
|
|
qglColor3f( 0, 1, 0 );
|
|
}
|
|
|
|
qglBegin( GL_LINE_LOOP );
|
|
for ( j = 0 ; j < w->GetNumPoints() ; j++ ) {
|
|
qglVertex3fv( (*w)[j].ToFloatPtr() );
|
|
}
|
|
qglEnd();
|
|
}
|
|
}
|
|
}
|