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romkazvo
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Cry3DEngine/ObjManDraw.cpp
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213
Cry3DEngine/ObjManDraw.cpp
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////////////////////////////////////////////////////////////////////////////
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//
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// Crytek Engine Source File.
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// Copyright (C), Crytek Studios, 2002.
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// -------------------------------------------------------------------------
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// File name: statobjmandraw.cpp
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// Version: v1.00
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// Created: 28/5/2001 by Vladimir Kajalin
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// Compilers: Visual Studio.NET
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// Description: Draw static objects (vegetations)
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// -------------------------------------------------------------------------
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// History:
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//
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////////////////////////////////////////////////////////////////////////////
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#include "stdafx.h"
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#include "StatObj.h"
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#include "objman.h"
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#include "visareas.h"
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#include "terrain_sector.h"
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#include "3dengine.h"
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#include "cbuffer.h"
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bool CObjManager::IsBoxOccluded( const Vec3d & vBoxMin, const Vec3d & vBoxMax, float fDistance, OcclusionTestClient * pOcclTestVars )
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{
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FUNCTION_PROFILER_FAST( GetSystem(),PROFILE_3DENGINE,m_bProfilerEnabled );
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assert(pOcclTestVars);
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assert(fDistance>=0);
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if(m_nRenderStackLevel)
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return pOcclTestVars->bLastResult; // return result of base level test
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if(pOcclTestVars->nLastVisibleFrameID < GetFrameID()-1)
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{ // if was invisible last frames (because of frustum culling)
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pOcclTestVars->ucOcclusionByObjectsFrames = 0; // force to test this frame
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if(GetCVars()->e_terrain_occlusion_culling!=2)
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pOcclTestVars->ucOcclusionByTerrainFrames = 0; // force to test this frame
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}
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{ // test occlusion by objects
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if(!pOcclTestVars->ucOcclusionByObjectsFrames && fDistance>COVERAGEBUFFER_OCCLUSION_TESTERS_MIN_DISTANCE && GetCVars()->e_cbuffer)
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{ // less distance do not work because objects are sorted wrong
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if(!m_pCoverageBuffer->IsBBoxVisible(vBoxMin,vBoxMax))
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{
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pOcclTestVars->ucOcclusionByObjectsFrames = 0; // force to test next frame
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pOcclTestVars->bLastResult = true;
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return true;
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}
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}
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pOcclTestVars->ucOcclusionByObjectsFrames += 4; // skip testing next frame
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}
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/*
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{ // test occl by antiportals
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if(GetVisAreaManager()->IsOccludedByOcclVolumes(vBoxMin,vBoxMax))
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return true;
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}
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*/
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{ // test occlusion by terrain
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Vec3d vTopMax = vBoxMax;
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Vec3d vTopMin = vBoxMin; vTopMin.z = vTopMax.z;
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const Vec3d & vCamPos = GetViewCamera().GetPos();
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vTopMax.CheckMin(Vec3d((float)CTerrain::GetTerrainSize(),(float)CTerrain::GetTerrainSize(),1024.f));
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vTopMin.CheckMax(Vec3d(0,0,-1024.f));
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vTopMin.CheckMin(Vec3d((float)CTerrain::GetTerrainSize(),(float)CTerrain::GetTerrainSize(),1024.f));
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vTopMax.CheckMax(Vec3d(0,0,-1024.f));
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if( !pOcclTestVars->ucOcclusionByTerrainFrames && GetCVars()->e_terrain_occlusion_culling )
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{
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int nMaxTestsToScip = (GetVisAreaManager()->m_pCurPortal) ? 3 : 10000;
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// precision in meters for this object
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float fMaxStep = fDistance*GetCVars()->e_terrain_occlusion_culling_precision;
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if( (fMaxStep < (vTopMax.x - vTopMin.x)*2.f || fMaxStep < (vTopMax.y - vTopMin.y)*2.f) &&
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// fDistance<700 &&
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vBoxMin.x != vBoxMax.x && vBoxMin.y != vBoxMax.y )
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{
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bool bOccluded = true;
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// todo: debug this
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float dx = (vTopMax.x - vTopMin.x)*0.99999f;
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while(dx>fMaxStep)
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dx*=0.5f;
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float dy = (vTopMax.y - vTopMin.y)*0.99999f;
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while(dy>fMaxStep)
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dy*=0.5f;
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// todo: test only borders
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for(float x=vTopMin.x; x<=vTopMax.x; x+=dx)
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for(float y=vTopMin.y; y<=vTopMax.y; y+=dy)
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{
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if(!m_pTerrain->IsPointOccludedByTerrain(Vec3d(x, y, vTopMax.z), fDistance, vCamPos, nMaxTestsToScip))
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{
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bOccluded = false;
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x=y=1000000;//break
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}
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}
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if(bOccluded)
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{
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if(GetCVars()->e_terrain_occlusion_culling!=2)
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pOcclTestVars->ucOcclusionByTerrainFrames = 0; // force to test next frame
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pOcclTestVars->bLastResult = true;
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return true;
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}
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}
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else
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{
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Vec3d vTopMid = (vTopMin+vTopMax)*0.5f;
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if( m_pTerrain->IsPointOccludedByTerrain(vTopMid, fDistance,vCamPos, nMaxTestsToScip))
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{
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if(GetCVars()->e_terrain_occlusion_culling!=2)
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pOcclTestVars->ucOcclusionByTerrainFrames = 0; // force to test next frame
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pOcclTestVars->bLastResult = true;
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return true;
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}
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}
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}
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if(pOcclTestVars->ucOcclusionByTerrainFrames == 0) // && GetCVars()->e_terrain_occlusion_culling==3)
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{ // randomize test time, do this only here otherwice ucOcclusionByTerrainFrames may never become 0 and next test will not happend
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static int arrRnd[16] =
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{
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rand()%4+1, rand()%4+1, rand()%4+1, rand()%4+1,
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rand()%4+1, rand()%4+1, rand()%4+1, rand()%4+1,
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rand()%4+1, rand()%4+1, rand()%4+1, rand()%4+1,
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rand()%4+1, rand()%4+1, rand()%4+1, rand()%4+1
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};
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static int nRndCounter = 0;
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nRndCounter++;
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if(nRndCounter>=16)
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nRndCounter=0;
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pOcclTestVars->ucOcclusionByTerrainFrames = arrRnd[nRndCounter]*4;
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}
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else
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pOcclTestVars->ucOcclusionByTerrainFrames += 4; // skip testing next 64 frames
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}
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/* const Vec3d & vCamPos = GetViewCamera().GetPos();
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bool bCameraInBBox =
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vCamPos.x >= (vBoxMin.x-0.05f) && vCamPos.y >= (vBoxMin.y-0.05f) && vCamPos.z >= (vBoxMin.z-0.05f) &&
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vCamPos.x <= (vBoxMax.x+0.05f) && vCamPos.y <= (vBoxMax.y+0.05f) && vCamPos.z <= (vBoxMax.z+0.05f);
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// Make test only if camera outside of the box and if feature supported
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if(fDistance>1 && !bCameraInBBox && GetCVars()->e_hw_occlusion_culling_objects && (GetRenderer()->GetFeatures() & RFT_OCCLUSIONTEST) )
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{
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// construct RE if needed
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for(int i=0; i<2; i++)
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{
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if(!pOcclTestVars->arrREOcclusionQuery[i])
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pOcclTestVars->arrREOcclusionQuery[i] =
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(CREOcclusionQuery *)GetRenderer()->EF_CreateRE(eDATA_OcclusionQuery);
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pOcclTestVars->arrREOcclusionQuery[i]->m_vBoxMin = vBoxMin;
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pOcclTestVars->arrREOcclusionQuery[i]->m_vBoxMax = vBoxMax;
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}
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int nSlotId = GetFrameID()&1;
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GetRenderer()->EF_AddEf(0, pOcclTestVars->arrREOcclusionQuery[nSlotId], m_pShaderOcclusionQuery, 0);
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if(GetCVars()->e_hw_occlusion_culling_objects>1)
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{
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float fVis = (pOcclTestVars->arrREOcclusionQuery[!nSlotId]->m_nVisSamples >= 2);
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float fCol[] = {fVis,!fVis,1,1};
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GetRenderer()->DrawLabelEx((vBoxMin + vBoxMax)*0.5f,6, fCol, false, true, "%s",
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fVis ? "V" : "N");
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}
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if(
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pOcclTestVars->arrREOcclusionQuery[0]->m_nVisSamples < 2 &&
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pOcclTestVars->arrREOcclusionQuery[1]->m_nVisSamples < 2 &&
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1 >= abs( pOcclTestVars->arrREOcclusionQuery[0]->m_nCheckFrame -
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pOcclTestVars->arrREOcclusionQuery[1]->m_nCheckFrame ) &&
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GetFrameID()-2 <= pOcclTestVars->arrREOcclusionQuery[0]->m_nDrawFrame &&
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GetFrameID()-2 <= pOcclTestVars->arrREOcclusionQuery[1]->m_nDrawFrame )
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{ // return true only if last test is not older than 1 frame
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pOcclTestVars->bLastResult = true;
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return true;
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}
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}*/
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pOcclTestVars->bLastResult = false;
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pOcclTestVars->nLastVisibleFrameID = GetFrameID();
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return false;
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}
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void CObjManager::PrefechObjects()
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{
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for (ObjectsMap::iterator it = m_lstLoadedObjects.begin(); it != m_lstLoadedObjects.end(); ++it)
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{
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CStatObj * pStatObj = (*it);
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SRendParams params;
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params.nDLightMask = 1;
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GetRenderer()->EF_StartEf();
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for(int i=0; i<3; i++)
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pStatObj->Render(params,Vec3(zero),i);
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GetRenderer()->EF_EndEf3D(0);
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}
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}
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