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Serious-Engine/Sources/Engine/Light/LayerMaker.cpp
Daniel Gibson 72edf1c720 Commented out unused functions and variables 
many unused functions and variables are now commented out

You'll still get tons of warnings, which should mostly fall in one of
the following categories:
1. Unnecessary variables or values generated from .es scripts
2. Pointers assigned to from functions with side-effects: DO NOT REMOVE!
   Like CEntity *penNew = CreateEntity_t(...); - even if penNew isn't
   used, CreateEntity() must be called there!
2016-05-09 18:51:03 +02:00

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/* Copyright (c) 2002-2012 Croteam Ltd.
This program is free software; you can redistribute it and/or modify
it under the terms of version 2 of the GNU General Public License as published by
the Free Software Foundation
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */
#include "Engine/StdH.h"
#include <Engine/Rendering/Render_internal.h>
#include <Engine/Brushes/Brush.h>
#include <Engine/Brushes/BrushTransformed.h>
#include <Engine/Light/LightSource.h>
#include <Engine/Base/ListIterator.inl>
#include <Engine/Graphics/Color.h>
#include <Engine/World/World.h>
#include <Engine/Entities/Entity.h>
#include <Engine/Templates/StaticArray.cpp>
#include <Engine/Graphics/GfxLibrary.h>
#include <Engine/Math/Clipping.inl>
#include <Engine/Light/Shadows_internal.h>
#include <Engine/World/WorldEditingProfile.h>
//#include <Engine/Graphics/ImageInfo.h>
//#include <Engine/Base/ErrorReporting.h>
INDEX _ctShadowLayers=0;
INDEX _ctShadowClusters=0;
// class used for making shadow layers (used only locally)
class CLayerMaker {
// implementation:
public:
// information about current polygon
CBrushPolygon *lm_pbpoPolygon; // the polygon
CBrushShadowMap *lm_pbsmShadowMap; // the shadow map on the polygon
FLOAT lm_fMipFactor; // the mip factor of this polygon
CWorld *lm_pwoWorld; // world for casting rays in
CBrushShadowLayer *lm_pbslLayer;// current layer
// dimensions of currently processed shadow map
MEX lm_mexSizeU; // size in mex
MEX lm_mexSizeV;
MEX lm_mexOffsetU; // offsets in mex
MEX lm_mexOffsetV;
INDEX lm_iMipLevel; // mip level
PIX lm_pixSizeU; // size in pixels
PIX lm_pixSizeV;
struct MipmapTable lm_mmtPolygonMask; // mip map table of the polygon mask
PIX lm_pixLayerMinU; // layer rectangle inside shadow map
PIX lm_pixLayerMinV;
PIX lm_pixLayerSizeU;
PIX lm_pixLayerSizeV;
FLOAT lm_fpixHotU;
FLOAT lm_fpixHotV;
FLOAT lm_fLightPlaneDistance;
struct MipmapTable lm_mmtLayer; // mip map table of the layer
UBYTE *lm_pubPolygonMask; // bit-packed mask of where the current polygon is
UBYTE *lm_pubLayer; // bit-packed mask of where the current light lights the polygon
FLOAT3D lm_vLight; // position of the light source
// gradients for shadow map walking
FLOAT3D lm_vO; // upper left corner of shadow map in 3D
FLOAT3D lm_vStepU; // step between pixels in same row
FLOAT3D lm_vStepV; // step between rows
ANGLE3D lm_aMappingOrientation; // orientation of the texture map in 3D
ANGLE3D lm_aInverseMappingOrientation;
FLOATmatrix3D lm_mToInverseMapping; // matrix for parallel lights
CLightSource *lm_plsLight; // current light
// remember general data
void CalculateData(void);
// make bit-packed mask of where the polygon is in the shadow map
void MakePolygonMask(void);
// make shadow mask for the light
ULONG MakeShadowMask(CBrushShadowLayer *pbsl);
ULONG MakeOneShadowMaskMip(INDEX iMip);
// flip shadow mask around V axis (for parallel lights)
void FlipShadowMask(INDEX iMip);
/* Spread the shadow towards pixels outside of polygon. */
void SpreadShadowMaskOutwards(void);
/* Spread the shadow towards pixels inside of polygon. */
void SpreadShadowMaskInwards(void);
public:
// interface:
/* Constructor. */
CLayerMaker(void);
/* Cast shadows for all layers of a given polygon. */
BOOL CreateLayers(CBrushPolygon &bpo, CWorld &woWorld, BOOL bDoDirectionalLights);
};
/* Make mip-maps of the shadow mask. */
static void MakeMipmapsForMask(UBYTE *pubMask, PIX pixSizeU, PIX pixSizeV, SLONG slTotalSize)
{
// remember pointer after first mip map
UBYTE *pubSecond = pubMask+pixSizeU*pixSizeV;
// start at the first mip map
UBYTE *pubThis = pubMask;
PIX pixThisSizeU = pixSizeU;
PIX pixThisSizeV = pixSizeV;
UBYTE *pubNext;
PIX pixNextSizeU;
PIX pixNextSizeV;
// repeat
for(;;) {
// calculate size and position of next mip map
pubNext = pubThis+pixThisSizeU*pixThisSizeV;
pixNextSizeU = pixThisSizeU/2;
pixNextSizeV = pixThisSizeV/2;
// if the next mip map is too small
if (pixNextSizeU<1 || pixNextSizeV<1) {
// stop
break;
}
// for each pixel in the next mip map
UBYTE *pub = pubNext;
for (PIX pixNextV=0; pixNextV<pixNextSizeV; pixNextV++) {
for (PIX pixNextU=0; pixNextU<pixNextSizeU; pixNextU++) {
// calculate the pixel from four pixels in this mip-map
UBYTE *pubUL = pubThis+pixNextU*2+pixNextV*2*pixThisSizeU;
UBYTE *pubUR = pubUL+1;
UBYTE *pubDL = pubUL+pixThisSizeU;
UBYTE *pubDR = pubDL+1;
ASSERT(pubDR<pubNext);
ULONG ulTotal = ULONG(*pubUL)+ULONG(*pubUR)+ULONG(*pubDL)+ULONG(*pubDR);
*pub++ = ulTotal/4;
}
}
// make next mip-map current
pubThis = pubNext;
pixThisSizeU = pixNextSizeU;
pixThisSizeV = pixNextSizeV;
}
// must have passed exactly all mip-maps
ASSERT(pubNext==pubMask+slTotalSize);
// for each pixel in all mip-maps after first
UBYTE *pubEnd = pubNext;
for (UBYTE *pub=pubSecond; pub<pubEnd; pub++) {
// normalize the pixel to 0-255
if (*pub<=128) {
*pub = 0;
} else {
*pub = 255;
}
}
}
// convert byte packed array to bits (can perform inplace conversion)
// NOTE: needs +8 bytes safety wall at the end
static void ConvertBytesToBits(UBYTE *pubBytesSrc, UBYTE *pubBitsDst, INDEX ctBytes)
{
// for each byte of bits
for (INDEX i=0; i<(ctBytes+7)/8; i++) {
// compose it from 8 bytes (note that bytes are either 0 or 255)
*pubBitsDst++ =
(pubBytesSrc[0]&0x01)|
(pubBytesSrc[1]&0x02)|
(pubBytesSrc[2]&0x04)|
(pubBytesSrc[3]&0x08)|
(pubBytesSrc[4]&0x10)|
(pubBytesSrc[5]&0x20)|
(pubBytesSrc[6]&0x40)|
(pubBytesSrc[7]&0x80);
pubBytesSrc+=8;
}
}
// convert bit packed array to bytes
// NOTE: needs +8 bytes safety wall at the end
static void ConvertBitsToBytes(UBYTE *pubBitsSrc, UBYTE *pubBytesDst, INDEX ctBytes)
{
// for each byte of bits
for (INDEX i=0; i<(ctBytes+7)/8; i++) {
// decompose it to 8 bytes
pubBytesDst[0] = (*pubBitsSrc)&0x01;
pubBytesDst[1] = (*pubBitsSrc)&0x02;
pubBytesDst[2] = (*pubBitsSrc)&0x04;
pubBytesDst[3] = (*pubBitsSrc)&0x08;
pubBytesDst[4] = (*pubBitsSrc)&0x10;
pubBytesDst[5] = (*pubBitsSrc)&0x20;
pubBytesDst[6] = (*pubBitsSrc)&0x40;
pubBytesDst[7] = (*pubBitsSrc)&0x80;
pubBitsSrc++;
pubBytesDst+=8;
}
}
// remember general data
void CLayerMaker::CalculateData(void)
{
lm_mexSizeU = lm_pbsmShadowMap->sm_mexWidth;
lm_mexSizeV = lm_pbsmShadowMap->sm_mexHeight;
lm_mexOffsetU = lm_pbsmShadowMap->sm_mexOffsetX;
lm_mexOffsetV = lm_pbsmShadowMap->sm_mexOffsetY;
lm_iMipLevel = lm_pbsmShadowMap->sm_iFirstMipLevel;
lm_pixSizeU = lm_mexSizeU>>lm_iMipLevel;
lm_pixSizeV = lm_mexSizeV>>lm_iMipLevel;
// find mip-mapping information for the polygon mask
MakeMipmapTable( lm_pixSizeU, lm_pixSizeV, lm_mmtPolygonMask);
CEntity *penWithPolygon = lm_pbpoPolygon->bpo_pbscSector->bsc_pbmBrushMip->bm_pbrBrush->br_penEntity;
ASSERT(penWithPolygon!=NULL);
const FLOATmatrix3D &mPolygonRotation = penWithPolygon->en_mRotation;
const FLOAT3D &vPolygonTranslation = penWithPolygon->GetPlacement().pl_PositionVector;
// get first pixel in texture in 3D
Vector<MEX, 2> vmex0;
vmex0(1) = -lm_mexOffsetU; //+(1<<(lm_iMipLevel-1));
vmex0(2) = -lm_mexOffsetV; //+(1<<(lm_iMipLevel-1));
lm_pbpoPolygon->bpo_mdShadow.GetSpaceCoordinates(
lm_pbpoPolygon->bpo_pbplPlane->bpl_pwplWorking->wpl_mvRelative,
vmex0, lm_vO);
lm_vO = lm_vO*mPolygonRotation+vPolygonTranslation;
// get steps for walking in texture in 3D
Vector<MEX, 2> vmexU, vmexV;
vmexU(1) = (1<<lm_iMipLevel)-lm_mexOffsetU; //+(1<<(lm_iMipLevel-1));
vmexU(2) = (0<<lm_iMipLevel)-lm_mexOffsetV; //+(1<<(lm_iMipLevel-1));
vmexV(1) = (0<<lm_iMipLevel)-lm_mexOffsetU; //+(1<<(lm_iMipLevel-1));
vmexV(2) = (1<<lm_iMipLevel)-lm_mexOffsetV; //+(1<<(lm_iMipLevel-1));
lm_pbpoPolygon->bpo_mdShadow.GetSpaceCoordinates(
lm_pbpoPolygon->bpo_pbplPlane->bpl_pwplWorking->wpl_mvRelative,
vmexU, lm_vStepU);
lm_vStepU = lm_vStepU*mPolygonRotation+vPolygonTranslation;
lm_pbpoPolygon->bpo_mdShadow.GetSpaceCoordinates(
lm_pbpoPolygon->bpo_pbplPlane->bpl_pwplWorking->wpl_mvRelative,
vmexV, lm_vStepV);
lm_vStepV = lm_vStepV*mPolygonRotation+vPolygonTranslation;
lm_vStepU-=lm_vO;
lm_vStepV-=lm_vO;
// make 3 orthogonal vectors that define mapping orientation
FLOAT3D vX = lm_vStepU;
FLOAT3D vY = -lm_vStepV;
FLOAT3D vZ = vX*vY;
// make a rotation matrix from those vectors
vX.Normalize();
vY.Normalize();
vZ.Normalize();
FLOATmatrix3D mOrientation;
mOrientation(1,1) = vX(1); mOrientation(1,2) = vY(1); mOrientation(1,3) = vZ(1);
mOrientation(2,1) = vX(2); mOrientation(2,2) = vY(2); mOrientation(2,3) = vZ(2);
mOrientation(3,1) = vX(3); mOrientation(3,2) = vY(3); mOrientation(3,3) = vZ(3);
FLOATmatrix3D mInvOrientation;
mInvOrientation(1,1) = -vX(1); mInvOrientation(1,2) = vY(1); mInvOrientation(1,3) = -vZ(1);
mInvOrientation(2,1) = -vX(2); mInvOrientation(2,2) = vY(2); mInvOrientation(2,3) = -vZ(2);
mInvOrientation(3,1) = -vX(3); mInvOrientation(3,2) = vY(3); mInvOrientation(3,3) = -vZ(3);
// make orientation angles from the matrix
DecomposeRotationMatrixNoSnap(lm_aMappingOrientation, mOrientation);
DecomposeRotationMatrixNoSnap(lm_aInverseMappingOrientation, mInvOrientation);
// remember matrix for parallel lights
lm_mToInverseMapping = !mInvOrientation;
}
// test if a point is inside a brush polygon
inline BOOL TestPointInPolygon(CBrushPolygon &bpo, const FLOAT3D &v)
{
// find major axes of the polygon plane
INDEX iMajorAxis1 = bpo.bpo_pbplPlane->bpl_iPlaneMajorAxis1;
INDEX iMajorAxis2 = bpo.bpo_pbplPlane->bpl_iPlaneMajorAxis2;
// if the point is not inside the bounding box of polygon (projected to the major plane)
if (v(iMajorAxis1)<bpo.bpo_boxBoundingBox.Min()(iMajorAxis1)
||v(iMajorAxis1)>bpo.bpo_boxBoundingBox.Max()(iMajorAxis1)
||v(iMajorAxis2)<bpo.bpo_boxBoundingBox.Min()(iMajorAxis2)
||v(iMajorAxis2)>bpo.bpo_boxBoundingBox.Max()(iMajorAxis2)
) {
// it is not inside the polygon
return FALSE;
}
// create an intersector
CIntersector isIntersector(v(iMajorAxis1), v(iMajorAxis2));
// for all edges in the polygon
FOREACHINSTATICARRAY(bpo.bpo_abpePolygonEdges, CBrushPolygonEdge, itbpe) {
// get edge vertices (edge direction is irrelevant here!)
const FLOAT3D &vVertex0 = itbpe->bpe_pbedEdge->bed_pbvxVertex0->bvx_vAbsolute;
const FLOAT3D &vVertex1 = itbpe->bpe_pbedEdge->bed_pbvxVertex1->bvx_vAbsolute;
// pass the edge to the intersector
isIntersector.AddEdge(
vVertex0(iMajorAxis1), vVertex0(iMajorAxis2),
vVertex1(iMajorAxis1), vVertex1(iMajorAxis2));
}
// ask the intersector if the point is inside the polygon
return isIntersector.IsIntersecting();
}
/////////////////////////////////////////////////////////////////////
// CLayerMaker
/*
* Constructor.
*/
CLayerMaker::CLayerMaker(void)
{
}
/* Spread the shadow towards pixels outside of polygon. */
void CLayerMaker::SpreadShadowMaskOutwards(void)
{
// for each mip map of the layer
for(INDEX iMipmap=0; iMipmap<lm_mmtLayer.mmt_ctMipmaps; iMipmap++) {
PIX pixLayerMinU = lm_pixLayerMinU>>iMipmap;
PIX pixLayerMinV = lm_pixLayerMinV>>iMipmap;
PIX pixLayerSizeU = lm_pixLayerSizeU>>iMipmap;
PIX pixLayerSizeV = lm_pixLayerSizeV>>iMipmap;
//PIX pixSizeU = lm_pixSizeU>>iMipmap;
//PIX pixSizeV = lm_pixSizeV>>iMipmap;
PIX pixSizeULog2 = FastLog2(lm_pixSizeU)-iMipmap;
UBYTE *pubLayer = lm_pubLayer+lm_mmtLayer.mmt_aslOffsets[iMipmap];
UBYTE *pubPolygonMask = lm_pubPolygonMask+lm_mmtPolygonMask.mmt_aslOffsets[iMipmap];
SLONG slOffsetLayer = 0;
// for each pixel in the layer shadow mask
for (PIX pixLayerV=0; pixLayerV<pixLayerSizeV; pixLayerV++) {
for (PIX pixLayerU=0; pixLayerU<pixLayerSizeU; pixLayerU++) {
PIX pixMapU = pixLayerU+pixLayerMinU;
PIX pixMapV = pixLayerV+pixLayerMinV;
PIX slOffsetMap = pixMapU+(pixMapV<<pixSizeULog2);
// if the pixel is not inside the polygon
if (!pubPolygonMask[slOffsetMap]) {
// find number of all of its neighbours that are in the polygon
// and number of all of them that are not in the shadow
INDEX ctInPolygon = 0;
INDEX ctLighted = 0;
#define ADDNEIGHBOUR(du, dv) \
if ((pixLayerU+(du)>=0) \
&&(pixLayerU+(du)<pixLayerSizeU) \
&&(pixLayerV+(dv)>=0) \
&&(pixLayerV+(dv)<pixLayerSizeV) \
&&(pubPolygonMask[slOffsetMap+(du)+((dv)<<pixSizeULog2)])) { \
ctInPolygon++; \
ctLighted+=pubLayer[slOffsetLayer+(du)+(dv)*pixLayerSizeU]&0x01; \
}
ADDNEIGHBOUR(-2, -2);
ADDNEIGHBOUR(-1, -2);
ADDNEIGHBOUR(+0, -2);
ADDNEIGHBOUR(+1, -2);
ADDNEIGHBOUR(+2, -2);
ADDNEIGHBOUR(-2, -1);
ADDNEIGHBOUR(-1, -1);
ADDNEIGHBOUR(+0, -1);
ADDNEIGHBOUR(+1, -1);
ADDNEIGHBOUR(+2, -1);
ADDNEIGHBOUR(-2, +0);
ADDNEIGHBOUR(-1, +0);
// ADDNEIGHBOUR(+0, +0);
ADDNEIGHBOUR(+1, +0);
ADDNEIGHBOUR(+2, +0);
ADDNEIGHBOUR(-2, +1);
ADDNEIGHBOUR(-1, +1);
ADDNEIGHBOUR(+0, +1);
ADDNEIGHBOUR(+1, +1);
ADDNEIGHBOUR(+2, +1);
ADDNEIGHBOUR(-2, +2);
ADDNEIGHBOUR(-1, +2);
ADDNEIGHBOUR(+0, +2);
ADDNEIGHBOUR(+1, +2);
ADDNEIGHBOUR(+2, +2);
// if there are some neighbours inside, and most of them are lighted
if ((ctInPolygon>0) && (ctLighted>ctInPolygon/2)) {
// make this one lighted
pubLayer[slOffsetLayer] = 255;
// otherwise
} else {
// make this one shadowed
pubLayer[slOffsetLayer] = 0;
}
// if the pixel is inside the polygon
} else {
NOTHING;
}
slOffsetLayer++;
}
}
}
}
/* Spread the shadow towards pixels inside of polygon. */
void CLayerMaker::SpreadShadowMaskInwards(void)
{
// for each mip map of the layer
for(INDEX iMipmap=0; iMipmap<lm_mmtLayer.mmt_ctMipmaps; iMipmap++) {
PIX pixLayerMinU = lm_pixLayerMinU>>iMipmap;
PIX pixLayerMinV = lm_pixLayerMinV>>iMipmap;
PIX pixLayerSizeU = lm_pixLayerSizeU>>iMipmap;
PIX pixLayerSizeV = lm_pixLayerSizeV>>iMipmap;
//PIX pixSizeU = lm_pixSizeU>>iMipmap;
//PIX pixSizeV = lm_pixSizeV>>iMipmap;
PIX pixSizeULog2 = FastLog2(lm_pixSizeU)-iMipmap;
UBYTE *pubLayer = lm_pubLayer+lm_mmtLayer.mmt_aslOffsets[iMipmap];
UBYTE *pubPolygonMask = lm_pubPolygonMask+lm_mmtPolygonMask.mmt_aslOffsets[iMipmap];
SLONG slOffsetLayer = 0;
// for each pixel in the layer shadow mask
for (PIX pixLayerV=0; pixLayerV<pixLayerSizeV; pixLayerV++) {
for (PIX pixLayerU=0; pixLayerU<pixLayerSizeU; pixLayerU++) {
PIX pixMapU = pixLayerU+pixLayerMinU;
PIX pixMapV = pixLayerV+pixLayerMinV;
PIX slOffsetMap = pixMapU+(pixMapV<<pixSizeULog2);
// if the pixel is inside the polygon
if (pubPolygonMask[slOffsetMap]) {
// find number of all of its neighbours that are out of the polygon
// and number of all of them that are not in the shadow
INDEX ctOutPolygon = 0;
INDEX ctLighted = 0;
#undef ADDNEIGHBOUR
#define ADDNEIGHBOUR(du, dv) \
if ((pixLayerU+(du)>=0) \
&&(pixLayerU+(du)<pixLayerSizeU) \
&&(pixLayerV+(dv)>=0) \
&&(pixLayerV+(dv)<pixLayerSizeV)) \
{\
if(!pubPolygonMask[slOffsetMap+(du)+((dv)<<pixSizeULog2)]) { \
ctOutPolygon++; \
ctLighted+=pubLayer[slOffsetLayer+(du)+(dv)*pixLayerSizeU]&0x01; \
}\
}
/*
ADDNEIGHBOUR(-2, -2);
ADDNEIGHBOUR(+2, -2);
ADDNEIGHBOUR(-2, +2);
ADDNEIGHBOUR(+2, +2);
*/
ADDNEIGHBOUR(-1, -2);
ADDNEIGHBOUR(+0, -2);
ADDNEIGHBOUR(+1, -2);
ADDNEIGHBOUR(-2, -1);
ADDNEIGHBOUR(+2, -1);
ADDNEIGHBOUR(-2, +0);
ADDNEIGHBOUR(+2, +0);
ADDNEIGHBOUR(-2, +1);
ADDNEIGHBOUR(+2, +1);
ADDNEIGHBOUR(-1, +2);
ADDNEIGHBOUR(+0, +2);
ADDNEIGHBOUR(+1, +2);
ADDNEIGHBOUR(-1, -1);
ADDNEIGHBOUR(+0, -1);
ADDNEIGHBOUR(+1, -1);
ADDNEIGHBOUR(-1, +0);
// ADDNEIGHBOUR(+0, +0);
ADDNEIGHBOUR(+1, +0);
ADDNEIGHBOUR(-1, +1);
ADDNEIGHBOUR(+0, +1);
ADDNEIGHBOUR(+1, +1);
// if there are some neighbours outside
if (ctOutPolygon>0) {
// if some are not lighted
if (ctLighted<ctOutPolygon) {
// make this one shadowed
pubLayer[slOffsetLayer] = 0;
// otherwise
} else {
// make this one lighted
// pubLayer[slOffsetLayer] = 255;
}
}
// if the pixel is not inside the polygon
} else {
NOTHING;
}
slOffsetLayer++;
}
}
}
}
// make bit-packed mask of where the polygon is in the shadow map
void CLayerMaker::MakePolygonMask(void)
{
// allocate memory for the mask
lm_pubPolygonMask = (UBYTE *)AllocMemory(lm_mmtPolygonMask.mmt_slTotalSize+8);
// if there is packed polygon mask remembered in the shadow map
if (lm_pbsmShadowMap->bsm_pubPolygonMask!=NULL) {
// convert it from bit-packed into byte-packed mask
ConvertBitsToBytes(
lm_pbsmShadowMap->bsm_pubPolygonMask,
lm_pubPolygonMask,
lm_mmtPolygonMask.mmt_slTotalSize);
} else {
UBYTE *pub = lm_pubPolygonMask;
// for each mip-map
for (INDEX iMipmap=0; iMipmap<lm_mmtPolygonMask.mmt_ctMipmaps; iMipmap++) {
//UBYTE *pubForSaving = pub;
// start at the first pixel
FLOAT3D vRow = lm_vO+(lm_vStepU+lm_vStepV)*(FLOAT(1<<iMipmap)/2.0f);
// for each pixel in the shadow map
for (PIX pixV=0; pixV<lm_pixSizeV>>iMipmap; pixV++) {
FLOAT3D vPoint = vRow;
for (PIX pixU=0; pixU<lm_pixSizeU>>iMipmap; pixU++) {
// if the point is in the polygon
if (TestPointInPolygon(*lm_pbpoPolygon, vPoint)) {
// set the pixel
*pub = 255;
// if the point is not in the polygon
} else {
// clear the pixel
*pub = 0;
}
// go to the next pixel
pub++;
vPoint+=lm_vStepU*FLOAT(1<<iMipmap);
}
vRow+=lm_vStepV*FLOAT(1<<iMipmap);
}
}
// make mip maps of the polygon mask
// MakeMipmapsForMask(lm_pubPolygonMask, lm_pixSizeU, lm_pixSizeV,
// lm_mmtPolygonMask.mmt_slTotalSize);
// convert it from byte-packed into bit-packed mask
lm_pbsmShadowMap->bsm_pubPolygonMask = (UBYTE *)AllocMemory((lm_mmtPolygonMask.mmt_slTotalSize+7)/8);
ConvertBytesToBits(
lm_pubPolygonMask,
lm_pbsmShadowMap->bsm_pubPolygonMask,
lm_mmtPolygonMask.mmt_slTotalSize);
}
}
// flip shadow mask around V axis (for parallel lights)
void CLayerMaker::FlipShadowMask(INDEX iMip)
{
//PIX pixLayerMinU = lm_pixLayerMinU>>iMip;
//PIX pixLayerMinV = lm_pixLayerMinV>>iMip;
PIX pixLayerSizeU = lm_pixLayerSizeU>>iMip;
PIX pixLayerSizeV = lm_pixLayerSizeV>>iMip;
UBYTE *pubLayer = lm_pubLayer+lm_mmtLayer.mmt_aslOffsets[iMip];
UBYTE *pubRow = pubLayer;
// for each row
for (PIX pixV=0; pixV<pixLayerSizeV; pixV++) {
// flip the row
UBYTE *pubLt = pubRow;
UBYTE *pubRt = pubRow+pixLayerSizeU-1;
for (PIX pixU=0; pixU<pixLayerSizeU/2; pixU++) {
Swap(*pubLt, *pubRt);
pubLt++;
pubRt--;
}
pubRow+=pixLayerSizeU;
}
}
// make shadow mask for the light
ULONG CLayerMaker::MakeShadowMask(CBrushShadowLayer *pbsl)
{
// if the light doesn't cast shadows, or the polygon does not receive them
if (!(pbsl->bsl_plsLightSource->ls_ulFlags&LSF_CASTSHADOWS) ||
(lm_pbpoPolygon->bpo_ulFlags&BPOF_DOESNOTRECEIVESHADOW) ) {
// do nothing
return BSLF_ALLLIGHT;
}
// remember current layer and its light source
lm_plsLight = pbsl->bsl_plsLightSource;
lm_pbslLayer = pbsl;
lm_vLight = lm_plsLight->ls_penEntity->GetPlacement().pl_PositionVector;
// find the influenced rectangle
CLightRectangle lr;
lm_pbsmShadowMap->FindLightRectangle(*lm_plsLight, lr);
ASSERT(lr.lr_pixSizeU == lm_pbslLayer->bsl_pixSizeU);
ASSERT(lr.lr_pixSizeV == lm_pbslLayer->bsl_pixSizeV);
lm_fpixHotU = lr.lr_fpixHotU;
lm_fpixHotV = lr.lr_fpixHotV;
lm_fLightPlaneDistance = lr.lr_fLightPlaneDistance;
lm_pixLayerMinU = lr.lr_pixMinU;
lm_pixLayerMinV = lr.lr_pixMinV;
lm_pixLayerSizeU= lr.lr_pixSizeU;
lm_pixLayerSizeV= lr.lr_pixSizeV;
// find mip-mapping information for the rectangle
MakeMipmapTable(lm_pixLayerSizeU, lm_pixLayerSizeV, lm_mmtLayer);
ASSERT(lr.lr_pixSizeU == lm_pbslLayer->bsl_pixSizeU);
ASSERT(lr.lr_pixSizeV == lm_pbslLayer->bsl_pixSizeV);
ASSERT(lr.lr_pixSizeU <= lm_pixSizeU);
ASSERT(lr.lr_pixSizeV <= lm_pixSizeV);
// if there is no influence, do nothing
if ((lr.lr_pixSizeU==0) || (lr.lr_pixSizeV==0)) return BSLF_ALLDARK;
lm_pbslLayer->bsl_pixMinU = lr.lr_pixMinU;
lm_pbslLayer->bsl_pixMinV = lr.lr_pixMinV;
lm_pbslLayer->bsl_pixSizeU = lr.lr_pixSizeU;
lm_pbslLayer->bsl_pixSizeV = lr.lr_pixSizeV;
lm_pbslLayer->bsl_slSizeInPixels = lm_mmtLayer.mmt_slTotalSize;
// allocate shadow mask for the light (+8 is safety wall for fast conversions)
lm_pubLayer = (UBYTE *)AllocMemory(lm_mmtLayer.mmt_slTotalSize+8);
//const FLOAT fEpsilon = (1<<lm_iMipLevel)/1024.0f;
ULONG ulLighted=BSLF_ALLLIGHT|BSLF_ALLDARK;
// if this polygon requires exact shadows
if (lm_pbpoPolygon->bpo_ulFlags & BPOF_ACCURATESHADOWS) {
// make each mip-map of mask for itself
for(INDEX iMip=0; iMip<lm_mmtLayer.mmt_ctMipmaps; iMip++) {
ulLighted&=MakeOneShadowMaskMip(iMip);
}
} else {
// make first mip-map of mask
ulLighted&=MakeOneShadowMaskMip(0);
// make other shadow mask mips from the first one
MakeMipmapsForMask( lm_pubLayer, lm_mmtLayer.mmt_pixU, lm_mmtLayer.mmt_pixV,
lm_mmtLayer.mmt_slTotalSize);
}
// spread the shadow mask towards pixels outside of polygon
if( !(lm_pbpoPolygon->bpo_ulFlags&BPOF_DARKCORNERS)) {
SpreadShadowMaskOutwards();
} else {
SpreadShadowMaskInwards();
SpreadShadowMaskOutwards();
}
// convert the shadow mask from byte-packed into bit-packed mask
ConvertBytesToBits(lm_pubLayer, lm_pubLayer, lm_mmtLayer.mmt_slTotalSize);
ShrinkMemory((void **)&lm_pubLayer, (lm_mmtLayer.mmt_slTotalSize+7)/8);
pbsl->bsl_pubLayer = lm_pubLayer;
// update statistics
_ctShadowLayers++;
_ctShadowClusters+=lm_mmtLayer.mmt_slTotalSize;
return ulLighted;
}
ULONG CLayerMaker::MakeOneShadowMaskMip(INDEX iMip)
{
ULONG ulLighted=BSLF_ALLLIGHT|BSLF_ALLDARK;
PIX pixLayerMinU = lm_pixLayerMinU>>iMip;
PIX pixLayerMinV = lm_pixLayerMinV>>iMip;
PIX pixLayerSizeU = lm_pixLayerSizeU>>iMip;
PIX pixLayerSizeV = lm_pixLayerSizeV>>iMip;
INDEX iMipLevel = lm_iMipLevel+iMip;
FLOAT3D vO = lm_vO+(lm_vStepU+lm_vStepV)*(FLOAT(1<<iMip)/2.0f);
FLOAT3D vStepU = lm_vStepU*FLOAT(1<<iMip);
FLOAT3D vStepV = lm_vStepV*FLOAT(1<<iMip);
FLOAT fpixHotU = lm_fpixHotU/FLOAT(1<<iMip);
FLOAT fpixHotV = lm_fpixHotV/FLOAT(1<<iMip);
UBYTE *pubLayer = lm_pubLayer+lm_mmtLayer.mmt_aslOffsets[iMip];
// if the light is directional
if (lm_plsLight->ls_ulFlags&LSF_DIRECTIONAL) {
// prepare parallel projection as if viewing from polygon and the shadow map is screen
CParallelProjection3D prProjection;
prProjection.ScreenBBoxL() = FLOATaabbox2D(
FLOAT2D(pixLayerMinU,
pixLayerMinV),
FLOAT2D(pixLayerMinU+pixLayerSizeU,
pixLayerMinV+pixLayerSizeV)
);
prProjection.AspectRatioL() = 1.0f;
prProjection.NearClipDistanceL() = 0.00f;
prProjection.pr_vZoomFactors(1) =
prProjection.pr_vZoomFactors(2) = 1024.0f/(1<<iMipLevel);
FLOAT3D vDirection;
AnglesToDirectionVector(
lm_plsLight->ls_penEntity->GetPlacement().pl_OrientationAngle,
vDirection);
// if polygon is turned away from the light
if ((vDirection%(const FLOAT3D &)lm_pbpoPolygon->bpo_pbplPlane->bpl_plAbsolute)>-0.001) {
// layer is all dark
return BSLF_ALLDARK;
}
vDirection = vDirection*lm_mToInverseMapping;
prProjection.pr_vStepFactors(1) = -vDirection(1)/vDirection(3);
prProjection.pr_vStepFactors(2) = -vDirection(2)/vDirection(3);
prProjection.pr_vStepFactors(1)*=prProjection.pr_vZoomFactors(1);
prProjection.pr_vStepFactors(2)*=prProjection.pr_vZoomFactors(2);
CPlacement3D plCenter;
plCenter.pl_OrientationAngle = lm_aInverseMappingOrientation;
plCenter.pl_PositionVector =
vO
+vStepU*(FLOAT(pixLayerSizeU)/2-0.5f) // !!!!
+vStepV*(FLOAT(pixLayerSizeV)/2);//+5.0f);
prProjection.ViewerPlacementL() = plCenter;
// render the view to the shadow layer (but ignore the target polygon)
CAnyProjection3D apr;
apr = prProjection;
ULONG ulFlagsBefore = lm_pbpoPolygon->bpo_ulFlags;
lm_pbpoPolygon->bpo_ulFlags |= BPOF_INVISIBLE;
ulLighted&=RenderShadows(*lm_pwoWorld, *(CEntity*)NULL, apr,
lm_pbpoPolygon->bpo_boxBoundingBox, pubLayer, pixLayerSizeU, pixLayerSizeV,
lm_plsLight->ls_ubPolygonalMask);
lm_pbpoPolygon->bpo_ulFlags = ulFlagsBefore;
// flip the shadow mask around v axis (left-right)
FlipShadowMask(iMip);
// if the light is point
} else {
// prepare perspective projection as if viewing from light and the shadow map is screen
CPerspectiveProjection3D prProjection;
if( !(lm_pbpoPolygon->bpo_ulFlags&BPOF_DARKCORNERS)) {
prProjection.ScreenBBoxL() = FLOATaabbox2D(
FLOAT2D(pixLayerMinU-fpixHotU+1,
pixLayerMinV-fpixHotV+1),
FLOAT2D(pixLayerMinU+pixLayerSizeU-fpixHotU+1,
pixLayerMinV+pixLayerSizeV-fpixHotV+1)
);
} else {
prProjection.ScreenBBoxL() = FLOATaabbox2D(
FLOAT2D(pixLayerMinU-fpixHotU,
pixLayerMinV-fpixHotV),
FLOAT2D(pixLayerMinU+pixLayerSizeU-fpixHotU,
pixLayerMinV+pixLayerSizeV-fpixHotV)
);
}
prProjection.AspectRatioL() = 1.0f;
prProjection.NearClipDistanceL() = lm_plsLight->ls_fNearClipDistance;
prProjection.FarClipDistanceL()
= lm_fLightPlaneDistance-lm_plsLight->ls_fFarClipDistance; //-fEpsilon/2; !!!! use minimal epsilon for polygon
prProjection.ppr_fMetersPerPixel = (1<<iMipLevel)/1024.0f;
prProjection.ppr_fViewerDistance = lm_fLightPlaneDistance;
CPlacement3D plLight;
plLight.pl_OrientationAngle = lm_aMappingOrientation;
plLight.pl_PositionVector = lm_vLight;
prProjection.ViewerPlacementL() = plLight;
CAnyProjection3D apr;
apr = prProjection;
// ignore the target polygon during rendering
ULONG ulFlagsBefore = lm_pbpoPolygon->bpo_ulFlags;
lm_pbpoPolygon->bpo_ulFlags |= BPOF_INVISIBLE;
// if light is not illumination light
if (lm_plsLight->ls_ubPolygonalMask==0) {
// just render starting at the light entity position
ulLighted&=RenderShadows(*lm_pwoWorld, *lm_plsLight->ls_penEntity,
apr, FLOATaabbox3D(),
pubLayer, pixLayerSizeU, pixLayerSizeV,
lm_plsLight->ls_ubPolygonalMask);
// if light is illumination light
} else {
// add entire box around target polygon and light position to rendering
FLOATaabbox3D box = lm_pbpoPolygon->bpo_boxBoundingBox;
box|=lm_plsLight->ls_penEntity->GetPlacement().pl_PositionVector;
ulLighted&=RenderShadows(*lm_pwoWorld, *(CEntity*)NULL, apr, box,
pubLayer, pixLayerSizeU, pixLayerSizeV,
lm_plsLight->ls_ubPolygonalMask);
}
lm_pbpoPolygon->bpo_ulFlags = ulFlagsBefore;
}
return ulLighted;
}
/*
* Create a shadow map for a given polygon.
*/
BOOL CLayerMaker::CreateLayers(CBrushPolygon &bpo, CWorld &woWorld, BOOL bDoDirectionalLights)
{
// __pfWorldEditingProfile.IncrementAveragingCounter();
// __pfWorldEditingProfile.StartTimer(CWorldEditingProfile::PTI_MAKESHADOWS);
BOOL bInitialized = FALSE;
BOOL bCalculatedSome = FALSE;
BOOL bSomeAreUncalculated = FALSE;
// remember the world
lm_pwoWorld = &woWorld;
lm_pbsmShadowMap = &bpo.bpo_smShadowMap;
lm_pbpoPolygon = &bpo;
// for each layer that should be calculated, but isn't
FORDELETELIST(CBrushShadowLayer, bsl_lnInShadowMap, lm_pbsmShadowMap->bsm_lhLayers, itbsl) {
// if already calculated, or dynamic
if (itbsl->bsl_ulFlags&BSLF_CALCULATED ||
itbsl->bsl_plsLightSource->ls_ulFlags&LSF_DYNAMIC) {
// skip it
continue;
}
// if we are not doing directional lights and it is directional
if (!bDoDirectionalLights
&& (itbsl->bsl_plsLightSource->ls_ulFlags&LSF_DIRECTIONAL)) {
// skip it
bSomeAreUncalculated = TRUE;
continue;
}
// if not yet initialized
if( !bInitialized) {
// remember general data
CalculateData();
// make bit-packed mask of where the polygon is in the shadow map
MakePolygonMask();
bInitialized = TRUE;
}
CBrushShadowLayer &bsl = *itbsl;
// mark the layer is calculated
bsl.bsl_ulFlags |= BSLF_CALCULATED;
// make shadow mask for the light
ULONG ulLighted=MakeShadowMask(itbsl);
ASSERT((ulLighted==0) || (ulLighted==BSLF_ALLLIGHT) || (ulLighted==BSLF_ALLDARK));
bsl.bsl_ulFlags &= ~(BSLF_ALLLIGHT|BSLF_ALLDARK);
bsl.bsl_ulFlags |= ulLighted;
// if the layer is not needed
if( ulLighted&(BSLF_ALLLIGHT|BSLF_ALLDARK)) {
// free it
if( bsl.bsl_pubLayer!=NULL) FreeMemory( bsl.bsl_pubLayer);
bsl.bsl_pubLayer = NULL;
}
bCalculatedSome = TRUE;
}
// if was intialized
if( bInitialized) {
// free bit-packed polygon mask
FreeMemory( lm_pubPolygonMask);
}
// if some new layers have been calculated
if( bCalculatedSome) {
// invalidate mixed layers
bpo.bpo_smShadowMap.Invalidate();
}
return bSomeAreUncalculated;
}
/*
* Create shadow map for the polygon.
*/
void CBrushPolygon::MakeShadowMap(CWorld *pwoWorld, BOOL bDoDirectionalLights)
{
_pfWorldEditingProfile.StartTimer(CWorldEditingProfile::PTI_MAKESHADOWMAP);
// create new shadow map
CLayerMaker lmMaker;
BOOL bSomeAreUncalculated = lmMaker.CreateLayers(*this, *pwoWorld, bDoDirectionalLights);
// unqueue the shadow map
if (!bSomeAreUncalculated && bpo_smShadowMap.bsm_lnInUncalculatedShadowMaps.IsLinked()) {
bpo_smShadowMap.bsm_lnInUncalculatedShadowMaps.Remove();
}
_pfWorldEditingProfile.StopTimer(CWorldEditingProfile::PTI_MAKESHADOWMAP);
}
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