// Prepare scene for terrain rendering
void PrepareScene(CAnyProjection3D &apr, CDrawPort *pdp, CTerrain *ptrTerrain)
{
ASSERT(ptrTerrain!=NULL);
ASSERT(ptrTerrain->tr_penEntity!=NULL);
// Set current terrain
_ptrTerrain = ptrTerrain;
// Set drawport
_pdp = pdp;
// Prepare and set the projection
apr->ObjectPlacementL() = CPlacement3D(FLOAT3D(0,0,0), ANGLE3D(0,0,0));
apr->Prepare();
_aprProjection = apr;
_pdp->SetProjection( _aprProjection);
CEntity *pen = ptrTerrain->tr_penEntity;
// calculate projection of viewer in absolute space
const FLOATmatrix3D &mViewer = _aprProjection->pr_ViewerRotationMatrix;
_vViewer(1) = -mViewer(3,1);
_vViewer(2) = -mViewer(3,2);
_vViewer(3) = -mViewer(3,3);
// calculate projection of viewer in object space
_vViewerObj = _vViewer * !pen->en_mRotation;
const CPlacement3D &plTerrain = pen->GetLerpedPlacement();
_mObjectToView = mViewer * pen->en_mRotation;
_vObjectToView = (plTerrain.pl_PositionVector - _aprProjection->pr_vViewerPosition) * mViewer;
// make transform matrix
const FLOATmatrix3D &m = _mObjectToView;
const FLOAT3D &v = _vObjectToView;
FLOAT glm[16];
glm[0] = m(1,1); glm[4] = m(1,2); glm[ 8] = m(1,3); glm[12] = v(1);
glm[1] = m(2,1); glm[5] = m(2,2); glm[ 9] = m(2,3); glm[13] = v(2);
glm[2] = m(3,1); glm[6] = m(3,2); glm[10] = m(3,3); glm[14] = v(3);
glm[3] = 0; glm[7] = 0; glm[11] = 0; glm[15] = 1;
gfxSetViewMatrix(glm);
// Get viewer in absolute space
_vViewerAbs = (_aprProjection->ViewerPlacementR().pl_PositionVector -
pen->en_plPlacement.pl_PositionVector) * !pen->en_mRotation;
gfxDisableBlend();
gfxDisableTexture();
gfxDisableAlphaTest();
gfxEnableDepthTest();
gfxEnableDepthWrite();
gfxCullFace(GFX_BACK);
}
// fill rate benchmark
static DOUBLE FillRatePass(INDEX ct)
{
if( !_pdp->Lock()) {
ASSERT(FALSE);
return 0.0;
}
StartTimer();
_pdp->Fill(C_GRAY|255);
_pdp->FillZBuffer(1.0f);
GFXVertex avtx[4];
avtx[0].x = 0; avtx[0].y = 0; avtx[0].z = 0.5f;
avtx[1].x = 0; avtx[1].y = _pixSizeJ; avtx[1].z = 0.5f;
avtx[2].x = _pixSizeI; avtx[2].y = _pixSizeJ; avtx[2].z = 0.5f;
avtx[3].x = _pixSizeI; avtx[3].y = 0; avtx[3].z = 0.5f;
GFXTexCoord atex[4] = { {0,0}, {0,1}, {1,1}, {1,0} };
GFXColor acol[4] = { 0xFF0000FF, 0xFF00FF00, 0xFFFF0000, 0xFFFF00FF };
INDEX_T aidx[6] = { 0,1,2, 0,2,3};
gfxSetVertexArray( &avtx[0], 4);
gfxSetTexCoordArray( &atex[0], FALSE);
gfxSetColorArray( &acol[0]);
if(_bTexture) {
gfxEnableTexture();
if(_bMultiTexture) {
gfxSetTextureUnit(1);
gfxEnableTexture();
gfxSetTexture( _ulTexObject, _tpLocal);
gfxSetTexCoordArray(atex, FALSE);
gfxSetTextureUnit(0);
}
} else {
gfxDisableTexture();
}
if(_bBlend) {
gfxEnableBlend();
if(_bTexture) {
gfxBlendFunc( GFX_SRC_ALPHA, GFX_INV_SRC_ALPHA);
} else {
gfxBlendFunc( GFX_ONE, GFX_ONE);
}
} else {
gfxDisableBlend();
}
if(_bDepth) {
gfxEnableDepthTest();
gfxEnableDepthWrite();
} else {
gfxDisableDepthTest();
gfxDisableDepthWrite();
}
gfxDisableAlphaTest();
for( INDEX i=0; i<ct; i++) gfxDrawElements( 6, &aidx[0]);
if(_bMultiTexture) {
gfxSetTextureUnit(1);
gfxDisableTexture();
gfxSetTextureUnit(0);
}
_pdp->Unlock();
gfxFinish();
_pvp->SwapBuffers();
return StopTimer();
}
static DOUBLE TrisTroughputPass(INDEX ct)
{
if( !_pdp->Lock()) {
ASSERT(FALSE);
return 0.0;
}
StartTimer();
gfxSetFrustum( -0.5f, +0.5f, -0.5f, +0.5f, 0.5f, 2.0f);
gfxSetViewMatrix(NULL);
gfxCullFace(GFX_NONE);
_pdp->Fill(C_GRAY|255);
_pdp->FillZBuffer(1.0f);
if(_bTexture) {
gfxEnableTexture();
} else {
gfxDisableTexture();
}
if(_bBlend) {
gfxEnableBlend();
gfxBlendFunc( GFX_ONE, GFX_ONE);
} else {
gfxDisableBlend();
}
if(_bDepth) {
gfxEnableDepthTest();
gfxEnableDepthWrite();
} else {
gfxDisableDepthTest();
gfxDisableDepthWrite();
}
gfxDisableAlphaTest();
gfxSetVertexArray( &_avtx[0], _avtx.Count());
gfxLockArrays();
gfxSetTexCoordArray( &_atex[0], FALSE);
gfxSetColorArray( &_acol[0]);
if(_bMultiTexture) {
gfxSetTextureUnit(1);
gfxEnableTexture();
gfxSetTexture( _ulTexObject, _tpLocal);
gfxSetTexCoordArray( &_atex[0], FALSE);
gfxSetTextureUnit(0);
}
for( INDEX i=0; i<ct; i++) gfxDrawElements( _aiElements.Count(), &_aiElements[0]);
gfxUnlockArrays();
if(_bMultiTexture) {
gfxSetTextureUnit(1);
gfxDisableTexture();
gfxSetTextureUnit(0);
}
_pdp->Unlock();
gfxFinish();
_pvp->SwapBuffers();
return StopTimer();
}
// Enable/Disable depth test
void shaEnableDepthTest(void)
{
gfxEnableDepthTest();
}
// read depth buffer and update visibility flag of depth points
static void UpdateDepthPointsVisibility( const CDrawPort *pdp, const INDEX iMirrorLevel,
DepthInfo *pdi, const INDEX ctCount)
{
const GfxAPIType eAPI = _pGfx->gl_eCurrentAPI;
ASSERT(GfxValidApi(eAPI));
ASSERT( pdp!=NULL && ctCount>0);
const CRaster *pra = pdp->dp_Raster;
// OpenGL
if( eAPI==GAT_OGL)
{
_sfStats.StartTimer(CStatForm::STI_GFXAPI);
FLOAT fPointOoK;
// for each stored point
for( INDEX idi=0; idi<ctCount; idi++) {
DepthInfo &di = pdi[idi];
// skip if not in required mirror level or was already checked in this iteration
if( iMirrorLevel!=di.di_iMirrorLevel || _iCheckIteration!=di.di_iSwapLastRequest) continue;
const PIX pixJ = pra->ra_Height-1 - di.di_pixJ; // OpenGL has Y-inversed buffer!
pglReadPixels( di.di_pixI, pixJ, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &fPointOoK);
OGL_CHECKERROR;
// it is visible if there is nothing nearer in z-buffer already
di.di_bVisible = (di.di_fOoK<fPointOoK);
}
// done
_sfStats.StopTimer(CStatForm::STI_GFXAPI);
return;
}
// Direct3D
#ifdef SE1_D3D
if( eAPI==GAT_D3D)
{
_sfStats.StartTimer(CStatForm::STI_GFXAPI);
// ok, this will get really complicated ...
// We'll have to do it thru back buffer because darn DX8 won't let us have values from z-buffer;
// Anyway, we'll lock backbuffer, read color from the lens location and try to write little triangle there
// with slightly modified color. Then we'll readout that color and see if triangle passes z-test. Voila! :)
// P.S. To avoid lock-modify-lock, we need to batch all the locks in one. Uhhhh ... :(
COLOR col;
INDEX idi;
SLONG slColSize;
HRESULT hr;
D3DLOCKED_RECT rectLocked;
D3DSURFACE_DESC surfDesc;
LPDIRECT3DSURFACE8 pBackBuffer;
// fetch back buffer (different for full screen and windowed mode)
const BOOL bFullScreen = _pGfx->gl_ulFlags & GLF_FULLSCREEN;
if( bFullScreen) {
hr = _pGfx->gl_pd3dDevice->GetBackBuffer( 0, D3DBACKBUFFER_TYPE_MONO, &pBackBuffer);
} else {
hr = pra->ra_pvpViewPort->vp_pSwapChain->GetBackBuffer( 0, D3DBACKBUFFER_TYPE_MONO, &pBackBuffer);
}
// what, cannot get a back buffer?
if( hr!=D3D_OK) {
// to hell with it all
_sfStats.StopTimer(CStatForm::STI_GFXAPI);
return;
}
// keep format of back-buffer
pBackBuffer->GetDesc(&surfDesc);
const D3DFORMAT d3dfBack = surfDesc.Format;
// prepare array that'll back-buffer colors from depth point locations
_acolDelayed.Push(ctCount);
// store all colors
for( idi=0; idi<ctCount; idi++) {
DepthInfo &di = pdi[idi];
// skip if not in required mirror level or was already checked in this iteration
if( iMirrorLevel!=di.di_iMirrorLevel || _iCheckIteration!=di.di_iSwapLastRequest) continue;
// fetch pixel
_acolDelayed[idi] = 0;
const RECT rectToLock = { di.di_pixI, di.di_pixJ, di.di_pixI+1, di.di_pixJ+1 };
hr = pBackBuffer->LockRect( &rectLocked, &rectToLock, D3DLOCK_READONLY);
if( hr!=D3D_OK) continue; // skip if lock didn't make it
// read, convert and store original color
_acolDelayed[idi] = UnpackColor_D3D( (UBYTE*)rectLocked.pBits, d3dfBack, slColSize) | CT_OPAQUE;
pBackBuffer->UnlockRect();
}
// prepare to draw little triangles there with slightly adjusted colors
_sfStats.StopTimer(CStatForm::STI_GFXAPI);
gfxEnableDepthTest();
gfxDisableDepthWrite();
gfxDisableBlend();
gfxDisableAlphaTest();
gfxDisableTexture();
_sfStats.StartTimer(CStatForm::STI_GFXAPI);
// prepare array and shader
_avtxDelayed.Push(ctCount*3);
d3dSetVertexShader(D3DFVF_CTVERTEX);
// draw one trianle around each depth point
INDEX ctVertex = 0;
for( idi=0; idi<ctCount; idi++) {
DepthInfo &di = pdi[idi];
col = _acolDelayed[idi];
// skip if not in required mirror level or was already checked in this iteration, or wasn't fetched at all
if( iMirrorLevel!=di.di_iMirrorLevel || _iCheckIteration!=di.di_iSwapLastRequest || col==0) continue;
const ULONG d3dCol = rgba2argb(col^0x20103000);
const PIX pixI = di.di_pixI - pdp->dp_MinI; // convert raster loc to drawport loc
const PIX pixJ = di.di_pixJ - pdp->dp_MinJ;
// batch it and advance to next triangle
CTVERTEX &vtx0 = _avtxDelayed[ctVertex++];
CTVERTEX &vtx1 = _avtxDelayed[ctVertex++];
CTVERTEX &vtx2 = _avtxDelayed[ctVertex++];
vtx0.fX=pixI; vtx0.fY=pixJ-2; vtx0.fZ=di.di_fOoK; vtx0.ulColor=d3dCol; vtx0.fU=vtx0.fV=0;
vtx1.fX=pixI-2; vtx1.fY=pixJ+2; vtx1.fZ=di.di_fOoK; vtx1.ulColor=d3dCol; vtx1.fU=vtx0.fV=0;
vtx2.fX=pixI+2; vtx2.fY=pixJ; vtx2.fZ=di.di_fOoK; vtx2.ulColor=d3dCol; vtx2.fU=vtx0.fV=0;
}
// draw a bunch
hr = _pGfx->gl_pd3dDevice->DrawPrimitiveUP( D3DPT_TRIANGLELIST, ctVertex/3, &_avtxDelayed[0], sizeof(CTVERTEX));
D3D_CHECKERROR(hr);
// readout colors again and compare to old ones
for( idi=0; idi<ctCount; idi++) {
DepthInfo &di = pdi[idi];
col = _acolDelayed[idi];
// skip if not in required mirror level or was already checked in this iteration, or wasn't fetched at all
if( iMirrorLevel!=di.di_iMirrorLevel || _iCheckIteration!=di.di_iSwapLastRequest || col==0) continue;
// fetch pixel
const RECT rectToLock = { di.di_pixI, di.di_pixJ, di.di_pixI+1, di.di_pixJ+1 };
hr = pBackBuffer->LockRect( &rectLocked, &rectToLock, D3DLOCK_READONLY);
if( hr!=D3D_OK) continue; // skip if lock didn't make it
// read new color
const COLOR colNew = UnpackColor_D3D( (UBYTE*)rectLocked.pBits, d3dfBack, slColSize) | CT_OPAQUE;
pBackBuffer->UnlockRect();
// if we managed to write adjusted color, point is visible!
di.di_bVisible = (col!=colNew);
}
// phew, done! :)
D3DRELEASE( pBackBuffer, TRUE);
_acolDelayed.PopAll();
_avtxDelayed.PopAll();
_sfStats.StopTimer(CStatForm::STI_GFXAPI);
return;
}
#endif // SE1_D3D
}
