/* Test if an oriented box in view space is inside view frustum. */
INDEX CPerspectiveProjection3D::TestBoxToFrustum(const FLOATobbox3D &box) const
{
ASSERT( pr_Prepared);
INDEX iPass = 1;
INDEX iTest;
// check to near
iTest = (INDEX) box.TestAgainstPlane( FLOATplane3D(FLOAT3D(0,0,-1), pr_NearClipDistance));
if( iTest<0) {
return -1;
} else if( iTest==0) {
iPass = 0;
}
// check to far
if( pr_FarClipDistance>0) {
iTest = (INDEX) box.TestAgainstPlane( FLOATplane3D(FLOAT3D(0,0,1), -pr_FarClipDistance));
if( iTest<0) {
return -1;
} else if( iTest==0) {
iPass = 0;
}
}
// check to left
iTest = (INDEX) box.TestAgainstPlane(pr_plClipL);
if( iTest<0) {
return -1;
} else if( iTest==0) {
iPass = 0;
}
// check to right
iTest = (INDEX) box.TestAgainstPlane(pr_plClipR);
if( iTest<0) {
return -1;
} else if( iTest==0) {
iPass = 0;
}
// check to up
iTest = (INDEX) box.TestAgainstPlane(pr_plClipU);
if( iTest<0) {
return -1;
} else if( iTest==0) {
iPass = 0;
}
// check to down
iTest = (INDEX) box.TestAgainstPlane(pr_plClipD);
if( iTest<0) {
return -1;
} else if( iTest==0) {
iPass = 0;
}
// all done
return iPass;
}
// Create render model structure for rendering an attached model
BOOL CModelObject::CreateAttachment( CRenderModel &rmMain, CAttachmentModelObject &amo)
{
_pfModelProfile.StartTimer( CModelProfile::PTI_CREATEATTACHMENT);
_pfModelProfile.IncrementTimerAveragingCounter( CModelProfile::PTI_CREATEATTACHMENT);
CRenderModel &rmAttached = *amo.amo_prm;
rmAttached.rm_ulFlags = rmMain.rm_ulFlags&(RMF_FOG|RMF_HAZE|RMF_WEAPON) | RMF_ATTACHMENT;
// get the position
rmMain.rm_pmdModelData->md_aampAttachedPosition.Lock();
const CAttachedModelPosition & = rmMain.rm_pmdModelData->md_aampAttachedPosition[amo.amo_iAttachedPosition];
rmMain.rm_pmdModelData->md_aampAttachedPosition.Unlock();
// copy common values
rmAttached.rm_vLightDirection = rmMain.rm_vLightDirection;
rmAttached.rm_fDistanceFactor = rmMain.rm_fDistanceFactor;
rmAttached.rm_colLight = rmMain.rm_colLight;
rmAttached.rm_colAmbient = rmMain.rm_colAmbient;
rmAttached.rm_colBlend = rmMain.rm_colBlend;
// unpack the reference vertices
FLOAT3D vCenter, vFront, vUp;
const INDEX iCenter = amp.amp_iCenterVertex;
const INDEX iFront = amp.amp_iFrontVertex;
const INDEX iUp = amp.amp_iUpVertex;
UnpackVertex( rmMain, iCenter, vCenter);
UnpackVertex( rmMain, iFront, vFront);
UnpackVertex( rmMain, iUp, vUp);
// create front and up direction vectors
FLOAT3D vY = vUp - vCenter;
FLOAT3D vZ = vCenter - vFront;
// project center and directions from object to absolute space
const FLOATmatrix3D &mO2A = rmMain.rm_mObjectRotation;
const FLOAT3D &vO2A = rmMain.rm_vObjectPosition;
vCenter = vCenter*mO2A +vO2A;
vY = vY *mO2A;
vZ = vZ *mO2A;
// make a rotation matrix from the direction vectors
FLOAT3D vX = vY*vZ;
vY = vZ*vX;
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);
// adjust for relative placement of the attachment
FLOAT3D vOffset;
FLOATmatrix3D mRelative;
MakeRotationMatrixFast( mRelative, amo.amo_plRelative.pl_OrientationAngle);
vOffset(1) = amo.amo_plRelative.pl_PositionVector(1) * mo_Stretch(1);
vOffset(2) = amo.amo_plRelative.pl_PositionVector(2) * mo_Stretch(2);
vOffset(3) = amo.amo_plRelative.pl_PositionVector(3) * mo_Stretch(3);
FLOAT3D vO = vCenter + vOffset * mOrientation;
mOrientation *= mRelative; // convert absolute to relative orientation
rmAttached.SetObjectPlacement( vO, mOrientation);
// done here if clipping optimizations are not allowed
extern INDEX gap_iOptimizeClipping;
if( gap_iOptimizeClipping<1) {
gap_iOptimizeClipping = 0;
_pfModelProfile.StopTimer( CModelProfile::PTI_CREATEATTACHMENT);
return TRUE;
}
// test attachment to frustum and/or mirror
FLOAT3D vHandle;
_aprProjection->PreClip( vO, vHandle);
CalculateBoundingBox( &amo.amo_moModelObject, rmAttached);
// compose view-space bounding box and sphere of an attacment
const FLOAT fR = Max( rmAttached.rm_vObjectMinBB.Length(), rmAttached.rm_vObjectMaxBB.Length());
const FLOATobbox3D boxEntity( FLOATaabbox3D(rmAttached.rm_vObjectMinBB, rmAttached.rm_vObjectMaxBB),
vHandle, _aprProjection->pr_ViewerRotationMatrix*mOrientation);
// frustum test?
if( gap_iOptimizeClipping>1) {
// test sphere against frustrum
INDEX iFrustumTest = _aprProjection->TestSphereToFrustum(vHandle,fR);
if( iFrustumTest==0) {
// test box if sphere cut one of frustum planes
iFrustumTest = _aprProjection->TestBoxToFrustum(boxEntity);
}
// mark if attachment is fully inside frustum
if( iFrustumTest>0) rmAttached.rm_ulFlags |= RMF_INSIDE;
else if( iFrustumTest<0) { // if completely outside of frustum
// signal skip rendering only if doesn't have any attachments
_pfModelProfile.StopTimer( CModelProfile::PTI_CREATEATTACHMENT);
return !amo.amo_moModelObject.mo_lhAttachments.IsEmpty();
}
}
// test sphere against mirror/warp plane (if any)
if( _aprProjection->pr_bMirror || _aprProjection->pr_bWarp) {
INDEX iMirrorPlaneTest;
const FLOAT fPlaneDistance = _aprProjection->pr_plMirrorView.PointDistance(vHandle);
if( fPlaneDistance < -fR) iMirrorPlaneTest = -1;
else if( fPlaneDistance > +fR) iMirrorPlaneTest = +1;
else { // test box if sphere cut mirror plane
iMirrorPlaneTest = boxEntity.TestAgainstPlane(_aprProjection->pr_plMirrorView);
}
// mark if attachment is fully inside mirror
if( iMirrorPlaneTest>0) rmAttached.rm_ulFlags |= RMF_INMIRROR;
else if( iMirrorPlaneTest<0) { // if completely outside mirror
// signal skip rendering only if doesn't have any attachments
_pfModelProfile.StopTimer( CModelProfile::PTI_CREATEATTACHMENT);
return !amo.amo_moModelObject.mo_lhAttachments.IsEmpty();
}
}
// all done
_pfModelProfile.StopTimer( CModelProfile::PTI_CREATEATTACHMENT);
return TRUE;
}