void CodeWriter::writePushPop(VmCommandType cmd, string segment, int index)
{
if (cmd == VmCommandType::C_PUSH)
writePush(segment, index);
else
writePop(segment, index);
}
bool
FltExportVisitor::complete( const osg::Node& node )
{
// Always write final pop level
writePop();
// Done writing records, close the record data temp file.
_recordsStr.close();
// Write OpenFlight file front matter: header, vertex palette, etc.
writeHeader( node.getName() );
writeColorPalette();
_materialPalette->write( _dos );
_texturePalette->write( _dos );
_lightSourcePalette->write( _dos );
_vertexPalette->write( _dos );
// Write Comment ancillary record and specify the _dos DataOutputStream.
writeComment( node, &_dos );
// Copy record data temp file into final OpenFlight file.
// Yee-uck. TBD need better stream copy routine.
char buf;
std::ifstream recIn;
recIn.open( _recordsTempName.c_str(), std::ios::in | std::ios::binary );
while (!recIn.eof() )
{
recIn.read( &buf, 1 );
if (recIn.good())
_dos << buf;
}
recIn.close();
return true;
}
void
FltExportVisitor::handleDrawElements( const osg::DrawElements* de, const osg::Geometry& geom, const osg::Geode& geode )
{
GLenum mode = de->getMode();
int n( 0 );
bool useMesh( false );
switch( mode )
{
case GL_TRIANGLE_STRIP:
case GL_TRIANGLE_FAN:
case GL_QUAD_STRIP:
n = de->getNumIndices();
useMesh = true;
break;
case GL_POINTS:
n = 1;
break;
case GL_LINES:
n = 2;
break;
case GL_TRIANGLES:
n = 3;
break;
case GL_QUADS:
n = 4;
break;
case GL_LINE_STRIP:
case GL_LINE_LOOP:
case GL_POLYGON:
default:
n = de->getNumIndices();
break;
}
// Push and pop subfaces if polygon offset is on.
SubfaceHelper subface( *this, getCurrentStateSet() );
if (useMesh)
{
std::vector< unsigned int > indices;
int idx;
for (idx=0; idx<n; idx++)
indices.push_back( de->index( idx ) );
writeMeshPrimitive( indices, mode );
}
else
{
unsigned int first( 0 );
while (first+n <= de->getNumIndices())
{
// Need:
// * Geode for record name (but also need to handle
// multi Geometry objects and multi PrimitiveSet objects;
// all Face records can't have the same name).
// * Mode
writeFace( geode, geom, mode );
writeMatrix( geode.getUserData() );
writeComment( geode );
writeMultitexture( geom );
writePush();
// Write vertex list records.
std::vector<unsigned int> indices;
int idx;
for(idx=0; idx<n; idx++)
indices.push_back( de->index( first+idx ) );
int numVerts = writeVertexList( indices, n );
first += n;
writeUVList( numVerts, geom );
writePop();
}
}
}
void
FltExportVisitor::handleDrawArrayLengths( const osg::DrawArrayLengths* dal, const osg::Geometry& geom, const osg::Geode& geode )
{
GLint first = dal->getFirst();
GLenum mode = dal->getMode();
int n( 0 );
bool useMesh( false );
switch( mode )
{
case GL_TRIANGLE_STRIP:
case GL_TRIANGLE_FAN:
case GL_QUAD_STRIP:
useMesh = true;
break;
case GL_POINTS:
n = 1;
break;
case GL_LINES:
n = 2;
break;
case GL_TRIANGLES:
n = 3;
break;
case GL_QUADS:
n = 4;
break;
case GL_LINE_STRIP:
case GL_LINE_LOOP:
case GL_POLYGON:
default:
break;
}
// Push and pop subfaces if polygon offset is on.
SubfaceHelper subface( *this, getCurrentStateSet() );
if (useMesh)
{
int idx( 0 );
for( osg::DrawArrayLengths::const_iterator itr=dal->begin();
itr!=dal->end(); itr++ )
{
std::vector< unsigned int > indices;
int jdx;
for (jdx=0; jdx<(*itr); idx++, jdx++)
indices.push_back( idx );
writeMeshPrimitive( indices, mode );
}
}
else
{
// Hm. You wouldn't usually use DrawArrayLengths for non-strip/fan prims...
for( osg::DrawArrayLengths::const_iterator itr=dal->begin();
itr!=dal->end(); itr++ )
{
while (first+n <= *itr)
{
writeFace( geode, geom, mode );
writeMatrix( geode.getUserData() );
writeComment( geode );
writeMultitexture( geom );
writePush();
// Write vertex list records.
int numVerts;
if (n == 0)
{
numVerts = writeVertexList( first, *itr );
first += *itr;
}
else
{
numVerts = writeVertexList( first, n );
first += n;
}
writeUVList( numVerts, geom );
writePop();
}
first += *itr;
}
}
}
void
FltExportVisitor::handleDrawArrays( const osg::DrawArrays* da, const osg::Geometry& geom, const osg::Geode& geode )
{
GLint first = da->getFirst();
GLsizei count = da->getCount();
GLenum mode = da->getMode();
int n( 0 );
bool useMesh( false );
switch( mode )
{
case GL_TRIANGLE_STRIP:
case GL_TRIANGLE_FAN:
case GL_QUAD_STRIP:
useMesh = true;
break;
case GL_POINTS:
n = 1;
break;
case GL_LINES:
n = 2;
break;
case GL_TRIANGLES:
n = 3;
break;
case GL_QUADS:
n = 4;
break;
case GL_LINE_STRIP:
case GL_LINE_LOOP:
case GL_POLYGON:
default:
n = count;
break;
}
if (useMesh)
{
std::vector< unsigned int > indices;
int jdx;
for (jdx=0; jdx<count; jdx++)
indices.push_back( first+jdx );
writeMeshPrimitive( indices, mode );
}
else
{
const unsigned int max( first+count );
while ((unsigned int)( first+n ) <= max)
{
writeFace( geode, geom, mode );
writeMatrix( geode.getUserData() );
writeComment( geode );
writeMultitexture( geom );
writePush();
// Write vertex list records.
int numVerts = writeVertexList( first, n );
first += n;
writeUVList( numVerts, geom );
writePop();
}
}
}
void
FltExportVisitor::writeLightPoint(const osgSim::LightPointNode *lpn)
{
enum Directionality
{
OMNIDIRECTIONAL = 0,
UNIDIRECTIONAL = 1,
BIDIRECTIONAL = 2
};
enum DisplayMode
{
RASTER = 0,
CALLIG = 1,
EITHER = 2
};
enum Modes
{
ENABLE = 0,
DISABLE = 1
};
enum Flags
{
NO_BACK_COLOR = 0x80000000u >> 1,
CALLIGRAPHIC = 0x80000000u >> 3,
REFLECTIVE = 0x80000000u >> 4,
PERSPECTIVE = 0x80000000u >> 8,
FLASHING = 0x80000000u >> 9,
ROTATING = 0x80000000u >> 10,
ROTATE_CC = 0x80000000u >> 11,
VISIBLE_DAY = 0x80000000u >> 15,
VISIBLE_DUSK = 0x80000000u >> 16,
VISIBLE_NIGHT = 0x80000000u >> 17
};
int32 flags(NO_BACK_COLOR);
if (lpn->getNumLightPoints() == 0)
return;
// In OSG, each LightPoint within a LightPointNode can have different appearance
// parameters, but in OpenFlight, a Light Point Record contains a list of homogeneous
// vertices. To be correct, we'd have to look at all LightPoints in the LightPointNode
// and spew out multiple FLT records for each group that shared common appearance
// parameters. Instead, we cheat: We take the first LightPoint and use its appearance
// parameters for all LightPoints in the LightPointNode.
const osgSim::LightPoint &lp0 = lpn->getLightPoint(0);
// No really good mapping between OSG and FLT light point animations.
float32 animPeriod(0.f);
float32 animEnabled(0.f);
float32 animPhaseDelay(0.f);
if (lp0._blinkSequence != NULL)
{
flags |= FLASHING;
animPeriod = 4.f;
animEnabled = 2.f;
animPhaseDelay = lp0._blinkSequence->getPhaseShift();
}
// Note that true bidirectional light points are currently unsupported (they are unavailable
// in OSG, so we never write them out to FLT as BIDIRECTIONAL.
int32 directionality(OMNIDIRECTIONAL);
float32 horizLobe(360.f);
float32 vertLobe(360.f);
float32 lobeRoll(0.f);
const osgSim::DirectionalSector *ds = dynamic_cast<osgSim::DirectionalSector*>(lp0._sector.get());
if (ds)
{
directionality = UNIDIRECTIONAL;
horizLobe = osg::RadiansToDegrees(ds->getHorizLobeAngle());
vertLobe = osg::RadiansToDegrees(ds->getVertLobeAngle());
lobeRoll = osg::RadiansToDegrees(ds->getLobeRollAngle());
}
{
// Braces req'd to invoke idHelper destructor (and potentially
// write LongID record) before Push Record.
const uint16 length(156);
IdHelper id(*this, lpn->getName());
_records->writeInt16((int16) LIGHT_POINT_OP);
_records->writeInt16(length);
_records->writeID(id);
_records->writeInt16(0); // Surface material code
_records->writeInt16(0); // Feature ID
_records->writeUInt32(~0u); // OpenFlight erronously say -1, so will assume ~0u is OK. Back color for bidirectional
_records->writeInt32(EITHER); // Display mode
_records->writeFloat32(lp0._intensity); // Intensity
_records->writeFloat32(0.f); // Back intensity TBD
_records->writeFloat32(0.f); // min defocus
_records->writeFloat32(0.f); // max defocus
_records->writeInt32(DISABLE); // Fading mode
_records->writeInt32(DISABLE); // Fog punch mode
_records->writeInt32(DISABLE); // Directional mode
_records->writeInt32(0); // Range mode
_records->writeFloat32(lpn->getMinPixelSize()); // min pixel size
_records->writeFloat32(lpn->getMaxPixelSize()); // max pixel size
_records->writeFloat32(lp0._radius * 2.f); // Actual size
_records->writeFloat32(1.f); // transparent falloff pixel size
_records->writeFloat32(1.f); // Transparent falloff exponent
_records->writeFloat32(1.f); // Transparent falloff scalar
_records->writeFloat32(0.f); // Transparent falloff clamp
_records->writeFloat32(1.f); // Fog scalar
_records->writeFloat32(0.f); // Reserved
_records->writeFloat32(0.f); // Size difference threshold
_records->writeInt32(directionality); // Directionality
_records->writeFloat32(horizLobe); // Horizontal lobe angle
_records->writeFloat32(vertLobe); // Vertical lobe angle
_records->writeFloat32(lobeRoll); // Lobe roll angle
_records->writeFloat32(0.f); // Directional falloff exponent
_records->writeFloat32(0.f); // Directional ambient intensity
_records->writeFloat32(animPeriod); // Animation period in seconds
_records->writeFloat32(animPhaseDelay); // Animation phase delay in seconds
_records->writeFloat32(animEnabled); // Animation enabled period in seconds
_records->writeFloat32(1.f); // Significance
_records->writeInt32(0); // Calligraphic draw order
_records->writeInt32(flags); // Flags
_records->writeVec3f(osg::Vec3f(0.f, 0.f, 0.f)); // Axis of rotation
}
{
osg::ref_ptr<osg::Vec3dArray> v = new osg::Vec3dArray(lpn->getNumLightPoints());
osg::ref_ptr<osg::Vec4Array> c = new osg::Vec4Array(lpn->getNumLightPoints());
osg::ref_ptr<osg::Vec3Array> n = new osg::Vec3Array(lpn->getNumLightPoints());
osg::Vec3f normal(0.f, 0.f, 1.f);
unsigned int idx;
for (idx = 0; idx < lpn->getNumLightPoints(); idx++)
{
const osgSim::LightPoint &lp = lpn->getLightPoint(idx);
(*v)[idx] = lp._position;
(*c)[idx] = lp._color;
const osgSim::DirectionalSector *ds = dynamic_cast<osgSim::DirectionalSector*>(lp._sector.get());
if (ds)
normal = ds->getDirection();
(*n)[idx] = normal;
}
_vertexPalette->add((const osg::Array*)NULL, v.get(), c.get(), n.get(), NULL, true, true, false);
}
writeMatrix(lpn->getUserData());
writeComment(*lpn);
writePush();
writeVertexList(0, lpn->getNumLightPoints());
writePop();
}
// Billboards also go through this code. The Geode is passed
// to writeFace and writeMesh. If those methods successfully cast
// the Geode to a Billboard, then they set the template mode
// bit accordingly.
void
FltExportVisitor::apply( osg::Geode& node )
{
_firstNode = false;
ScopedStatePushPop guard( this, node.getStateSet() );
unsigned int idx;
for (idx=0; idx<node.getNumDrawables(); idx++)
{
osg::Geometry* geom = node.getDrawable( idx )->asGeometry();
if (!geom)
{
std::string warning( "fltexp: Non-Geometry Drawable encountered. Ignoring." );
osg::notify( osg::WARN ) << warning << std::endl;
_fltOpt->getWriteResult().warn( warning );
continue;
}
ScopedStatePushPop drawableGuard( this, geom->getStateSet() );
// Push and pop subfaces if polygon offset is on.
SubfaceHelper subface( *this, getCurrentStateSet() );
if (atLeastOneFace( *geom ))
{
// If at least one record will be a Face record, then we
// need to write to the vertex palette.
_vertexPalette->add( *geom );
// Iterate over all PrimitiveSets and output Face records.
unsigned int jdx;
for (jdx=0; jdx < geom->getNumPrimitiveSets(); jdx++)
{
osg::PrimitiveSet* prim = geom->getPrimitiveSet( jdx );
if ( isMesh( prim->getMode() ) )
continue;
if (prim->getType() == osg::PrimitiveSet::DrawArraysPrimitiveType)
handleDrawArrays( dynamic_cast<osg::DrawArrays*>( prim ), *geom, node );
else if (prim->getType() == osg::PrimitiveSet::DrawArrayLengthsPrimitiveType)
handleDrawArrayLengths( dynamic_cast<osg::DrawArrayLengths*>( prim ), *geom, node );
else if ( (prim->getType() == osg::PrimitiveSet::DrawElementsUBytePrimitiveType) ||
(prim->getType() == osg::PrimitiveSet::DrawElementsUShortPrimitiveType) ||
(prim->getType() == osg::PrimitiveSet::DrawElementsUIntPrimitiveType) )
handleDrawElements( dynamic_cast<osg::DrawElements*>( prim ), *geom, node );
else
{
std::string warning( "fltexp: Unknown PrimitiveSet type." );
osg::notify( osg::WARN ) << warning << std::endl;
_fltOpt->getWriteResult().warn( warning );
return;
}
}
}
if (atLeastOneMesh( *geom ))
{
// If at least one Mesh record, write out preamble mesh records
// followed by a Mesh Primitive record per PrimitiveSet.
writeMesh( node, *geom );
writeMatrix( node.getUserData() );
writeComment( node );
writeMultitexture( *geom );
writeLocalVertexPool( *geom );
writePush();
unsigned int jdx;
for (jdx=0; jdx < geom->getNumPrimitiveSets(); jdx++)
{
osg::PrimitiveSet* prim = geom->getPrimitiveSet( jdx );
if ( !isMesh( prim->getMode() ) )
continue;
if (prim->getType() == osg::PrimitiveSet::DrawArraysPrimitiveType)
handleDrawArrays( dynamic_cast<osg::DrawArrays*>( prim ), *geom, node );
else if (prim->getType() == osg::PrimitiveSet::DrawArrayLengthsPrimitiveType)
handleDrawArrayLengths( dynamic_cast<osg::DrawArrayLengths*>( prim ), *geom, node );
else if ( (prim->getType() == osg::PrimitiveSet::DrawElementsUBytePrimitiveType) ||
(prim->getType() == osg::PrimitiveSet::DrawElementsUShortPrimitiveType) ||
(prim->getType() == osg::PrimitiveSet::DrawElementsUIntPrimitiveType) )
handleDrawElements( dynamic_cast<osg::DrawElements*>( prim ), *geom, node );
else
{
std::string warning( "fltexp: Unknown PrimitiveSet type." );
osg::notify( osg::WARN ) << warning << std::endl;
_fltOpt->getWriteResult().warn( warning );
return;
}
}
writePop();
}
}
// Would traverse here if this node could have children.
// traverse( (osg::Node&)node );
}