void PhysicsVisitor::apply( osg::Geode& node )
{
// retrieve the node mask which is used for physics material and later for other properies
// only the first byte is relevant for pyhsics material description
_attribute = node.getNodeMask() & 0xFF;
// this means no need for building static collision geom
// this is not the same as MAT_NOCOL, as MAT_NOCOL collisions are detected
if ( _attribute == Physics::NO_BUILD )
return;
// get the accumulated world matrix for this node
osg::Matrixf mat = computeLocalToWorld( getNodePath() );
unsigned int numDrawables = node.getNumDrawables();
for ( unsigned int cnt = 0; cnt < numDrawables; ++cnt )
{
osg::Drawable* p_drawable = node.getDrawable( cnt );
osg::Geometry* p_geom = p_drawable->asGeometry();
// evaluate the geom and generate an appropriate collision geometry
if ( p_geom )
{
osg::Array* p_verts = p_geom->getVertexArray();
osg::IndexArray* p_indices = p_geom->getVertexIndices();
unsigned int numPrims = p_geom->getNumPrimitiveSets();
{
for ( unsigned int primcnt = 0; primcnt < numPrims; ++primcnt )
{
osg::PrimitiveSet* p_set = p_geom->getPrimitiveSet( primcnt );
switch( p_set->getMode() )
{
case osg::PrimitiveSet::POINTS:
case osg::PrimitiveSet::LINES:
case osg::PrimitiveSet::LINE_STRIP:
case osg::PrimitiveSet::LINE_LOOP:
return;
case osg::PrimitiveSet::TRIANGLES:
buildTrianlges( p_set, p_verts, mat, p_indices );
break;
case osg::PrimitiveSet::TRIANGLE_STRIP:
buildTrianlgeStrip( p_set, p_verts, mat, p_indices );
break;
case osg::PrimitiveSet::TRIANGLE_FAN:
case osg::PrimitiveSet::QUADS:
case osg::PrimitiveSet::QUAD_STRIP:
case osg::PrimitiveSet::POLYGON:
default:
log_error << "Physics Serializer: unsupported primitive set for physics geometry! currently only TRIANGLES and TRIANGLE_STRIP types are supported." << std::endl;
}
}
}
}
}
}
void
FltExportVisitor::writeMesh( const osg::Geode& geode, const osg::Geometry& geom )
{
enum DrawMode
{
SOLID_BACKFACE = 0,
SOLID_NO_BACKFACE = 1,
WIREFRAME_CLOSED = 2,
WIREFRAME_NOT_CLOSED = 3,
SURROUND_ALTERNATE_COLOR = 4,
OMNIDIRECTIONAL_LIGHT = 8,
UNIDIRECTIONAL_LIGHT = 9,
BIDIRECTIONAL_LIGHT = 10
};
enum TemplateMode
{
FIXED_NO_ALPHA_BLENDING = 0,
FIXED_ALPHA_BLENDING = 1,
AXIAL_ROTATE_WITH_ALPHA_BLENDING = 2,
POINT_ROTATE_WITH_ALPHA_BLENDING = 4
};
// const unsigned int TERRAIN_BIT = 0x80000000u >> 0;
//const unsigned int NO_COLOR_BIT = 0x80000000u >> 1;
//const unsigned int NO_ALT_COLOR_BIT = 0x80000000u >> 2;
const unsigned int PACKED_COLOR_BIT = 0x80000000u >> 3;
//const unsigned int FOOTPRINT_BIT = 0x80000000u >> 4; // Terrain culture cutout
const unsigned int HIDDEN_BIT = 0x80000000u >> 5;
//const unsigned int ROOFLINE_BIT = 0x80000000u >> 6;
uint32 flags( PACKED_COLOR_BIT );
if (geode.getNodeMask() == 0)
flags |= HIDDEN_BIT;
enum LightMode
{
FACE_COLOR = 0,
VERTEX_COLOR = 1,
FACE_COLOR_LIGHTING = 2,
VERTEX_COLOR_LIGHTING = 3
};
int8 lightMode;
osg::Vec4 packedColorRaw( 1., 1., 1., 1. );
uint16 transparency( 0 );
if (geom.getColorBinding() == osg::Geometry::BIND_PER_VERTEX)
{
if (isLit( geom ))
lightMode = VERTEX_COLOR_LIGHTING;
else
lightMode = VERTEX_COLOR;
}
else
{
const osg::Vec4Array* c = dynamic_cast<const osg::Vec4Array*>( geom.getColorArray() );
if (c && (c->size() > 0))
{
packedColorRaw = (*c)[0];
transparency = flt::uint16((1. - packedColorRaw[3]) * (double)0xffff);
}
if (isLit( geom ))
lightMode = FACE_COLOR_LIGHTING;
else
lightMode = FACE_COLOR;
}
uint32 packedColor;
packedColor = (int)(packedColorRaw[3]*255) << 24 |
(int)(packedColorRaw[2]*255) << 16 | (int)(packedColorRaw[1]*255) << 8 |
(int)(packedColorRaw[0]*255);
int8 drawType;
osg::StateSet const* ss = getCurrentStateSet();
{
// Default to no facet culling
drawType = SOLID_NO_BACKFACE;
// If facet-culling isn't *dis*abled, check whether the CullFace mode is BACK
if (ss->getMode(GL_CULL_FACE) & osg::StateAttribute::ON)
{
osg::CullFace const* cullFace = static_cast<osg::CullFace const*>(
ss->getAttribute(osg::StateAttribute::CULLFACE) );
if( cullFace->getMode() == osg::CullFace::BACK )
drawType = SOLID_BACKFACE;
// Note: OpenFlt can't handle FRONT or FRONT_AND_BACK settings, so ignore these(??)
}
}
// Determine the material properties for the face
int16 materialIndex( -1 );
if (isLit( geom ))
{
osg::Material const* currMaterial = static_cast<osg::Material const*>(
ss->getAttribute(osg::StateAttribute::MATERIAL) );
materialIndex = _materialPalette->add(currMaterial);
}
// Get base texture
int16 textureIndex( -1 );
if (isTextured( 0, geom ))
{
const osg::Texture2D* texture = static_cast<const osg::Texture2D*>(
ss->getTextureAttribute( 0, osg::StateAttribute::TEXTURE ) );
if (texture != NULL)
textureIndex = _texturePalette->add( 0, texture );
else
{
std::string warning( "fltexp: Mesh is textured, but Texture2D StateAttribute is NULL." );
osg::notify( osg::WARN ) << warning << std::endl;
_fltOpt->getWriteResult().warn( warning );
}
}
// Set the appropriate template mode based
// on blending or Billboarding.
TemplateMode templateMode( FIXED_NO_ALPHA_BLENDING );
const osg::Billboard* bb = dynamic_cast< const osg::Billboard* >( &geode );
if (bb != NULL)
{
if( bb->getMode() == osg::Billboard::AXIAL_ROT )
templateMode = AXIAL_ROTATE_WITH_ALPHA_BLENDING;
else
templateMode = POINT_ROTATE_WITH_ALPHA_BLENDING;
}
else if ( ss->getMode( GL_BLEND ) & osg::StateAttribute::ON )
{
const osg::BlendFunc* bf = static_cast<const osg::BlendFunc*>(
ss->getAttribute(osg::StateAttribute::BLENDFUNC) );
if( (bf->getSource() == osg::BlendFunc::SRC_ALPHA) &&
(bf->getDestination() == osg::BlendFunc::ONE_MINUS_SRC_ALPHA) )
templateMode = FIXED_ALPHA_BLENDING;
}
uint16 length( 84 );
IdHelper id( *this, geode.getName() );
_records->writeInt16( (int16) MESH_OP );
_records->writeUInt16( length );
_records->writeID( id );
_records->writeInt32( 0 ); // Reserved
_records->writeInt32( 0 ); // IR color code
_records->writeInt16( 0 ); // Relative priority
_records->writeInt8( drawType ); // Draw type
_records->writeInt8( 0 ); // Texture white
_records->writeInt16( -1 ); // Color name index
_records->writeInt16( -1 ); // Alternate color name index
_records->writeInt8( 0 ); // Reserved
_records->writeInt8( templateMode ); // Template (billboard)
_records->writeInt16( -1 ); // Detail texture pattern index
_records->writeInt16( textureIndex ); // Texture pattern index
_records->writeInt16( materialIndex ); // Material index
_records->writeInt16( 0 ); // Surface material code
_records->writeInt16( 0 ); // Feature ID
_records->writeInt32( 0 ); // IR material code
_records->writeUInt16( transparency ); // Transparency
_records->writeInt8( 0 ); // LOD generation control
_records->writeInt8( 0 ); // Line style index
_records->writeUInt32( flags ); // Flags
_records->writeInt8( lightMode ); // Light mode
_records->writeFill( 7 ); // Reserved
_records->writeUInt32( packedColor ); // Packed color, primary
_records->writeUInt32( 0x00ffffff ); // Packed color, alternate
_records->writeInt16( -1 ); // Texture mapping index
_records->writeInt16( 0 ); // Reserved
_records->writeInt32( -1 ); // Primary color index
_records->writeInt32( -1 ); // Alternate color index
// Next four bytes:
// 15.8: two 2-byte "reserved" fields
// 15.9: one 4-byte "reserved" field
_records->writeInt16( 0 ); // Reserved
_records->writeInt16( -1 ); // Shader index
}