virtual void addMorphVertex(Vertex& vertex0, Vertex& /*vertex100*/)
{
osg::Vec3Array* vertices = getOrCreateVertexArray(*_geometry);
vertices->push_back(vertex0._coord);
if (isGouraud())
{
osg::Vec4Array* colors = getOrCreateColorArray(*_geometry);
if (vertex0.validColor())
{
colors->push_back(vertex0._color);
}
else
{
// Use face color if vertex color is -1 in a gouraud polygon.
// http://www.multigen-paradigm.com/ubb/Forum1/HTML/000967.html
colors->push_back(_primaryColor);
}
}
if (vertex0.validNormal())
{
osg::Vec3Array* normals = getOrCreateNormalArray(*_geometry);
normals->push_back(vertex0._normal);
}
for (int layer=0; layer<Vertex::MAX_LAYERS; layer++)
{
if (vertex0.validUV(layer))
{
osg::Vec2Array* UVs = getOrCreateTextureArray(*_geometry,layer);
UVs->push_back(vertex0._uv[layer]);
}
}
}
void createFaces(osg::Geometry& geometry, Polyhedron const& polyhedron, unsigned int faceMask = PolyhedronGeometry::All)
{
osgUtil::Tessellator tessellator;
tessellator.setTessellationType(osgUtil::Tessellator::TESS_TYPE_POLYGONS);
tessellator.setWindingType(osgUtil::Tessellator::TESS_WINDING_NONZERO);
auto _vertices = getOrCreateVertexArray(geometry);
auto _normals = getOrCreateNormalArray(geometry);
auto _colors = getOrCreateColorArray(geometry);
osg::ref_ptr<osg::Vec3Array> vertices = createVertexArray(polyhedron);
VertexIndexArrays polygons = createVertexIndexArrays(polyhedron);
for (auto const& polygon: polygons)
{
assert(polygon && polygon->size() >= 3);
if (!(faceMask & PolyhedronGeometry::FaceMaskFromSides(polygon->size()))) continue;
auto first = _vertices->size();
auto count = polygon->size();
auto normal = detail::calculateNormal(vertices, polygon);
auto color = detail::calculateColor(vertices, polygon);
for (auto i = 0u; i < polygon->size(); ++i)
{
auto vertex = vertices->at(polygon->at(i));
_vertices->push_back(vertex);
_normals->push_back(normal);
_colors->push_back(color);
}
geometry.addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::POLYGON, first, count));
}
tessellator.retessellatePolygons(geometry);
}
virtual void addVertex(Vertex& vertex)
{
osg::Vec3Array* vertices = getOrCreateVertexArray(*_geometry);
vertices->push_back(vertex._coord);
if (isGouraud())
{
osg::Vec4Array* colors = getOrCreateColorArray(*_geometry);
if (vertex.validColor())
{
colors->push_back(vertex._color);
}
else
{
// Use face color if vertex color is -1 in a gouraud polygon.
// http://www.multigen-paradigm.com/ubb/Forum1/HTML/000967.html
// Incorporate Face transparency per osg-users thread "Open Flight
// characteristic not reflected in the current OSG" (Sept/Oct 2011)
colors->push_back(osg::Vec4(_primaryColor.r(), _primaryColor.g(),
_primaryColor.b(), ( 1.0 - getTransparency() ) ));
}
}
bool strict = false; // prepare for "strict" reader option.
if (strict)
{
if (vertex.validNormal())
{
osg::Vec3Array* normals = getOrCreateNormalArray(*_geometry);
normals->push_back(vertex._normal);
}
}
else
{
// Add normal only if lit.
if (isLit())
{
osg::Vec3Array* normals = getOrCreateNormalArray(*_geometry);
if (vertex.validNormal())
normals->push_back(vertex._normal);
else // if lit and no normal in Vertex
{
// Use previous normal if available.
if (normals->empty())
normals->push_back(osg::Vec3(0,0,1));
else
normals->push_back(normals->back());
}
}
}
for (int layer=0; layer<Vertex::MAX_LAYERS; layer++)
{
if (vertex.validUV(layer))
{
osg::Vec2Array* UVs = getOrCreateTextureArray(*_geometry,layer);
UVs->push_back(vertex._uv[layer]);
}
}
}