void TextStrokeRenderer::RenderStrokeRepBasic(StrokeRep *iStrokeRep) const{
Stroke *stroke = iStrokeRep->getStroke();
if(!stroke){
cerr << "no stroke associated with Rep" << endl;
return;
}
StrokeInternal::StrokeVertexIterator v = stroke->strokeVerticesBegin();
StrokeAttribute att;
while(!v.isEnd()){
att = v->attribute();
_ofstream << v->u() << " " << (double) v->getProjectedX() << " " << (double) v->getProjectedY() << " " << (double) v->getProjectedZ() << " " \
<< att.getThicknessL() << " " << att.getThicknessR() << " " \
<< att.getColorR() << " " << att.getColorG() << " " << att.getColorB() << " ";
++v;
}
_ofstream << endl;
}
static Stroke *createStroke(Interface1D& inter)
{
Stroke *stroke = new Stroke;
stroke->setId(inter.getId());
float currentCurvilignAbscissa = 0.0f;
Interface0DIterator it = inter.verticesBegin(), itend = inter.verticesEnd();
Interface0DIterator itfirst = it;
Vec2r current(it->getPoint2D());
Vec2r previous = current;
SVertex *sv;
CurvePoint *cp;
StrokeVertex *stroke_vertex = NULL;
bool hasSingularity = false;
do {
cp = dynamic_cast<CurvePoint*>(&(*it));
if (!cp) {
sv = dynamic_cast<SVertex*>(&(*it));
if (!sv) {
cerr << "Warning: unexpected Vertex type" << endl;
continue;
}
stroke_vertex = new StrokeVertex(sv);
}
else {
stroke_vertex = new StrokeVertex(cp);
}
current = stroke_vertex->getPoint2D();
Vec2r vec_tmp(current - previous);
real dist = vec_tmp.norm();
if (dist < 1.0e-6)
hasSingularity = true;
currentCurvilignAbscissa += dist;
stroke_vertex->setCurvilinearAbscissa(currentCurvilignAbscissa);
stroke->push_back(stroke_vertex);
previous = current;
++it;
} while ((it != itend) && (it != itfirst));
if (it == itfirst) {
// Add last vertex:
cp = dynamic_cast<CurvePoint*>(&(*it));
if (!cp) {
sv = dynamic_cast<SVertex*>(&(*it));
if (!sv)
cerr << "Warning: unexpected Vertex type" << endl;
else
stroke_vertex = new StrokeVertex(sv);
}
else {
stroke_vertex = new StrokeVertex(cp);
}
current = stroke_vertex->getPoint2D();
Vec2r vec_tmp(current - previous);
real dist = vec_tmp.norm();
if (dist < 1.0e-6)
hasSingularity = true;
currentCurvilignAbscissa += dist;
stroke_vertex->setCurvilinearAbscissa(currentCurvilignAbscissa);
stroke->push_back(stroke_vertex);
}
// Discard the stroke if the number of stroke vertices is less than two
if (stroke->strokeVerticesSize() < 2) {
delete stroke;
return NULL;
}
stroke->setLength(currentCurvilignAbscissa);
if (hasSingularity) {
// Try to address singular points such that the distance between two subsequent vertices
// are smaller than epsilon.
StrokeInternal::StrokeVertexIterator v = stroke->strokeVerticesBegin();
StrokeInternal::StrokeVertexIterator vnext = v;
++vnext;
Vec2r next((*v).getPoint());
while (!vnext.isEnd()) {
current = next;
next = (*vnext).getPoint();
if ((next - current).norm() < 1.0e-6) {
StrokeInternal::StrokeVertexIterator vprevious = v;
if (!vprevious.isBegin())
--vprevious;
// collect a set of overlapping vertices
std::vector<StrokeVertex *> overlapping_vertices;
overlapping_vertices.push_back(&(*v));
do {
overlapping_vertices.push_back(&(*vnext));
current = next;
++v;
++vnext;
if (vnext.isEnd())
break;
next = (*vnext).getPoint();
} while ((next - current).norm() < 1.0e-6);
Vec2r target;
bool reverse;
if (!vnext.isEnd()) {
target = (*vnext).getPoint();
reverse = false;
}
else if (!vprevious.isBegin()) {
target = (*vprevious).getPoint();
reverse = true;
}
else {
// Discard the stroke because all stroke vertices are overlapping
delete stroke;
return NULL;
}
current = overlapping_vertices.front()->getPoint();
Vec2r dir(target - current);
real dist = dir.norm();
real len = 1.0e-3; // default offset length
int nvert = overlapping_vertices.size();
if (dist < len * nvert) {
len = dist / nvert;
}
dir.normalize();
Vec2r offset(dir * len);
// add the offset to the overlapping vertices
StrokeVertex *sv;
std::vector<StrokeVertex *>::iterator it = overlapping_vertices.begin();
if (!reverse) {
for (int n = 0; n < nvert; n++) {
sv = (*it);
sv->setPoint(sv->getPoint() + offset * (n + 1));
++it;
}
}
else {
for (int n = 0; n < nvert; n++) {
sv = (*it);
sv->setPoint(sv->getPoint() + offset * (nvert - n));
++it;
}
}
if (vnext.isEnd())
break;
}
++v;
++vnext;
}
}
{
// Check if the stroke no longer contains singular points
Interface0DIterator v = stroke->verticesBegin();
Interface0DIterator vnext = v;
++vnext;
Vec2r next((*v).getPoint2D());
bool warning = false;
while (!vnext.isEnd()) {
current = next;
next = (*vnext).getPoint2D();
if ((next - current).norm() < 1.0e-6) {
warning = true;
break;
}
++v;
++vnext;
}
if (warning && G.debug & G_DEBUG_FREESTYLE) {
printf("Warning: stroke contains singular points.\n");
}
}
return stroke;
}