RS_Vector RS_Line::getNearestPointOnEntity(const RS_Vector& coord,
bool onEntity, double* dist, RS_Entity** entity)const {
if (entity) {
*entity = const_cast<RS_Line*>(this);
}
RS_Vector direction = data.endpoint-data.startpoint;
RS_Vector vpc=coord-data.startpoint;
double a=direction.squared();
if( a < RS_TOLERANCE2) {
//line too short
vpc=getMiddlePoint();
}else{
//find projection on line
const double t=RS_Vector::dotP(vpc,direction)/a;
if( !isConstruction() && onEntity &&
( t<=-RS_TOLERANCE || t>=1.+RS_TOLERANCE )
){
// !( vpc.x>= minV.x && vpc.x <= maxV.x && vpc.y>= minV.y && vpc.y<=maxV.y) ) {
//projection point not within range, find the nearest endpoint
// std::cout<<"not within window, returning endpoints\n";
return getNearestEndpoint(coord,dist);
}
vpc = data.startpoint + direction*t;
}
if (dist) {
*dist = vpc.distanceTo(coord);
}
return vpc;
}
RS_Vector RS_Line::getNearestPointOnEntity(const RS_Vector& coord,
bool onEntity,
double* dist,
RS_Entity** entity) const
{
if (entity) {
*entity = const_cast<RS_Line*>(this);
}
RS_Vector direction {data.endpoint - data.startpoint};
RS_Vector vpc {coord - data.startpoint};
double a {direction.squared()};
if( a < RS_TOLERANCE2) {
//line too short
vpc = getMiddlePoint();
}
else {
//find projection on line
const double t {RS_Vector::dotP( vpc, direction) / a};
if( !isConstruction()
&& onEntity
&& ( t <= -RS_TOLERANCE
|| t >= 1. + RS_TOLERANCE ) ) {
//projection point not within range, find the nearest endpoint
return getNearestEndpoint( coord, dist);
}
vpc = data.startpoint + direction * t;
}
if (dist) {
*dist = vpc.distanceTo( coord);
}
return vpc;
}
void RS_Line::draw(RS_Painter* painter, RS_GraphicView* view, double& patternOffset) {
if (! (painter && view)) {
return;
}
//only draw the visible portion of line
LC_Rect const viewportRect{view->toGraph(0, 0),
view->toGraph(view->getWidth(), view->getHeight())};
RS_VectorSolutions endPoints(0);
if (viewportRect.inArea(getStartpoint(), RS_TOLERANCE))
endPoints.push_back(getStartpoint());
if (viewportRect.inArea(getEndpoint(), RS_TOLERANCE))
endPoints.push_back(getEndpoint());
RS_EntityContainer ec(nullptr);
ec.addRectangle(viewportRect.minP(), viewportRect.maxP());
if (endPoints.size()<2){
RS_VectorSolutions vpIts;
for(auto p: ec) {
auto const sol=RS_Information::getIntersection(this, p, true);
for (auto const& vp: sol) {
if (vpIts.getClosestDistance(vp) <= RS_TOLERANCE * 10.)
continue;
vpIts.push_back(vp);
}
}
for (auto const& vp: vpIts) {
if (endPoints.getClosestDistance(vp) <= RS_TOLERANCE * 10.)
continue;
endPoints.push_back(vp);
}
}
if (endPoints.size()<2) return;
if ((endPoints[0] - getStartpoint()).squared() >
(endPoints[1] - getStartpoint()).squared() )
std::swap(endPoints[0],endPoints[1]);
RS_Vector pStart{view->toGui(endPoints.at(0))};
RS_Vector pEnd{view->toGui(endPoints.at(1))};
// std::cout<<"draw line: "<<pStart<<" to "<<pEnd<<std::endl;
RS_Vector direction = pEnd-pStart;
if (isConstruction(true) && direction.squared() > RS_TOLERANCE){
//extend line on a construction layer to fill the whole view
RS_VectorSolutions vpIts;
for(auto p: ec) {
auto const sol=RS_Information::getIntersection(this, p, false);
for (auto const& vp: sol) {
if (vpIts.getClosestDistance(vp) <= RS_TOLERANCE * 10.)
continue;
vpIts.push_back(vp);
}
}
//draw construction lines up to viewport border
switch (vpIts.size()) {
case 2:
// no need to sort intersections
break;
case 3:
case 4: {
// will use the inner two points
size_t i{0};
for (size_t j = 2; j < vpIts.size(); ++j) {
if (viewportRect.inArea(vpIts.at(j), RS_TOLERANCE * 10.))
std::swap(vpIts[j], vpIts[i++]);
}
}
break;
default:
//should not happen
return;
}
pStart=view->toGui(vpIts.get(0));
pEnd=view->toGui(vpIts.get(1));
direction=pEnd-pStart;
}
double length=direction.magnitude();
patternOffset -= length;
if (( !isSelected() && (
getPen().getLineType()==RS2::SolidLine ||
view->getDrawingMode()==RS2::ModePreview)) ) {
//if length is too small, attempt to draw the line, could be a potential bug
painter->drawLine(pStart,pEnd);
return;
}
// double styleFactor = getStyleFactor(view);
// Pattern:
const RS_LineTypePattern* pat;
if (isSelected()) {
// styleFactor=1.;
pat = &RS_LineTypePattern::patternSelected;
} else {
pat = view->getPattern(getPen().getLineType());
}
if (!pat) {
// patternOffset -= length;
RS_DEBUG->print(RS_Debug::D_WARNING,
"RS_Line::draw: Invalid line pattern");
painter->drawLine(pStart,pEnd);
return;
}
// patternOffset = remainder(patternOffset - length-0.5*pat->totalLength,pat->totalLength)+0.5*pat->totalLength;
if(length<=RS_TOLERANCE){
painter->drawLine(pStart,pEnd);
return; //avoid division by zero
}
direction/=length; //cos(angle), sin(angle)
// Pen to draw pattern is always solid:
RS_Pen pen = painter->getPen();
pen.setLineType(RS2::SolidLine);
painter->setPen(pen);
// index counter
size_t i;
// pattern segment length:
double patternSegmentLength = pat->totalLength;
// create pattern:
size_t const patnum=pat->num > 0?pat->num:0;
std::vector<RS_Vector> dp(patnum);
std::vector<double> ds(patnum, 0.);
if (pat->num >0 ){
double dpmm=static_cast<RS_PainterQt*>(painter)->getDpmm();
for (i=0; i<pat->num; ++i) {
// ds[j]=pat->pattern[i] * styleFactor;
//fixme, styleFactor support needed
ds[i]=dpmm*pat->pattern[i];
if (fabs(ds[i]) < 1. ) ds[i] = (ds[i]>=0.)?1.:-1.;
dp[i] = direction*fabs(ds[i]);
}
} else {
RS_DEBUG->print(RS_Debug::D_WARNING,"invalid line pattern for line, draw solid line instread");
painter->drawLine(view->toGui(getStartpoint()),
view->toGui(getEndpoint()));
return;
}
double total= remainder(patternOffset-0.5*patternSegmentLength,patternSegmentLength) -0.5*patternSegmentLength;
// double total= patternOffset-patternSegmentLength;
RS_Vector curP{pStart+direction*total};
for (int j=0; total<length; j=(j+1)%i) {
// line segment (otherwise space segment)
double const t2=total+fabs(ds[j]);
RS_Vector const& p3=curP+dp[j];
if (ds[j]>0.0 && t2 > 0.0) {
// drop the whole pattern segment line, for ds[i]<0:
// trim end points of pattern segment line to line
RS_Vector const& p1 =(total > -0.5)?curP:pStart;
RS_Vector const& p2 =(t2<length+0.5)?p3:pEnd;
painter->drawLine(p1,p2);
}
total=t2;
curP=p3;
}
}
