RS_Vector RS_Line::getNearestPointOnEntity(const RS_Vector& coord,
bool onEntity, double* dist, RS_Entity** entity)const {
if (entity!=NULL) {
*entity = const_cast<RS_Line*>(this);
}
//std::cout<<"RS_Line::getNearestPointOnEntity():"<<coord<<std::endl;
RS_Vector direction = data.endpoint-data.startpoint;
RS_Vector vpc=coord-data.startpoint;
double a=direction.squared();
if( a < RS_TOLERANCE*RS_TOLERANCE) {
//line too short
vpc=getMiddlePoint();
}else{
//find projection on line
vpc = data.startpoint + direction*RS_Vector::dotP(vpc,direction)/a;
if( !isHelpLayer() && onEntity &&
! vpc.isInWindowOrdered(minV,maxV) ){
// !( 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);
}
}
if (dist!=NULL) {
*dist = vpc.distanceTo(coord);
}
return vpc;
}
void RS_Line::draw(RS_Painter* painter, RS_GraphicView* view, double& patternOffset) {
if (painter==NULL || view==NULL) {
return;
}
//only draw the visible portion of line
QVector<RS_Vector> endPoints(0);
RS_Vector vpMin(view->toGraph(0,view->getHeight()));
RS_Vector vpMax(view->toGraph(view->getWidth(),0));
QPolygonF visualBox(QRectF(vpMin.x,vpMin.y,vpMax.x-vpMin.x, vpMax.y-vpMin.y));
if( getStartpoint().isInWindowOrdered(vpMin, vpMax) ) endPoints<<getStartpoint();
if( getEndpoint().isInWindowOrdered(vpMin, vpMax) ) endPoints<<getEndpoint();
if(endPoints.size()<2){
QVector<RS_Vector> vertex;
for(unsigned short i=0;i<4;i++){
const QPointF& vp(visualBox.at(i));
vertex<<RS_Vector(vp.x(),vp.y());
}
for(unsigned short i=0;i<4;i++){
RS_Line line(NULL,RS_LineData(vertex.at(i),vertex.at((i+1)%4)));
auto&& vpIts=RS_Information::getIntersection(static_cast<RS_Entity*>(this), &line, true);
if( vpIts.size()==0) continue;
endPoints<<vpIts.get(0);
}
}
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(isHelpLayer(true) && direction.squared() > RS_TOLERANCE){
//extend line on a help layer to fill the whole view
RS_Vector lb(0,0);
RS_Vector rt(view->getWidth(),view->getHeight());
QList<RS_Vector> rect;
rect<<lb<<RS_Vector(rt.x,lb.y);
rect<<rt<<RS_Vector(lb.x,rt.y);
rect<<lb;
RS_VectorSolutions sol;
RS_Line dLine(pStart,pEnd);
for(int i=0;i<4;i++){
RS_Line bLine(rect.at(i),rect.at(i+1));
RS_VectorSolutions sol2=RS_Information::getIntersection(&bLine, &dLine);
if( sol2.getNumber()>0 && bLine.isPointOnEntity(sol2.get(0),RS_TOLERANCE)) {
sol.push_back(sol2.get(0));
}
}
switch(sol.getNumber()){
case 2:
pStart=sol.get(0);
pEnd=sol.get(1);
break;
case 3:
case 4:
pStart=sol.get(0);
pEnd=sol.get(2);
break;
default:
return;
}
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:
RS_LineTypePattern* pat;
if (isSelected()) {
// styleFactor=1.;
pat = &patternSelected;
} else {
pat = view->getPattern(getPen().getLineType());
}
if (pat==NULL) {
// 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
int i;
// pattern segment length:
double patternSegmentLength = pat->totalLength;
// create pattern:
RS_Vector* dp=new RS_Vector[pat->num > 0?pat->num:0];
double* ds=new double[pat->num > 0?pat->num: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 {
delete[] dp;
delete[] ds;
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 p1,p2,p3;
RS_Vector curP(pStart+direction*total);
double t2;
for(int j=0;total<length;j=(j+1)%i) {
// line segment (otherwise space segment)
t2=total+fabs(ds[j]);
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
p1 =(total > -0.5)? curP:pStart;
p2 =(t2<length+0.5)?p3:pEnd;
painter->drawLine(p1,p2);
}
total=t2;
curP=p3;
}
delete[] dp;
delete[] ds;
}
void RS_Line::draw(RS_Painter* painter, RS_GraphicView* view, double& patternOffset) {
if (painter==NULL || view==NULL) {
return;
}
//visible in grahic view
if(isVisibleInWindow(view)==false) return;
RS_Vector pStart(view->toGui(getStartpoint()));
RS_Vector pEnd(view->toGui(getEndpoint()));
// std::cout<<"draw line: "<<pStart<<" to "<<pEnd<<std::endl;
RS_Vector direction=pEnd-pStart;
if(isHelpLayer(true) && direction.squared() > RS_TOLERANCE){
//extend line on a help layer to fill the whole view
RS_Vector lb(0,0);
RS_Vector rt(view->getWidth(),view->getHeight());
QList<RS_Vector> rect;
rect<<lb<<RS_Vector(rt.x,lb.y);
rect<<rt<<RS_Vector(lb.x,rt.y);
rect<<lb;
RS_VectorSolutions sol;
RS_Line dLine(pStart,pEnd);
for(int i=0;i<4;i++){
RS_Line bLine(rect.at(i),rect.at(i+1));
RS_VectorSolutions sol2=RS_Information::getIntersection(&bLine, &dLine);
if( sol2.getNumber()>0 && bLine.isPointOnEntity(sol2.get(0),RS_TOLERANCE)) {
sol.push_back(sol2.get(0));
}
}
switch(sol.getNumber()){
case 2:
pStart=sol.get(0);
pEnd=sol.get(1);
break;
case 3:
case 4:
pStart=sol.get(0);
pEnd=sol.get(2);
break;
default:
return;
}
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:
RS_LineTypePattern* pat;
if (isSelected()) {
// styleFactor=1.;
pat = &patternSelected;
} else {
pat = view->getPattern(getPen().getLineType());
}
if (pat==NULL) {
// 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
int i;
// pattern segment length:
double patternSegmentLength = pat->totalLength;
// create pattern:
RS_Vector* dp=new RS_Vector[pat->num > 0?pat->num:0];
double* ds=new double[pat->num > 0?pat->num:0];
if (pat->num >0 ){
for (i=0; i<pat->num; ++i) {
// ds[j]=pat->pattern[i] * styleFactor;
//fixme, styleFactor support needed
ds[i]=pat->pattern[i] ;
dp[i] = direction*fabs(ds[i]);
}
}else {
delete[] dp;
delete[] ds;
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 p1,p2,p3;
RS_Vector curP(pStart+direction*total);
double t2;
for(int j=0;total<length;j=(j+1)%i) {
// line segment (otherwise space segment)
t2=total+fabs(ds[j]);
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
p1 =(total > -0.5)? curP:pStart;
p2 =(t2<length+0.5)?p3:pEnd;
painter->drawLine(p1,p2);
}
total=t2;
curP=p3;
}
delete[] dp;
delete[] ds;
}