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Chenwenxuan
2024-03-06 14:54:30 +08:00
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actions/rs_actiondrawcircletan3.cpp Normal file
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/****************************************************************************
**
* Draw circle by foci and a point on circle
Copyright (C) 2012 Dongxu Li (dongxuli2011@gmail.com)
Copyright (C) 2011 R. van Twisk (librecad@rvt.dds.nl)
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**********************************************************************/
#include "rs_actiondrawcircletan3.h"
#include <QAction>
#include <QMouseEvent>
#include "rs_dialogfactory.h"
#include "rs_graphicview.h"
#include "rs_commandevent.h"
#include "rs_circle.h"
#include "rs_line.h"
#include "rs_point.h"
#include "lc_quadratic.h"
#include "rs_information.h"
#include "rs_preview.h"
#include "rs_debug.h"
struct RS_ActionDrawCircleTan3::Points {
std::vector<RS_AtomicEntity*> circles;
std::shared_ptr<RS_CircleData> cData{std::make_shared<RS_CircleData>()};
RS_Vector coord;
bool valid{false};
//keep a list of centers found
std::vector<std::shared_ptr<RS_CircleData> > candidates;
RS_VectorSolutions centers;
};
RS_ActionDrawCircleTan3::~RS_ActionDrawCircleTan3() = default;
/**
* Constructor.
*
*/
RS_ActionDrawCircleTan3::RS_ActionDrawCircleTan3(
RS_EntityContainer& container,
RS_GraphicView& graphicView)
:RS_PreviewActionInterface("Draw circle inscribed",
container, graphicView)
, pPoints(new Points{})
{
actionType=RS2::ActionDrawCircleTan3;
}
void RS_ActionDrawCircleTan3::init(int status) {
RS_PreviewActionInterface::init(status);
if(status>=0) {
RS_Snapper::suspend();
}
if (status==SetCircle1) {
pPoints->circles.clear();
}
}
void RS_ActionDrawCircleTan3::finish(bool updateTB){
if(pPoints->circles.size()>0){
for(RS_AtomicEntity* const pc: pPoints->circles)
if(pc) pc->setHighlighted(false);
graphicView->redraw(RS2::RedrawDrawing);
pPoints->circles.clear();
}
RS_PreviewActionInterface::finish(updateTB);
}
void RS_ActionDrawCircleTan3::trigger() {
RS_PreviewActionInterface::trigger();
RS_Circle* circle=new RS_Circle(container, *pPoints->cData);
container->addEntity(circle);
// upd. undo list:
if (document) {
document->startUndoCycle();
document->addUndoable(circle);
document->endUndoCycle();
}
for(RS_AtomicEntity* const pc: pPoints->circles)
if(pc) pc->setHighlighted(false);
graphicView->redraw(RS2::RedrawDrawing);
// drawSnapper();
pPoints->circles.clear();
setStatus(SetCircle1);
RS_DEBUG->print("RS_ActionDrawCircleTan3::trigger():"
" entity added: %d", circle->getId());
}
void RS_ActionDrawCircleTan3::mouseMoveEvent(QMouseEvent* e) {
RS_DEBUG->print("RS_ActionDrawCircleTan3::mouseMoveEvent begin");
switch(getStatus() ){
case SetCenter: {
// RS_Entity* en = catchEntity(e, enTypeList, RS2::ResolveAll);
pPoints->coord= graphicView->toGraph(e->x(), e->y());
// circles[getStatus()]=static_cast<RS_Line*>(en);
deletePreview();
if(preparePreview()) {
RS_Circle* e=new RS_Circle(preview.get(), *pPoints->cData);
preview->addEntity(e);
for(auto& c: pPoints->candidates){
preview->addEntity(new RS_Point(nullptr, RS_PointData(c->center)));
}
drawPreview();
}
}
break;
default:
break;
}
RS_DEBUG->print("RS_ActionDrawCircleTan3::mouseMoveEvent end");
}
bool RS_ActionDrawCircleTan3::getData(){
if(getStatus() != SetCircle3) return false;
//find the nearest circle
size_t i=0;
size_t const countLines=std::count_if(pPoints->circles.begin(), pPoints->circles.end(), [](RS_AtomicEntity* e)->bool
{
return e->rtti()==RS2::EntityLine;
});
for(;i<pPoints->circles.size();++i)
if(pPoints->circles[i]->rtti() == RS2::EntityLine) break;
pPoints->candidates.clear();
size_t i1=(i+1)%3;
size_t i2=(i+2)%3;
if(i<pPoints->circles.size() && pPoints->circles[i]->rtti() == RS2::EntityLine){
//one or more lines
LC_Quadratic lc0(pPoints->circles[i],pPoints->circles[i1],false);
LC_Quadratic lc1;
RS_VectorSolutions sol;
//detect degenerate case two circles with the same radius
switch(countLines){
default:
case 0:
//this should not happen
assert(false);
case 1:
//1 line, two circles
{
for(unsigned k=0; k<4; ++k){
//loop through all mirroring cases
lc1=LC_Quadratic(pPoints->circles[i],pPoints->circles[i1], k & 1u);
LC_Quadratic lc2=LC_Quadratic(pPoints->circles[i],pPoints->circles[i2], k & 2u);
sol.push_back(LC_Quadratic::getIntersection(lc1,lc2));
}
}
break;
case 2:
//2 lines, one circle
{
if(pPoints->circles[i2]->rtti()==RS2::EntityLine){
std::swap(i1, i2);
}
//i2 is circle
for(unsigned k=0; k<4; ++k){
//loop through all mirroring cases
lc1=LC_Quadratic(pPoints->circles[i2],pPoints->circles[i], k & 1u);
LC_Quadratic lc2=LC_Quadratic(pPoints->circles[i2],pPoints->circles[i1], k & 2u);
sol.push_back(LC_Quadratic::getIntersection(lc1,lc2));
}
}
break;
case 3:
//3 lines
{
lc0=pPoints->circles[i]->getQuadratic();
lc1=pPoints->circles[i1]->getQuadratic();
auto lc2=pPoints->circles[i2]->getQuadratic();
//attempt to have intersections (lc0, lc1), (lc0, lc2)
auto sol1=LC_Quadratic::getIntersection(lc0,lc1);
if(sol1.size()<1) {
std::swap(lc0, lc2);
std::swap(i, i2);
}
sol1=LC_Quadratic::getIntersection(lc0,lc2);
if(sol1.size()<1) {
std::swap(lc0, lc1);
std::swap(i, i1);
}
RS_Line* line0=static_cast<RS_Line*>(pPoints->circles[i]);
RS_Line* line1=static_cast<RS_Line*>(pPoints->circles[i1]);
RS_Line* line2=static_cast<RS_Line*>(pPoints->circles[i2]);
lc0=line0->getQuadratic();
lc1=line1->getQuadratic();
lc2=line2->getQuadratic();
//intersection 0, 1
sol1=LC_Quadratic::getIntersection(lc0,lc1);
if(!sol1.size()) {
return false;
}
RS_Vector const v1=sol1.at(0);
double angle1=0.5*(line0->getAngle1()+line1->getAngle1());
//intersection 0, 2
sol1=LC_Quadratic::getIntersection(lc0,lc2);
double angle2;
if(sol1.size()<1) {
return false;
}
angle2=0.5*(line0->getAngle1()+line2->getAngle1());
RS_Vector const& v2=sol1.at(0);
//two bisector lines per intersection
for(unsigned j=0; j<2; ++j){
RS_Line l1{v1, v1+RS_Vector{angle1}};
for(unsigned j1=0; j1<2; ++j1){
RS_Line l2{v2, v2+RS_Vector{angle2}};
sol.push_back(RS_Information::getIntersectionLineLine(&l1, &l2));
angle2 += M_PI_2;
}
angle1 += M_PI_2;
}
}
}
double d;
//line passes circle center, need a second parabola as the image of the line
for(int j=1;j<=2;j++){
if(pPoints->circles[(i+j)%3]->rtti() == RS2::EntityCircle){
pPoints->circles[i]->getNearestPointOnEntity(pPoints->circles[(i+j)%3]->getCenter(),
false,&d);
if(d<RS_TOLERANCE) {
LC_Quadratic lc2(pPoints->circles[i],pPoints->circles[(i+j)%3], true);
sol.push_back(LC_Quadratic::getIntersection(lc2,lc1));
}
}
}
//clean up duplicate and invalid
RS_VectorSolutions sol1;
for(const RS_Vector& vp: sol){
if(vp.magnitude()>RS_MAXDOUBLE) continue;
if(sol1.size() && sol1.getClosestDistance(vp)<RS_TOLERANCE) continue;
sol1.push_back(vp);
}
for(auto const& v: sol1){
pPoints->circles[i]->getNearestPointOnEntity(v,false,&d);
auto data = std::make_shared<RS_CircleData>(v,d);
if(pPoints->circles[(i+1)%3]->isTangent(*data)==false) continue;
if(pPoints->circles[(i+2)%3]->isTangent(*data)==false) continue;
pPoints->candidates.push_back(data);
}
} else {
RS_Circle c{nullptr, *pPoints->cData};
auto solutions=c.createTan3(pPoints->circles);
pPoints->candidates.clear();
for(const RS_Circle& s: solutions){
pPoints->candidates.push_back(std::make_shared<RS_CircleData>(s.getData()));
}
}
pPoints->valid = ( pPoints->candidates.size() >0);
return pPoints->valid;
}
bool RS_ActionDrawCircleTan3::preparePreview(){
if(getStatus() != SetCenter || pPoints->valid==false) {
pPoints->valid=false;
return false;
}
//find the nearest circle
size_t index=pPoints->candidates.size();
double dist=RS_MAXDOUBLE*RS_MAXDOUBLE;
for(size_t i=0;i<pPoints->candidates.size();++i){
preview->addEntity(new RS_Point(preview.get(), RS_PointData(pPoints->candidates.at(i)->center)));
double d;
RS_Circle(nullptr, *pPoints->candidates.at(i)).getNearestPointOnEntity(pPoints->coord,false,&d);
double dCenter=pPoints->coord.distanceTo(pPoints->candidates.at(i)->center);
d=std::min(d,dCenter);
if(d<dist){
dist=d;
index=i;
}
}
if( index<pPoints->candidates.size()){
pPoints->cData=pPoints->candidates.at(index);
pPoints->valid=true;
}else{
pPoints->valid=false;
}
return pPoints->valid;
}
RS_Entity* RS_ActionDrawCircleTan3::catchCircle(QMouseEvent* e) {
RS_Entity* ret=nullptr;
RS_Entity* en = catchEntity(e,enTypeList, RS2::ResolveAll);
if (!en) return ret;
if (!en->isVisible()) return ret;
for(int i=0;i<getStatus();++i) {
if(en->getId() == pPoints->circles[i]->getId()) return ret; //do not pull in the same line again
}
if(en->getParent()) {
if ( en->getParent()->ignoredOnModification()){
return nullptr;
}
}
return en;
}
void RS_ActionDrawCircleTan3::mouseReleaseEvent(QMouseEvent* e) {
// Proceed to next status
if (e->button()==Qt::LeftButton) {
switch (getStatus()) {
case SetCircle1:
case SetCircle2:
case SetCircle3: {
RS_Entity* en = catchCircle(e);
if (!en) return;
pPoints->circles.resize(getStatus());
for(const RS_AtomicEntity* const pc: pPoints->circles)
if(pc == en) continue;
pPoints->circles.push_back(static_cast<RS_AtomicEntity*>(en));
if(getStatus()<=SetCircle2 || (getStatus()==SetCircle3 && getData())){
pPoints->circles.at(pPoints->circles.size()-1)->setHighlighted(true);
graphicView->redraw(RS2::RedrawDrawing);
setStatus(getStatus()+1);
}
}
break;
case SetCenter:
pPoints->coord= graphicView->toGraph(e->x(), e->y());
if( preparePreview()) trigger();
break;
default:
break;
}
} else if (e->button()==Qt::RightButton) {
// Return to last status:
if(getStatus()>0){
pPoints->circles[getStatus()-1]->setHighlighted(false);
pPoints->circles.pop_back();
graphicView->redraw(RS2::RedrawDrawing);
deletePreview();
}
init(getStatus()-1);
}
}
//void RS_ActionDrawCircleTan3::coordinateEvent(RS_CoordinateEvent* e) {
//}
//fixme, support command line
/*
void RS_ActionDrawCircleTan3::commandEvent(RS_CommandEvent* e) {
QString c = e->getCommand().toLower();
if (checkCommand("help", c)) {
RS_DIALOGFACTORY->commandMessage(msgAvailableCommands()
+ getAvailableCommands().join(", "));
return;
}
switch (getStatus()) {
case SetFocus1: {
bool ok;
double m = RS_Math::eval(c, &ok);
if (ok) {
ratio = m / major.magnitude();
if (!isArc) {
trigger();
} else {
setStatus(SetAngle1);
}
} else
RS_DIALOGFACTORY->commandMessage(tr("Not a valid expression"));
}
break;
case SetAngle1: {
bool ok;
double a = RS_Math::eval(c, &ok);
if (ok) {
angle1 = RS_Math::deg2rad(a);
setStatus(SetAngle2);
} else
RS_DIALOGFACTORY->commandMessage(tr("Not a valid expression"));
}
break;
case SetAngle2: {
bool ok;
double a = RS_Math::eval(c, &ok);
if (ok) {
angle2 = RS_Math::deg2rad(a);
trigger();
} else
RS_DIALOGFACTORY->commandMessage(tr("Not a valid expression"));
}
break;
default:
break;
}
}
*/
QStringList RS_ActionDrawCircleTan3::getAvailableCommands() {
QStringList cmd;
return cmd;
}
void RS_ActionDrawCircleTan3::updateMouseButtonHints() {
switch (getStatus()) {
case SetCircle1:
RS_DIALOGFACTORY->updateMouseWidget(tr("Specify the first line/arc/circle"),
tr("Cancel"));
break;
case SetCircle2:
RS_DIALOGFACTORY->updateMouseWidget(tr("Specify the second line/arc/circle"),
tr("Back"));
break;
case SetCircle3:
RS_DIALOGFACTORY->updateMouseWidget(tr("Specify the third line/arc/circle"),
tr("Back"));
break;
case SetCenter:
RS_DIALOGFACTORY->updateMouseWidget(tr("Select the center of the tangent circle"),
tr("Back"));
break;
default:
RS_DIALOGFACTORY->updateMouseWidget();
break;
}
}
void RS_ActionDrawCircleTan3::updateMouseCursor() {
graphicView->setMouseCursor(RS2::SelectCursor);
}
// EOF