diff --git a/src/bezierline.cpp b/src/bezierline.cpp new file mode 100644 index 0000000..6c702dc --- /dev/null +++ b/src/bezierline.cpp @@ -0,0 +1,181 @@ +#include "q_pen_drawer/bezierline.h" + +#include +#include +#include +#include +#include + +BezierLine::BezierLine(){ +} + +QRectF BezierLine::boundingRect() const { + if(points_.begin() == points_.end()){ + return QRectF(0.0, 0.0, 0.0, 0.0); + } + else{ + auto x_min = std::min_element(points_.begin(), points_.end(), [](const BezierPoint &a, const BezierPoint &b){ + return a.position.x() < b.position.x(); + })->position.x(); + auto x_max = std::max_element(points_.begin(), points_.end(), [](const BezierPoint &a, const BezierPoint &b){ + return a.position.x() > b.position.x(); + })->position.x(); + auto y_min = std::min_element(points_.begin(), points_.end(), [](const BezierPoint &a, const BezierPoint &b){ + return a.position.y() < b.position.y(); + })->position.y(); + auto y_max = std::max_element(points_.begin(), points_.end(), [](const BezierPoint &a, const BezierPoint &b){ + return a.position.y() > b.position.y(); + })->position.y(); + return QRectF(x_min-5, y_min-5, x_max - x_min + 5, y_max - y_min + 5); + } +} + +bool BezierLine::selectClosest(QPointF point){ + for(int i=0 ; icontrol_after = point; + current_point_iterator->control_before = 2 * current_point_iterator->position - point; + } + else{ + switch (active_point_.second) { + case UpdateMode::Position: { + QPointF delta = point - points_[active_point_.first].position; + points_[active_point_.first].position += delta; + points_[active_point_.first].control_after += delta; + points_[active_point_.first].control_before += delta; + break; + } + case UpdateMode::ControlAfter: { + QPointF w = point - points_[active_point_.first].position; + QPointF v = points_[active_point_.first].control_after - points_[active_point_.first].position; + + points_[active_point_.first].control_after = point; + qreal delta = qAtan2(w.y() * v.x() - w.x() * v.y(), w.x() * v.x() + w.y() * v.y()); + + qreal cosa = std::cos(delta); + qreal sina = std::sin(delta); + + QTransform translate(1, 0, 0, 1, -points_[active_point_.first].position.x(), -points_[active_point_.first].position.y()); + QTransform rotate(cosa, sina, -sina, cosa, 0, 0); + QTransform back_translate(1, 0, 0, 1, points_[active_point_.first].position.x(), points_[active_point_.first].position.y()); + + QTransform transform = translate * rotate * back_translate; + + points_[active_point_.first].control_before = transform.map(points_[active_point_.first].control_before); + + break; + } + case UpdateMode::ControlBefore: { + QPointF w = point - points_[active_point_.first].position; + QPointF v = points_[active_point_.first].control_before - points_[active_point_.first].position; + + points_[active_point_.first].control_before = point; + qreal delta = qAtan2(w.y() * v.x() - w.x() * v.y(), w.x() * v.x() + w.y() * v.y()); + + qreal cosa = std::cos(delta); + qreal sina = std::sin(delta); + + QTransform translate(1, 0, 0, 1, -points_[active_point_.first].position.x(), -points_[active_point_.first].position.y()); + QTransform rotate(cosa, sina, -sina, cosa, 0, 0); + QTransform back_translate(1, 0, 0, 1, points_[active_point_.first].position.x(), points_[active_point_.first].position.y()); + + QTransform transform = translate * rotate * back_translate; + + points_[active_point_.first].control_after = transform.map(points_[active_point_.first].control_after); + + break; + } + } + + } +} + +QList BezierLine::getPoints(){ + return QList(); +} + +void BezierLine::paint(QPainter* painter, const QStyleOptionGraphicsItem* /*option*/, QWidget* /*widget*/){ + QPen position_pen, control_pen, line_pen; + + position_pen.setWidth(2); + position_pen.setStyle(Qt::SolidLine); + control_pen = position_pen; + + line_pen.setWidth(1); + line_pen.setStyle(Qt::DotLine); + line_pen.setColor(Qt::blue); + + position_pen.setColor(Qt::green); + control_pen.setColor(Qt::blue); + + + for(const auto &point : points_){ + painter->setPen(position_pen); + painter->drawEllipse(point.position.x() - point_size_ / 2, point.position.y() - point_size_ / 2, point_size_, point_size_); + painter->setPen(control_pen); + painter->drawEllipse(point.control_before.x() - point_size_ / 2, point.control_before.y() - point_size_ / 2, point_size_, point_size_); + painter->drawEllipse(point.control_after.x() - point_size_ / 2, point.control_after.y() - point_size_ / 2, point_size_, point_size_); + painter->setPen(line_pen); + painter->drawLine(point.control_before, point.control_after); + } + + if(points_.begin() == points_.end()) return; + + if(points_.begin() + 1 == points_.end()) return; + + for(auto it = points_.begin() ; it != points_.end(); it++){ + if (it == points_.begin()) continue; + + auto arc_length_approx = (std::hypot(((it-1)->position - it->position).x(), ((it-1)->position - it->position).y() ) + + std::hypot(((it-1)->position - (it-1)->control_after).x(), ((it-1)->position - (it-1)->control_after).y() ) + + std::hypot((it->control_before - (it-1)->control_after).x(), (it->control_before - (it-1)->control_after).y() ) + + std::hypot((it->position - it->control_before).x(), (it->position - it->control_before).y() )) / 2.0; + + qreal delta = average_step_length_ / arc_length_approx; + + qreal t = delta; + + QPointF last = (it-1)->position; + + while(t < 1.0){ + + QPointF p_b = qPow(1.0-t, 3) * (it-1)->position + + 3 * qPow(1.0 - t, 2) * t * (it-1)->control_after + + 3 * qPow(t, 2) * (1.0 - t) * it->control_before + + qPow(t, 3) * it->position; + + painter->setPen(control_pen); + painter->drawEllipse(p_b.x() - 1, p_b.y() - 1, 2, 2); + painter->drawLine(last, p_b); + last = p_b; + t += delta; + } + + painter->drawLine(last, it->position); + + } +}

q_pen_drawer

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adds bezier lines

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