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改进平滑曲线

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This commit is contained in:
feiyangqingyun
2021-03-09 09:56:59 +08:00
parent cd0029a6de
commit 3a4b44cd58
9 changed files with 91 additions and 31 deletions
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44
smoothcurve/frmsmoothcurve.cpp
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@@ -5,6 +5,8 @@
#include "qdatetime.h"
#include "qdebug.h"
#define TIMEMS QTime::currentTime().toString("hh:mm:ss zzz")
frmSmoothCurve::frmSmoothCurve(QWidget *parent) : QWidget(parent), ui(new Ui::frmSmoothCurve)
{
ui->setupUi(this);
@@ -19,17 +21,27 @@ frmSmoothCurve::frmSmoothCurve(QWidget *parent) : QWidget(parent), ui(new Ui::fr
x += qMin(qrand() % 30 + 5, 300);
}
//根据曲线上的点创建平滑曲线
smoothCurve = SmoothCurve::createSmoothCurve(datas);
// 直接连接点的创建非平滑曲线曲线
smoothCurve2.moveTo(datas[0]);
//正常曲线
pathNormal.moveTo(datas.at(0));
for (int i = 1; i < datas.size(); ++i) {
smoothCurve2.lineTo(datas[i]);
pathNormal.lineTo(datas.at(i));
}
connect(ui->showKnotsCheckBox, SIGNAL(clicked(bool)), this, SLOT(update()));
connect(ui->showSmoothCurveCheckBox, SIGNAL(clicked(bool)), this, SLOT(update()));
//平滑曲线1
qDebug() << TIMEMS << "createSmoothCurve start";
pathSmooth1 = SmoothCurve::createSmoothCurve(datas);
qDebug() << TIMEMS << "createSmoothCurve stop";
//平滑曲线2
qDebug() << TIMEMS << "createSmoothCurve2 start";
pathSmooth2 = SmoothCurve::createSmoothCurve2(datas);
qDebug() << TIMEMS << "createSmoothCurve2 stop";
ui->ckShowPoint->setChecked(true);
connect(ui->ckShowPoint, SIGNAL(clicked(bool)), this, SLOT(update()));
connect(ui->rbtnPathNormal, SIGNAL(clicked(bool)), this, SLOT(update()));
connect(ui->rbtnPathSmooth1, SIGNAL(clicked(bool)), this, SLOT(update()));
connect(ui->rbtnPathSmooth2, SIGNAL(clicked(bool)), this, SLOT(update()));
}
frmSmoothCurve::~frmSmoothCurve()
@@ -49,20 +61,22 @@ void frmSmoothCurve::paintEvent(QPaintEvent *)
painter.drawLine(-250, 0, 250, 0);
painter.drawLine(0, 150, 0, -150);
//被选中时显示平滑曲线,否则显示非平滑曲线
//根据选择绘制不同的曲线路径
painter.setPen(QPen(QColor(80, 80, 80), 2));
if (ui->showSmoothCurveCheckBox->isChecked()) {
painter.drawPath(smoothCurve);
if (ui->rbtnPathSmooth1->isChecked()) {
painter.drawPath(pathSmooth1);
} else if (ui->rbtnPathSmooth2->isChecked()) {
painter.drawPath(pathSmooth2);
} else {
painter.drawPath(smoothCurve2);
painter.drawPath(pathNormal);
}
//如果曲线上的点可见则显示出来
if (ui->showKnotsCheckBox->isChecked()) {
if (ui->ckShowPoint->isChecked()) {
painter.setPen(Qt::black);
painter.setBrush(Qt::gray);
foreach (QPointF p, datas) {
painter.drawEllipse(p, 3, 3);
foreach (QPointF point, datas) {
painter.drawEllipse(point, 3, 3);
}
}
}