改进平滑曲线
feiyangqingyun
parent
982ee44840
commit
dd4f979511
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@ -98,4 +98,4 @@
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@ -3,8 +3,11 @@
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#include "ui_frmpngtool.h"
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#include "qfile.h"
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#include "qfiledialog.h"
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#include "qdatetime.h"
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#include "qdebug.h"
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#define TIMEMS QTime::currentTime().toString("hh:mm:ss zzz")
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frmPngTool::frmPngTool(QWidget *parent) : QWidget(parent), ui(new Ui::frmPngTool)
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{
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ui->setupUi(this);
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@ -63,7 +66,7 @@ void frmPngTool::on_btnOk_clicked()
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ui->txtMain->clear();
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int count = 0;
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foreach (QString file, files) {
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ui->txtMain->append(file);
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ui->txtMain->append(QString("%1 -> %2").arg(TIMEMS).arg(file));
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QImage image(file);
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image.save(file, "png");
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count++;
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@ -71,5 +74,5 @@ void frmPngTool::on_btnOk_clicked()
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qApp->processEvents();
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}
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ui->txtMain->append(QString("处理完成, 共 %1 个文件").arg(files.count()));
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ui->txtMain->append(QString("%1 -> 处理完成, 共 %2 个文件").arg(TIMEMS).arg(files.count()));
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}
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@ -5,6 +5,8 @@
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#include "qdatetime.h"
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#include "qdebug.h"
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#define TIMEMS QTime::currentTime().toString("hh:mm:ss zzz")
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frmSmoothCurve::frmSmoothCurve(QWidget *parent) : QWidget(parent), ui(new Ui::frmSmoothCurve)
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{
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ui->setupUi(this);
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@ -19,17 +21,27 @@ frmSmoothCurve::frmSmoothCurve(QWidget *parent) : QWidget(parent), ui(new Ui::fr
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x += qMin(qrand() % 30 + 5, 300);
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}
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//根据曲线上的点创建平滑曲线
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smoothCurve = SmoothCurve::createSmoothCurve(datas);
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// 直接连接点的创建非平滑曲线曲线
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smoothCurve2.moveTo(datas[0]);
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//正常曲线
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pathNormal.moveTo(datas.at(0));
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for (int i = 1; i < datas.size(); ++i) {
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smoothCurve2.lineTo(datas[i]);
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pathNormal.lineTo(datas.at(i));
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}
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connect(ui->showKnotsCheckBox, SIGNAL(clicked(bool)), this, SLOT(update()));
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connect(ui->showSmoothCurveCheckBox, SIGNAL(clicked(bool)), this, SLOT(update()));
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//平滑曲线1
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qDebug() << TIMEMS << "createSmoothCurve start";
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pathSmooth1 = SmoothCurve::createSmoothCurve(datas);
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qDebug() << TIMEMS << "createSmoothCurve stop";
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//平滑曲线2
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qDebug() << TIMEMS << "createSmoothCurve2 start";
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pathSmooth2 = SmoothCurve::createSmoothCurve2(datas);
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qDebug() << TIMEMS << "createSmoothCurve2 stop";
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ui->ckShowPoint->setChecked(true);
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connect(ui->ckShowPoint, SIGNAL(clicked(bool)), this, SLOT(update()));
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connect(ui->rbtnPathNormal, SIGNAL(clicked(bool)), this, SLOT(update()));
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connect(ui->rbtnPathSmooth1, SIGNAL(clicked(bool)), this, SLOT(update()));
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connect(ui->rbtnPathSmooth2, SIGNAL(clicked(bool)), this, SLOT(update()));
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}
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frmSmoothCurve::~frmSmoothCurve()
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@ -49,20 +61,22 @@ void frmSmoothCurve::paintEvent(QPaintEvent *)
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painter.drawLine(-250, 0, 250, 0);
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painter.drawLine(0, 150, 0, -150);
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//被选中时显示平滑曲线,否则显示非平滑曲线
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//根据选择绘制不同的曲线路径
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painter.setPen(QPen(QColor(80, 80, 80), 2));
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if (ui->showSmoothCurveCheckBox->isChecked()) {
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painter.drawPath(smoothCurve);
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if (ui->rbtnPathSmooth1->isChecked()) {
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painter.drawPath(pathSmooth1);
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} else if (ui->rbtnPathSmooth2->isChecked()) {
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painter.drawPath(pathSmooth2);
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} else {
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painter.drawPath(smoothCurve2);
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painter.drawPath(pathNormal);
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}
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//如果曲线上的点可见则显示出来
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if (ui->showKnotsCheckBox->isChecked()) {
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if (ui->ckShowPoint->isChecked()) {
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painter.setPen(Qt::black);
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painter.setBrush(Qt::gray);
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foreach (QPointF p, datas) {
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painter.drawEllipse(p, 3, 3);
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foreach (QPointF point, datas) {
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painter.drawEllipse(point, 3, 3);
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}
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}
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}
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@ -24,8 +24,9 @@ protected:
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private:
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Ui::frmSmoothCurve *ui;
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QVector<QPointF> datas; //曲线上的点
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QPainterPath smoothCurve; //平滑曲线
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QPainterPath smoothCurve2; //直接连接点的非平滑曲线
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QPainterPath pathNormal; //正常曲线
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QPainterPath pathSmooth1; //平滑曲线1
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QPainterPath pathSmooth2; //平滑曲线2
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};
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#endif // FRMSMOOTHCURVE_H
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@ -6,15 +6,15 @@
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<rect>
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<x>0</x>
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<y>0</y>
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<width>714</width>
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<height>523</height>
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<width>800</width>
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<height>600</height>
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</rect>
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</property>
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<property name="windowTitle">
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<string>Widget</string>
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</property>
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<layout class="QGridLayout" name="gridLayout">
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<item row="0" column="2">
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<item row="0" column="5">
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<spacer name="verticalSpacer">
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<property name="orientation">
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<enum>Qt::Vertical</enum>
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@ -27,14 +27,28 @@
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</property>
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</spacer>
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</item>
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<item row="1" column="2">
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<widget class="QRadioButton" name="rbtnPathSmooth1">
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<property name="text">
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<string>平滑曲线1</string>
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</property>
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</widget>
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</item>
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<item row="1" column="3">
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<widget class="QRadioButton" name="rbtnPathSmooth2">
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<property name="text">
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<string>平滑曲线2</string>
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</property>
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</widget>
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</item>
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<item row="1" column="0">
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<widget class="QCheckBox" name="showKnotsCheckBox">
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<widget class="QCheckBox" name="ckShowPoint">
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<property name="text">
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<string>显示坐标点</string>
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</property>
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</widget>
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</item>
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<item row="1" column="1">
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<item row="1" column="4">
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<spacer name="horizontalSpacer">
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<property name="orientation">
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<enum>Qt::Horizontal</enum>
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@ -47,10 +61,13 @@
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</property>
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</spacer>
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</item>
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<item row="1" column="2">
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<widget class="QCheckBox" name="showSmoothCurveCheckBox">
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<item row="1" column="1">
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<widget class="QRadioButton" name="rbtnPathNormal">
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<property name="text">
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<string>平滑</string>
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<string>正常曲线</string>
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</property>
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<property name="checked">
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<bool>true</bool>
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</property>
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</widget>
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</item>
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@ -1,4 +1,5 @@
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#include "smoothcurve.h"
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#include "qdebug.h"
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QPainterPath SmoothCurve::createSmoothCurve(const QVector<QPointF> &points)
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{
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@ -20,6 +21,29 @@ QPainterPath SmoothCurve::createSmoothCurve(const QVector<QPointF> &points)
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return path;
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}
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QPainterPath SmoothCurve::createSmoothCurve2(const QVector<QPointF> &points)
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{
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//采用Qt原生方法不做任何处理
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int count = points.count();
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if (count == 0) {
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return QPainterPath();
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}
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QPainterPath path(points.at(0));
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for (int i = 0; i < count - 1; ++i) {
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//控制点的 x 坐标为 sp 与 ep 的 x 坐标和的一半
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//第一个控制点 c1 的 y 坐标为起始点 sp 的 y 坐标
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//第二个控制点 c2 的 y 坐标为结束点 ep 的 y 坐标
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QPointF sp = points.at(i);
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QPointF ep = points.at(i + 1);
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QPointF c1 = QPointF((sp.x() + ep.x()) / 2, sp.y());
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QPointF c2 = QPointF((sp.x() + ep.x()) / 2, ep.y());
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path.cubicTo(c1, c2, ep);
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}
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return path;
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}
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void SmoothCurve::calculateFirstControlPoints(double *&result, const double *rhs, int n)
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{
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result = new double[n];
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@ -1,4 +1,4 @@
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#ifndef SMOOTHCURVE_H
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#ifndef SMOOTHCURVE_H
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#define SMOOTHCURVE_H
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#include <QObject>
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@ -16,6 +16,7 @@ class SmoothCurve : public QObject
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public:
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//创建平滑曲线路径
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static QPainterPath createSmoothCurve(const QVector<QPointF> &points);
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static QPainterPath createSmoothCurve2(const QVector<QPointF> &points);
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private:
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static void calculateFirstControlPoints(double *&result, const double *rhs, int n);
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