qt-everywhere-src-5.15.1/qtbase/examples/widgets/animation/stickman/stickman.cpp - orbit - Git at Google

 /****************************************************************************
 **
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and The Qt Company. For licensing terms
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
 ** BSD License Usage
 ** Alternatively, you may use this file under the terms of the BSD license
 ** as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of The Qt Company Ltd nor the names of its
 **     contributors may be used to endorse or promote products derived
 **     from this software without specific prior written permission.
 **
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include "stickman.h"
 #include "node.h"

 #include <QPainter>
 #include <QtMath>

 static constexpr qreal Coords[NodeCount * 2] = {
     0.0, -150.0, // head, #0

     0.0, -100.0, // body pentagon, top->bottom, left->right, #1 - 5
     -50.0, -50.0,
     50.0, -50.0,
     -25.0, 50.0,
     25.0, 50.0,

     -100.0, 0.0, // right arm, #6 - 7
     -125.0, 50.0,

     100.0, 0.0, // left arm, #8 - 9
     125.0, 50.0,

     -35.0, 75.0, // lower body, #10 - 11
     35.0, 75.0,

     -25.0, 200.0, // right leg, #12 - 13
     -30.0, 300.0,

     25.0, 200.0, // left leg, #14 - 15
     30.0, 300.0

 };

 static constexpr int Bones[BoneCount * 2] = {
     0, 1, // neck

     1, 2, // body
     1, 3,
     1, 4,
     1, 5,
     2, 3,
     2, 4,
     2, 5,
     3, 4,
     3, 5,
     4, 5,

     2, 6, // right arm
     6, 7,

     3, 8, // left arm
     8, 9,

     4, 10, // lower body
     4, 11,
     5, 10,
     5, 11,
     10, 11,

     10, 12, // right leg
     12, 13,

     11, 14, // left leg
     14, 15

 };

 StickMan::StickMan()
 {
     // Set up start position of limbs
     for (int i = 0; i < NodeCount; ++i) {
         m_nodes[i] = new Node(QPointF(Coords[i * 2], Coords[i * 2 + 1]), this);
         connect(m_nodes[i], &Node::positionChanged, this, &StickMan::childPositionChanged);
     }

     for (int i = 0; i < BoneCount; ++i) {
         int n1 = Bones[i * 2];
         int n2 = Bones[i * 2 + 1];

         Node *node1 = m_nodes[n1];
         Node *node2 = m_nodes[n2];

         QPointF dist = node1->pos() - node2->pos();
         m_perfectBoneLengths[i] = sqrt(pow(dist.x(), 2) + pow(dist.y(), 2));
     }

     startTimer(10);
 }

 void StickMan::childPositionChanged()
 {
     prepareGeometryChange();
 }

 void StickMan::setDrawSticks(bool on)
 {
     m_sticks = on;
     for (int i = 0; i < nodeCount(); ++i) {
         Node *node = m_nodes[i];
         node->setVisible(on);
     }
 }

 QRectF StickMan::boundingRect() const
 {
     // account for head radius=50.0 plus pen which is 5.0
     return childrenBoundingRect().adjusted(-55.0, -55.0, 55.0, 55.0);
 }

 int StickMan::nodeCount() const
 {
     return NodeCount;
 }

 Node *StickMan::node(int idx) const
 {
     if (idx >= 0 && idx < NodeCount)
         return m_nodes[idx];
     return nullptr;
 }

 void StickMan::timerEvent(QTimerEvent *)
 {
     update();
 }

 void StickMan::stabilize()
 {
     static const qreal threshold = 0.001;

     for (int i = 0; i < BoneCount; ++i) {
         int n1 = Bones[i * 2];
         int n2 = Bones[i * 2 + 1];

         Node *node1 = m_nodes[n1];
         Node *node2 = m_nodes[n2];

         QPointF pos1 = node1->pos();
         QPointF pos2 = node2->pos();

         QPointF dist = pos1 - pos2;
         qreal length = sqrt(pow(dist.x(),2) + pow(dist.y(),2));
         qreal diff = (length - m_perfectBoneLengths[i]) / length;

         QPointF p = dist * (0.5 * diff);
         if (p.x() > threshold && p.y() > threshold) {
             pos1 -= p;
             pos2 += p;

             node1->setPos(pos1);
             node2->setPos(pos2);
         }
     }
 }

 QPointF StickMan::posFor(int idx) const
 {
     return m_nodes[idx]->pos();
 }

 //#include <QTime>
 void StickMan::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
 {
   /*  static int frames = 0;
     static QTime time;
     if (frames++ % 100 == 0) {
         frames = 1;
         time.restart();
     }

     if (time.elapsed() > 0) {
         painter->setPen(Qt::white);
         painter->drawText(0, 0, QString::number(frames / (time.elapsed() / 1000.0)));
     }*/

     stabilize();
     if (m_sticks) {
         painter->setPen(Qt::white);
         for (int i = 0; i < BoneCount; ++i) {
             int n1 = Bones[i * 2];
             int n2 = Bones[i * 2 + 1];

             Node *node1 = m_nodes[n1];
             Node *node2 = m_nodes[n2];

             painter->drawLine(node1->pos(), node2->pos());
         }
     } else {
         // first bone is neck and will be used for head

         QPainterPath path;
         path.moveTo(posFor(0));
         path.lineTo(posFor(1));

         // right arm
         path.lineTo(posFor(2));
         path.lineTo(posFor(6));
         path.lineTo(posFor(7));

         // left arm
         path.moveTo(posFor(3));
         path.lineTo(posFor(8));
         path.lineTo(posFor(9));

         // body
         path.moveTo(posFor(2));
         path.lineTo(posFor(4));
         path.lineTo(posFor(10));
         path.lineTo(posFor(11));
         path.lineTo(posFor(5));
         path.lineTo(posFor(3));
         path.lineTo(posFor(1));

         // right leg
         path.moveTo(posFor(10));
         path.lineTo(posFor(12));
         path.lineTo(posFor(13));

         // left leg
         path.moveTo(posFor(11));
         path.lineTo(posFor(14));
         path.lineTo(posFor(15));

         painter->setPen(QPen(m_penColor, 5.0, Qt::SolidLine, Qt::RoundCap));
         painter->drawPath(path);

         {
             int n1 = Bones[0];
             int n2 = Bones[1];
             Node *node1 = m_nodes[n1];
             Node *node2 = m_nodes[n2];

             QPointF dist = node2->pos() - node1->pos();

             qreal sinAngle = dist.x() / sqrt(pow(dist.x(), 2) + pow(dist.y(), 2));
             qreal angle = qRadiansToDegrees(asin(sinAngle));

             QPointF headPos = node1->pos();
             painter->translate(headPos);
             painter->rotate(-angle);

             painter->setBrush(m_fillColor);
             painter->drawEllipse(QPointF(0,0), 50.0, 50.0);

             painter->setBrush(m_penColor);
             painter->setPen(QPen(m_penColor, 2.5, Qt::SolidLine, Qt::RoundCap));

             // eyes
             if (m_isDead) {
                 painter->drawLine(-30.0, -30.0, -20.0, -20.0);
                 painter->drawLine(-20.0, -30.0, -30.0, -20.0);

                 painter->drawLine(20.0, -30.0, 30.0, -20.0);
                 painter->drawLine(30.0, -30.0, 20.0, -20.0);
             } else {
                 painter->drawChord(QRectF(-30.0, -30.0, 25.0, 70.0), 30.0*16, 120.0*16);
                 painter->drawChord(QRectF(5.0, -30.0, 25.0, 70.0), 30.0*16, 120.0*16);
             }

             // mouth
             if (m_isDead) {
                 painter->drawLine(-28.0, 2.0, 29.0, 2.0);
             } else {
                 painter->setBrush(QColor(128, 0, 64 ));
                 painter->drawChord(QRectF(-28.0, 2.0-55.0/2.0, 57.0, 55.0), 0.0, -180.0*16);
             }

             // pupils
             if (!m_isDead) {
                 painter->setPen(QPen(m_fillColor, 1.0, Qt::SolidLine, Qt::RoundCap));
                 painter->setBrush(m_fillColor);
                 painter->drawEllipse(QPointF(-12.0, -25.0), 5.0, 5.0);
                 painter->drawEllipse(QPointF(22.0, -25.0), 5.0, 5.0);
             }
         }
     }
 }
	/****************************************************************************
	**
	** Copyright (C) 2016 The Qt Company Ltd.
	** Contact: https://www.qt.io/licensing/
	**
	** This file is part of the QtCore module of the Qt Toolkit.
	**
	** $QT_BEGIN_LICENSE:BSD$
	** Commercial License Usage
	** Licensees holding valid commercial Qt licenses may use this file in
	** accordance with the commercial license agreement provided with the
	** Software or, alternatively, in accordance with the terms contained in
	** a written agreement between you and The Qt Company. For licensing terms
	** and conditions see https://www.qt.io/terms-conditions. For further
	** information use the contact form at https://www.qt.io/contact-us.
	**
	** BSD License Usage
	** Alternatively, you may use this file under the terms of the BSD license
	** as follows:
	**
	** "Redistribution and use in source and binary forms, with or without
	** modification, are permitted provided that the following conditions are
	** met:
	** * Redistributions of source code must retain the above copyright
	** notice, this list of conditions and the following disclaimer.
	** * Redistributions in binary form must reproduce the above copyright
	** notice, this list of conditions and the following disclaimer in
	** the documentation and/or other materials provided with the
	** distribution.
	** * Neither the name of The Qt Company Ltd nor the names of its
	** contributors may be used to endorse or promote products derived
	** from this software without specific prior written permission.
	**
	**
	** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
	**
	** $QT_END_LICENSE$
	**
	****************************************************************************/

	#include "stickman.h"
	#include "node.h"

	#include <QPainter>
	#include <QtMath>

	static constexpr qreal Coords[NodeCount * 2] = {
	0.0, -150.0, // head, #0

	0.0, -100.0, // body pentagon, top->bottom, left->right, #1 - 5
	-50.0, -50.0,
	50.0, -50.0,
	-25.0, 50.0,
	25.0, 50.0,

	-100.0, 0.0, // right arm, #6 - 7
	-125.0, 50.0,

	100.0, 0.0, // left arm, #8 - 9
	125.0, 50.0,

	-35.0, 75.0, // lower body, #10 - 11
	35.0, 75.0,

	-25.0, 200.0, // right leg, #12 - 13
	-30.0, 300.0,

	25.0, 200.0, // left leg, #14 - 15
	30.0, 300.0

	};

	static constexpr int Bones[BoneCount * 2] = {
	0, 1, // neck

	1, 2, // body
	1, 3,
	1, 4,
	1, 5,
	2, 3,
	2, 4,
	2, 5,
	3, 4,
	3, 5,
	4, 5,

	2, 6, // right arm
	6, 7,

	3, 8, // left arm
	8, 9,

	4, 10, // lower body
	4, 11,
	5, 10,
	5, 11,
	10, 11,

	10, 12, // right leg
	12, 13,

	11, 14, // left leg
	14, 15

	};

	StickMan::StickMan()
	{
	// Set up start position of limbs
	for (int i = 0; i < NodeCount; ++i) {
	m_nodes[i] = new Node(QPointF(Coords[i * 2], Coords[i * 2 + 1]), this);
	connect(m_nodes[i], &Node::positionChanged, this, &StickMan::childPositionChanged);
	}

	for (int i = 0; i < BoneCount; ++i) {
	int n1 = Bones[i * 2];
	int n2 = Bones[i * 2 + 1];

	Node *node1 = m_nodes[n1];
	Node *node2 = m_nodes[n2];

	QPointF dist = node1->pos() - node2->pos();
	m_perfectBoneLengths[i] = sqrt(pow(dist.x(), 2) + pow(dist.y(), 2));
	}

	startTimer(10);
	}

	void StickMan::childPositionChanged()
	{
	prepareGeometryChange();
	}

	void StickMan::setDrawSticks(bool on)
	{
	m_sticks = on;
	for (int i = 0; i < nodeCount(); ++i) {
	Node *node = m_nodes[i];
	node->setVisible(on);
	}
	}

	QRectF StickMan::boundingRect() const
	{
	// account for head radius=50.0 plus pen which is 5.0
	return childrenBoundingRect().adjusted(-55.0, -55.0, 55.0, 55.0);
	}

	int StickMan::nodeCount() const
	{
	return NodeCount;
	}

	Node *StickMan::node(int idx) const
	{
	if (idx >= 0 && idx < NodeCount)
	return m_nodes[idx];
	return nullptr;
	}

	void StickMan::timerEvent(QTimerEvent *)
	{
	update();
	}

	void StickMan::stabilize()
	{
	static const qreal threshold = 0.001;

	for (int i = 0; i < BoneCount; ++i) {
	int n1 = Bones[i * 2];
	int n2 = Bones[i * 2 + 1];

	Node *node1 = m_nodes[n1];
	Node *node2 = m_nodes[n2];

	QPointF pos1 = node1->pos();
	QPointF pos2 = node2->pos();

	QPointF dist = pos1 - pos2;
	qreal length = sqrt(pow(dist.x(),2) + pow(dist.y(),2));
	qreal diff = (length - m_perfectBoneLengths[i]) / length;

	QPointF p = dist * (0.5 * diff);
	if (p.x() > threshold && p.y() > threshold) {
	pos1 -= p;
	pos2 += p;

	node1->setPos(pos1);
	node2->setPos(pos2);
	}
	}
	}

	QPointF StickMan::posFor(int idx) const
	{
	return m_nodes[idx]->pos();
	}

	//#include <QTime>
	void StickMan::paint(QPainter painter, const QStyleOptionGraphicsItem , QWidget *)
	{
	/* static int frames = 0;
	static QTime time;
	if (frames++ % 100 == 0) {
	frames = 1;
	time.restart();
	}

	if (time.elapsed() > 0) {
	painter->setPen(Qt::white);
	painter->drawText(0, 0, QString::number(frames / (time.elapsed() / 1000.0)));
	}*/

	stabilize();
	if (m_sticks) {
	painter->setPen(Qt::white);
	for (int i = 0; i < BoneCount; ++i) {
	int n1 = Bones[i * 2];
	int n2 = Bones[i * 2 + 1];

	Node *node1 = m_nodes[n1];
	Node *node2 = m_nodes[n2];

	painter->drawLine(node1->pos(), node2->pos());
	}
	} else {
	// first bone is neck and will be used for head

	QPainterPath path;
	path.moveTo(posFor(0));
	path.lineTo(posFor(1));

	// right arm
	path.lineTo(posFor(2));
	path.lineTo(posFor(6));
	path.lineTo(posFor(7));

	// left arm
	path.moveTo(posFor(3));
	path.lineTo(posFor(8));
	path.lineTo(posFor(9));

	// body
	path.moveTo(posFor(2));
	path.lineTo(posFor(4));
	path.lineTo(posFor(10));
	path.lineTo(posFor(11));
	path.lineTo(posFor(5));
	path.lineTo(posFor(3));
	path.lineTo(posFor(1));

	// right leg
	path.moveTo(posFor(10));
	path.lineTo(posFor(12));
	path.lineTo(posFor(13));

	// left leg
	path.moveTo(posFor(11));
	path.lineTo(posFor(14));
	path.lineTo(posFor(15));

	painter->setPen(QPen(m_penColor, 5.0, Qt::SolidLine, Qt::RoundCap));
	painter->drawPath(path);

	{
	int n1 = Bones[0];
	int n2 = Bones[1];
	Node *node1 = m_nodes[n1];
	Node *node2 = m_nodes[n2];

	QPointF dist = node2->pos() - node1->pos();

	qreal sinAngle = dist.x() / sqrt(pow(dist.x(), 2) + pow(dist.y(), 2));
	qreal angle = qRadiansToDegrees(asin(sinAngle));

	QPointF headPos = node1->pos();
	painter->translate(headPos);
	painter->rotate(-angle);

	painter->setBrush(m_fillColor);
	painter->drawEllipse(QPointF(0,0), 50.0, 50.0);

	painter->setBrush(m_penColor);
	painter->setPen(QPen(m_penColor, 2.5, Qt::SolidLine, Qt::RoundCap));

	// eyes
	if (m_isDead) {
	painter->drawLine(-30.0, -30.0, -20.0, -20.0);
	painter->drawLine(-20.0, -30.0, -30.0, -20.0);

	painter->drawLine(20.0, -30.0, 30.0, -20.0);
	painter->drawLine(30.0, -30.0, 20.0, -20.0);
	} else {
	painter->drawChord(QRectF(-30.0, -30.0, 25.0, 70.0), 30.016, 120.016);
	painter->drawChord(QRectF(5.0, -30.0, 25.0, 70.0), 30.016, 120.016);
	}

	// mouth
	if (m_isDead) {
	painter->drawLine(-28.0, 2.0, 29.0, 2.0);
	} else {
	painter->setBrush(QColor(128, 0, 64 ));
	painter->drawChord(QRectF(-28.0, 2.0-55.0/2.0, 57.0, 55.0), 0.0, -180.0*16);
	}

	// pupils
	if (!m_isDead) {
	painter->setPen(QPen(m_fillColor, 1.0, Qt::SolidLine, Qt::RoundCap));
	painter->setBrush(m_fillColor);
	painter->drawEllipse(QPointF(-12.0, -25.0), 5.0, 5.0);
	painter->drawEllipse(QPointF(22.0, -25.0), 5.0, 5.0);
	}
	}
	}
	}