QT - qwtplot3d-3D图标
一、演示效果
二、关键程序
c
#include "qwt3d_axis.h"
using namespace Qwt3D;
Axis::Axis()
{
init();
};
Axis::~Axis()
{
}
Axis::Axis(Triple beg, Triple end)
{
init();
setPosition(beg,end);
}
void Axis::init()
{
detachAll();
scale_ = qwt3d_ptr<Scale>(new LinearScale);
beg_ = Triple(0.0, 0.0, 0.0);
end_ = beg_;
majorintervals_ = 0;
minorintervals_ = 0;
setMajors(1);
setMinors(1);
setLimits(0,0);
setTicOrientation(0.0, 0.0, 0.0);
setTicLength(0.0, 0.0);
setColor(0.0, 0.0, 0.0);
setLineWidth(1.0);
symtics_ = false;
drawNumbers_ = false;
drawLabel_ = false;
drawTics_ = false;
autoscale_ = true;
markerLabel_.clear();
numberfont_ = QFont("Courier",12);
setLabelFont(QFont("Courier",14));
numbercolor_ = RGBA(0,0,0,0);
setNumberAnchor(Center);
numbergap_ = 0;
labelgap_ = 0;
}
void Axis::setPosition(const Triple& beg, const Triple& end)
{
beg_ = beg;
end_ = end;
}
void Axis::setMajors(int val)
{
if (val == majorintervals_)
return;
majorintervals_ = (val<=0) ? 1 : val; // always >= 1
}
/*!
\see LogScale::setMinors().
*/
void Axis::setMinors(int val)
{
if (val == minorintervals_)
return;
minorintervals_ = (val<=0) ? 1 : val; // always >= 1
}
void Axis::setTicLength(double majorl, double minorl)
{
lmaj_ = majorl;
lmin_ = minorl;
}
void Axis::setTicOrientation(double tx, double ty, double tz)
{
setTicOrientation(Triple(tx,ty,tz));
}
void Axis::setTicOrientation(const Triple& val)
{
orientation_ = val;
orientation_.normalize();
}
/**
\param val thickness for axis base line
\param majfac relative thickness for axis major tics (majfac*val)
\param minfac relative thickness for axis minor tics (minfac*val)
*/
void Axis::setLineWidth(double val, double majfac, double minfac)
{
lineWidth_ = val;
majLineWidth_ = majfac * lineWidth_;
minLineWidth_ = minfac * lineWidth_;
}
void Axis::draw()
{
Drawable::draw();
saveGLState();
// GLStateBewarer sb(GL_LINE_SMOOTH, true);
// glBlendFunc(GL_ONE, GL_ZERO);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glColor4d(color.r,color.g,color.b,color.a);
drawBase();
drawTics();
drawLabel();
restoreGLState();
}
/**
Always use AFTER drawNumbers() ! (Needs length of number string)
*/
void Axis::drawLabel()
{
if (!drawLabel_)
return;
Triple diff = end() - begin();
Triple center = begin() + diff/2;
Triple bnumber = biggestNumberString();
// double fac = 6*(second()-first()).length() / 100;
switch (scaleNumberAnchor_)
{
case BottomLeft:
case TopLeft:
case CenterLeft:
bnumber.y = 0;
break;
case BottomRight:
case TopRight:
case CenterRight:
bnumber.x = -bnumber.x;
bnumber.y = 0;
break;
case TopCenter:
bnumber.x = 0;
bnumber.y = -bnumber.y;
break;
case BottomCenter:
bnumber.x = 0;
break;
default:
break;
}
Triple pos = ViewPort2World(World2ViewPort(center + ticOrientation() * lmaj_) + bnumber);
setLabelPosition(pos, scaleNumberAnchor_);
label_.adjust(labelgap_);
label_.draw();
}
void Axis::drawBase()
{
setDeviceLineWidth( lineWidth_ );
glBegin( GL_LINES );
glVertex3d( beg_.x, beg_.y, beg_.z);
glVertex3d( end_.x, end_.y, end_.z);
glEnd();
}
bool Axis::prepTicCalculation(Triple& startpoint)
{
if (isPracticallyZero(start_, stop_))
return false;
autostart_ = start_;
autostop_ = stop_;
if (autoScale())
{
setMajors(scale_->autoscale(autostart_, autostop_, start_, stop_, majors()));
if (isPracticallyZero(autostart_, autostop_))
return false;
}
scale_->setLimits(start_,stop_);
scale_->setMajors(majors());
scale_->setMinors(minors());
scale_->setMajorLimits(autostart_,autostop_);
scale_->calculate();
Triple normal = (end_ - beg_);
//normal.normalize();
Triple beg = beg_ + ((autostart_ - start_) / (stop_ - start_)) * normal;
Triple end = end_ - ((stop_ - autostop_) / (stop_ - start_))* normal;
startpoint = end_ - beg_;
majorpos_.clear();
minorpos_.clear();
return true;
}
void Axis::recalculateTics()
{
Triple runningpoint;
if (false==prepTicCalculation(runningpoint))
return;
unsigned int i;
for (i = 0; i != scale_->majors_p.size(); ++i)
{
double t = (scale_->majors_p[i] - start_) / (stop_-start_);
majorpos_.push_back(beg_ + t * runningpoint);
}
for (i = 0; i != scale_->minors_p.size(); ++i)
{
double t = (scale_->minors_p[i] - start_) / (stop_-start_);
minorpos_.push_back(beg_ + t * runningpoint);
}
}
void Axis::drawTics()
{
Triple runningpoint;
if (!drawTics_ || false==prepTicCalculation(runningpoint))
return;
unsigned int i;
Triple nadir;
markerLabel_.resize(scale_->majors_p.size());
setDeviceLineWidth(majLineWidth_);
for (i = 0; i != scale_->majors_p.size(); ++i)
{
double t = (scale_->majors_p[i] - start_) / (stop_-start_);
nadir = beg_ + t * runningpoint;
majorpos_.push_back(drawTic(nadir, lmaj_));
drawTicLabel(nadir + 1.2 * lmaj_ * orientation_, i);
}
setDeviceLineWidth(minLineWidth_);
for (i = 0; i != scale_->minors_p.size(); ++i)
{
double t = (scale_->minors_p[i] - start_) / (stop_-start_);
nadir = beg_ + t * runningpoint;
minorpos_.push_back(drawTic(nadir, lmin_));
}
}
void Axis::drawTicLabel(Triple pos, int mtic)
{
if (!drawNumbers_ || (mtic < 0))
return;
markerLabel_[mtic].setFont(numberfont_.family(), numberfont_.pointSize(), numberfont_.weight(), numberfont_.italic());
markerLabel_[mtic].setColor(numbercolor_);
markerLabel_[mtic].setString(scale_->ticLabel(mtic));
markerLabel_[mtic].setPosition(pos, scaleNumberAnchor_);
markerLabel_[mtic].adjust(numbergap_);
markerLabel_[mtic].draw();
}
Triple Axis::drawTic(Triple nadir, double length)
{
double ilength = (symtics_) ? -length : 0.0;
glBegin( GL_LINES );
glVertex3d( nadir.x + ilength * orientation_.x,
nadir.y + ilength * orientation_.y,
nadir.z + ilength * orientation_.z) ;
glVertex3d( nadir.x + length * orientation_.x,
nadir.y + length * orientation_.y,
nadir.z + length * orientation_.z);
glEnd();
return nadir;
}
void Axis::setNumberFont(QString const& family, int pointSize, int weight, bool italic)
{
numberfont_ = QFont(family, pointSize, weight, italic );
}
void Axis::setNumberFont(QFont const& font)
{
numberfont_ = font;
}
void Axis::setNumberColor(RGBA col)
{
numbercolor_ = col;
}
void Axis::setLabelFont(QString const& family, int pointSize, int weight, bool italic)
{
labelfont_ = QFont(family, pointSize, weight, italic );
label_.setFont(family, pointSize, weight, italic);
}
void Axis::setLabelFont(QFont const& font)
{
setLabelFont(font.family(), font.pointSize(), font.weight(), font.italic());
}
void Axis::setLabelString(QString const& name)
{
label_.setString(name);
}
/*!
Sets label position in conjunction with an anchoring strategy
*/
void Axis::setLabelPosition(const Triple& pos,Qwt3D::ANCHOR an)
{
label_.setPosition(pos, an);
}
//! Sets color for label
void Axis::setLabelColor(RGBA col)
{
label_.setColor(col);
}
Triple Axis::biggestNumberString()
{
Triple ret;
unsigned size = markerLabel_.size();
double width, height;
for (unsigned i=0; i!=size; ++i)
{
width = fabs( (World2ViewPort(markerLabel_[i].second())-World2ViewPort(markerLabel_[i].first())).x );
height = fabs( (World2ViewPort(markerLabel_[i].second())-World2ViewPort(markerLabel_[i].first())).y );
if (width > ret.x)
ret.x = width + markerLabel_[i].gap();
if (height > ret.y)
ret.y = height + markerLabel_[i].gap();;
}
return ret;
}
/*!
This variant sets a user-defined scale object.
Use with a heap based initialized pointer only.
The axis adopts ownership.
*/
void Axis::setScale(Scale* val)
{
scale_ = qwt3d_ptr<Scale>(val);
}
/*!
Sets one of the predefined scaling types.
\warning Too small intervals in logarithmic scales lead to
empty scales (or perhaps a scale only containing an isolated
major tic). Better switch to linear scales in such cases.
*/
void Axis::setScale(Qwt3D::SCALETYPE val)
{
switch(val) {
case Qwt3D::LINEARSCALE:
setScale(new LinearScale);
break;
case Qwt3D::LOG10SCALE:
setScale(new LogScale);
setMinors(9);
break;
default:
break;
}
}三、下载链接
https://download.csdn.net/download/u013083044/88745622?spm=1001.2014.3001.5503