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polytest2.C File Reference

Detailed Description

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This macro is testing the "compacting" algorithm in TPadPainter.

It reduces the number of polygon's vertices using actual pixel coordinates.

This macro is testing new "compacting" algorithm in TPadPainter (it reduces the number of polygon's vertices using actual pixel coordinates). In principle, this test case is what our histograms (fringe cases) are: "saw-like" polygon (bins == teeth).

//Includes for ACLiC.
#include <cassert>
#include <vector>
#include "TRandom.h"
#include "TCanvas.h"
#include "Rtypes.h"
#include "TNamed.h"
class PolyTest2 : public TNamed, public TAttLine, public TAttFill {
public:
PolyTest2();
void Paint(const Option_t *notUsed);
private:
enum TestSize {
kNSawPoints = 10000
};
//Part 1.
std::vector<Double_t> fXs1;
std::vector<Double_t> fYs1;
//Part 2.
std::vector<Double_t> fXs2;
std::vector<Double_t> fYs2;
};
//_____________________________________________________________
PolyTest2::PolyTest2()
: TNamed("polygon_compression_test2", "polygon_compression_test2")
{
//Polygon 1, n of points is 10003, after 'compression' : 1897
//Polygon 2, n of points is 10003, after 'compression' : 2093
//Some canvas must already exist by this point.
assert(gPad != 0 && "PolyTest2, gPad is null");
//We need a gRandom to exist.
assert(gRandom != 0 && "PolyTest2, gRandom is null");
Double_t xMin = 0., xMax = 0., yMin = 0., yMax = 0.;
gPad->GetRange(xMin, yMin, xMax, yMax);
assert(xMax - xMin > 0 && yMax - yMin > 0 && "PolyTest2, invalid canvas' ranges");
// .(0/the last)--------.(1)
// | /
// | \
// | /
// .(kNSawPoints + 1)--.(kNSawPoints)
const unsigned nVertices = 3 + kNSawPoints;
{
//Polygon 1, "vertical saw":
fXs1.resize(nVertices);
fYs1.resize(nVertices);
fXs1[0] = 0.;
fYs1[0] = 0.;
const Double_t w1 = 0.2 * (xMax - xMin);
const Double_t saw1ToothSize = 0.1 * w1;
const Double_t yStep = (yMax - yMin) / (kNSawPoints - 1);
for (unsigned i = 1; i <= kNSawPoints; ++i) {
fXs1[i] = w1 + gRandom->Rndm() * saw1ToothSize;
fYs1[i] = yMin + yStep * (i - 1);
}
fXs1[nVertices - 2] = 0.;
fYs1[nVertices - 2] = yMax;
//Let's close it.
fXs1[nVertices - 1] = fXs1[0];
fYs1[nVertices - 1] = fYs1[0];
}
//Polygon 2, "horizontal saw":
{
const Double_t x2Min = xMin + 0.25 * (xMax - xMin);
const Double_t h2 = 0.1 * (yMax - yMin);
const Double_t saw2ToothSize = 0.1 * h2;
const Double_t xStep = (xMax - x2Min) / (kNSawPoints - 1);
fXs2.resize(nVertices);
fYs2.resize(nVertices);
fXs2[0] = x2Min;
fYs2[0] = 0.;
for (unsigned i = 1; i <= kNSawPoints; ++i) {
fXs2[i] = x2Min + xStep * i;
fYs2[i] = h2 + gRandom->Rndm() * saw2ToothSize;
}
fXs2[nVertices - 2] = xMax;
fYs2[nVertices - 2] = 0.;
fXs2[nVertices - 1] = fXs2[0];
fYs2[nVertices - 1] = fYs2[0];
}
}
//_____________________________________________________________
void PolyTest2::Paint(const Option_t * /*notUsed*/)
{
assert(gPad != 0 && "Paint, gPad is null");
gPad->PaintFillArea((Int_t)fXs1.size(), &fXs1[0], &fYs1[0]);
gPad->PaintPolyLine((Int_t)fXs1.size(), &fXs1[0], &fYs1[0]);
gPad->PaintFillArea((Int_t)fXs2.size(), &fXs2[0], &fYs2[0]);
gPad->PaintPolyLine((Int_t)fXs2.size(), &fXs2[0], &fYs2[0]);
}
void polytest2()
{
TCanvas * const cnv = new TCanvas;
cnv->cd();
PolyTest2 * polygon = new PolyTest2;
polygon->Draw();//Attach a polygon to a canvas.
}
int Int_t
Definition RtypesCore.h:45
double Double_t
Definition RtypesCore.h:59
const char Option_t
Definition RtypesCore.h:66
@ kOrange
Definition Rtypes.h:67
@ kGreen
Definition Rtypes.h:66
@ kMagenta
Definition Rtypes.h:66
@ kBlue
Definition Rtypes.h:66
Option_t Option_t SetLineColor
Option_t Option_t SetFillColor
R__EXTERN TRandom * gRandom
Definition TRandom.h:62
#define gPad
Fill Area Attributes class.
Definition TAttFill.h:19
virtual void Modify()
Change current fill area attributes if necessary.
Definition TAttFill.cxx:213
Line Attributes class.
Definition TAttLine.h:18
virtual void Modify()
Change current line attributes if necessary.
Definition TAttLine.cxx:245
The Canvas class.
Definition TCanvas.h:23
TVirtualPad * cd(Int_t subpadnumber=0) override
Set current canvas & pad.
Definition TCanvas.cxx:714
The TNamed class is the base class for all named ROOT classes.
Definition TNamed.h:29
virtual void Paint(Option_t *option="")
This method must be overridden if a class wants to paint itself.
Definition TObject.cxx:601
Double_t Rndm() override
Machine independent random number generator.
Definition TRandom.cxx:552
Author
Timur Pocheptsov

Definition in file polytest2.C.