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New test case "Loop for start point on line".

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--HG--
branch : develop
This commit is contained in:
Roman Telezhynskyi 2019-08-29 15:14:17 +03:00
parent 205e870669
commit 5dc735b5f4
7 changed files with 1236 additions and 40 deletions
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75
src/libs/vgeometry/vgobject.cpp
View File

@ -41,6 +41,48 @@
#include "../ifc/ifcdef.h"
#include "vgobject_p.h"
namespace
{
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief PerpDotProduct Calculates the area of the parallelogram of the three points.
* This is actually the same as the area of the triangle defined by the three points, multiplied by 2.
* @return 2 * triangleArea(a,b,c)
*/
double PerpDotProduct(const QPointF &p1, const QPointF &p2, const QPointF &t)
{
return (p1.x() - t.x()) * (p2.y() - t.y()) - (p1.y() - t.y()) * (p2.x() - t.x());
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief GetEpsilon solve the floating-point accuraccy problem.
*
* There is the floating-point accuraccy problem, so instead of checking against zero, some epsilon value has to be
* used. Because the size of the pdp value depends on the length of the vectors, no static value can be used. One
* approach is to compare the pdp/area value to the fraction of another area which also depends on the length of the
* line e1=(p1, p2), e.g. the minimal area calucalted with PerpDotProduc() if point still not on the line. This distance
* is controled by variable accuracyPointOnLine
*/
double GetEpsilon(const QPointF &t, QPointF p1, QPointF p2, qreal accuracy)
{
QLineF edge1(p1, p2);
QLineF edge2(p1, t);
if (edge2.length() > edge1.length())
{
edge1.setLength(edge2.length());
p1 = edge1.p1();
p2 = edge1.p2();
}
QLineF line(p1, p2);
line.setAngle(line.angle() + 90);
line.setLength(accuracy); // less than accuracy means the same point
return qAbs(PerpDotProduct(p1, p2, line.p2()));
}
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGObject default constructor.
@ -526,41 +568,12 @@ QPointF VGObject::CorrectDistortion(const QPointF &t, const QPointF &p1, const Q
bool VGObject::IsPointOnLineviaPDP(const QPointF &t, const QPointF &p1, const QPointF &p2, qreal accuracy)
{
const double p = qAbs(PerpDotProduct(p1, p2, t));
const double e = GetEpsilon(p1, p2, accuracy);
const double e = GetEpsilon(t, p1, p2, accuracy);
// We can't use common "<=" here because of the floating-point accuraccy problem
return p < e || VFuzzyComparePossibleNulls(p, e);
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief PerpDotProduct Calculates the area of the parallelogram of the three points.
* This is actually the same as the area of the triangle defined by the three points, multiplied by 2.
* @return 2 * triangleArea(a,b,c)
*/
double VGObject::PerpDotProduct(const QPointF &p1, const QPointF &p2, const QPointF &t)
{
return (p1.x() - t.x()) * (p2.y() - t.y()) - (p1.y() - t.y()) * (p2.x() - t.x());
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief GetEpsilon solve the floating-point accuraccy problem.
*
* There is the floating-point accuraccy problem, so instead of checking against zero, some epsilon value has to be
* used. Because the size of the pdp value depends on the length of the vectors, no static value can be used. One
* approach is to compare the pdp/area value to the fraction of another area which also depends on the length of the
* line e1=(p1, p2), e.g. the minimal area calucalted with PerpDotProduc() if point still not on the line. This distance
* is controled by variable accuracyPointOnLine
*/
double VGObject::GetEpsilon(const QPointF &p1, const QPointF &p2, qreal accuracy)
{
QLineF line(p1, p2);
line.setAngle(line.angle() + 90);
line.setLength(accuracy); // less than accuracy means the same point
return qAbs(PerpDotProduct(p1, p2, line.p2()));
}
//---------------------------------------------------------------------------------------------------------------------
int VGObject::PointInCircle(const QPointF &p, const QPointF &center, qreal radius)
{

3
src/libs/vgeometry/vgobject.h
View File

@ -114,9 +114,6 @@ protected:
private:
QSharedDataPointer<VGObjectData> d;
static double PerpDotProduct(const QPointF &p1, const QPointF &p2, const QPointF &t);
static double GetEpsilon(const QPointF &p1, const QPointF &p2, qreal accuracy);
static int PointInCircle (const QPointF &p, const QPointF &center, qreal radius);
};

41
src/libs/vlayout/vabstractpiece.h
View File

@ -279,6 +279,7 @@ QVector<T> VAbstractPiece::CorrectEquidistantPoints(const QVector<T> &points, bo
}
int prev = -1;
int next = -1;
QVector<T> buf2;
//Remove point on line
@ -287,25 +288,53 @@ QVector<T> VAbstractPiece::CorrectEquidistantPoints(const QVector<T> &points, bo
// Unfortunatelly QLineF::intersect can't be used in this case because of the floating-point accuraccy problem.
if (prev == -1)
{
prev = (i == 0) ? buf1.size() - 1 : i-1;
if (i == 0)
{
prev = buf1.size() - 1;
const T &prevPoint = buf1.at(prev);
const T &iPoint = buf1.at(i);
if (iPoint == prevPoint)
{
prev = buf1.size() - 2;
}
}
else
{
prev = i-1;
}
}
const int next = (i == buf1.size() - 1) ? 0 : i+1;
if (i == buf1.size() - 1)
{
next = 0;
const T &nextPoint = buf1.at(next);
const T &iPoint = buf1.at(i);
if (iPoint == nextPoint)
{
next = 1;
}
}
else
{
next = i+1;
}
const T &iPoint = buf1.at(i);
const T &prevPoint = buf1.at(prev);
const T &nextPoint = buf1.at(next);
if (not (IsEkvPointOnLine(iPoint, prevPoint, nextPoint) && prevPoint == nextPoint/*not zigzag*/)
// If RemoveDublicates does not remove these points it is a valid case.
// Case where last point equal first point
|| ((i == 0 || i == buf1.size() - 1) && (iPoint == prevPoint || iPoint == nextPoint)))
if (not IsEkvPointOnLine(iPoint, prevPoint, nextPoint))
{
buf2.append(iPoint);
prev = -1;
}
}
if (buf2.first() != buf2.last())
{
buf2.append(buf2.first());
}
buf2 = RemoveDublicates(buf2, false);
return buf2;

640
src/test/ValentinaTest/share/loop_start_point_on_line/input.json Normal file
View File

@ -0,0 +1,640 @@
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509
src/test/ValentinaTest/share/loop_start_point_on_line/output.json Normal file
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@ -0,0 +1,509 @@
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}

2
src/test/ValentinaTest/share/test_data.qrc
View File

@ -4,5 +4,7 @@
<file>Issue_620/output.json</file>
<file>loop_by_intersection/input.json</file>
<file>loop_by_intersection/output.json</file>
<file>loop_start_point_on_line/input.json</file>
<file>loop_start_point_on_line/output.json</file>
</qresource>
</RCC>

6
src/test/ValentinaTest/tst_vabstractpiece.cpp
View File

@ -202,6 +202,12 @@ void TST_VAbstractPiece::EquidistantRemoveLoop_data()
QStringLiteral("://loop_by_intersection/input.json"),
QStringLiteral("://loop_by_intersection/output.json"),
39.685039370078741 /*seam allowance width (1.05 cm)*/);
// See file src/app/share/collection/bugs/loop_start_point_on_line.val (private collection)
ASSERT_TEST_CASE("Loop for start point on line",
QStringLiteral("://loop_start_point_on_line/input.json"),
QStringLiteral("://loop_start_point_on_line/output.json"),
37.795275590551185 /*seam allowance width (1.0 cm)*/);
}
//---------------------------------------------------------------------------------------------------------------------