Krita Source Code Documentation
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Static Public Member Functions | Private Member Functions | List of all members
KisPerspectiveMath Class Reference

#include <kis_perspective_math.h>

Static Public Member Functions

static Matrix3qreal computeMatrixTransfo (const QPointF &topLeft1, const QPointF &topRight1, const QPointF &bottomLeft1, const QPointF &bottomRight1, const QPointF &topLeft2, const QPointF &topRight2, const QPointF &bottomLeft2, const QPointF &bottomRight2)
 
static Matrix3qreal computeMatrixTransfoFromPerspective (const QRect &r, const QPointF &topLeft, const QPointF &topRight, const QPointF &bottomLeft, const QPointF &bottomRight)
 
static Matrix3qreal computeMatrixTransfoToPerspective (const QPointF &topLeft, const QPointF &topRight, const QPointF &bottomLeft, const QPointF &bottomRight, const QRect &r)
 
static QPointF matProd (const Matrix3qreal &m, const QPointF &p)
 TODO: get rid of this in 2.0.
 

Private Member Functions

 KisPerspectiveMath ()
 

Detailed Description

Definition at line 25 of file kis_perspective_math.h.

Constructor & Destructor Documentation

◆ KisPerspectiveMath()

KisPerspectiveMath::KisPerspectiveMath ( )
inlineprivate

Definition at line 28 of file kis_perspective_math.h.

28{ }

Member Function Documentation

◆ computeMatrixTransfo()

Matrix3qreal KisPerspectiveMath::computeMatrixTransfo ( const QPointF & topLeft1,
const QPointF & topRight1,
const QPointF & bottomLeft1,
const QPointF & bottomRight1,
const QPointF & topLeft2,
const QPointF & topRight2,
const QPointF & bottomLeft2,
const QPointF & bottomRight2 )
static

Definition at line 16 of file kis_perspective_math.cpp.

17{
18 Matrix9qreal a = Matrix9qreal::Zero();
19 Vector9qreal b = Vector9qreal::Zero();
20
21 // topLeft
22 a.coeffRef(0, 0) = topLeft1.x();
23 a.coeffRef(0, 1) = topLeft1.y();
24 a.coeffRef(0, 2) = 1;
25 a.coeffRef(0, 6) = -topLeft2.x() * topLeft1.x();
26 a.coeffRef(0, 7) = -topLeft2.x() * topLeft1.y();
27 a.coeffRef(0, 8) = -topLeft2.x();
28 a.coeffRef(1, 3) = topLeft1.x();
29 a.coeffRef(1, 4) = topLeft1.y();
30 a.coeffRef(1, 5) = 1;
31 a.coeffRef(1, 6) = -topLeft2.y() * topLeft1.x();
32 a.coeffRef(1, 7) = -topLeft2.y() * topLeft1.y();
33 a.coeffRef(1, 8) = -topLeft2.y();
34 // topRight
35 a.coeffRef(2, 0) = topRight1.x();
36 a.coeffRef(2, 1) = topRight1.y();
37 a.coeffRef(2, 2) = 1;
38 a.coeffRef(2, 6) = -topRight2.x() * topRight1.x();
39 a.coeffRef(2, 7) = -topRight2.x() * topRight1.y();
40 a.coeffRef(2, 8) = -topRight2.x();
41 a.coeffRef(3, 3) = topRight1.x();
42 a.coeffRef(3, 4) = topRight1.y();
43 a.coeffRef(3, 5) = 1;
44 a.coeffRef(3, 6) = -topRight2.y() * topRight1.x();
45 a.coeffRef(3, 7) = -topRight2.y() * topRight1.y();
46 a.coeffRef(3, 8) = -topRight2.y();
47 // bottomLeft
48 a.coeffRef(4, 0) = bottomLeft1.x();
49 a.coeffRef(4, 1) = bottomLeft1.y();
50 a.coeffRef(4, 2) = 1;
51 a.coeffRef(4, 6) = -bottomLeft2.x() * bottomLeft1.x();
52 a.coeffRef(4, 7) = -bottomLeft2.x() * bottomLeft1.y();
53 a.coeffRef(4, 8) = -bottomLeft2.x();
54 a.coeffRef(5, 3) = bottomLeft1.x();
55 a.coeffRef(5, 4) = bottomLeft1.y();
56 a.coeffRef(5, 5) = 1;
57 a.coeffRef(5, 6) = -bottomLeft2.y() * bottomLeft1.x();
58 a.coeffRef(5, 7) = -bottomLeft2.y() * bottomLeft1.y();
59 a.coeffRef(5, 8) = -bottomLeft2.y();
60 // bottomRight
61 a.coeffRef(6, 0) = bottomRight1.x();
62 a.coeffRef(6, 1) = bottomRight1.y();
63 a.coeffRef(6, 2) = 1;
64 a.coeffRef(6, 6) = -bottomRight2.x() * bottomRight1.x();
65 a.coeffRef(6, 7) = -bottomRight2.x() * bottomRight1.y();
66 a.coeffRef(6, 8) = -bottomRight2.x();
67 a.coeffRef(7, 3) = bottomRight1.x();
68 a.coeffRef(7, 4) = bottomRight1.y();
69 a.coeffRef(7, 5) = 1;
70 a.coeffRef(7, 6) = -bottomRight2.y() * bottomRight1.x();
71 a.coeffRef(7, 7) = -bottomRight2.y() * bottomRight1.y();
72 a.coeffRef(7, 8) = -bottomRight2.y();
73 a.coeffRef(8, 8) = 1;
74 b.coeffRef(8) = 1;
75// dbgImage <<" a := { {" << a(0,0) <<" ," << a(0,1) <<" ," << a(0,2) <<" ," << a(0,3) <<" ," << a(0,4) <<" ," << a(0,5) <<" ," << a(0,6) <<" ," << a(0,7) <<" ," << a(0,8) <<" } , {" << a(1,0) <<" ," << a(1,1) <<" ," << a(1,2) <<" ," << a(1,3) <<" ," << a(1,4) <<" ," << a(1,5) <<" ," << a(1,6) <<" ," << a(1,7) <<" ," << a(1,8) <<" } , {" << a(2,0) <<" ," << a(2,1) <<" ," << a(2,2) <<" ," << a(2,3) <<" ," << a(2,4) <<" ," << a(2,5) <<" ," << a(2,6) <<" ," << a(2,7) <<" ," << a(2,8) <<" } , {" << a(3,0) <<" ," << a(3,1) <<" ," << a(3,2) <<" ," << a(3,3) <<" ," << a(3,4) <<" ," << a(3,5) <<" ," << a(3,6) <<" ," << a(3,7) <<" ," << a(3,8) <<" } , {" << a(4,0) <<" ," << a(4,1) <<" ," << a(4,2) <<" ," << a(4,3) <<" ," << a(4,4) <<" ," << a(4,5) <<" ," << a(4,6) <<" ," << a(4,7) <<" ," << a(4,8) <<" } , {" << a(5,0) <<" ," << a(5,1) <<" ," << a(5,2) <<" ," << a(5,3) <<" ," << a(5,4) <<" ," << a(5,5) <<" ," << a(5,6) <<" ," << a(5,7) <<" ," << a(5,8) <<" } , {" << a(6,0) <<" ," << a(6,1) <<" ," << a(6,2) <<" ," << a(6,3) <<" ," << a(6,4) <<" ," << a(6,5) <<" ," << a(6,6) <<" ," << a(6,7) <<" ," << a(6,8) <<" } , {"<< a(7,0) <<" ," << a(7,1) <<" ," << a(7,2) <<" ," << a(7,3) <<" ," << a(7,4) <<" ," << a(7,5) <<" ," << a(7,6) <<" ," << a(7,7) <<" ," << a(7,8) <<" } , {"<< a(8,0) <<" ," << a(8,1) <<" ," << a(8,2) <<" ," << a(8,3) <<" ," << a(8,4) <<" ," << a(8,5) <<" ," << a(8,6) <<" ," << a(8,7) <<" ," << a(8,8) <<" } };";
76 Vector9qreal v;
77 v = a.lu().solve(b);
78 Matrix3qreal matrix;
79 for (int r = 0; r < 3; r++) for (int c = 0; c < 3; c++) matrix.coeffRef(r, c) = v.coeff(3 * r + c);
80 return matrix;
81}
v
qreal v
Definition KisBezierUtils.cpp:702
Matrix9qreal
Eigen::Matrix< qreal, 9, 9 > Matrix9qreal
Definition kis_perspective_math.h:17
Matrix3qreal
Eigen::Matrix< qreal, 3, 3 > Matrix3qreal
Definition kis_perspective_math.h:16
Vector9qreal
Eigen::Matrix< qreal, 9, 1 > Vector9qreal
Definition kis_perspective_math.h:18
resize_to_all_layers.b
b
Definition resize_to_all_layers.py:26
resize_to_all_layers.r
r
Definition resize_to_all_layers.py:22

References v.

◆ computeMatrixTransfoFromPerspective()

Matrix3qreal KisPerspectiveMath::computeMatrixTransfoFromPerspective ( const QRect & r,
const QPointF & topLeft,
const QPointF & topRight,
const QPointF & bottomLeft,
const QPointF & bottomRight )
static

Definition at line 88 of file kis_perspective_math.cpp.

89{
90 return KisPerspectiveMath::computeMatrixTransfo(r.topLeft(), r.topRight(), r.bottomLeft(), r.bottomRight(), topLeft, topRight, bottomLeft, bottomRight);
91}
KisPerspectiveMath::computeMatrixTransfo
static Matrix3qreal computeMatrixTransfo(const QPointF &topLeft1, const QPointF &topRight1, const QPointF &bottomLeft1, const QPointF &bottomRight1, const QPointF &topLeft2, const QPointF &topRight2, const QPointF &bottomLeft2, const QPointF &bottomRight2)
Definition kis_perspective_math.cpp:16

References computeMatrixTransfo().

◆ computeMatrixTransfoToPerspective()

Matrix3qreal KisPerspectiveMath::computeMatrixTransfoToPerspective ( const QPointF & topLeft,
const QPointF & topRight,
const QPointF & bottomLeft,
const QPointF & bottomRight,
const QRect & r )
static

Definition at line 83 of file kis_perspective_math.cpp.

84{
85 return KisPerspectiveMath::computeMatrixTransfo(topLeft, topRight, bottomLeft, bottomRight, r.topLeft(), r.topRight(), r.bottomLeft(), r.bottomRight());
86}

References computeMatrixTransfo().

◆ matProd()

static QPointF KisPerspectiveMath::matProd ( const Matrix3qreal & m,
const QPointF & p )
inlinestatic

TODO: get rid of this in 2.0.

Definition at line 34 of file kis_perspective_math.h.

34 {
35 qreal s = qreal(1) / (p.x() * m.coeff(2, 0) + p.y() * m.coeff(2, 1) + 1.0);
36 return QPointF((p.x() * m.coeff(0, 0) + p.y() * m.coeff(0, 1) + m.coeff(0, 2)) * s,
37 (p.x() * m.coeff(1, 0) + p.y() * m.coeff(1, 1) + m.coeff(1, 2)) * s);
38 }
p
const Params2D p
Definition KisBezierUtils.cpp:703

References p.

The documentation for this class was generated from the following files: