KernelCAD Documentation

Defines a non-persistent transformation in 2D space.
The following transformations are implemented :
. Translation, Rotation, Scale
. Symmetry with respect to a point and a line.
Complex transformations can be obtained by combining the
previous elementary transformations using the method Multiply.
The transformations can be represented as follow :

V1 V2 T XY XY
| a11 a12 a13 | | x | | x'|
| a21 a22 a23 | | y | | y'|
| 0 0 1 | | 1 | | 1 |

Query IKO_Standard_Object from this interface to create a copy or obtain the type name

Methods

Init

_CSFDB_Getgp_Trsf2dscale

_CSFDB_Setgp_Trsf2dscale

_CSFDB_Getgp_Trsf2dshape

_CSFDB_Setgp_Trsf2dshape

_CSFDB_Getgp_Trsf2dmatrix

_CSFDB_Getgp_Trsf2dloc

HRESULT Init()

Returns identity transformation.

HRESULT Init1(IKO_gp_Trsf* T)

Creates a 2d transformation in the XY plane from a
3d transformation .

HRESULT SetMirror(KC2D* P)

Changes the transformation into a symmetrical transformation.
P is the center of the symmetry.

HRESULT SetMirror1(IKO_gp_Ax2d* A)

HRESULT SetRotation(KC2D* P, double Ang)

Changes the transformation into a rotation.
P is the rotation's center and Ang is the angular value of the
rotation in radian.

HRESULT SetScale(KC2D* P, double S)

Changes the transformation into a scale.
P is the center of the scale and S is the scaling value.

HRESULT SetTransformation(IKO_gp_Ax2d* FromSystem1, IKO_gp_Ax2d* ToSystem2)

HRESULT SetTransformation1(IKO_gp_Ax2d* ToSystem)

HRESULT SetTranslation(KC2D* V)

Changes the transformation into a translation.
V is the vector of the translation.

HRESULT SetTranslation1(KC2D* P1, KC2D* P2)

Makes the transformation into a translation from
the point P1 to the point P2.

HRESULT SetTranslationPart(KC2D* V)

HRESULT SetScaleFactor(double S)

HRESULT IsNegative(VARIANT_BOOL* ret)

Returns true if the determinant of the vectorial part of
this transformation is negative..

HRESULT Form(gp_TrsfFormKO* ret)

Returns the nature of the transformation. It can be an
identity transformation, a rotation, a translation, a mirror
(relative to a point or an axis), a scaling transformation,
or a compound transformation.

HRESULT ScaleFactor(double* ret)

Returns the scale factor.

HRESULT TranslationPart(KC2D* ret)

Returns the translation part of the transformation's matrix

HRESULT VectorialPart(IKO_gp_Mat2d** ret)

HRESULT HVectorialPart(IKO_gp_Mat2d** ret)

Returns the homogeneous vectorial part of the transformation.
It is a 2*2 matrix which doesn't include the scale factor.
The coefficients of this matrix must be multiplied by the
scale factor to obtain the coefficients of the transformation.

HRESULT RotationPart(double* ret)

HRESULT Value(int Row, int Col, double* ret)

Returns the coefficients of the transformation's matrix.
It is a 2 rows * 3 columns matrix.
Raises OutOfRange if Row 1 or Row 2 or Col 1 or Col 3

HRESULT Invert()

HRESULT Inverted(IKO_gp_Trsf2d** ret)

Computes the reverse transformation.
Raises an exception if the matrix of the transformation
is not inversible, it means that the scale factor is lower
or equal to Resolution from package gp.

HRESULT Multiplied(IKO_gp_Trsf2d* T, IKO_gp_Trsf2d** ret)

HRESULT Multiply(IKO_gp_Trsf2d* T)

HRESULT PreMultiply(IKO_gp_Trsf2d* T)

HRESULT Power(int N)

HRESULT Powered(int N, IKO_gp_Trsf2d** ret)

Computes the following composition of transformations
this * this * .......* me, N time.
if N = 0 this = Identity
if N 0 this = me.Inverse() *...........* me.Inverse().

HRESULT Transforms(double* X, double* Y)

HRESULT Transforms1(KC2D* Coord)

Transforms a doublet XY with a Trsf2d

HRESULT _CSFDB_Getgp_Trsf2dscale(double* ret)

HRESULT _CSFDB_Setgp_Trsf2dscale(double p)

HRESULT _CSFDB_Getgp_Trsf2dshape(gp_TrsfFormKO* ret)

HRESULT _CSFDB_Setgp_Trsf2dshape(gp_TrsfFormKO p)

HRESULT _CSFDB_Getgp_Trsf2dmatrix(IKO_gp_Mat2d** ret)

HRESULT _CSFDB_Getgp_Trsf2dloc(KC2D* ret)