drasys.or.geom.rect2
Interface TransformI

All Known Implementing Classes:

Transform

public interface TransformI

extends TransformI

An interface used by all algorithms to abstractly access 2-D homogeneous transformations.

References:

Computer Graphics : Principles and Practice (Systems Programming)
    James D. Foley (Editor), et al; Hardcover

Method Summary
void	combine(TransformI transform)           Includes the argument transform into this transform.
PointI	forward(PointI point)           Returns a point that is translated, scaled and rotated int the forward direction.
RangeI	forward(RangeI range)           Returns a range that is translated, scaled and rotated int the forward direction.
PointI	inverse(PointI point)           Returns a point that is translated, scaled and rotated int the inverse direction.
RangeI	inverse(RangeI range)           Returns a range that is translated, scaled and rotated int the inverse direction.
double	r11()
double	r12()
double	r21()
double	r22()
void	rotate(double angleInRadians)           Adds a rotation to the transformation.
void	scale(double scaleX, double scaleY)           Adds a scaling to the transformation.
void	set(double r11, double r12, double r21, double r22, double tx, double ty)           Sets the transformation matrix elements where the matrix is: [r11, r12, 0] [r21, r22, 0] [tx, ty, 1]
void	translate(double deltaX, double deltaY)           Adds a translation to the transformation.
double	tx()
double	ty()

 

Methods inherited from interface drasys.or.geom.TransformI

forwardTransform, forwardTransform, inputCoordinateSystem, inverseTransform, inverseTransform, outputCoordinateSystem

 

Method Detail

tx

public double tx()

ty

public double ty()

r11

public double r11()

r12

public double r12()

r21

public double r21()

r22

public double r22()

set

public void set(double r11,
                double r12,
                double r21,
                double r22,
                double tx,
                double ty)

Sets the transformation matrix elements where the matrix is:
[r11, r12, 0]
[r21, r22, 0]
[tx, ty, 1]

combine

public void combine(TransformI transform)

Includes the argument transform into this transform.

translate

public void translate(double deltaX,
                      double deltaY)

Adds a translation to the transformation. Where the translation is given by:
[ 1, 0, 0]
[ 0, 1, 0]
[deltaX, deltaY, 1]

scale

public void scale(double scaleX,
                  double scaleY)

Adds a scaling to the transformation. Where the scaling is given by:
[scaleX, 0, 0]
[ 0, scaleY, 0]
[ 0, 0, 1]

rotate

public void rotate(double angleInRadians)

Adds a rotation to the transformation. Where the rotation is given by:
[ cos, sin, 0]
[-sin, cos, 0]
[ 0, 0, 1]

forward

public PointI forward(PointI point)
               throws GeomException

Returns a point that is translated, scaled and rotated int the forward direction.

inverse

public PointI inverse(PointI point)
               throws GeomException

Returns a point that is translated, scaled and rotated int the inverse direction.

forward

public RangeI forward(RangeI range)
               throws GeomException

Returns a range that is translated, scaled and rotated int the forward direction.

inverse

public RangeI inverse(RangeI range)
               throws GeomException

Returns a range that is translated, scaled and rotated int the inverse direction.