LibreOffice Module slideshow (master) 1
Public Member Functions | Private Attributes | List of all members
slideshow::internal::BarnDoorWipe Class Reference

Generate a barn door wipe or double barn door wipe: More...

#include <barndoorwipe.hxx>

Inheritance diagram for slideshow::internal::BarnDoorWipe:
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Collaboration diagram for slideshow::internal::BarnDoorWipe:
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Public Member Functions

 BarnDoorWipe (bool doubled=false)
 
virtual ::basegfx::B2DPolyPolygon operator() (double x) override
 Retrieve the poly-polygon for value t. More...
 
- Public Member Functions inherited from slideshow::internal::ParametricPolyPolygon
virtual ~ParametricPolyPolygon ()
 
virtual ::basegfx::B2DPolyPolygon operator() (double t)=0
 Retrieve the poly-polygon for value t. More...
 

Private Attributes

const ::basegfx::B2DPolygon m_unitRect
 
const bool m_doubled
 

Detailed Description

Generate a barn door wipe or double barn door wipe:

Definition at line 31 of file barndoorwipe.hxx.

Constructor & Destructor Documentation

◆ BarnDoorWipe()

slideshow::internal::BarnDoorWipe::BarnDoorWipe ( bool  doubled = false)
inlineexplicit

Definition at line 34 of file barndoorwipe.hxx.

Member Function Documentation

◆ operator()()

basegfx::B2DPolyPolygon slideshow::internal::BarnDoorWipe::operator() ( double  t)
overridevirtual

Retrieve the poly-polygon for value t.

Parameters
tCurrent parameter value to retrieve the corresponding poly-polygon for. Permissible values for t must be in the range [0,1].
Returns
a poly-polygon corresponding to the given parameter value. The poly-polygon is interpreted as living in the unit rectangle (i.e. [0,1]x[0,1]), but is not necessarily constrained to completely lie in this area (this very much depends on the actual effect to be generated). Although, from a performance perspective, it currently is advantageous to try to keep the poly-polygon within these bounds (at least if there are no hard reasons not to do so), because then reversion or out transformations are potentially faster to compute (see the TransitionInfo::meReverseMethod member in transitionfactory.cxx). Furthermore, if one of the polygon modifications involve subtraction (also see TransitionInfo::meReverseMethod), all generated polygons should be oriented clock-wise (i.e. traversing the polygon vertices with increasing vertex index should generate a clock-wise movement).

Implements slideshow::internal::ParametricPolyPolygon.

Definition at line 29 of file barndoorwipe.cxx.

References basegfx::B2DPolyPolygon::append(), basegfx::utils::createTranslateB2DHomMatrix(), m_doubled, m_unitRect, basegfx::B2DHomMatrix::rotate(), basegfx::B2DHomMatrix::scale(), t, basegfx::B2DPolygon::transform(), and basegfx::B2DHomMatrix::translate().

Member Data Documentation

◆ m_doubled

const bool slideshow::internal::BarnDoorWipe::m_doubled
private

Definition at line 43 of file barndoorwipe.hxx.

Referenced by operator()().

◆ m_unitRect

const ::basegfx::B2DPolygon slideshow::internal::BarnDoorWipe::m_unitRect
private

Definition at line 42 of file barndoorwipe.hxx.

Referenced by operator()().


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