Generates a topLeftClockWise or bottomLeftCounterClockWise (flipOnYAxis=true) spiral wipe: More...
#include <spiralwipe.hxx>
Public Member Functions | |
| SpiralWipe (sal_Int32 nElements, bool flipOnYAxis=false) | |
| virtual ::basegfx::B2DPolyPolygon | operator() (double t) 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... | |
Protected Member Functions | |
| ::basegfx::B2DPolyPolygon | calcNegSpiral (double t) const |
Protected Attributes | |
| const sal_Int32 | m_elements |
| const sal_Int32 | m_sqrtElements |
| const bool | m_flipOnYAxis |
Detailed Description
Generates a topLeftClockWise or bottomLeftCounterClockWise (flipOnYAxis=true) spiral wipe:
Definition at line 30 of file spiralwipe.hxx.
Constructor & Destructor Documentation
◆ SpiralWipe()
| slideshow::internal::SpiralWipe::SpiralWipe | ( | sal_Int32 | nElements, |
| bool | flipOnYAxis = false |
||
| ) |
Definition at line 32 of file spiralwipe.cxx.
References m_elements, and nElements.
Member Function Documentation
◆ calcNegSpiral()
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protected |
Definition at line 40 of file spiralwipe.cxx.
References basegfx::B2DPolyPolygon::append(), basegfx::utils::createScaleB2DHomMatrix(), basegfx::utils::createTranslateB2DHomMatrix(), slideshow::internal::createUnitRect(), m_elements, m_sqrtElements, basegfx::B2DHomMatrix::rotate(), basegfx::B2DHomMatrix::scale(), t, basegfx::B2DPolygon::transform(), basegfx::B2DHomMatrix::translate(), and w.
Referenced by operator()(), and slideshow::internal::BoxSnakesWipe::operator()().
◆ operator()()
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overridevirtual |
Retrieve the poly-polygon for value t.
- Parameters
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t Current 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.
Reimplemented in slideshow::internal::BoxSnakesWipe.
Definition at line 82 of file spiralwipe.cxx.
References basegfx::B2DPolyPolygon::append(), calcNegSpiral(), slideshow::internal::createUnitRect(), basegfx::B2DPolyPolygon::flip(), slideshow::internal::flipOnYAxis(), m_flipOnYAxis, and t.
Member Data Documentation
◆ m_elements
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protected |
Definition at line 38 of file spiralwipe.hxx.
Referenced by calcNegSpiral().
◆ m_flipOnYAxis
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protected |
Definition at line 40 of file spiralwipe.hxx.
Referenced by operator()(), and slideshow::internal::BoxSnakesWipe::operator()().
◆ m_sqrtElements
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protected |
Definition at line 39 of file spiralwipe.hxx.
Referenced by calcNegSpiral().
The documentation for this class was generated from the following files:
