This virtual class represents objects that can be moved to an arbitrary 2D location+rotation.
The current transformation is set through SetCoordinateBase. To ease the implementation of descendent classes, mpMovableObject will be in charge of Bounding Box computation and layer rendering, assuming that the object updates its shape in m_shape_xs & m_shape_ys.
Definition at line 1433 of file mathplot.h.
#include <mrpt/otherlibs/mathplot/mathplot.h>
Public Member Functions | |
mpMovableObject () | |
Default constructor (sets location and rotation to (0,0,0)) | |
virtual | ~mpMovableObject () |
void | GetCoordinateBase (double &x, double &y, double &phi) const |
Get the current coordinate transformation. | |
void | SetCoordinateBase (double x, double y, double phi=0) |
Set the coordinate transformation (phi in radians, 0 means no rotation). | |
virtual bool | HasBBox () |
Check whether this layer has a bounding box. | |
virtual double | GetMinX () |
Get inclusive left border of bounding box. | |
virtual double | GetMaxX () |
Get inclusive right border of bounding box. | |
virtual double | GetMinY () |
Get inclusive bottom border of bounding box. | |
virtual double | GetMaxY () |
Get inclusive top border of bounding box. | |
virtual void | Plot (wxDC &dc, mpWindow &w) |
Plot given view of layer to the given device context. | |
void | SetAlign (int align) |
Set label axis alignment. | |
Protected Member Functions | |
void | TranslatePoint (double x, double y, double &out_x, double &out_y) |
A method for 2D translation and rotation, using the current transformation stored in m_reference_x,m_reference_y,m_reference_phi. | |
void | ShapeUpdated () |
Must be called by the descendent class after updating the shape (m_shape_xs/ys), or when the transformation changes. | |
Protected Attributes | |
int | m_flags |
Holds label alignment. | |
double | m_reference_x |
The coordinates of the object (orientation "phi" is in radians). | |
double | m_reference_y |
double | m_reference_phi |
std::vector< double > | m_shape_xs |
This contains the object points, in local coordinates (to be transformed by the current transformation). | |
std::vector< double > | m_shape_ys |
std::vector< double > | m_trans_shape_xs |
The buffer for the translated & rotated points (to avoid recomputing them with each mpWindow refresh). | |
std::vector< double > | m_trans_shape_ys |
double | m_bbox_min_x |
The precomputed bounding box: | |
double | m_bbox_max_x |
double | m_bbox_min_y |
double | m_bbox_max_y |
mpMovableObject::mpMovableObject | ( | ) | [inline] |
Default constructor (sets location and rotation to (0,0,0))
Definition at line 1438 of file mathplot.h.
References mpLAYER_PLOT.
virtual mpMovableObject::~mpMovableObject | ( | ) | [inline, virtual] |
Definition at line 1448 of file mathplot.h.
void mpMovableObject::GetCoordinateBase | ( | double & | x, |
double & | y, | ||
double & | phi | ||
) | const [inline] |
Get the current coordinate transformation.
Definition at line 1452 of file mathplot.h.
virtual double mpMovableObject::GetMaxX | ( | ) | [inline, virtual] |
Get inclusive right border of bounding box.
Reimplemented from mpLayer.
Definition at line 1478 of file mathplot.h.
virtual double mpMovableObject::GetMaxY | ( | ) | [inline, virtual] |
Get inclusive top border of bounding box.
Reimplemented from mpLayer.
Definition at line 1486 of file mathplot.h.
virtual double mpMovableObject::GetMinX | ( | ) | [inline, virtual] |
Get inclusive left border of bounding box.
Reimplemented from mpLayer.
Definition at line 1474 of file mathplot.h.
virtual double mpMovableObject::GetMinY | ( | ) | [inline, virtual] |
Get inclusive bottom border of bounding box.
Reimplemented from mpLayer.
Definition at line 1482 of file mathplot.h.
virtual bool mpMovableObject::HasBBox | ( | ) | [inline, virtual] |
Check whether this layer has a bounding box.
The default implementation returns TRUE. Override and return FALSE if your mpLayer implementation should be ignored by the calculation of the global bounding box for all layers in a mpWindow.
TRUE | Has bounding box |
FALSE | Has not bounding box |
Reimplemented from mpLayer.
Definition at line 1470 of file mathplot.h.
virtual void mpMovableObject::Plot | ( | wxDC & | dc, |
mpWindow & | w | ||
) | [virtual] |
Plot given view of layer to the given device context.
An implementation of this function has to transform layer coordinates to wxDC coordinates based on the view parameters retrievable from the mpWindow passed in w. Note that the public methods of mpWindow: x2p,y2p and p2x,p2y are already provided which transform layer coordinates to DC pixel coordinates, and user code should rely on them for portability and future changes to be applied transparently, instead of implementing the following formulas manually.
The passed device context dc has its coordinate origin set to the top-left corner of the visible area (the default). The coordinate orientation is as shown in the following picture:
(wxDC origin 0,0) x-------------> ascending X ----------------+ | | | | V ascending Y | | | | | | | +-------------------------------------------+ <-- right-bottom corner of the mpWindow visible area.
Note that Y ascends in downward direction, whereas the usual vertical orientation for mathematical plots is vice versa. Thus Y-orientation will be swapped usually, when transforming between wxDC and mpLayer coordinates. This change of coordinates is taken into account in the methods p2x,p2y,x2p,y2p.
Rules for transformation between mpLayer and wxDC coordinates
dc_X = (layer_X - mpWindow::GetPosX()) * mpWindow::GetScaleX() dc_Y = (mpWindow::GetPosY() - layer_Y) * mpWindow::GetScaleY() // swapping Y-orientation layer_X = (dc_X / mpWindow::GetScaleX()) + mpWindow::GetPosX() // scale guaranteed to be not 0 layer_Y = mpWindow::GetPosY() - (dc_Y / mpWindow::GetScaleY()) // swapping Y-orientation
dc | Device context to plot to. |
w | View to plot. The visible area can be retrieved from this object. |
Implements mpLayer.
void mpMovableObject::SetAlign | ( | int | align | ) | [inline] |
Set label axis alignment.
align | alignment (choose between mpALIGN_NE, mpALIGN_NW, mpALIGN_SW, mpALIGN_SE |
Definition at line 1493 of file mathplot.h.
void mpMovableObject::SetCoordinateBase | ( | double | x, |
double | y, | ||
double | phi = 0 |
||
) | [inline] |
Set the coordinate transformation (phi in radians, 0 means no rotation).
Definition at line 1461 of file mathplot.h.
References mpALIGN_NE, and internal::y.
void mpMovableObject::ShapeUpdated | ( | ) | [protected] |
Must be called by the descendent class after updating the shape (m_shape_xs/ys), or when the transformation changes.
This method updates the buffers m_trans_shape_xs/ys, and the precomputed bounding box.
void mpMovableObject::TranslatePoint | ( | double | x, |
double | y, | ||
double & | out_x, | ||
double & | out_y | ||
) | [protected] |
A method for 2D translation and rotation, using the current transformation stored in m_reference_x,m_reference_y,m_reference_phi.
double mpMovableObject::m_bbox_max_x [protected] |
Definition at line 1518 of file mathplot.h.
double mpMovableObject::m_bbox_max_y [protected] |
Definition at line 1518 of file mathplot.h.
double mpMovableObject::m_bbox_min_x [protected] |
double mpMovableObject::m_bbox_min_y [protected] |
Definition at line 1518 of file mathplot.h.
int mpMovableObject::m_flags [protected] |
Holds label alignment.
Definition at line 1493 of file mathplot.h.
double mpMovableObject::m_reference_phi [protected] |
Definition at line 1500 of file mathplot.h.
double mpMovableObject::m_reference_x [protected] |
The coordinates of the object (orientation "phi" is in radians).
Definition at line 1500 of file mathplot.h.
double mpMovableObject::m_reference_y [protected] |
Definition at line 1500 of file mathplot.h.
std::vector<double> mpMovableObject::m_shape_xs [protected] |
This contains the object points, in local coordinates (to be transformed by the current transformation).
Definition at line 1508 of file mathplot.h.
std::vector<double> mpMovableObject::m_shape_ys [protected] |
Definition at line 1508 of file mathplot.h.
std::vector<double> mpMovableObject::m_trans_shape_xs [protected] |
The buffer for the translated & rotated points (to avoid recomputing them with each mpWindow refresh).
Definition at line 1513 of file mathplot.h.
std::vector<double> mpMovableObject::m_trans_shape_ys [protected] |
Definition at line 1513 of file mathplot.h.
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