sciGraphics::AxisPositioner Class Reference

#include </home/scilab/compilation_chain/sci_checkOut/scilab/modules/renderer/src/cpp/subwinDrawing/AxisPositioner.hxx>

Inheritance diagram for sciGraphics::AxisPositioner:

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Public Member Functions
	AxisPositioner (void)
virtual	~AxisPositioner (void)
virtual void	getAxisBounds (double startBound[3], double endBound[3])=0
virtual void	getGridEdges (double startBound1[3], double startBound2[3], double middleBound1[3], double middleBound2[3], double endBound1[3], double endBound2[3])
virtual void	getTicksDirection (double ticksDir[3])=0
virtual int	getRelativeTicksPosition (double ticksPos[], int nbTicks)=0
Protected Member Functions
virtual void	setTicksDirectionLength (double ticksDir[3], sciPointObj *pSubwin)

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Detailed Description

Interface for determining on which edge of axes box an axe will be

Definition at line 28 of file AxisPositioner.hxx.

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Constructor & Destructor Documentation

sciGraphics::AxisPositioner::AxisPositioner

(

void

)

[inline]

Definition at line 32 of file AxisPositioner.hxx.

{}

virtual sciGraphics::AxisPositioner::~AxisPositioner

(

void

)

[inline, virtual]

Definition at line 34 of file AxisPositioner.hxx.

{}

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Member Function Documentation

virtual void sciGraphics::AxisPositioner::getAxisBounds	(	double	startBound[3],
		double	endBound[3]
	)			[pure virtual]

Get the two bounds of this axis.

Implemented in sciGraphics::AxesPositioner, sciGraphics::BottomXAxisPositioner, sciGraphics::LeftYAxisPositioner, sciGraphics::MiddleXAxisPositioner, sciGraphics::MiddleYAxisPositioner, sciGraphics::RightYAxisPositioner, sciGraphics::TopXAxisPositioner, and sciGraphics::ZAxisPositioner.

Referenced by sciGraphics::TicksDrawer::drawTicks(), sciGraphics::TicksDrawer::getAxisPosition(), and sciGraphics::SubwinAxisPositioner::getTicksDirection().

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virtual void sciGraphics::AxisPositioner::getGridEdges	(	double	startBound1[3],
		double	startBound2[3],
		double	middleBound1[3],
		double	middleBound2[3],
		double	endBound1[3],
		double	endBound2[3]
	)			[inline, virtual]

Find the edges on which the grid will be displayed from the axes. Box. Grid is drawn on 2 facets, then 3 edges are necessary. This function is not useful for all axes drawer and drawer which need it must redefine it.

Reimplemented in sciGraphics::XAxisPositioner, sciGraphics::YAxisPositioner, and sciGraphics::ZAxisPositioner.

Definition at line 47 of file AxisPositioner.hxx.

Referenced by sciGraphics::TicksDrawer::drawTicks().

                                                                      {}

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virtual void sciGraphics::AxisPositioner::getTicksDirection

(

double

ticksDir[3]

)

[pure virtual]

Compute the direction and length of ticks

Implemented in sciGraphics::AxesPositioner, and sciGraphics::SubwinAxisPositioner.

Referenced by sciGraphics::TicksDrawer::drawTicks(), and sciGraphics::TicksDrawer::getAxisPosition().

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virtual int sciGraphics::AxisPositioner::getRelativeTicksPosition	(	double	ticksPos[],
		int	nbTicks
	)			[pure virtual]

Convert ticks abscissas, into relative coordinates between the two axis bounds

Parameters:

	ticksPos	abscissas of ticks along their axis as input in output, get the relative coordinates between the axes bounds. 0 stands fot the start bound, 1 for the last one.
	nbTicks	number of ticks abascissas as input

Returns:

number of ticks as output

Implemented in sciGraphics::AxesPositioner, sciGraphics::XAxisPositioner, sciGraphics::YAxisPositioner, and sciGraphics::ZAxisPositioner.

Referenced by sciGraphics::TicksDrawer::drawTicks().

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void sciGraphics::AxisPositioner::setTicksDirectionLength	(	double	ticksDir[3],
		sciPointObj *	pSubwin
	)			[protected, virtual]

Modify the length of ticks dir depending on the size of the parent subwin.

Definition at line 29 of file AxisPositioner.cpp.

References Abs, fact(), sciGraphics::DrawableSubwin::getCamera(), sciGraphics::Camera::getPixelCoordinatesRaw(), sciGraphics::Camera::getSceneCoordinatesRaw(), sciGraphics::getSubwinDrawer(), sciGraphics::Camera::getViewingArea(), M_PI, Max, normalize3D(), scalarMult3D(), TICKS_PIXEL_LENGTH, vectSubstract3D(), and width.

Referenced by sciGraphics::SubwinAxisPositioner::getTicksDirection(), and sciGraphics::AxesPositioner::getTicksDirection().

{
  Camera * camera = getSubwinDrawer(pSubwin)->getCamera();
  double origin[3] = {0.0, 0.0, 0.0};
  camera->getPixelCoordinatesRaw(origin, origin);

  double pixDir[3];
  camera->getPixelCoordinatesRaw(ticksDir, pixDir);
  // get length in pixels
  vectSubstract3D(pixDir, origin, pixDir);
  normalize3D(pixDir);

  // get the viewport associated with the subwindow
  int xPos;
  int yPos;
  int width;
  int height;
  camera->getViewingArea(&xPos, &yPos, &width, &height);
                
  // compute sizes wich would apply if axes where along X or Y axis
  // and use at least 2 pixels
  double xSize = Max(width * TICKS_PIXEL_LENGTH, 2);
  double ySize = Max(height * TICKS_PIXEL_LENGTH, 2);
                
  // compute angle between ticks direction and x axis in pixel coordinates, pixDir[0]
  double angle = acos(Abs(pixDir[0]));
                
  // push it between 0 and 1.
  double fact = angle * 2.0 / M_PI;
                
  // apply number of pixels 
  scalarMult3D(pixDir, ((1.0 - fact) * xSize + fact * ySize), pixDir);

  // convert pix direction in 3D
  origin[0] = 0.0;
  origin[1] = 0.0;
  origin[2] = 0.0;
  camera->getSceneCoordinatesRaw(origin, origin);
  camera->getSceneCoordinatesRaw(pixDir, ticksDir);
  vectSubstract3D(ticksDir, origin, ticksDir);
}

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

• /home/scilab/compilation_chain/sci_checkOut/scilab/modules/renderer/src/cpp/subwinDrawing/AxisPositioner.hxx
• /home/scilab/compilation_chain/sci_checkOut/scilab/modules/renderer/src/cpp/subwinDrawing/AxisPositioner.cpp