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retina.h File Reference

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Detailed Description

Retina class and associated functions.

Header

/u/nn/cvsroot/lissom/src/retina.h,v 1.38 2002/06/19 04:21:42 yschoe Exp

Definition in file retina.h.

#include <assert.h>
#include <algorithm>
#include "genericalgs.h"
#include "robj.h"
#include "neuralregion.h"
#include "matrix.h"
#include "allocatingpointer.h"

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Compounds
class	Retina
	Basic retina implemented as a transparent window into the world. More...
Functions
template<class Matrix> void	draw (Matrix &area, const Retinal_Obj *obj, const typename Matrix::value_type xoff=0.5, const typename Matrix::value_type yoff=0.5, const typename Matrix::value_type size_scale=1.0)
	Generic Retinal_Obj draw function into a matrix.

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Function Documentation

template<class Matrix> void draw (  Matrix &    area, const Retinal_Obj *    obj, const typename Matrix::value_type    xoff = 0.5, const typename Matrix::value_type    yoff = 0.5, const typename Matrix::value_type    size_scale = 1.0 )

Generic Retinal_Obj draw function into a matrix. The integer eye matrix coordinates (r,c) are first mapped into real-valued world coordinates (x,y). This requires flipping the vertical dimension (since arrays are numbered from the top down yet the Y axis increases from the bottom up) and sampling at the center of the pixel covering (x,y) to (x+1,y+1), which requires an offset of (0.5,0.5). Nothing is drawn if the given object pointer is null; such a condition is generally but not always an error. Definition at line 37 of file retina.h. References Retinal_Obj::activation(), and Retinal_Obj::update(). Referenced by Retina::activate().

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