Tesseract  3.02
Public Member Functions | Public Attributes
QUAD_COEFFS Class Reference

#include <quadratc.h>

List of all members.

Public Member Functions

 QUAD_COEFFS ()
 QUAD_COEFFS (double xsq, float x, float constant)
float y (float x) const
void move (ICOORD vec)

Public Attributes

double a
float b
float c

Detailed Description

Definition at line 25 of file quadratc.h.

Constructor & Destructor Documentation

QUAD_COEFFS::QUAD_COEFFS ( ) [inline]

Definition at line 28 of file quadratc.h.

                  {
    }                            //empty constructor
QUAD_COEFFS::QUAD_COEFFS ( double  xsq,
float  x,
float  constant 
) [inline]

Definition at line 30 of file quadratc.h.

                                {
      a = xsq;
      b = x;
      c = constant;
    }

Member Function Documentation

void QUAD_COEFFS::move ( ICOORD  vec) [inline]

Definition at line 44 of file quadratc.h.

                          {  // by vector
      /************************************************************
        y - q = a (x - p)^2 + b (x - p) + c
        y - q = ax^2 - 2apx + ap^2 + bx - bp + c
          y = ax^2 + (b - 2ap)x + (c - bp + ap^2 + q)
      ************************************************************/
      inT16 p = vec.x ();
      inT16 q = vec.y ();

      c = (float) (c - b * p + a * p * p + q);
      b = (float) (b - 2 * a * p);
    }
float QUAD_COEFFS::y ( float  x) const [inline]

Definition at line 39 of file quadratc.h.

                           {  //at x
      return (float) ((a * x + b) * x + c);
    }

Member Data Documentation

double QUAD_COEFFS::a

Definition at line 58 of file quadratc.h.

float QUAD_COEFFS::b

Definition at line 59 of file quadratc.h.

float QUAD_COEFFS::c

Definition at line 60 of file quadratc.h.

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