Main Page   Namespace List   Class Hierarchy   Compound List   File List   Namespace Members   Compound Members  

WPCG::WP_Ray2D Class Reference

#include <WP_Ray2D.h>

List of all members.

Public Methods

 WP_Ray2D ()
 WP_Ray2D (const WP_Point2D &p, const WP_Vector2D &v)
 WP_Ray2D (WP_Line2D &l)
 ~WP_Ray2D ()
int intersection (const WP_Ray2D &r, WP_Point2D &p) const
void draw () const

Public Attributes

WP_Point2D start
WP_Vector2D direction


Detailed Description

this class represents a 2D ray
Author:
Copyright (C) 2001 W.P. van Paassen peter@paassen.tmfweb.nl
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; see the file COPYING. If not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.


Constructor & Destructor Documentation

WPCG::WP_Ray2D::WP_Ray2D   [inline]
 

WPCG::WP_Ray2D::WP_Ray2D const WP_Point2D   p,
const WP_Vector2D   v
 

Parameters:
p  a WP_Point2D object representing the start point of the ray
v  a WP_Vector2D object representing the direction vector of the ray

WPCG::WP_Ray2D::WP_Ray2D WP_Line2D   l
 

Parameters:
l  a WP_Line2D object representing a 2D line from which a 2D ray is constructed

WPCG::WP_Ray2D::~WP_Ray2D   [inline]
 


Member Function Documentation

void WPCG::WP_Ray2D::draw   const
 

this function draws the 2D ray to the screen using OpenGL

int WPCG::WP_Ray2D::intersection const WP_Ray2D &    r,
WP_Point2D   p
const
 

this function computes the intersection point of this ray and the given ray. See Chapter 4, page 186, Computer Graphics using OpenGL, F.S. Hill

Parameters:
r  a WP_Ray2D object representing the ray which may intersect with this ray object
p  a WP_Point2D object which will be filled with the intersection point if one is found
Returns:
-2 in case the rays overlap
-1 in case this ray exits from the ray r (compared to its normal)
0 in case this ray is parallel to ray r
1 in case this ray enters the ray r (compared to its normal)


Member Data Documentation

WP_Vector2D WPCG::WP_Ray2D::direction
 

a WP_Vector2D object representing the directional vector of this 2D ray

WP_Point2D WPCG::WP_Ray2D::start
 

a WP_Point2D object representing the start point of the 2D ray


The documentation for this class was generated from the following files:
Generated on Tue Jan 28 20:26:42 2003 by doxygen1.2.14 written by Dimitri van Heesch, © 1997-2002